准噶尔盆地阜康凹陷阜东斜坡齐古组储层控制因素及有利区预测

doi:10.11743/ogg20180312

Abstract

Abstract: As the main exploration target in the Fudong slope of the Junggar Basin,the first member of the Upper Jurassic Qigu Formation was investigated.Its lithology,reservoir pore space and physical property were analyzed in lab,and controlling factors of reservoir quality were summarized.Starting from high-quality reservoir analysis,we studied the controlling factors of hydrocarbon accumulation for the Qigu 1 Member based on oil-producing well data,which ultimately enable us to predict hydrocarbon accumulation areas.And the result shows that(1)lithology of the Qigu 1 Member is mainly fine-grained clastic sandstone with high structural maturity and low compositional maturity,and reservoir space is mainly primary intergranular pores,forming a medium porosity reservoir with medium-high permeability;(2)source provenances supply materials for reservoir deposition,while sedimentary facies and palaeogeomorphology control reservoir quality distribution; both compaction and abnormal pressure determine physical properties of reservoirs,while cementation and dissolution have limited impact on reservoir property;(3)the controlling factors of hydrocarbon accumulation are mainly oil and gas migration channels and driven power,with the former involving unconformity and fault development and the latter mainly caused by abnormal pressure difference.In conclusion,we predict four favorable accumulation regions in the Qigu 1 Member of the study area.

Key words: faworable accumulation region, reservoir, Qigu Formation, Upper Jurassic, Fudong slope, Fukang Sag, Junggar Basin

CLC Number:

TE122.2

Lu Bingxiong, Wen huaguo, Dan Yong, Chen Hong, Zhu Yongcai, Yu Jingwei. Favorable accumulation region prediction and controlling factors of hydrocarbon accumulation of the Qigu Formation in the Fudong slope,Fukang Sag,Junggar Basin[J]. Oil & Gas Geology, 2018, 39(3): 549-557.

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Favorable accumulation region prediction and controlling factors of hydrocarbon accumulation of the Qigu Formation in the Fudong slope,Fukang Sag,Junggar Basin

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