渝东南地区下志留统龙马溪组富有机质页岩储层裂缝分布预测  

Fracture Prediction of Organic-enriched Shale Reservoir in Lower Silurian Longmaxi Formation of Southeastern Chongqing Area

作　　者：吴礼明[1] 丁文龙[1] 张金川[1] 李玉喜[2] 赵松[1] 胡良君[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]国土资源部油气资源战略研究中心,北京100034

出　　处：《石油天然气学报》2011年第9期43-46,165-166,共4页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(41072098);全国油气资源战略选区调查与评价国家专项项目(2009GYXQ-15);中国地质大学(北京)基本科研业务费专项资金资助项目(2011PY0203)

摘　　要：渝东南地区作为上扬子区下古生界发育海相富有机质页岩主要地区之一,该区页岩气的研究已进入战略选区与评价阶段。为更好地评价渝东南地区页岩气的现实有利区和前景区提供依据,采用应力场模拟中的薄板弯曲模型趋势面分析法对该区下古生界具有海相富有机质页岩的龙马溪组地层进行裂缝发育程度和分布特征的预测,最终将裂缝有利区划分为3类:一类裂缝有利区多位于大型断裂发育区域和背斜的轴部;二类裂缝有利区多处于某些次级断裂附近和向斜的轴部;三类裂缝有利区发育带多处于背斜和向斜的两翼,以及某些构造变形较弱的小型向斜和背斜附近。As one of the main marine organic-enriched shale areas in the Lower Paleozoic of the Upper Yangtze Region,the study of shale gas of southeastern Chongqing Area entered into the period of strategic selection and evaluation.In order to provide basis for evaluating available areas and prospects of shale gas in southeastern Chongqing Area,fracture development degree and its distribution characteristics marine organic-enriched shales in Longmaxi Formation were predicted by simulating the tectonic stress fields of the strata with thin plate-bending trend surface method.The advantageous fracture areas were divided into three types,such as the best location of large fault and anticline axis,the region of secondary faults and syncline axis,on both sides of syncline and anticline,there exist some weak structural deformation regions such as small-scale syncline and anticline.

关 键 词：页岩气 裂缝 应力场模拟 渝东南地区 

分 类 号：P618.13[天文地球—矿床学]