哈得逊油田东河砂岩储层水淹变化机理研究

doi:10.3969/j.issn.1673-8926.2017.02.019

岩性油气藏 ›› 2017, Vol. 29 ›› Issue (2): 150–159.doi: 10.3969/j.issn.1673-8926.2017.02.019

哈得逊油田东河砂岩储层水淹变化机理研究

刘强^1,2, 余义常³, 江同文⁴, 徐怀民¹, 昌伦杰², 王超²

1. 中国石油大学(北京)地球科学学院, 北京 102249;
2. 中国石油塔里木油田分公司勘探开发研究院, 新疆库尔勒 841000;
3. 中国石油勘探开发研究院, 北京 100083;
4. 中国石油塔里木油田分公司, 新疆库尔勒 841000

收稿日期:2016-05-22 修回日期:2016-08-02 出版日期:2017-03-21 发布日期:2017-03-21
通讯作者: 徐怀民(1962-),男,博士,教授,主要从事开发地质学的教学和科研工作。Email:xuhm@cup.edu.cn。
作者简介:刘强(1970-),男,中国石油大学(北京)在读博士研究生,研究方向为油气田开发地质学。地址:(102249)北京市昌平区中国石油大学地质楼905室。电话:(010)89732003。Email:liuq006@sina.com
基金资助:
国家重大科技专项“复杂油气藏精细表征与剩余油分布预测”（编号：2011ZX05009-003）资助

The mechanism of reservoir transition through waterflooding of Donghe sandstone in Hadeson Oilfield

LIU Qiang^1,2, YU Yichang³, JIANG Tongwen⁴, XU Huaimin¹, CHANG Lunjie², WANG Chao²

1. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
2. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China;
3. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
4. PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China

Received:2016-05-22 Revised:2016-08-02 Online:2017-03-21 Published:2017-03-21

摘要/Abstract

摘要： 为了更加高效地封堵哈得逊油田东河砂岩储层水淹后的优势通道，利用各类岩心分析资料及水淹解释结论，对哈得逊油田东河砂岩储层的岩石学、孔喉结构类型、储层水淹变化规律及机理进行了研究。结果表明：哈得逊油田东河砂岩储层黏土矿物绝对含量低，大部分为速敏性的高岭石与伊利石，粒径主要为1～2 μm，储层可分为孔喉半径小于2 μm的细微喉-低渗储层、孔喉半径介于2～5 μm的细喉-中渗储层及孔喉半径大于5 μm的中细喉-高渗储层；水淹后黏土矿物的堵塞和迁出是导致储层物性变化的原因，而黏土矿物粒径大小与喉道尺寸的匹配程度控制了储层水淹前后及不同水淹程度下物性变化的方向。这些因素造成了3 类储层的水淹变化机理：细微喉-低渗储层水淹后孔、渗值下降，由原状储层至低水淹逐渐减小，到中水淹时有所增大，高水淹时最小；细喉-中渗储层水淹后孔、渗值上升，由低水淹至中水淹逐渐增大，到高水淹时有所减小；中细喉-高渗储层水淹后孔、渗值增大，且随着水淹程度的增高而增大，该类储层即优势通道发育所在，可采用粒径为3～4 μm的微球对其进行高效、精准的封堵。研究区注水开发后剩余油规模较大，开展储层水淹变化机理研究，具有重要的现实意义。

Abstract: In order to block the dominate pathway after waterflooding in Donghe sandstone reservoir of Hadeson Oilfield efficiently,the data of reservoir physical properties,mercury injection,cast thin sections,clay mineral Xray diffraction,scanning electronic microscope and waterflooding interpretation conclusions,were used to study the petrologic features,pore throat structure,reservoir transition rule and mechanism after waterflooding in Donghe sandstone reservoir. The results show that the absolute content of clay mineral Donghe sandstone reservoir is low, and most clay minerals are kaolinite and illite with velocity sensitivity,and range from 1 to 2 μm in grain size.Donghe sandstone reservoir can be divided into three types:thin-micro throat and low permeability reservoir with throat radius less than 2 μm,thin throat and middle permeability reservoir with throat radius of 2-5 μm,and middlethin throat and high permeability reservoir with throat radius larger than 5 μm. Clay mineral block and migration after waterflooding are the reasons for the change of reservoir physical properties. The matching of clay mineral grain size and throat radius controls the reservoir transition rule after waterflooding. There are three kinds of mechanism:the porosity and permeability of thin-micro throat and low permeability reservoir decrease after waterflooding,and they decrease from original to low waterflooding,then slightly increase till middle waterflooding, and decrease again in high waterflooding. The porosity and permeability of thin throat and middle permeability reservoir firstly increase,then increase higher and decrease in high waterflooding. The porosity and permeability of middle-thin throat and high permeability reservoir increase with the increase of waterflooding degree, and this type of reservoir is favorable for advantageous pathway development. There are a large number of residual oil after waterflooding,therefore in the study area,so it is of significance to conduct reservoir transition rule and mechanism research after waterflooding.

中图分类号:

TE34

刘强, 余义常, 江同文, 徐怀民, 昌伦杰, 王超. 哈得逊油田东河砂岩储层水淹变化机理研究[J]. 岩性油气藏, 2017, 29(2): 150–159.

LIU Qiang, YU Yichang, JIANG Tongwen, XU Huaimin, CHANG Lunjie, WANG Chao. The mechanism of reservoir transition through waterflooding of Donghe sandstone in Hadeson Oilfield[J]. Lithologic Reservoirs, 2017, 29(2): 150–159.

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哈得逊油田东河砂岩储层水淹变化机理研究

The mechanism of reservoir transition through waterflooding of Donghe sandstone in Hadeson Oilfield

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