川中李渡—白庙地区大安寨段湖相碳酸盐岩油藏裂缝发育特征分析  

Analysis of the fracture characteristics of lacustrine carbonates-reservoir of Da'anzai segment in Lidu-Baimiao area,middle Sichuan

作　　者：何冰[1] 胡明[1] 罗玉宏[2] 邓海波[2] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]中国石油天然气股份有限公司西南油气田分公司,四川遂宁629000

出　　处：《复杂油气藏》2010年第1期23-27,共5页Complex Hydrocarbon Reservoirs

摘　　要：四川中部李渡—白庙地区大安寨段油藏是典型的湖相碳酸盐岩裂缝型油气藏,属于特殊油气藏。通过构造特征剖析,结合钻井、岩石薄片分析化验等资料对裂缝发育特征及分布规律进行了分析研究。结果表明,研究区以低角度和水平缝为主,以未充填—半充填为特征,裂缝发育和分布受介壳灰岩泥质含量的高低、介壳排列的定向性、岩层厚度,以及局部受力强弱控制,且区域构造力还对裂缝的改造起着重要的作用。本文对提高湖相碳酸盐岩裂缝预测精度和提高此类油藏勘探开发水平有具参考意义。The reservoir of Da＇ anzai segment in Lidu - Baimiao area, middle Sichuan, is a typical lacustrine carbonates fractured - reservoir. Based on the analysis of structure features, in combination with drilling data and chemical analysis of core rock slices, this paper analyzed the development features and distribution rules of the fractures. Results was shown that the fractures are mainly low - angle and horizontal fractures with unfilled and half - filled. The development and distribu- tion of the fractures were controlled by shale content in shell limestone, the directionality of shell, rock thickness and the local stress. The regional tectonic forces played an important role in the reformation of the fractures. The analysis has a ref- erence value to improve the prediction accuracy of lacustrine carbonate fracture and the level of such reservoir exploration and development.

关 键 词：湖相 碳酸盐 裂缝类型 构造特征 介壳灰岩 大安寨段 四川中部李渡-白庙地区 

分 类 号：TE122.23[石油与天然气工程—油气勘探]