西南石油大学学报（自然科学版）2024，Vol.46Issue(2)：15-25,11.DOI:10.11885/j.issn.1674-5086.2022.06.08.03
川中大安寨段页岩排烃效率及其勘探启示
Hydrocarbon Expulsion Efficiency of Shale in the Da'anzhai Member of Central Sichuan Basin and Its Exploration Enlightenment
摘要
Abstract
The hydrocarbon expulsion efficiency of source rock is an important parameter in petroleum resources assessment.The study of hydrocarbon expulsion efficiency can not only guide the resource evaluation,but also be an important scientific means to verify the reliability of the resource evaluation results.To remedy the defects of current hydrocarbon generation potential method,an improved hydrocarbon generation potential method is proposed,and the hydrocarbon expulsion efficiency of shale in the Jurassic Da'anzhai Member of central Sichuan Basin was obtained by using this method.The results show that under the current geological conditions,the hydrocarbon expulsion efficiency of the shale in the Da'anzhai Member is distributed between 0～62.6％.With the increase of organic matter maturity,the hydrocarbon expulsion efficiency gradually increases,and the oil saturation index increases first and then decreases.When Ro is in the range of 0.95％～1.72％,oil saturation index is greater than 100 mg/g,and the movable hydrocarbon content of shale strata is higher.The lithofacies combination has a significant effect on the hydrocarbon expulsion efficiency.In the longitudinal direction,there is a tendency for shale to expel hydrocarbon from shell limestone,the development of interlayer fractures in interbedded combinations is conducive to shale oil flow and production.It is concluded that the interbedded assemblage in the lower part of the first submember in the area with Ro＞1.25％is the key exploration target for shale oil in the Da'anzhai Member.The results can provide theoretical guidance for the exploration and development of shale oil in the Jurassic Da'anzhai Member of central Sichuan Basin.关键词
四川盆地/大安寨段/页岩油/排烃效率/生烃潜力法Key words
Sichuan Basin/Da'anzhai Member/shale oil/expulsion efficiency/hydrocarbon generation potential method分类
能源科技引用本文复制引用
张本健,路俊刚,张芮,蒋奇君,肖正录..川中大安寨段页岩排烃效率及其勘探启示[J].西南石油大学学报（自然科学版）,2024,46(2):15-25,11.基金项目
中国石油-西南石油大学创新联合体科技合作项目(2020CX050000) （2020CX050000）
