页岩油甜点评价关键技术及甜点类型划分: 以玛湖凹陷二叠系风城组为例
摘要
Mahu Fengcheng Formation shale oil is a new field of oil and gas exploration in Junggar Basin.Clarifying its high-quality "sweet spot" development section is of great significance to the oil test horizon and the deployment of horizontal wells.Starting with two key geological engineering parameters in shale oil evaluation: free oil and brittleness index, and based on the systematic experimental site, in this paper it studies the logging evaluation method of free oil and brittleness index of shale oil in Mahu Fengcheng Formation, analyzes the influence of the two parameters on production, establishes the calculation model of production potential index, and forms the "sweet spot" classification method.The research shows that: (1) (T 2 , T 1 ) 2D NMR method can effectively distinguish movable water, free oil and adsorbed oil (T 1 /T 2 : movable water < free oil < adsorbed oil).The porosity of 基金项目： 中国石油天然气股份有限公司前瞻性基础性项目(No.2021DJ1803).