基于剩余油动用规律的高含水油藏水驱扩大波及体积方式实验  

Experiment on enlargement of swept volume by water flooding in high water cut reservoir based on the remaining oil displacement law

作　　者：李宜强 何书梅[3] 赵子豪[4] 魏朋朋 齐桓[1,2] 刘哲宇 赵玥 于英[5] Li Yiqiang;He Shumei;Zhao Zihao;Wei Pengpeng;Qi Huan;Liu Zheyu;Zhao Yue;Yu Ying(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Research Institute of Exploration and Development,PetroChina Dagang Oilfield Company,Tianjin 300280,China;CNPC Offshore Engineering Company Limited,Beijing 100028,China;Production Technology Institute,Daqing Oilfield Limited Company,Heilongjiang Daqing 163453,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)石油工程学院,北京102249 [3]中国石油大港油田公司勘探开发研究院,天津300280 [4]中国石油集团海洋工程有限公司,北京100028 [5]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《石油学报》2023年第3期500-509,共10页Acta Petrolei Sinica

基　　金：国家自然科学基金项目(No.52074318,No.52004305)资助。

摘　　要：中国多数中、高渗油藏已进入高含水开发阶段,这部分油藏剩余储量巨大,如何经济有效地开发该类油藏对中国原油稳产至关重要。利用计算机断层扫描(CT)技术和并联岩心驱替实验从孔喉尺度和岩心尺度研究了水驱流速对微观剩余油和宏观波及的影响,基于三平板并联岩心实验对比了"增注、关井、驱替"的周期注水方式与连续水驱的驱油效果。研究结果表明,水驱流速增加使得一维柱状岩心的驱油效率提升了4.4%,剩余油簇平均尺寸下降幅度随着流速的增加而增大;对于非均质岩心,流速增加2~5倍后可提高水驱驱油效果4.5%~6.3%,但增加幅度随着流速的增大而明显减少;周期注水方式建立起的压力扰动可有效扩大并联平板模型纵向和平面的水驱波及体积,在不增加注水量的前提下可比连续注水方式的采收率提高3.1%。The majority of medium and high-permeability reservoirs with huge reserves have entered into the high water cut development stage.The economic and effective development of these reservoirs is crucial for the stable production of crude oil in China.Using the computed tomography(CT)technology and the parallel core displacement experiment,the influence of water flooding velocity on microscopic remaining oil displacement and macroscopic sweep efficiency was investigated in terms of the pore throat and core scales.The cyclic water injection method of"injection increase,well shutdown and oil displacement"and the continuous water flooding method were compared in terms of oil displacement efficiency via the three-plate parallel core displacement experiment.The results show that the increase of water flooding velocity can increase the oil displacement efficiency of one-dimensional cylindrical core by 4.4%,and the decrease in the average size of remaining oil clusters is increased with the increase of flow velocity;for heterogeneous cores,an increase of 2-5 times for flow velocity can increase the oil displacement efficiency by 4.5%-6.3%,but the efficiency increment is significantly decreased with the increase of flow velocity;the pressure disturbance established by the cyclic water injection method can effectively enlarge the vertical and plane sweep volume of the parallel plate model,and thus the recovery efficiency is 3.1%higher than that achieved by the continuous water flooding method without increasing the amount of water injection.

关 键 词：波及体积 微观剩余油 CT扫描 变速驱替 周期注水 

分 类 号：TE357[石油与天然气工程—油气田开发工程]