鄂南镇泾地区延长组油气富集主控因素及勘探方向

doi:10.11743/ogg20120201

Abstract

Abstract:

Through analyzing the relations between petroleum discoveries and distributions of the favorable facies zones,local structures,faults and fractures,this paper studied the main factors controlling hydrocarbon accumulation in combinition with statistical analysis of the relationship between formation test data and sand thickness,reservoir property and logging data.The results show that favorable sedimentary microfacies zones,local structural setting,and faults & fractures are the three major factors controlling hydrocarbon accumulation.Hydrocarbon mainly accumulate in the underwater distributary channel sands of the delta front.The high of NW-SE-trending broad nose structure is the favorable place for hydrocarbon accumulation.The vertical and high-angle heterotropic fractures are the main effective factures in the study area.Faults and fractures control hydrocarbon accumulation.The discovered pools with a great amount of reserves are mainly distributed near the F₂ and F₃ fault zones with large fault displacement.The sandbodies of underwater distributary channel subfacies with well-developed faults and fractures in the local nose structures in the southeastern part of the study area are the the most favorable targets for further exploration.

Key words: fault, favorable facies zone, tectonic setting, hydrocarbon accumulation, Yanchang Formation, Triassic, Zhenjing area, Ordos Basin

CLC Number:

TE122.1

Yin Wei, Zheng Herong, Hu Zongquan, Liu Zhen, Shang Xiaofei. Main factors controlling hydrocarbon accumulation and favorable exploration targets for the Yanchang Formation in Zhenjing area,south Ordos Basin[J]. Oil & Gas Geology, 2012, 33(2): 159-165.

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Main factors controlling hydrocarbon accumulation and favorable exploration targets for the Yanchang Formation in Zhenjing area,south Ordos Basin

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