工程科学学报2016，Vol.38Issue(z1)：224-231,8.DOI:10.13374/j.issn2095-9389.2016.s1.037
盐津--珙县地区五峰组--龙马溪组页岩气富集成藏条件
Accumulation condition for Wufeng-Longmaxi Formation shale gas of Yanjin-Gongxian area
摘要
Abstract
The formation conditions of shale gas in Wufeng-Longmaxi Formation of Yanjin-Gongxian area were analyzed on the basis of field observation and experimental data, and then the main factors for shale gas accumulation were discussed. Results show that black shale at the bottom of Wufeng-Longmaxi Formation is a deep-water shelf deposit product. The dessert shale gas from the first stage of Wufeng to the fourth stage of Longmaxi was complete. The organic carbon content is between 2. 7%-6. 0%. Mainly for the high organic carbon content, the thickness of black shale rich in organic matter is 30-50 m. In the high gas horizon, nanometer organic pores and pyrite intracrystalline pores are abundant, and the average rate of porosity is 2. 28%-3. 48%, providing a good reservoir space for the adsorbed gas and free gas. Structural strength in the research area is weak and large faults are less. There are good condi-tions of roof and floor. The pressure coefficient is more than 1, which reflects the suitable preservation condition. The main factors for shale gas accumulation are as follows:deep shelf sedimentary environment, high organic carbon content, abundant nanometer pores,high level porosity, and high pressure coefficient.关键词
盐津-珙县地区/五峰组-龙马溪组/成藏条件/主控因素Key words
Yanjin-Gongxian area/Wufeng-Longmaxi formation/accumulation condition/main controlling factors分类
能源科技引用本文复制引用
梁萍萍,王红岩,赵群,张琴,王南,肖前华..盐津--珙县地区五峰组--龙马溪组页岩气富集成藏条件[J].工程科学学报,2016,38(z1):224-231,8.基金项目
国家重点基础研究发展计划(973)项目“中国南方海相页岩气高效开发的基础研究”(2013CB228000) （973）
国家“十二五”重大专项“页岩气勘探开发关键技术”项目(2011ZX05018) （2011ZX05018）
