Reservoir features and exploration potential of the 1st member of Shaximiao Formation of Middle Jurassic in central Sichuan Basin

doi:10.3969/j.issn.1672-7703.2017.02.005

Abstract

Abstract: In recent years, PetroChina Southwest Oil & Gas Field Company has successfully applied the horizontal well volume fracturing technology in tight sandstone reservoir in the 1^st member of Shaximiao Formation ("Sha 1 Member") of Middle Jurassic to promote the exploration and development of tight sandstone oil and gas. Taking the Sha 1 Member reservoir in Gongshanmiao area (which has the best exploration and development benefts) as an example, according to the research approach of tight oil and gas and the source-reservoir confguration, the Sha 1 Member reservoir is divided into two types of exploration and development domains: (1) tight oil and gas in sheet sandstones at the bottom; and (2) conventional distal oil and gas in channel sandstones in the middle-lower parts. According to comprehensive analysis, the sheet sandstones at the bottom of the Sha 1 Member have better hydrocarbon accumulation conditions than the channel sandstones. Controlled by sedimentary microfacies, such sheet sandstones are thin, but they are widely distributed with better physical properties, superior source-reservoir confguration, high oil and gas flling degree and large hydrocarbon-bearing area. Thus, these sheet sandstones are worthy of large-scale benefcial development by the horizontal well volume fracturing technology.

Key words: Gongshanmiao, Sha 1 Member, central Sichuan Basin, horizontal well volume fracturing, source-reservoir confguration, oil and gas domain

CLC Number:

TE112

Huang Dong, LiYucong, Liu Min, Yang Jiajing, Bai Rong, Yang Zhi. Reservoir features and exploration potential of the 1^st member of Shaximiao Formation of Middle Jurassic in central Sichuan Basin[J]. China Petroleum Exploration, 2017, 22(2): 44-49.

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Reservoir features and exploration potential of the 1^st member of Shaximiao Formation of Middle Jurassic in central Sichuan Basin

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