陕北盆地姬塬地区长4+5砂岩储层物性控制因素分析  

The discussion of reservior characteristics and control factors of Chang 4+5 of Jiyuan region,Shanbei basin

作　　者：柳博莹 张儒[1] 

机构地区：[1]西安石油大学,陕西西安710065

出　　处：《石油化工应用》2015年第12期66-69,共4页Petrochemical Industry Application

基　　金：中国石油长庆油田第五采油厂科研项目"姬塬油田长4+5以上油藏富集特征及开发目标优选"部分成果

摘　　要：鄂尔多斯盆地姬塬油田延长组长4+5储集岩经历了诸多成岩作用,具有低孔低渗的特点,通过对岩石铸体薄片实验分析、X射线分析、电镜扫描分析等多种实验手段,对研究区延长组长4+5油层组储层的岩性组分、物理特性以及储层物性演化进行了研究。结合物性分析实验和对裂缝孔隙及其填充物的分析,进行储层物性控制因素探讨,得出姬塬油田延长组长4+5砂岩储层物性主要受沉积相和成岩作用控制。研究区以水下分流河道微相控制的储层物性最好,成岩作用对储层物性起改造作用,破坏性成岩作用(压实,胶结等)使储层物性变差,溶蚀作用(主要是长石溶蚀)对储层物性具有良好的改造作用,进行储层物性控制因素分析,对姬塬地区的地质认识和进一步精细开发有重要意义。The Chang 4 ＋5 reservoir of Yanchang group in Jiyuan oilfield, Ordos basin, has experienced a lot of diagenesis, the Chang 4＋5 reservoir be-longs to typical low porosity and extra-low permeability reservoir. Cast thin section, scanning electron microscope, cast image analysis, cathodoluminescence,high-pressuremercury injection, and physicalproperty data,etc. Combined with physical analysis experiments and analysis of fracture pore and filler,discussing the control factors for reservoir physical property. Show that the characteristics of the reservoir is influenced by the interaction of sedimentary facies and diagenesis. Sedimentary facies is the basic factorofcontrolling the finaldistribution and characteristics of the reservoir. The underwaterdistributary channel in delta fronts is the favorable sedimentary environment for the formation and development of the reservoir. Diagenesis plays dominant role to the property of the reservoir. Compaction and cementationmainly lead to tight reservoir and poor reservoir property, while dissolution, especially feldspar dissolution makes the property of the reservoir better.

关 键 词：姬塬油田 成岩作用 储层物性 储层特征 沉积相 

分 类 号：P618.13[天文地球—矿床学]