应用测井响应评价致密油储层成岩相:以鄂尔多斯盆地合水地区长7储层为例  

Evaluation of Tight Oil Reservoir Diagenetic Facies by Logging Response:A Case Study of the Chang 7 Reservoir in Heshui Area,Ordos Basin

作　　者：张浩[1,2] 陈刚[1,2] 唐鑫[3] 党永潮 邵飞[4] 李莉[4] 陈晨[5] 贾然 

机构地区：[1]西北大学大陆动力学国家重点实验室,西安710069 [2]西北大学地质学系,西安710069 [3]中国石油长庆油田分公司第六采油厂,西安716069 [4]中国石油长庆油田分公司第一采油厂,陕西延安716000 [5]中国石油长庆油田分公司第二采气厂,西安716069 [6]长城钻探工程有限公司录井公司,辽宁盘锦124010

出　　处：《地质科技情报》2017年第3期262-270,共9页Geological Science and Technology Information

基　　金：中国地质调查局油气资源调查项目(1212011220761-03);大陆动力学国家重点实验室科技部重点专项经费项目(BJ14252)

摘　　要：运用常规薄片、铸体薄片、阴极发光、扫描电镜及X射线衍射等实验手段,对鄂尔多斯盆地合水地区长7致密油储层成岩作用进行了研究,识别出成岩相类型,建立了测井响应成岩相划分标准,采用"优势相"法预测了成岩相平面展布。研究表明,该区长7致密油储层发育的成岩作用主要包括压实作用、胶结作用及溶蚀作用。压实作用挤占原生孔隙,使储层物性整体变差,胶结作用对物性具有双重影响,溶蚀作用产生次生孔隙,有利于改善储层物性。研究区可划分出强溶蚀溶蚀孔相、弱胶结剩余粒间孔相、黏土矿物胶结晶间孔相、碳酸盐胶结相和强压实相5类成岩相,强溶蚀溶蚀孔相及弱胶结剩余粒间孔相多发育在浊积水道中部,且发育广泛,多发育优质储层;黏土矿物胶结晶间孔相、碳酸盐胶结相和强压实相多发育在浊积水道侧翼或浊积水道间,物性较差,多发育差储层或非储层。The conventional thin sections, casting thin sections, cathodoluminescence and scanning electron microscopy （SEM） and X ray diffraction experiment were used to study the reservoir diagenesis of Chang 7 tight iol reservoir in Heshui area, Ordos Basin, and to identifyits diagenetic facies types and establish the criteria for the classification of well logging response, while ＂dominant facies＂ method was used to predict the distribution of diagenetic facies. Research shows that the 7 diagenesis of the reservoir development dis- trict mainly includes compaction, cementation and dissolution. The occupation of compaction in the prima- ry pores worsens the reservoir property which is in turn influenced by ,while the dissolution of secondary pores favors the reservoir physical properties. The study area can be divided into strong corrosion dissolu- tion pore facies, weak cementation residual intergranular pore facies, clay mineral inter-crystal glue facies, carbonate cementation facies and strong compaction facies. The first two facies, dissolution pore facies and intergranular pore facies are often developed in the middle of turbidity water channel in a wide distribution. This extensive development may lead to the formation of high quality reservoirs. In contrast, the other three facies, inter-crystal glue pore facies, carbonate cementation facies and coampaction facies, are more developed on both flanks of the water channel or in the middle of the channel, with poor physical proper- ties, poor reservoir or non-reservoir.

关 键 词：成岩作用 成岩相 致密油储层 长7 合水地区 鄂尔多斯盆地 

分 类 号：P631.81[天文地球—地质矿产勘探]