摘要
【目的】四川盆地须家河组烃源岩是川西坳陷中的主力烃源岩层位,同时也是该地区致密气的主要来源。本文对四川盆地须家河组不同沉积环境中的烃源岩进行研究,以期对后续开发提供指导性意见。【方法】川西南地区须家河组不同沉积相烃源岩总有机碳含量(TOC)各异,基于烃源岩测井参数与TOC的相关关系,利用SPSS软件对多个测井参数进行多元线性回归。【结果】研究得出了须家河组不同沉积相烃源岩的测井参数-TOC计算模型。川西南地区烃源岩纵向集中在须一、须三、须四、须五及须六段地层中;陆相烃源岩TOC平均值含量高于过渡相烃源岩;过渡相烃源岩TOC由西向东逐渐降低直至消失;须一、须三、须四、须五及须六段烃源岩TOC由研究区中心向边缘递减。【结论】研究结果为研究区内的油气成藏及主控因素提供了明确的理论依据,具有较高的借鉴价值。
[Purposes]The source rocks of Xujiahe Formation in Sichuan Basin are the main source rocks in the western Sichuan Depression and the main source of tight gas in this area.In this paper,the source rocks in different sedimentary environments of Xujiahe Formation in Sichuan Basin are studied in detail,in order to provide guidance for the follow-up development.[Methods]The total organic carbon content(TOC)of source rocks in different sedimentary facies of Xujiahe Formation in southwestern Sichuan is different.Based on the correlation between logging parameters of source rocks and TOC,multiple linear regressions of multiple logging parameters were performed using SPSS software.[Findings]The log parameters-TOC calculation model of source rocks of different sedimentary facies in Xujiahe Formation was obtained.[Conclusions]The source rocks in southwest Sichuan are concentrated longitudinally in T_(3)x^(1),T_(3)x^(3),T_(3)x^(4),T_(3)x^(5) and T_(3)x^(6) formations.The mean TOC content of continental source rocks is higher than that of transitional source rocks.TOC of transitional source rocks gradually decreases from west to east and then disappears.The TOC of source rocks in T_(3)x^(1),T_(3)x^(3),T_(3)x^(4),T_(3)x^(5) and T_(3)x^(6) decreased from the center of the study area to the edge.[Conclusions]The research results provide a clear theoretical basis for oil and gas accumulation and main controlling factors in the study area,and have high reference value.
作者
武雪婷
陈世加
徐坤
李晨
WU Xueting;CHEN Shijia;XU Kun;LI Chen(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Natural Gas Geology Key Laboratory of Sichuan Province,Southwest Petroleum University,Chengdu 610500,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China)
出处
《河南科技》
2023年第17期60-63,共4页
Henan Science and Technology
