长岭气田登娄库组储层微观特征研究  

Petrology Characteristic Study for Reservoir in the Denglouku Formation of Changling Gasfield

作　　者：李建霆[1] 代金友[2] 李子龙 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]长庆油田公司第二采油厂,甘肃庆阳745100

出　　处：《内蒙古石油化工》2015年第20期102-105,共4页Inner Mongolia Petrochemical Industry

基　　金：国家重大专项"复杂油气田地质与提高采收率技术"(2008ZX05009-004-03)

摘　　要：利用薄片鉴定、粒度分析和多种测试资料对长岭气田登娄库组储层微观岩石学特征和孔隙结构进行系统研究,表明储集砂岩整体石英含量低(34.6%)、岩屑含量高(38.9%)、长石含量较高(26.5%),岩性为长石岩屑砂岩,成分成熟度低;岩石颗粒以次棱-次圆角状为主,分选较好,结构成熟度中等;填隙物平均含量为6.9%,胶结物主要为硅质和钙铁质胶结,杂基以泥质为主;储集空间为粒间溶孔~粒内溶孔~泥质微孔组合,溶孔发育、孔喉连通性差,孔喉组合为细孔-小微喉型。岩石成分成熟度低、胶结类型致密、填隙物含量高以及强烈的后生成岩改造作用是导致储层致密的主要原因。研究成果深化了储层认识,对指导后续储层沉积成岩特征分析及油田开发选区有实际意义。With the system study by using thin section identification method,screen analysis,and multiple test data to the microscopic petrography feature and pore structure of the Reservoir in Changling gas field Denglouku formation demonstrate that,the content of the sandstone reservoir is low in quartz(34.6%),high in lithic(38.9%)and feldspar(26.5%),and the mainly rock type is detrital feldspar.Most of the rock particles is second edge-times rounded shape,good in sorting and medium in textural maturity;there is 6.9% average content of the interstitial material,and the siliceous and the calcium iron are the key components of cementing material with the argillaceous as the majority of matrix.There are three types of reservoir pores,intergranular dissolved pore,intragranular dissolved pore,argillaceous micro-porous.It indicates that the primarily type is dissolution pore,and pore coordination number is low.The pore structure of reservoir is complex,and there is a strong heterogeneity in the pore throat,which is primarily characterized by fine-micro pore.The low compositional maturity of the rock,the dense cemented cementation type,the high content of interstitial material,and the strong diagenetic alteration enable this area become a dense cemented reservoir.The research strengthens the understanding of the reservoir,and has a practical significance to the analysis of the reservoir diagenesis characteristics,and the optimum of the field development district.

关 键 词：松辽盆地 长岭气田 登娄库组 岩石学 孔隙结构 

分 类 号：P618.13[天文地球—矿床学]