延安气田延513-延183井区山西组储层特征研究
发布时间：2019-04-13 08:53
【摘要】：鄂尔多斯盆地东南部延安气田延513-延183井区上古生界主力气层为山西组。本文以沉积学、储层地质学为指导,在对岩心、薄片、粒度、阴极发光、扫描电镜、物性、试气等地质资料详细分析的基础上,结合测井等物探资料,对研究区山西组山1段和山2储层特征进行了综合分析研究,在此基础上搞清了优质储层发育的主控因素,明确了研究区主要储层类型及其对气藏形成与分布的控制作用。延安气田延513-延183井区山1、山2段沉积相为曲流河三角洲前缘亚相,其微相又分为水下分流河道、河口坝和水下分流间湾。储层的岩石类型以岩屑石英砂岩、岩屑砂岩为主,石英砂岩次之,填隙物成分主要有泥质杂基、高岭石、含铁方解石以及硅质等。山1、山2储层孔隙度分别为4.94%、5.65%,渗透率分别为0.67mD、2.53mD,孔隙类型主要以溶蚀孔、粒间残余孔隙为主,还有一些微裂缝发育。综合沉积相、储层特征、孔隙结构、成岩作用、物性特征和试气结果等储层各方面因素的特征,将研究区分为四类储层,Ⅰ类为有利的储层,Ⅱ类为较有利储层,Ⅲ类为中等储层,Ⅳ类为差的储层。研究认为发育在曲流三角洲前缘砂体,粒度以中粗、粗粒为主,石英含量较高,孔隙度与渗透率相对较高,有利于发育优质储层。山1、山2段气藏的展布受储层砂体展布的控制,砂体单层厚度3m,砂层段岩性稳定,气藏发育;研究区山西组储层成岩作用阶段已达到晚期,储层的孔渗性严重降低,岩性圈闭条件更为复杂,在同一相带控制的砂体相对较发育的地区,成岩后期中相对发育建设性成岩作用(溶蚀作用),储层有效储集能力明显增大,天然气相对富集。
[Abstract]:The main upper Paleozoic gas reservoir of Yan'an gas field in the southeast of Ordos basin is Shanxi formation. Guided by sedimentology and reservoir geology, on the basis of detailed analysis of geological data, such as core, thin slice, grain size, cathodoluminescence, scanning electron microscope, physical properties and gas test, and combined with geophysical prospecting data such as well logging, Based on the comprehensive analysis and research on the reservoir characteristics of Shan-1 and Shan-2 reservoirs in Shanxi formation, the main controlling factors for the development of high-quality reservoirs are clarified, and the main reservoir types and their controlling effects on the formation and distribution of gas reservoirs in the study area are clarified. The sedimentary facies of Yan513-Yan183 well area in Yan'an gas field is subfacies of meandering river delta front, and its microfacies are divided into underwater distributary channel, estuary dam and underwater distributary bay. The rock types of reservoir are lithic quartz sandstone, lithic sandstone and quartz sandstone, and the composition of filling material is mainly argillaceous complex, kaolinite, iron-bearing calcite and siliceous, etc. The porosity and permeability of Shan-1 and Shan-2 reservoirs are 4.94%, 5.65%, 0.67mD and 2.53mD, respectively. The pore types are mainly solution pores, intergranular residual pores and some micro-fractures. Based on the characteristics of sedimentary facies, reservoir characteristics, pore structure, diagenesis, physical properties and gas test results, the study is divided into four types of reservoirs, type I is favorable reservoir and type 鈪，
本文编号：2457423
[Abstract]:The main upper Paleozoic gas reservoir of Yan'an gas field in the southeast of Ordos basin is Shanxi formation. Guided by sedimentology and reservoir geology, on the basis of detailed analysis of geological data, such as core, thin slice, grain size, cathodoluminescence, scanning electron microscope, physical properties and gas test, and combined with geophysical prospecting data such as well logging, Based on the comprehensive analysis and research on the reservoir characteristics of Shan-1 and Shan-2 reservoirs in Shanxi formation, the main controlling factors for the development of high-quality reservoirs are clarified, and the main reservoir types and their controlling effects on the formation and distribution of gas reservoirs in the study area are clarified. The sedimentary facies of Yan513-Yan183 well area in Yan'an gas field is subfacies of meandering river delta front, and its microfacies are divided into underwater distributary channel, estuary dam and underwater distributary bay. The rock types of reservoir are lithic quartz sandstone, lithic sandstone and quartz sandstone, and the composition of filling material is mainly argillaceous complex, kaolinite, iron-bearing calcite and siliceous, etc. The porosity and permeability of Shan-1 and Shan-2 reservoirs are 4.94%, 5.65%, 0.67mD and 2.53mD, respectively. The pore types are mainly solution pores, intergranular residual pores and some micro-fractures. Based on the characteristics of sedimentary facies, reservoir characteristics, pore structure, diagenesis, physical properties and gas test results, the study is divided into four types of reservoirs, type I is favorable reservoir and type 鈪，
本文编号：2457423
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