论文部分内容阅读
以沉积学和石油地质学为理论指导,在总结前人研究成果基础之上,结合测井资料和钻井取心资料,进行室内描述和薄片分析,深入系统地研究了临汾西部地区山西组和下石盒子组盒8段的沉积砂体与沉积微相展布特征。研究认为:研究区山西组和下石盒子组盒8段主要发育辫状河三角洲—湖泊沉积相,并细分为3个亚相8个微相,三角洲前缘亚相是沉积主体;山2段的渗透率和试气效果明显高于山1段和盒8段;水下分流河道微相的储集物性好于河口砂坝微相。研究区山2段水下分流河道微相是下步油气开发的最有利相带。该研究为临汾致密砂岩气藏有利探区的优选提供了一定的指导作用。
Based on the theory of sedimentology and petroleum geology, based on the conclusion of previous research results, combined with logging data and drilling coring data, the interior description and thin slice analysis were conducted, and the Shanxi group in the western part of Linfen Characteristics of sedimentary microfacies and sedimentary microfacies in Block 8 of Shihezi Formation. The study shows that the braided river delta-lake sedimentary facies is mainly developed in Shanxi Formation and Xiashihezi Formation in Member 8 of the study area and is subdivided into 3 subfacies and 8 microfacies, and the delta front subfacies are the sedimentary bodies. The permeability and gas test results of the section are obviously higher than those of section 1 and box 8. The reservoir properties of the underwater distributary channel microfacies are better than the estuary sand bar microfacies. The submarine distributary channel microfacies in Shan 2 section of the study area are the most favorable facies belts in the next step. The study provides some guidance for the optimization of favorable exploration area in Linfen tight sandstone gas reservoirs.