西峰油田长8储层黏土矿物对储层物性的影响

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英文篇名：Effect of Clay Minerals on Reservoir Physical Properties of Chang 8 Reservoir in Xifeng Oilfield 作者：宋婷 ; 徐波 ; 康万东 ; 张鑫君 英文作者：SONG Ting;XU Bo;KANG Wandong;ZHANG Xinjun;Key Laboratory of Special Production Technology for Oil and Gas fields,School of Petroleum Engineering,Xi'an Petroleum University; 关键词：西峰油田 ; 长8储层 ; 填隙物 ; 黏土矿物 ; 储层物性 英文关键词：Xifeng Oilfield;;Chang 8 reservoir;;filling;;clay minerals;;reservoir property 中文刊名：CQSG 英文刊名：Journal of Chongqing University of Science and Technology(Natural Sciences Edition) 机构：西安石油大学石油工程学院陕西省油气田特种增产技术重点实验室; 出版日期：2019-02-15 出版单位：重庆科技学院学报(自然科学版) 年：2019 期：v.21;No.110 基金：国家自然科学基金项目“基于多源信息和智能计算的钻井异常自适应预警方法研究”(51574194) 语种：中文; 页：CQSG201901006 页数：5 CN：01 ISSN：50-1174/N 分类号：22-26

摘要

西峰油田的主力生产层长8储层为低孔、低渗非均质性砂岩储层,储层填隙物中黏土含量较高,对储层物性具有较大影响。西峰油田D区8口井的岩样分析结果显示,黏土矿物主要为伊利石、绿泥石、高岭石及伊蒙混层矿物。伊利石主要以孔隙桥接式产出;绿泥石主要以孔隙衬里状产出;高岭石充填于砂岩的粒间孔隙中,主要以分散质点式存在;伊蒙混层矿物多发育在绿泥石晶体表面,以孔隙充填和交代碎屑颗粒形式存在。伊利石及伊蒙混层的含量与孔隙度和渗透率呈负相关;绿泥石含量与孔隙度和渗透率呈正相关,尤其对岩石孔隙性具有积极影响;高岭石与孔隙度和渗透率呈负相关,但其相关性较弱。
        Chang 8 reservoir,the main production layer in Xifeng Oilfield,is a low porosity and low permeability heterogeneous sandstone reservoir. The content of clay in reservoir filling is high,which has great influence on reservoir physical properties. Analysis of rock samples from 8 wells in D area of Xifeng Oilfield shows that clay minerals are illite,chlorite,kaolinite and illite/montmorillonite. Illite is mainly produced by pore bridging; chlorite is mainly produced by pore lining; kaolinite fills in intergranular pores of sandstone,mainly in the form of dispersed particles. The mixed minerals of illite/montmorillonite are mostly developed on the surface of chlorite crystals,in the form of pore filling and metasomatic debris. The content of illite and illite mixed layer is negatively correlated with porosity and permeability,while chlorite content is positively correlated with porosity and permeability,and especially,it has a positive effect on rock porosity. Kaolinite is negatively correlated with porosity and permeability,but its correlation is weak.

引文

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