麻黄山地区延安组、延长组储层裂缝特征及识别

doi:10.3969/j.issn.1673-8926.2009.04.010

Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (4): 53-57.doi: 10.3969/j.issn.1673-8926.2009.04.010

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Fracture identification of reservoir of Yan’an and Yanchang Formation in Mahuangshan area

ZHANG Juan¹， ZHOU Wen¹， DENG Hucheng¹，WANG Xu¹， LV Jing²

（1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Chengdu University of Technology， Chengdu 610059， China； 2. The 1st Oil Production Factory， Northwest Subsidiary Company， SINOPEC， Luntai 841600， China

Online:2009-12-16 Published:2009-12-16

Abstract

Abstract:

Yan’an Formation and Yanchang Formation in Mahuangshan region of southern Ordos Basin are typical sandstone reservoirs with low permeability and low porosity. The fractures are the major filtration passages in the reservoirs and they have close relationship with the result of exploitation and the formation of the reservoir. Therefore, the characteristics and the identifications of the fracture are the key research work to the evaluation of the reservoir in this area. At present, the applications of new logging technique can identify fractures effectively, but they are always confined by the limitation of lacking data, and cannot be used in a large scale. The study starts fromthe fractures in the core, analyses the behaviour character of normal logging curve of the fractures in the reservoir, identifies the fractures by stepwise discriminant analysis, and builds up the fracture discriminant model according to the core and log parameters. Through the examination of coring samples and actual application, this model has a good effect.

Key words: diagenesis, pore evolution, the first member of Shahejie Formation, Qikou Sag

ZHANG Juan，ZHOU Wen，DENG Hucheng，WANG Xu，LV Jing. Fracture identification of reservoir of Yan’an and Yanchang Formation in Mahuangshan area[J].Lithologic Reservoirs, 2009, 21(4): 53-57.

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