摘要
四川盆地长宁地区地质构造复杂,广泛发育浅海陆棚相沉积的黑色页岩,区内龙马溪组页岩气储层表现出高自然伽马、高声波时差、高中子、低密度的测井响应特征。针对此特征,利用ECS和ELAN-PLUS测井进行矿物成分、有机碳总量、储层物性的解释评价。研究表明,该区龙马溪组中下部发育有优质页岩储层,总厚度达33.4 m,孔隙类型以基质孔隙为主,脆性矿物含量及有机碳总量较高,有开发潜力。
The geological structure of Changning area is complicated in Sichuan Basin,and the black shale in Longmaxi formation from neritic shelf is widely distributed. The geophysical characteristics of the shale gas reservoirs in Longmaxi formation are respond to high gamma ray,high interval transit time,high neutron and low density. The mineral analysis,total organic carbon content and reservoir properties analysis are interpreted based on logging interpretation model,which is integrated with ECS and ELAN- PLUN. The results show that the lower part of Longmaxi formation in the study area develops a sets of high quality black shale reservoirs and the thickness is up to33. 4 m. In this group,the matrix porosity is dominant among the pores,and the content of brittle mineral and TOC is high. As a result,the studied area has good development potential.
出处
《重庆科技学院学报（自然科学版）》
CAS
2016年第2期22-26,共5页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家自然科学基金项目"页岩油
气甜点构成要素比较研究"(41472123)
关键词
长宁地区
页岩气测井
储层物性
脆性矿物
Changning area
shale gas logging
physical property of reservoir
brittle mineral
