摘要
为了实现稠油油藏井间动态连通情况的定量评价,针对稠油油藏仅原油相流动存在启动压力梯度的特点,推导建立了稠油油藏的产量描述模型,在此基础上,根据系统分析思想和物质平衡原理,仅利用油田的累积产液量和累积注水量建立了稠油油藏注采连通计算新模型,并利用最小二乘原理和智能算法进行求解得到连通系数。连通系数越大,注采连通关系越好。现场应用表明,模型的计算结果与动态监测结果一致,对评价为注水非均质的井组开展调剖后,井组含水下降约1%~4%,单井增油5~10方,具有一定的实践推广价值。
In order to achieve quantitative evaluation of interwell dynamic connectivity in heavy oil reservoirs,the production description model of heavy oil reservoir is derived,which considering the threshold pressure gradient of crude oil flow.On this basis,according to the system analysis thought and the material balance principle,the model is established by the cumulative water injection data and the cumulative liquid production data.The model is solved by using the least squares principle.The bigger connectivity coefficient is,the better interwell connectivity is.The field application shows that the model calculation results are basically consistent with the dynamic analysis results,and have certain popularization value.After profile control for wells evaluated as water injection heterogeneity,water cut in wells decreased by about 1%~4%,and oil production increased by 5~10 cubic meters per well.
作者
陈存良
王雨
何芬
赵汉卿
姚君波
Chen Cunliang;Wang Yu;He Fen;Zhao Hanqing;Yao Junbo(Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)
出处
《非常规油气》
2019年第4期46-48,87,共4页
Unconventional Oil & Gas
基金
国家科技重大专项“渤海油田高效开发示范工程”(2016ZX05058)
中海石油(中国)有限公司科技攻关项目“渤海双高油田挖潜关键技术研究”(YXKY-2018-TJ-04)联合资助
关键词
稠油
连通性
启动压力梯度
物质平衡
遗传算法
heavy oil
connectivity
threshold pressure gradient
the material balance principle
genetic algorithm
