边水稠油油藏蒸汽吞吐泡沫堵水研究与应用  

Research and application of steam huff and puff foam water shutoff in heavy oil reservoir with edge water

作　　者：文权[1] 戎凯旋 岳明 王涛[1] 王飞[1] 于雯汀 郑前 WEN Quan;RONG Kaixuan;YUE Ming;WANG Tao;WANG Fei;YU Wenting;ZHENG Qian(Oilfield Production Department of China Oilfield Services Limited,Tianjin 300459,China;CNOOC(China)Limited Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300459 [2]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《石油化工应用》2023年第5期37-43,共7页Petrochemical Industry Application

摘　　要：蒸汽吞吐是开发稠油油藏一项重要的热采技术,然而由于边水侵入导致吞吐井含水率急剧增加,边水稠油油藏蒸汽吞吐井的开发效果受到严重影响。本文在蒸汽驱装置的基础上,设计了模拟边水稠油油藏进行蒸汽吞吐的实验装置,对氮气泡沫堵水技术进行了研究。通过一维双填砂管实验研究了该技术的影响因素和应用条件,实验结果表明:储层水侵程度、边水能量大小和原油黏度对该技术的效果有显著影响。注入时机越晚,堵水效果越明显;堵水效果会随着边水能量增强呈现先增加后减小的趋势;原油黏度越大水侵时间越早,堵水效果越差。通过一维双填砂管实验研究了该技术的注入方式,实验结果表明:最佳注入方式为氮气段塞+氮气泡沫段塞+蒸汽段塞。通过实验研究表明该技术更适用于蒸汽吞吐井周期吞吐含水率不小于80%的边水水侵油藏、储层边水能量中等和油藏条件下稠油黏度小于10000 mPa·s。目标稠油油藏的水体倍数为5~10倍,油藏条件下原油黏度小于5000 mPa·s,满足矿场试验的条件。根据研究结果在海上W油田P8H和P9H井进行了矿场试验,作业成功率100%,油井周期吞吐含水率平均降低22.5%,周期增油量平均提高4914 m^(3)。试验结果表明,该技术能够有效地封堵边水水侵、提高蒸汽吞吐井的采收率。该项技术对海上类似稠油油田提高采收率具有很好的指导作用。Steam huff and puff is an important thermal recovery technology for developing heavy oil reservoirs.However,due to the invasion of edge water,the water content of huff and puff wells increases sharply,which seriously affects the development effect of steam huff and puff wells in edge water heavy oil reservoirs.In this paper,based on the steam drive device,an experimental device is designed to simulate steam huff and puff in heavy oil reservoirs with edge water,and the nitrogen foam water plugging technology is studied.The influencing factors and application conditions of this technology were studied through one-dimensional double sand filling tube experiments.The experimental results showed that the degree of reservoir water invasion,the size of edge water energy and the viscosity of crude oil have a significant impact on the effectiveness of this technology.The later the injection timing,the more obvious the water blocking effect.The water blocking effect will first increase and then decrease with the increase of edge water energy.The higher the viscosity of crude oil,the earlier the water invasion time,and the worse the water plugging effect.The injection mode of this technology was studied through one-dimensional double sand filled pipe experiment.The experimental results show that the best injection mode is nitrogen slug,nitrogen foam slug and steam.Experimental research has shown that this technology is more suitable for edge water invasion reservoirs with a cyclic huff and puff moisture content of no less than 80%in steam stimulation wells,reservoirs with moderate edge water energy and heavy oil viscosity less than 10000 mPa·s under reservoir conditions.The water body ratio of the target heavy oil reservoir is 5~10 times and the crude oil viscosity under reservoir conditions is less than 5000 mPa·s,meeting the conditions for field testing.According to the research results,field tests were conducted on P8H and P9H wells in the offshore W oilfield.The success rate of the operation was 100%and the average cy

关 键 词：边水 普通稠油 蒸汽吞吐 水侵 氮气泡沫堵水 

分 类 号：TE345[石油与天然气工程—油气田开发工程]