甘谷驿油田长6油层储层成岩作用机理研究  

Diagenesis mechanism study in Chang6 reservoir of GanGuyi Oil Field

作　　者：李园园[1] 李得成[1] 车明[2] 

机构地区：[1]长安大学地球科学与国土资源学院,陕西西安710054 [2]长庆油田分公司第四采油厂,陕西靖边718500

出　　处：《内蒙古石油化工》2007年第4期79-81,共3页Inner Mongolia Petrochemical Industry

摘　　要：甘谷驿油田长6油层以中细粒长石砂岩为主,主要成岩矿物有绿泥石环边、方解石胶结物、长石和石英加大生长、伊利石、伊-蒙混层、钠长石和高岭石等。在成岩过程中,强烈的压实作用及胶结作用导致原生孔隙丧失殆尽,是储层成为特低渗透率的主要原因;而晚期的溶蚀作用,特别是方解石、浊沸石的溶解,使得储层的孔隙度和渗透率有所改善。Sandstone is consist of fine--middle grained arkoses in GanGuyi Oil Field in Ordos basin. The main diagenetic mineral of the sandstones include： chlorite grain rim, calcite cement, quartz and feldspar overgrowth,illite,illite --montomorillonite mixed layer,albite and kaolin. During the diagenetic process, the mechanical compaction and cementation which result in primary porosity loss almost are the main factor causing the lowest permeability in the early diagenetic phase; the dissolution that calcite and laumontite were dissolved improved the porosity and permeability.

关 键 词：甘谷驿油田 长6储层 成岩作用 储层性质 

分 类 号：P618.130.2[天文地球—矿床学]