二类油层含水率与聚合物驱时机关系图版建立及应用

魏长清; 周丛丛

doi:10.3969/j.issn.1006-6535.2024.06.013

特种油气藏 >

2024 , Vol. 31 >Issue 6: 106 - 113

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.06.013

油藏工程

二类油层含水率与聚合物驱时机关系图版建立及应用

魏长清 ,
周丛丛

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1.国家能源陆相砂岩老油田持续开采研发中心,黑龙江大庆 163712;
2.中国石油大庆油田有限责任公司,黑龙江大庆 163712

魏长清(1979—),女,高级工程师, 2004年毕业于大庆石油学院石油工程专业,现主要从事化学驱后提高采收率技术研究工作。

收稿日期: 2023-07-11

修回日期: 2024-09-10

网络出版日期: 2025-01-22

基金资助

中国石油重大科技专项“中高渗油田特高含水期大幅度提高采收率技术研究”(2023ZZ22)

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Establishment and Application of Relationship Charts between Water Content in Class Ⅱ Oil Reservoirs and the Timing of Polymer Flooding

Wei Changqing ,
Zhou Congcong

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1. National Energy Research and Development Center for Sustainable Exploitation of Land-facies Sandstone Mature Oilfields,Daqing,Heilongjiang 163712,China;
2. Petro China Daqing Oilfield Co.,Ltd,Daqing,Heilongjiang 163712,China

Received date: 2023-07-11

Revised date: 2024-09-10

Online published: 2025-01-22

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摘要

针对大庆油田二类油层地质条件差、聚合物驱开发规律复杂、聚合物驱时机难以确定的问题,运用数值模拟方法建立了二类油层典型地质模型,以油田开发常用的含水率指标作为控制参数,研究了含水率与聚合物驱时机的关系及对聚合物驱开发效果的影响规律,进而建立了含水率与聚合物驱时机关系图版,给出了确定二类油层区块合理聚合物驱时机的方法。研究表明:对于二类油层,区块开始注聚合物时机越早越好,但是停止注聚合物时机一般应选在区块含水率达到96.00%~97.00%时。应用效果表明:所建立的图版对于实际区块应用效果较好,可清晰呈现聚合物驱开发规律。该图版对聚合物驱或即将聚合物驱的区块确定合理的聚合物驱时机具有重要的指导意义。

关键词： 二类油层; 含水率; 聚合物驱时机; 影响规律; 关系图版

本文引用格式

魏长清 , 周丛丛 . 二类油层含水率与聚合物驱时机关系图版建立及应用[J]. 特种油气藏, 2024 , 31(6) : 106 -113 . DOI: 10.3969/j.issn.1006-6535.2024.06.013

Abstract

To address the issue of poor geological conditions of the Class Ⅱ reservoirs in Daqing Oilfield,the complex development law of polymer flooding and the difficulty in determining the timing of polymer flooding,a typical geological model of the second-class reservoirs was established by numerical simulation method.Taking the water content index commonly used in oilfield development as the control parameter,the relationship between water content and polymer flooding timing and its influence on the development effect of polymer flooding were studied,and then the relationship between water content and polymer flooding timing was established.The method of determining the reasonable timing of polymer flooding in the Class Ⅱ reservoirs blocks is given.The research shows that the earlier the polymer injection timing is,the better it is for the Class Ⅱ reservoir blocks,but the timing of stopping polymer injection should generally be selected when the water content of the block reaches 96.00% to 97.00%.The application results show that the established chart is practical and effective for the actual block,and can clearly show the development law of polymer flooding.This chart has important predictive guiding significance for determining a reasonable polymer flooding timing for polymer flooding or the blocks that are about to be polymer flooding.

Key words： Class Ⅱ oil reservoirs; water cut; timing of polymer flooding; influence patterns; correlation chart

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