HYDROCARBON ACCUMULATION IN SOUTH LOKICHAR BASIN, EASTERN BRANCH OF EAST AFRICAN RIFT SYSTEM

Shen JIA; Chunguang QIU; Bin HU; Wei ZHAO; Jingtan CHEN

doi:10.16028/j.1009-2722.2018.04005

2018 Vol. 34, No. 4

Article Contents

Article navigation > Marine Geology Frontiers > 2018 > 34(4): 33-40

Next Article Previous Article

Shen JIA, Chunguang QIU, Bin HU, Wei ZHAO, Jingtan CHEN. HYDROCARBON ACCUMULATION IN SOUTH LOKICHAR BASIN, EASTERN BRANCH OF EAST AFRICAN RIFT SYSTEM[J]. Marine Geology Frontiers, 2018, 34(4): 33-40. doi: 10.16028/j.1009-2722.2018.04005

Citation:

Shen JIA, Chunguang QIU, Bin HU, Wei ZHAO, Jingtan CHEN. HYDROCARBON ACCUMULATION IN SOUTH LOKICHAR BASIN, EASTERN BRANCH OF EAST AFRICAN RIFT SYSTEM[J]. Marine Geology Frontiers, 2018, 34(4): 33-40. doi: 10.16028/j.1009-2722.2018.04005

HYDROCARBON ACCUMULATION IN SOUTH LOKICHAR BASIN, EASTERN BRANCH OF EAST AFRICAN RIFT SYSTEM

1.
CNOOC Research Institute, Beijing 100028, China
2.
International Co. Ltd, CNOOC, Beijing 100027, China

Received Date: 28 October 2017

Abstract

Abstract

The eastern branch of the East African Rift System is composed of several basins. It remains low in hydrocarbon exploration degree and only in the South Lokichar basin there are oil discoveries. The paper is to analyze the geological conditions for hydrocarbon accumulation in the South Lokichar basin with drilling, seismic and laboratory data. The study shows that the South Lokichar Basin has favorable conditions for oil and gas accumulation. Both of the Lower Auwerwer Formation and the Lokhone Shale Formation have oil accumulations being found and the former is the main exploration target. The western steep slope zone is the main hydrocarbon accumulation zone, in which both of the exploration targets have oil discoveries. Reservoir is the main factor affecting oil and gas accumulation and net pay thickness. The eastern gentle zone has little discovery until now, in which the main exploration target, the Lower Auwerwer Formation, has nothing discovered yet and poor lateral sealing is proposed as the main factor.
- South Lokichar Basin /
- hydrocarbon geological conditions /
- hydrocarbon enrichment characteristics /
- accumulation pattern /
- African Rift

FullText(HTML)

References

[1]	温志新, 童晓光, 张光亚, 等.东非裂谷系盆地群石油地质特征及勘探潜力[J].中国石油勘探, 2012, 17(4):60-65. doi: 10.3969/j.issn.1672-7703.2012.04.010 CrossRef Google Scholar
[2]	Kreuser T. Rift to drift evolution in Permian-Jurassic basins of East Africa[J]. Geological Society London Special Publications, 1995, 80(1):297-315. doi: 10.1144/GSL.SP.1995.080.01.14 CrossRef Google Scholar
[3]	Chorowicz J. The East African rift system[J]. Journal of African Earth Sciences, 2005, 43(1):379-410. doi: 10.1016/j.jafrearsci.2005.07.019 CrossRef Google Scholar
[4]	徐宁, 张杰, 史卜庆, 等.红海盆地石油地质特征及其油气勘探潜力[J].地学前缘, 2014, 21(3):155-165. Google Scholar
[5]	金宠, 陈安清, 楼章华, 等.东非构造演化与油气成藏规律初探[J].吉林大学学报:地球科学版, 2012, 42(2):121-130. Google Scholar
[6]	Tatsumi Y, Kimura N. Secular variation of basalt chemistry in the Kenya Rift: Evidence for the pulsing of asthenospheric upwelling[J]. Earth & Planetary Science Letters, 1991, 104(1):99-113. Google Scholar
[7]	Mechle J, Keller G R, Prodehlc C, et al. A model for the structure, composition and evolution of the Kenya rift[J]. Tectonophysics, 1997, 278(1/4):95-119. Google Scholar
[8]	Morley C K, Wescott W A, Stone D M, et al. Tectonic evolution of the northern Kenya Rift[J]. Journal of the Geological Society, 1992, 149(3):333-348. doi: 10.1144/gsjgs.149.3.0333 CrossRef Google Scholar
[9]	Smith M. Stratigraphic and structural constraints on mechanisms of active rifting in the Gregory Rift, Kenya[J]. Tectonophysics, 1994, 236(1/4):3-22. Google Scholar
[10]	Macgregor D. History of the development of the East African Rift System: A series of interpreted maps through time[J]. Journal of African Earth Sciences, 2015, 101(1):232-252. doi: 10.1016/j.jafrearsci.2014.09.016 CrossRef Google Scholar
[11]	姜在兴.沉积学[M].北京:石油工业出版社, 2001:270-398. Google Scholar