WXS油藏长期水驱储层物性参数变化规律

doi:10.12108/yxyqc.20190314

岩性油气藏 ›› 2019, Vol. 31 ›› Issue (3): 120–129.doi: 10.12108/yxyqc.20190314

WXS油藏长期水驱储层物性参数变化规律

熊山, 王学生, 张遂, 赵涛, 庞菲, 高磊

中国石油长庆油田分公司第一采油厂, 陕西延安 716000

收稿日期:2018-11-15 修回日期:2018-12-26 出版日期:2019-05-21 发布日期:2019-05-06
第一作者:熊山(1971-),男,工程师,主要从事油藏评价及油气田开发方面的研究工作。地址:(710068)陕西省延安市宝塔区河庄坪镇中国石油长庆油田分公司第一采油厂。Email:xscqyt2010@126.com。
基金资助:
国家自然科学基金面上项目“变形介质复杂储层应力敏感性的岩石流变学机理及动态模型”（编号：51104119）资助

Physical properties variation of WXS reservoir after long-term water flooding

XIONG Shan, WANG Xuesheng, ZHANG Sui, ZHAO Tao, PANG Fei, GAO Lei

No.1 Oil Production Plant, PetroChina Changqing Oilfield Company, Yan'an 716000, Shaanxi, China

Received:2018-11-15 Revised:2018-12-26 Online:2019-05-21 Published:2019-05-06

摘要/Abstract

摘要： 吐哈WXS油藏经过24年注水开发，已经进入高含水阶段，注入水对储层的长期冲刷和浸泡导致储层敏感性发生变化。通过X射线衍射、全岩定量分析、高压压汞实验、扫描电镜等方法，在分析目标储层长期注水前后岩石矿物成分和黏土组成、渗透率和孔隙结构等变化的基础上，针对水淹层岩心和油层岩心分别进行储层敏感性评价实验。结果表明，长期注水冲刷容易造成目标储层黏土矿物含量下降，增强储层的非均质性，进而导致储层在长期水驱后敏感性发生不同程度的变化，其变化幅度与敏感类型及储层所属层位的不同而出现差异。在后期注水及储层改造中应针对不同部位储层的敏感性进行相应的调整，以改善油田开发效果。

关键词: 水驱, 孔隙结构, 储层敏感性, 黏土组成, 伤害程度

Abstract: After decades of waterflooding, WXS reservoir of Tuha Oilfield has entered a high water cut stage. The mineral composition and clay composition, and pore structure of the reservoir have been changed by longterm washing and soaking of the injected water, which causes the change of reservoir sensitivity. On the basis of analyzing the changes of rock mineral composition, clay composition, permeability and pore structure before and after long-term water injection by using test methods of X-ray diffraction, full rock quantitative analysis, core mercury intrusion, scanning electron microscope (SEM), reservoir sensitivity evaluation experiments were carried out for the cores of water-flooded layer and the cores of oil layer respectively. The results show that longterm water flooding can easily cause the decrease of clay mineral content and enhance the reservoir heterogeneity. After long-term water flooding, the reservoir sensitivity varies in different degrees, and the variation range varies with the sensitivity types and the layers. The later stage of water injection and reservoir reconstruction should be adjusted according to the different reservoir sensitivity of different layers to improve the development effect of oilfields.

Key words: water flooding, pore structure, reservoir sensitivity, clay composition, damage degree

中图分类号:

TE343

熊山, 王学生, 张遂, 赵涛, 庞菲, 高磊. WXS油藏长期水驱储层物性参数变化规律[J]. 岩性油气藏, 2019, 31(3): 120–129.

XIONG Shan, WANG Xuesheng, ZHANG Sui, ZHAO Tao, PANG Fei, GAO Lei. Physical properties variation of WXS reservoir after long-term water flooding[J]. Lithologic Reservoirs, 2019, 31(3): 120–129.

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WXS油藏长期水驱储层物性参数变化规律

Physical properties variation of WXS reservoir after long-term water flooding

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