A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa

Simple item page
dc.contributor.advisorKahle, Bethen_ZA
dc.contributor.authorNtombela, Nondumisoen_ZA
dc.date.accessioned2018-04-24T13:56:24Z
dc.date.available2018-04-24T13:56:24Z
dc.date.issued2018en_ZA
dc.description.abstractA three dimensional fault seal analysis study of the AK fault situated offshore of the West Coast of South Africa is presented. This study is aimed at informing the development plan of the Ibhubesi gas field with regards to the compartmentalization of the reservoirs, by understanding whether a key fault, the AK fault facilitates hydrocarbon migration to the Ibhubesi field reservoirs or whether it provides a seal. In order to address this research aim, a seismic interpretation of the area was carried out and combined with an interpretation of well data to construct a 3D structural model from which the fault seal analysis was carried out. Juxtaposition analysis was used to determine the lithologies that had been juxtaposed across the fault. Fault clay was determined using the Shale Gouge Ratio (SGR) algorithm and permeability and threshold pressure were also used to quantify the fault seal capacity. The results from the SGR were correlated to the across fault pressure difference and plotted on a reference diagram which is a comparison of sealing faults vs. leaking faults. This diagram indicates that faults with an SGR greater than 25% and threshold pressures greater than 8bars, have a high potential to seal. The AK fault SGR results range between 25 and 55 % with a threshold pressure of up to 20bars. These results indicate that the AK fault is likely to be a sealing fault.en_ZA
dc.identifier.apacitationNtombela, N. (2018). <i>A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/27833en_ZA
dc.identifier.chicagocitationNtombela, Nondumiso. <i>"A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 2018. http://hdl.handle.net/11427/27833en_ZA
dc.identifier.citationNtombela, N. 2018. A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Ntombela, Nondumiso AB - A three dimensional fault seal analysis study of the AK fault situated offshore of the West Coast of South Africa is presented. This study is aimed at informing the development plan of the Ibhubesi gas field with regards to the compartmentalization of the reservoirs, by understanding whether a key fault, the AK fault facilitates hydrocarbon migration to the Ibhubesi field reservoirs or whether it provides a seal. In order to address this research aim, a seismic interpretation of the area was carried out and combined with an interpretation of well data to construct a 3D structural model from which the fault seal analysis was carried out. Juxtaposition analysis was used to determine the lithologies that had been juxtaposed across the fault. Fault clay was determined using the Shale Gouge Ratio (SGR) algorithm and permeability and threshold pressure were also used to quantify the fault seal capacity. The results from the SGR were correlated to the across fault pressure difference and plotted on a reference diagram which is a comparison of sealing faults vs. leaking faults. This diagram indicates that faults with an SGR greater than 25% and threshold pressures greater than 8bars, have a high potential to seal. The AK fault SGR results range between 25 and 55 % with a threshold pressure of up to 20bars. These results indicate that the AK fault is likely to be a sealing fault. DA - 2018 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2018 T1 - A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa TI - A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa UR - http://hdl.handle.net/11427/27833 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/27833
dc.identifier.vancouvercitationNtombela N. A 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 2018 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/27833en_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.titleA 3D fault seal analysis study conducted in the Ibhubesi Gas Field Offshore the West Coast of South Africaen_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_2018_ntombela_nondumiso.pdf
Size:
11.4 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters