4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea

Simple item page
dc.contributor.advisorKahle, Bethen_ZA
dc.contributor.advisorGidlow, Mauriceen_ZA
dc.contributor.advisorKahle, Richarden_ZA
dc.contributor.authorMsolo, Andile Luckyen_ZA
dc.date.accessioned2017-10-03T14:16:21Z
dc.date.available2017-10-03T14:16:21Z
dc.date.issued2017en_ZA
dc.description.abstract4D seismic analysis is used to understand the performance of a producing oil field in order to increase production and mitigate risk. This is done by interpreting changes in water saturation and changes in effective pressure in the reservoir, which allows production to be maximized safely. In this project, I determined saturation and pressure changes in an oil field offshore Equatorial Guinea. I used Landrø's technique as a basis for the analysis, however Landrø's technique requires the presence of reservoir samples. For this project, rock samples of the reservoir were not available; this led me to modify Landrø's methodology using approximations based on well-accepted rock physics relationships. I tested this new methodology on a synthetic model, which gave encouraging results, after which it was applied to real seismic data. Pressure and saturation changes estimated in the reservoir indicate that the northern part of the reservoir experienced a decrease in pore pressure. The saturation changes over the northern part of the reservoir are not prominent. The central and southern parts of the reservoir show an increase in water saturation accompanied by an increase in pore pressure. The results are consistent with the production and injection history of this area. A comparison between saturation before production, saturation changes after production and pressure changes after production indicates an area (on the northern part of the reservoir) which shows fluid anomalies before production and does not show any production (or 4D) effects. New production wells could potentially be drilled in this area to increase production.en_ZA
dc.identifier.apacitationMsolo, A. L. (2017). <i>4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/25501en_ZA
dc.identifier.chicagocitationMsolo, Andile Lucky. <i>"4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 2017. http://hdl.handle.net/11427/25501en_ZA
dc.identifier.citationMsolo, A. 2017. 4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Msolo, Andile Lucky AB - 4D seismic analysis is used to understand the performance of a producing oil field in order to increase production and mitigate risk. This is done by interpreting changes in water saturation and changes in effective pressure in the reservoir, which allows production to be maximized safely. In this project, I determined saturation and pressure changes in an oil field offshore Equatorial Guinea. I used Landrø's technique as a basis for the analysis, however Landrø's technique requires the presence of reservoir samples. For this project, rock samples of the reservoir were not available; this led me to modify Landrø's methodology using approximations based on well-accepted rock physics relationships. I tested this new methodology on a synthetic model, which gave encouraging results, after which it was applied to real seismic data. Pressure and saturation changes estimated in the reservoir indicate that the northern part of the reservoir experienced a decrease in pore pressure. The saturation changes over the northern part of the reservoir are not prominent. The central and southern parts of the reservoir show an increase in water saturation accompanied by an increase in pore pressure. The results are consistent with the production and injection history of this area. A comparison between saturation before production, saturation changes after production and pressure changes after production indicates an area (on the northern part of the reservoir) which shows fluid anomalies before production and does not show any production (or 4D) effects. New production wells could potentially be drilled in this area to increase production. DA - 2017 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2017 T1 - 4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea TI - 4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea UR - http://hdl.handle.net/11427/25501 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/25501
dc.identifier.vancouvercitationMsolo AL. 4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guinea. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 2017 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/25501en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Geological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherGeologyen_ZA
dc.title4D seismic analysis: discriminating between saturation and pressure changes form a data acquired Offshore Equatorial Guineaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_2017_msolo_andile_lucky.pdf
Size:
9.37 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters