断块油藏高含水井关井后剩余油再动用运移规律微观模拟  

Microscopic simulation of the migration law of remaining oil reuse after shut-in of high water cut wells in fault block reservoirs

作　　者：孔维军[1] 李立峰[1] 张建宁[1] 苏书震 师国记[1] 黄耀[1] 张美丹 KONG Weijun;LI Lifeng;ZHANG Jianning;SU Shuzhen;SHI Guoji;HUANG Yao;ZHANG Meidan(Oil Production Plant of Sinopec Jiangsu Oilfield Company,Yangzhou,Jiangsu 225265,China)

机构地区：[1]中国石化江苏油田分公司采油一厂,江苏扬州225265

出　　处：《中国科技论文》2024年第1期70-76,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(51974343);国家科技重大专项(2016ZX05011-002-003)。

摘　　要：基于微观可视化光刻玻璃模型,从微观角度定性、定量研究了断块油藏高含水井关井后剩余油再动用运移规律,并开展了影响因素分析。结果表明:水驱后关井期间剩余油再动用类型主要为滴状、柱状和簇状。关井期间剩余油会沿模型倾斜方向向高部位运移聚集,有利于后续水驱阶段进一步提高驱油效率。地层倾角的增大、原油黏度的减小有利于剩余油再动用;关井时间的增加有利于剩余油向高部位采出端接近聚集;后续水驱阶段注入速度的增大会增加波及面积。Based on the microscopic visual lithography glass model,the remaining oil reuse and migration law of a high water cut fault block reservoir was studied both qualitatively and quantitatively from the microscopic perspective,and the influencing factors were analyzed.The research results show that the remaining oil reuse types during well shut-in at the end of water flooding are mainly drop,column and cluster.During the shut-in period,the remaining oil will migrate and accumulate to a high position along the model tilt direction,which is beneficial to further improving the oil displacement efficiency in the subsequent water flooding stage.The increase in the formation dip angle and the decrease in crude oil viscosity are beneficial to the remaining oil reuse,and the increasing of well shut-in time is conducive to the accumulation of remaining oil toward the high part of the production end.More-over,the increase of the injection rate in the subsequent water flooding stage results in elevated swept area.

关 键 词：高含水 断块油藏 剩余油再动用 运移规律 影响因素 

分 类 号：TE327[石油与天然气工程—油气田开发工程]