作　　者： ; ; ; ; ;

机构地区： 浙江大学地球科学系

出　　处： 《大庆石油地质与开发》 2004年第3期20-22,共3页

摘　　要： 东辛油田沙一段近年来新发现了一定储量,并建成了一定产能。研究发现湖相鲕粒灰岩是一种良好的储层,其孔隙中含大量石油。以生物碎屑鲕、圈层鲕、碎裂鲕及残鲕为主;从形态上来说,以长(条)形鲕为主。鲕粒一般沉积于浅水高能环境,核心以生物碎片(化石)为主。鲕粒的次生变化可分为早期生物粘结作用和后期成岩改造作用,以碎裂、变形和溶蚀最为常见和最具特点。此外鲕粒灰岩与油气关系密切,它不仅具有良好的储集能力和孔渗能力,而且自身具有生油能力,其油气演化特点与其他类型的生油岩相似。 Recently,some reserves have been found in Member 1 of Shahejie Formation.Ooides with better reservoir features are observed in lacustrine facies of Member 1 of Shahejie Formation in Dongxin Oilfield,which possess all kinds of styles and shapes.Among them fragment ooides,loop ooides,fragmental ooides and remnant ooides take the first place,which take on complex causes,including not only algae pisolites,algae oncolites from biology,but also algae ooides,hollow ooides and concentric ooides from biology- chemistry process.These characters provide evidences for sediment and local tectonic condition.Generally ooides deposit in shallow and high energy surrounding,where their cores are more biogenic debris than calcite crystal,generally ooides congregate shallow lake and alongshore belt.Secondary change of ooides can be sorted into forepart biologic cohere process and anaphase diagenesis process.Furthermore,there is a good connection between ooide rocks and oil,ooide rocks have not only excellent pervasion ability,but also the ability of creating oil itself,resembling other styles of source rock in term of oil evolvement

关 键 词： 沙一段 湖相 鲕粒 灰岩 油气

领　　域： [石油与天然气工程]