长8储层微观孔隙结构特征对可动流体的影响  

Effect of micro-pore structure on the movable fluid in Chang 8 reservoir

作　　者：雒斌[1] 孙卫[1] 吕可 

机构地区：[1]西北大学地质学系大陆动力学国家重点实验室,陕西西安710069 [2]中国石油长庆油田分公司第八采油厂,陕西西安710018

出　　处：《石油化工应用》2017年第5期110-115,共6页Petrochemical Industry Application

摘　　要：鄂尔多斯盆地板桥-合水地区储层物性差、渗流机理复杂,制约了对该区块的勘探开发。通过对铸体薄片、高压压汞、SEM、恒速压汞和核磁共振等数据的研究归纳,总结了该地区主力油层长8储层的微观孔隙结构特征和储层流体微观赋存状态及其可流动性的影响。结果表明:长8储层砂岩类型为岩屑长石砂岩,孔隙类型为粒间孔和溶蚀孔,主要孔喉组合类型为粒间孔-溶孔,黏土含量高。孔隙类型、黏土矿物、喉道半径和孔喉比影响可动流体,其中喉道半径和孔喉比对储层可动流体饱和度起主要影响作用。The reservoirs in Banqiao-Heshui area of Ordos basin have poor physical properties and complex seepage mechanism,which restricts the exploration and development of the block.Based on the study of the data such as cast sheet,high pressure mereury,SEM,eonstant pressure mercury and NMR,the microscopic pore structure characteristics and the microscopic occurrence of reservoir fluid in the Chang 8 reservoir are summarized.The impact of liquidity. The results show that the sandstone type of Chang 8 reservoir is lithic feldspar sandstone, and the pore type is intergranular pore and dissolution pore.The main pore throat combination type is intergranular pore-pore and clay content.Pore type,clay mineral,throat radius and pore throat ratio of the movable fluid,in which the throat radius and pore throat ratio play a major role in the reservoir fluid saturation.

关 键 词：鄂尔多斯盆地 板桥-合水地区 长8储层 微观孔隙结构 渗流能力 

分 类 号：P618.13[天文地球—矿床学] TE311[天文地球—地质学]