摘要
通过研究四川盆地三叠系碳酸盐岩和暗色泥质烃源岩的地化特征,认为上三叠统烃源岩有机碳丰度普遍较高,有机质类型以Ⅲ型为主,达到了成熟到过成熟热演化阶段。中下三叠统烃源岩有机质丰度较低,但有机质类型好,主要为腐泥型,目前处于成熟—过成熟阶段。对烃源岩定量评价及资源潜力进一步分析,预测四川盆地三叠系天然气潜在资源量及资源丰度都相对较高,储集条件好,具备形成有效气田的条件。
A research on the geochemical behavior of Triassic carbonate rock and dark argillaceous source rock in Sichuan Basin was implemented.Results show that:(1)for the Upper Triassic source rock,the organic carbon has relative higher abundance,the organic-matter type is mainly III,and it is almost in overmature thermal evolution stage;and(2)for the Middle to Lower Triassic source rock,the organic matter has a lower abundance,the organic-matter type is good and mainly sapropelic,and it is in mature to overmature stage.Moreover,it is predicted from quantitative evaluation on source rock and analysis on resource potential that for the Triassic gas reservoirs in Sichuan Basin,there are relative higher resource potential and abundance,and good reservoir conditions.
出处
《天然气勘探与开发》
2014年第3期14-18,2-3,共5页
Natural Gas Exploration and Development
关键词
三叠系
烃源条件
生烃强度
资源潜力
Triassic,source-rock condition,hydrocarbon-generating intensity,resource potential
