SL地区大安寨段页岩气储层预测浅论  

Reservoir prediction for shale gas in Daan member of SL area

作　　者：文治东 胡伟光[1] 范春华[1] 刘珠江[1] 伏海蛟[1] 

机构地区：[1]中国石油化工股份有限公司 勘探南方分公司研究院,成都610041

出　　处：《物探化探计算技术》2013年第6期704-710,共7页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：SL地区大安寨段地层具有良好的页岩气成藏条件,有的井在该层段钻获工业气流,而有的井则钻遇干层或微弱产气,说明该层段的页岩气储层平面分布呈不均匀状态,资料表明该区页岩气的富集主要受泥页岩热成熟度、有机碳含量、裂缝发育和地层压力等因素控制。所以寻找该区大安寨段裂缝及有利的岩性组合是首要因素,利用三维纵波叠后地震资料,针对SL地区大安寨段页岩气储层段,采用提取瞬时振幅属性及曲率分析技术,对珍珠冲组大安寨段进行有利储层分布区域进行预测,预测结果与钻井资料吻合较好,证明这两种技术方法综合起来分析运用,具有较好的实际应用价值。The Daan formation is a good reservoir for shale gas accumulation. However, when drilling this strata mem- ber, economic gas flow as well as dry layer were obtained and such drilling results have revealed the uneven horizontal distri- bution characteristics of this layer. The enrichment of shale gas in this area is controlled by thermal maturity of shale, TOC, natural fractures and formation pressure as well. Therefore, fractures and lithologic association are of the first importance in finding drilling targets. On the basis of 3-D post-stack longitudinal wave, by analysis of curvature and instantaneous ampli- tude attribute either, the favorable zone of shale gas reservoir in Daan member of zhengzhuchong formation in SL area has been predicted. The predicting results are in good agreement with drilling data.

关 键 词：大安寨段 页岩气 瞬时振幅 曲率分析 储层预测 四川盆地 

分 类 号：P618.13[天文地球—矿床学]