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

发布时间：2018-02-24 21:44

本文关键词： 成岩作用成岩相致密油储层长合水地区鄂尔多斯盆地　出处：《地质科技情报》2017年03期 　论文类型：期刊论文

【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。
[Abstract]:The diagenesis of Chang 7 tight oil reservoir in Heshui area of Ordos Basin was studied by conventional thin sheet, cast thin plate, cathodic luminescence, scanning electron microscope and X-ray diffraction, and the diagenetic facies types were identified. The standard of diagenetic facies division for log response is established, and the diagenetic facies plane distribution is predicted by "dominant phase" method. The results show that diagenesis of Chang7 tight oil reservoir in this area mainly includes compaction. Cementation and dissolution. Compaction squeezes the primary pores, which makes the physical properties of the reservoir worse, the cementation has a double effect on the physical properties, and the dissolution produces secondary pores. The study area can be divided into five types of diagenetic facies, such as strongly dissolved pore facies, weakly cemented residual intergranular pore facies, clay mineral cemented intergranular pore facies, carbonate cemented facies and strong pressure solid facies. Most of the strongly dissolved pore facies and the residual intergranular pore facies of weak cementation are developed in the middle of the turbidite channel, and they are widely developed, and most of the high-quality reservoirs are developed, the clay mineral cemented intergranular pore facies, the clay mineral cemented intergranular pore facies, The carbonate cementation facies and the strong pressure solid facies are mostly developed between the flanks of turbidite channel and the turbidite channel, with poor physical properties and poor reservoir or non-reservoir development.
【作者单位】：西北大学大陆动力学国家重点实验室;西北大学地质学系;中国石油长庆油田分公司第六采油厂;中国石油长庆油田分公司第一采油厂;中国石油长庆油田分公司第二采气厂;长城钻探工程有限公司录井公司;
【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)
【分类号】：P618.13;P631.81

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