| 碳酸盐岩断裂相分类特征——以新疆塔里木盆地柯坪露头为例 |
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| 关键词:carbonate fault facies type reservoir Tarim basin |
| 基金项目:国家油气专项“四川、塔里木等盆地及邻区海相碳酸盐岩大油气田形成条件、关键技术及目标评价”(编号: 2008ZX05004-04) |
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| The Classification and Characteristics of Carbonate Fault Facies: A Case Study of the Outcrop of Kalpin Area, Tarim Basin in Xinjiang |
| Fault facies is a novel concept for the internal structure description and reservoir modeling of faults. Characteristics of carbonate fault facies are different from those of clastic rocks, as evidenced by the analysis of the Ordovician carbonate outcrop in Kalpin area, Tarim basin. In this paper, the fault facies of discrete structures, membranes and lenses are divided into different subtypes in the carbonate outcrop. The discrete structures of the carbonate outcrop are characterized by the development of slip surface, fracture band, and deformation band. There exist three types of slip surface, i.e., straight intercept type, curved fluctuate type and gradation band type. Fracture bands, developed in the damage zone with insignificant filling, are ideal migration channels. However, most of the fracture bands and fault cores are filled with lenses. There are three types of deformation band, i.e., cataclastic deformation band, folding deformation band, and ductile deformation band. Carbonate membranes mainly consist of different sizes of cataclasite or breccias of semi-continuous or ruptured types, with a small part of them formed by siliceous belt of continuous type or filled with sand and mud of continuous type. Many carbonate lenses are distributed in the fault cores and damage zones. There are three types of lenses, namely, un-deformed cataclasite lenses, low-deformed lenses, and deformed lenses affected by diagenesis. It is indicated that most of the fault cores are tight, but the fracture bands in the damage zone are favorable channels of hydrocarbon migration. It is necessary to deal with them separately because different grades of fault facies exert different effects on the reservoir and fluids. |
| QU Tai-lai,WU Guang-hui,LIU Jia-liang,LI Hao-wu,CHEN Zhi-yong,GAO Li.2011.The Classification and Characteristics of Carbonate Fault Facies: A Case Study of the Outcrop of Kalpin Area, Tarim Basin in Xinjiang[J].Acta Geoscientica Sinica,32(5):541-548. |
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