海相油气地质2017，Vol.22Issue(2)：25-30,6.DOI:10.3969/j.issn.1672-9854.2017.02.004
四川盆地东南缘丁山地区 页岩气成藏富集的关键控制因素
Key Factors of Shale Gas Accumulation in Dingshan Area of Southeastern Sichuan Basin
摘要
Abstract
There are significant differences in the total gas content measured in high-quality shale section (TOC≥2.0%) of the Upper Ordovician Wufeng Formation and the Lower Silurian Longmaxi Formation in the Dingshan area of southeastern Sichuan Province. The average gas content of well DY1 is 3.07m3/t, and the average gas content of DY2 is 6.79m3/t. In the study area, the source conditions of the high-quality shale are similar: the total thickness in the early stage of Wufeng Formation-Longmaxi Formation is relatively large, usually between 30m and 35.5m; the average TOC of the shale is almost 3.42%~3.95%; shale thermal evolution is moderate, Ro value is generally greater than 2.0%. The comprehensive study suggests that the preservation conditions are the key factors that contribute to the difference in gas content of shale in Dingshan area. The deep buried area, where is far away from Qiyueshan Fault, is a favorable zone for shale gas reservoirs. While in the area close to Qiyueshan Fault, the shale gas is relatively poor because the lateral dissipation of shale gas is more serious, due to the high angle fractures and the shallow burial of the shale.关键词
四川盆地/五峰组/龙马溪组/页岩气/油气成藏/油气富集Key words
Wufeng Fm./Longmaxi Fm./Shale gas/Hydrocarbon accumulation/Sichuan Basin分类
能源科技引用本文复制引用
黄仁春,魏祥峰,王强..四川盆地东南缘丁山地区 页岩气成藏富集的关键控制因素[J].海相油气地质,2017,22(2):25-30,6.基金项目
本文受中国石油化工股份公司科技部项目"川渝地区海相优质页岩气层形成主控因素及预测技术研究"(编号:P15074)资助 （编号:P15074）
