松辽盆地庆深气田火山岩储层的微观结构研究  

Micro-fabrics of Reservoir Volcanic Rocks in the Qingshen Gas Field of the Songliao Basin

作　　者：曲延明[1] 舒萍[1] 纪学雁[1] 丁日新[1] 白雪峰[1] 王璞珺[2] 

机构地区：[1]大庆油田勘探开发研究院,黑龙江大庆163712 [2]吉林大学地球科学学院,长春130061

出　　处：《吉林大学学报（地球科学版）》2007年第4期721-725,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40372066);高等学校博士学科点专项科研基金项目(20030183042)

摘　　要：松辽盆地营城组火山岩是庆深气田主要的储层。火山岩储集空间主要有4种组合类型,其中溶蚀孔+微孔隙型最为常见。孔隙是主要的储集空间,裂缝平均孔隙度为0.101%,主要起连通作用。通过火山岩样品的压汞分析,将毛细管压力曲线分为Ⅰ～Ⅴ类。最大孔喉半径为4.9μm,分选系数为0.3～2.6,孔喉歪度为粗歪度。综合储层微观结构研究成果和试气结果分析认为:(1)火山通道相的火山角砾岩和角砾熔岩、喷溢相上部亚相的气孔流纹岩和侵出相内带亚相的球粒流纹岩和珍珠岩为好储层;(2)研究区储层孔隙结构以微孔喉为主、孔喉比大、孔喉的连通性及渗流能力较弱等特点,储层以Ⅱ、Ⅲ类孔喉为主,大部分气井需大型压裂改造,才能达到工业气流。The volcanic rocks of the Early Cretaceous Yingcheng Formation are the main reservoir rocks in the Qingshen gas field of the Songliao Basin. Reservoir space is classified as fissure and pore, the latter is premier and the former serves as main tunnels for fluid migration. There are 4 types of reservoir spaces, and the most common one is combined disoloved emposieu and micropore. By mercury penetration analyzing of volcanic samples, capillary pressure curves are on a scale from Ⅰ to Ⅴ. Volcanic breccias and breccias lava developing from volcanic conduit, vesicle rhyolith developing from intrafacies on top of effusion facies, and pyromeride or pearlite from inner zone intrafacies of intruded facies, are suggested to be the best reservoirs. Their sorting coefficient is from 0. 3 to 2.6, coarse skewness, maximum pore throat＇s radius is 4.9 μm, thus being of better reservoir＇s physical properties. In all the ways, reservoir＇s pore structure of the region is featured by dominance of micropore throat, big proportion of pore and throat and wider distribution range. These reservoirs need commonly extensive fracture treatment so that commercial gas flows can be gained.

关 键 词：松辽盆地 火山岩储层 微观结构 特征参数 

分 类 号：P618.13[天文地球—矿床学]