阿克库勒凸起东河砂岩成岩作用与成岩相  

DIAGENESIS AND DIAGENETIC FACIES OF DONGHE SANDSTONE OF AKEKULE UPLIFTIN TARIM BASIN

作　　者：刘清俊[1,2] 于炳松[1] 周芳芳[3] 任艳[1] 

机构地区：[1]地质过程与矿产资源国家重点实验室.中国地质大学,北京海淀100083 [2]中国地质大学长城学院,河北保定071000 [3]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011

出　　处：《西南石油大学学报（自然科学版）》2011年第5期54-62,192,共9页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家油气专项(2008ZX05005-04-06HZ)

摘　　要：为了深入探讨成岩作用对东河砂岩储层质量的影响,对阿克库勒凸起20口井的岩芯样品进行了系统的铸体薄片、电子探针、扫描电镜、X衍射等分析,结果显示:本区东河砂岩储集砂体以石英砂岩、岩屑石英砂岩为主,并有岩屑砂岩、长石岩屑砂岩以及长石石英砂岩;成岩作用的类型有压实作用、胶结作用、溶解作用及交代作用;溶解作用为主要建设性成岩作用,包括早期碳酸盐胶结物溶解、长石颗粒的溶解和岩屑的溶解;晚期碳酸盐胶结作用对本区储层的破坏性最大。综合成岩作用的组合类型和演化序列,认为东河砂岩的成岩演化主体已进入中成岩阶段A期。在本区主要识别出4种成岩相:晚期钙质强烈胶结成岩相,弱石英次生加大与较强溶解成岩相,较强石英次生加大与较弱溶解成岩相和较强压实较弱溶解成岩相。弱石英次生加大与较强溶解成岩相为本区有利成岩相,有利于次生孔隙的形成与保留。On the basis of core analysis,casted thin section,scan electron microscope,electron probe and X-raydiffraction,this paper studies the diagenesis and diagenetic facies of Donghe sandstone of Akekule Uplift,TarimBasin.The reservoir rocks mainly include Quartzarenite,Sublitharenite and less Litharenite,subarkose,feldspathiclitharenite.The types of the diagenesis are the compaction,cementation,replacement and dissolution.Theconstructive diageneses mainly included compaction,cementation,replacement.and the constructive diagenesesare disolution.Later Carbonate cementation was the most unfavorable destructive diageneses.The diagenetic stagebelongs to the'A'middle diagenesis.Four diagenetic facies were petrographically and petrophysically recognized.They are later carbonate cementation dense diagenetic facies,weak Quartz cementation and strong dissolution diageneticfacies,strong Quartz cementation and weak dissolution diagenetic facies,relatively strong compactiondiagenetic facies.The weak Quartz cementation and strong dissolution diagenetic facies were favorable for formingand keeping secondary porosity.

关 键 词：成岩相 成岩作用 东河砂岩 阿克库勒凸起 塔里木盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]