早期注聚油藏波及系数研究  

The Sweep Coefficient of Early Polymer Injection Reservoirs

作　　者：张静 陈晓明 刘玉娟 郑彬 李金宜 ZHANG Jing;CHEN Xiaoming;LIU Yujuan;ZHENG Bin;LI Jinyi(Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《重庆科技大学学报（自然科学版）》2024年第5期17-22,共6页Journal of Chongqing University of Science and Technology(Natural Sciences Edition)

基　　金：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001);中海石油(中国)有限公司科研项目“海上砂岩油田剩余油地质成因及精准挖潜研究”(YXKY-2019-KFSC-01)。

摘　　要：对于早期注聚油藏开发,需解决波及系数动态变化规律难以定量刻画,以及未来波及系数难以准确预测等问题。为此,基于改进的相渗曲线、水驱曲线及Welge方程,提出一种早期注聚油藏体积波及系数计算及预测方法。研究结果表明:在早期注聚低中含水阶段,体积波及系数的增长速度随着含水率上升而逐渐增大;进入注聚高含水阶段后,长期冲刷形成低效驱替,体积波及系数的增长速度随着含水率上升而逐渐降低;进入后续水驱阶段后,油水流度比增大,体积波及系数下降;当采取稳油控水措施后,体积波及系数再次缓慢上升。以渤海L油田动态资料为基础,定量表征油田及单井区的波及系数及洗油程度,并形成图版。In response to the difficulty of quantitatively characterizing the sweep coefficient dynamic changes during the early development of polymer injection reservoirs and predicting the future sweep coefficient,a method for calculating and predicting the sweep coefficient of early polymer injection reservoirs is proposed based on the improved phase permeability curve,water drive curve and Welch equation.The research results indicate that in the early stage of polymer injection with low to medium water content,the growth ratio of volume sweep coefficient gradually increases with the increase of water content.After entering the stage of high water content,long-term erosion forms inefficient displacement,and the growth ratio of the volume sweep coefficient gradually slows down with the increase of water content.After entering the subsequent water flooding stage,the oil-water mobility ratio increases and the volume sweep efficiency decreases.After implementing measures to stabilize oil and control water,the volume sweep coefficient slowly increased again.Based on the dynamic data of Bohai L oilfield,the sweep coefficient and oil washing degree of single well area are quantitatively characterized,and the chart is formed.

关 键 词：早期注聚 相渗曲线 水驱曲线 波及系数 洗油程度 调整挖潜 

分 类 号：TE341[石油与天然气工程—油气田开发工程]