摘要
为了有效动用开发难度极大的深层低渗透敏感稠油油藏,以胜利油区王家岗油田王152块为例,在深入分析开发难点和渗流机理的基础上,创新性提出降黏引驱开发技术,利用单管填砂驱油模型实验、油藏工程方法和数值模拟方法,开展深层低渗透敏感稠油油藏的开发技术界限研究。研究结果表明:生产井降黏吞吐引效,注入井早期变浓度连续驱替、后期变浓度段塞降黏驱替的降黏引驱技术开发深层低渗透敏感稠油油藏,能提高采出程度14.3%。同时优化并确定了降黏引驱的驱替方式、引效周期、降黏体系浓度及注入量等开发技术关键参数。王152块王152-斜6井组先导试验结果证实,截至2020年9月,井组日产油量峰值为11.5 t/d,比试验前提高了5.4倍,驱替生产157 d,累积注入量为6534 m^(3),所有采油井均已见效,井组累积产油量为856 t,开发效果明显改善,预测提高采收率为11.0%,实现了深层低渗透敏感稠油油藏从未动用到有效动用的转变。
In order to effectively produce deep,low-permeability and sensitive heavy oil reservoirs which is extremely diffi⁃cult to develop,this paper takes Block Wang152 of Wangjiagang Oilfield in Shengli Oil Province as an example to conduct in-depth analysis of development difficulties and flow mechanism,and on this basis,puts forward an innovative technology of viscosity reduction induced flooding.Besides,in virtue of the single-tube sand-filling flooding model experiments,reser⁃voir engineering methods and numerical simulation methods,the paper studies the development technology limits of deep,low-permeability and sensitive heavy oil reservoirs.According to the proposed technology,viscosity reduction is implement⁃ed in producing wells for them to enhance huff-and-puff recovery;early continuous flooding with variable concentrations and later viscosity reduction and flooding with variable concentrations and slugs are implemented in injection wells.The re⁃sults show that the technology helps increase the recovery of deep,low-permeability and sensitive heavy oil reservoirs by 14.3%.The key parameters of the development technology such as the flooding mode,the effective cycle,the concentration of viscosity reducers,and the injection volume are also optimized and determined.The pilot test results of Wang152-X6 well group in Block Wang152 show that,by September 2020,the peak daily oil production of the well group was 11.5 t/d,which was 5.4 times higher than that before the test.After 157 days of flooding with a cumulative injection of 6534 m^(3),the viscosity reduction induced flooding proved effective in all production wells,and the cumulative oil production of the well group reached 856 t.Due to the significantly improved development,the oil recovery was predicted to increase by 11.0%,which has realized the transition from un-producing to effective producing of deep,low-permeability and sensitive heavy oil reservoirs.
作者
陈桂华
吴光焕
全宏
赵红雨
邓宏伟
韦涛
张伟
康元勇
CHEN Guihua;WU Guanghuan;QUAN Hong;ZHAO Hongyu;DENG Hongwei;WEI Tao;ZHANG Wei;KANG Yuanyong(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China;Xianhe Oil Production Plant,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China;Oil&Gas Development Management Center,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China)
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2021年第6期114-121,共8页
Petroleum Geology and Recovery Efficiency
基金
中国石化科技攻关项目“低效水驱稠油两相黏度调节剂研发与评价”(P18050-4)。
关键词
深层低渗透油藏
降黏引驱
敏感稠油
开发技术界限
提高采收率
deep and low-permeability oil reservoir
viscosity reduction induced flooding
sensitive heavy oil
development technology limit
EOR
