准噶尔盆地阜东斜坡区三叠系韭菜园子组成岩作用特征及其对储层物性影响  

Diagenesis and Its Effects on the Reservoir Property of the Triassic Jiucaiyuanzi Formation of Fudong Slope,Junggar Basin

作　　者：于景维 季汉成[2] 史燕青[2] 王泽胜[3] 卢炳雄 李钰 王良哲 YU Jingwei;JI Hancheng;SHI Yanqing;WANG Zesheng;LU Bingxiong;LI Yu;WANG liangzhe(Petroleum College,China University of Petroleunm(Beijig)at Karamay,Karatmay 834000,Xinjiang,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;Exploration and Development Institute of Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China;Resourcesand Environmental Engineering College of Beibu Gulf University,Qinzhou 535000,Guangxi,China)

机构地区：[1]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000 [2]中国石油大学(北京)地球科学学院,北京102249 [3]新疆油田勘探开发研究院,新疆克拉玛依834000 [4]北部湾大学资源与环境学院,广西钦州535000

出　　处：《西北地质》2021年第2期99-110,共12页Northwestern Geology

基　　金：国家重大专项“大型油气田及煤层气开发”(2011ZX05001-005-01);广西自然科学基金“桂中坳陷下石炭统鹿寨组页岩纳米孔隙形成机制及沉积控制”(2018JJB150094);广西科技计划-科技基地和人才专项“南方岩溶区页岩气开采压裂关键技术研发”(2018AD19040);克拉玛依市科技局项目“准东阜东斜坡区韭菜园子组成岩作用及成岩相研究”(2019RC001A)联合资助

摘　　要：三叠系韭菜园子组为准噶尔盆地阜东斜坡区重要含油层系之一,对其成岩作用类型及特征研究较少,影响到对油气储集认识以及后期储层开发。通过开展薄片观察、扫描电镜、物性分析、X-衍射以及电子探针等多种测试分析手段,明确韭菜园子组成岩作用特征及其对储层物性影响。结果表明:研究区韭菜园子组储层类型主要属于中孔-低渗储层,部分为中孔-中高渗储层,储层微观非均质性较强,成岩作用是造成储层微观非均质性强的关键因素。通过研究,认为韭菜园子组储层主要发育压实、胶结以及溶蚀成岩作用,储层成岩阶段为中成岩A期。压实作用强度普遍为中等,是造成储层物性差的重要因素;胶结作用强度为中等-强,溶蚀作用强度普遍为弱-中等,局部较强。其中方解石、黏土矿物以及硅质胶结进一步降低储层物性,沸石胶结以及溶蚀程度改善储层物性。The Triassic Jiucaiyuanzi Formation is one of the main hydrocarbon-bearing strata in Fudong slope area of Junggar basin.The lack of research on the types and characteristics of the diagenesis affected the recognition and development of the reservoirs.By using such testing technology as slice observation,SEM,property analysis,X-Ray and electron probe,the diagenesis characteristics and its effect on reservoir property were clarified.Results show that reservoir types of Jiucaiyuanzi formation are mainly middle pore and low permeability reservoirs,with some types being middle pore and middle-high permeability reservoirs.The reservoirs have strong micro anisotropy caused by diagenesis.It is concluded that the diagenesis of compaction,cementation and dissolution was developed in Jiucaiyuanzi formation.The diagenesis stage is in stage A.The moderatein tensity of the compaction is the key factors to poor property;the intensity of cementation is moderate-strong and the intensity of dissolution is weak-moderate,sometimes strong.Calcite,clay minerals and siliceous cementation further decreases the property of reservoirs,while zeolite cementation and its dissolution improves the property.

关 键 词：准噶尔盆地 阜东斜坡区 韭菜园子组 储层 成岩作用 

分 类 号：P618.13[天文地球—矿床学]