四川盆地侏罗系致密油形成条件、资源潜力与甜点区预测

发布时间：2018-06-14 15:44

  本文选题：致密油 + 形成条件　； 参考：《石油学报》2017年07期

【摘要】：通过大量岩心、岩屑和原油样品测试分析,结合456口井的生产动态数据,明确了四川盆地侏罗系4套主要烃源岩的生烃潜力和3套主力产层的成藏特征,指出凉高山组、大安寨段和东岳庙段烃源岩以生油为主,珍珠冲段烃源岩以生气为主,富有机质烃源岩控制致密油甜点分布,工业油井绝大多数位于TOC1.2%的优质烃源岩区,微米级孔喉是致密油有效储集空间,裂缝是开采初期高产的关键。四川盆地侏罗系致密油整体呈现油质轻、气油比高、异常高压的特点,有利于致密油流动和产出。采用小面元法、资源丰度类比法、EUR类比法和有机碳法4种方法,评价四川盆地侏罗系致密油地质资源量在(20~30)×10~8t。通过资源富集主控因素分析,建立了四川盆地致密油地质资源评价分级标准,运用小面元法计算Ⅰ类地质资源量为16.11×10~8t,Ⅱ类地质资源量为4.77×10~8t,Ⅲ类地质资源量为2.89×10~8t。预测大安寨段在南充—遂宁一带及梁平以东勘探潜力最大,凉高山组在广安—南充—遂宁—仪陇一带最为有利,东岳庙段在广安—遂宁一线以南具有较好的勘探前景。
[Abstract]:Through the testing and analysis of a large number of cores, cuttings and crude oil samples, combined with the production dynamic data of 456 wells, the hydrocarbon generation potential of 4 sets of main hydrocarbon source rocks of Jurassic system in Sichuan Basin and the reservoir forming characteristics of three main production zones are determined, and the Liangshan formation is pointed out. The source rocks in the Da'anzhai and Dongyumiao sections are mainly oil source rocks, while the source rocks in the Zhuzhulong formation are mainly gas generating rocks. The organic matter rich source rocks control the distribution of dense oil desserts. Most of the industrial oil wells are located in the high quality source rock area of TOC 1.2%. The micrometer pore throat is the effective reservoir space of dense oil, and the crack is the key to high production in the early stage of exploitation. The whole dense oil of Jurassic in Sichuan basin is characterized by light oil quality, high gas-oil ratio and abnormal high pressure, which is favorable for tight oil flow and production. Using four methods, small area method, resource abundance analogy method, EUR analogy method and organic carbon method, the geological resources of dense oil of Jurassic in Sichuan Basin are evaluated at 20 ~ 30) 脳 10 ~ (8) t. Based on the analysis of the main controlling factors of resource enrichment, the evaluation and classification criteria of dense oil geological resources in Sichuan Basin are established. By using the small panel method, the geological resources of class 鈪，

本文编号：2017986