陆西凹陷九佛堂组混积岩的岩石学特征及分类——以辽河油田庙35井为例  

Petrological Characteristics and Classification of Migmatites of Jiufotang Formation in Luxi Sag:A Case Study of Miao-35 Well,Liaohe Oilfield

作　　者：江淮 王振宇[1] 冉波[2] 张甲明[2] 裴家学[2] 刘邦 JIANG Huai;WANG Zhenyu;RAN Bo;ZHANG Jiaming;PEI Jiaxue;LIU Bang(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China;Research Institute of Exploration and Development of Petro China Liaohe Oilfield Company,Panjin Liaoning 124010,China)

机构地区：[1]西南石油大学地球科学与技术学院,成都610500 [2]中国石油辽河油田公司勘探开发研究院,辽宁盘锦124010

出　　处：《重庆科技学院学报（自然科学版）》2021年第1期31-36,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金项目“米仓山地区埃迪卡拉系灯影组核形石微组构及环境意义”(41702122);中国石油天然气集团公司重大科技专项“辽河探区可持续规模增储勘探关键技术研究”(2017E-1601)。

摘　　要：以辽河油田庙35井九佛堂组下段岩石为研究对象,通过岩心观察、薄片鉴定、电子探针成分测定,分析九佛堂组下段岩石的矿物成分、组分结构特征。认为其矿物成分包括白云石、方解石、石英、长石、岩屑及黏土矿物、凝灰质,组分结构主要包括颗粒、泥、填隙物。应用碳酸盐组分、陆源碎屑组分、火山碎屑组分3端元分类方案,划分出碳酸盐岩、陆源碎屑岩、混积岩等类型。其中,碳酸盐岩包括砾屑云岩、砂屑云岩、鲕粒云岩、泥晶云岩等;混积岩包括陆源碎屑-碳酸盐混积岩、碳酸盐-陆源碎屑混积岩。垂向上表现为多个颗粒云岩、泥晶云岩、细砂岩、凝灰岩的旋回,单个旋回通常在0.5~2.0 m。Based on the data of core observation,thin section identification and electron probe microanalysis,the characteristics of migmatite in the lower member of Jiufotang Formation in Miao-35 well( Liaohe Oilfield) are analyzed. Its composition includes dolomite,calcite,quartz,feldspar,cuttings,clay minerals and tuffaceous matter,and its structural components include particles,mud and interstitial materials. 3-endmember classification scheme of carbonate,terrigenous clastic and volcaniclastic components are used to classify the types of carbonate,terrigenous clastic and migmatite. The carbonate rocks include gravelly clastic dolomite,sandy clastic dolomite,oolitic dolomite and micritic dolomite,and the migmatite includes terrigenous clastic carbonate migmatite and carbonate terrigenous clastic migmatite. Vertically,it shows multiple sequences of granular dolomite,micritic dolomite,fine sandstone and tuff,and the single cycle is usually 0. 5 ~ 2. 0 m.

关 键 词：混积岩 岩石类型 九佛堂组 陆西凹陷 庙35井 

分 类 号：TE121[石油与天然气工程—油气勘探]