西南石油大学学报（自然科学版）2023，Vol.45Issue(6)：43-56,14.DOI:10.11885/j.issn.1674-5086.2021.11.29.02
川东南涪陵地区凉高山组湖相页岩生烃潜力评价
Evaluation of Hydrocarbon Generation Potential of Lacustrine Shale of Lianggaoshan Formation in Fuling Area,Southeastern Sichuan
摘要
Abstract
In order to ascertain the hydrocarbon generation potential of the lacustrine shale of Lianggaoshan Formation in Fuling Area of southeastern Sichuan,geochemical test and analyses were done to more than 400 samples of Lianggaoshan Formation from more than 10 oil-bearing shale wells in this area.The research results show that Lower Liang-2 Member and Upper Liang-1 Member have the highest abundance of organic matter,with average TOC contents of 1.57％and 0.81％respectively,the hydrocarbon generation potential(S1+S2)of rock pyrolysis is 2.63～5.59 mg/g,and the major type of kerogen are Ⅱ1 and Ⅱ2.The reflectivity of the vitrinite of lacustrine shale is between 0.98％and 1.46％,which has the characteristics of mature to highly mature evolution.Based on the geochemical characteristics of the lacustrine organic matter in Lianggaoshan Formation,three different kerogen hydrocarbon generation kinetic models were established with reference to the principle of volume dynamics,which effectively restored the hydrocarbon generation and expulsion history of the mud shale in Lianggaoshan Formation in Fuling Area.The simulation results show that the hydrocarbon generation conversion rate of the mud shale of Lianggaoshan Formation in Fuling Area is 65.0％～98.2％,the hydrocarbon generation evolution process has a"single peak"characteristic,and the maximum hydrocarbon production rate is 5.15～18.50 mg/(g·Ma).The total hydrocarbon generation volume is 630 000 to 1 440 000t.The hydrocarbon generation potential of source rocks is controlled by the sedimentary environment:from lake-side lakes to shallow lakes to semi-deep lakes,the hydrocarbon generation conversion rate,the maximum hydrocarbon production rate and the total amount of hydrocarbon generation show a gradual increase trend,of which semi-deep lake facies shale is the highest quality source rock in Fuling Area,which is mostly distributed in the area of TL7-YXl-TY1,and is the most favorable continental shale oil enrichment area in this area.关键词
湖相页岩/地球化学特征/生排烃史/凉高山组/生烃潜力/涪陵地区Key words
lacustrine shale/geochemical characteristics/history of hydrocarbon generation and expulsion/Lianggaoshan For-mation/hydrocarbon potential/Fuling Area分类
能源科技引用本文复制引用
李斌,吉鑫,彭军,张昆,魏祥峰..川东南涪陵地区凉高山组湖相页岩生烃潜力评价[J].西南石油大学学报（自然科学版）,2023,45(6):43-56,14.基金项目
四川省区域创新合作项目(21QYCX0050) （21QYCX0050）
