A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations
There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or ineffi...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Abid, Khizar [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019transfer abstract |
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| Schlagwörter: |
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| Umfang: |
14 |
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| Übergeordnetes Werk: |
Enthalten in: Iterated Gilbert mosaics - Baccelli, Francois ELSEVIER, 2019, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:177 ; year:2019 ; pages:79-92 ; extent:14 |
| Links: |
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| DOI / URN: |
10.1016/j.petrol.2019.02.038 |
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ELV046284052 |
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| 520 | |a There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. | ||
| 520 | |a There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. | ||
| 650 | 7 | |a Class G cement |2 Elsevier | |
| 650 | 7 | |a Extender |2 Elsevier | |
| 650 | 7 | |a Nanosilica |2 Elsevier | |
| 650 | 7 | |a Strength enhancement |2 Elsevier | |
| 650 | 7 | |a POFA |2 Elsevier | |
| 700 | 1 | |a Gholami, Raoof |4 oth | |
| 700 | 1 | |a Tiong, Michelle |4 oth | |
| 700 | 1 | |a Nagaratnam, Brabha |4 oth | |
| 700 | 1 | |a Sarmadivaleh, Mohammad |4 oth | |
| 700 | 1 | |a Mostofi, Masood |4 oth | |
| 700 | 1 | |a Bing, Chua Han |4 oth | |
| 700 | 1 | |a Muktadir, Golam |4 oth | |
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10.1016/j.petrol.2019.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000990.pica (DE-627)ELV046284052 (ELSEVIER)S0920-4105(19)30175-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Abid, Khizar verfasserin aut A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations 2019transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. Class G cement Elsevier Extender Elsevier Nanosilica Elsevier Strength enhancement Elsevier POFA Elsevier Gholami, Raoof oth Tiong, Michelle oth Nagaratnam, Brabha oth Sarmadivaleh, Mohammad oth Mostofi, Masood oth Bing, Chua Han oth Muktadir, Golam oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:177 year:2019 pages:79-92 extent:14 https://doi.org/10.1016/j.petrol.2019.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 177 2019 79-92 14 |
| spelling |
10.1016/j.petrol.2019.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000990.pica (DE-627)ELV046284052 (ELSEVIER)S0920-4105(19)30175-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Abid, Khizar verfasserin aut A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations 2019transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. Class G cement Elsevier Extender Elsevier Nanosilica Elsevier Strength enhancement Elsevier POFA Elsevier Gholami, Raoof oth Tiong, Michelle oth Nagaratnam, Brabha oth Sarmadivaleh, Mohammad oth Mostofi, Masood oth Bing, Chua Han oth Muktadir, Golam oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:177 year:2019 pages:79-92 extent:14 https://doi.org/10.1016/j.petrol.2019.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 177 2019 79-92 14 |
| allfields_unstemmed |
10.1016/j.petrol.2019.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000990.pica (DE-627)ELV046284052 (ELSEVIER)S0920-4105(19)30175-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Abid, Khizar verfasserin aut A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations 2019transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. Class G cement Elsevier Extender Elsevier Nanosilica Elsevier Strength enhancement Elsevier POFA Elsevier Gholami, Raoof oth Tiong, Michelle oth Nagaratnam, Brabha oth Sarmadivaleh, Mohammad oth Mostofi, Masood oth Bing, Chua Han oth Muktadir, Golam oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:177 year:2019 pages:79-92 extent:14 https://doi.org/10.1016/j.petrol.2019.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 177 2019 79-92 14 |
| allfieldsGer |
10.1016/j.petrol.2019.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000990.pica (DE-627)ELV046284052 (ELSEVIER)S0920-4105(19)30175-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Abid, Khizar verfasserin aut A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations 2019transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. Class G cement Elsevier Extender Elsevier Nanosilica Elsevier Strength enhancement Elsevier POFA Elsevier Gholami, Raoof oth Tiong, Michelle oth Nagaratnam, Brabha oth Sarmadivaleh, Mohammad oth Mostofi, Masood oth Bing, Chua Han oth Muktadir, Golam oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:177 year:2019 pages:79-92 extent:14 https://doi.org/10.1016/j.petrol.2019.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 177 2019 79-92 14 |
| allfieldsSound |
10.1016/j.petrol.2019.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000990.pica (DE-627)ELV046284052 (ELSEVIER)S0920-4105(19)30175-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Abid, Khizar verfasserin aut A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations 2019transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. Class G cement Elsevier Extender Elsevier Nanosilica Elsevier Strength enhancement Elsevier POFA Elsevier Gholami, Raoof oth Tiong, Michelle oth Nagaratnam, Brabha oth Sarmadivaleh, Mohammad oth Mostofi, Masood oth Bing, Chua Han oth Muktadir, Golam oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:177 year:2019 pages:79-92 extent:14 https://doi.org/10.1016/j.petrol.2019.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 177 2019 79-92 14 |
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Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. 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A pozzolanic supplementary material to reinforce class G cement used for drilling and completion operations |
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There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. |
| abstractGer |
There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. |
| abstract_unstemmed |
There have been many studies to improve cement integrity under different pressure and temperature conditions where cement degradation is initiated by the mechanical and chemical interactions. Several approaches were presented so far to resolve this issue, many of which are either expensive or inefficient under certain circumstances. In this paper, attempts are made to show the application of Palm Oil Fuel Ash (POFA) as a cheap but efficient supplementary cementing material (SCM) for drilling and completions practices. A series of experiments were conducted to evaluate the changes in the density, free fluid, rheology, weight on cement, compressive strength, matrix structure and composition of the cement modified by POFA. The results obtained indicated that POFA has a hydrophilic surface and can retard pozzolanic reactions. It was appeared that POFA does not significantly change the rheology but may reduce the plastic viscosity. After 24 h and 9 months of curing, 5 wt% POFA based cement appeared to have the highest compressive strength with a very consolidated matrix as observed through XRD, TGA and SEM tests. It was also revealed that nanosilica (NS) may significantly increase the plastic viscosity of the cement while POFA may give a higher strength to the cement in a long curing process. It was then concluded that POFA can be a very good choice to improve the mechanical strength and the matrix structure of the cement under different drilling conditions. |
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Gholami, Raoof Tiong, Michelle Nagaratnam, Brabha Sarmadivaleh, Mohammad Mostofi, Masood Bing, Chua Han Muktadir, Golam |
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