基于水淹评价的多层合采井含水率预测方法  

Water Cut Prediction for Multi-layer Production Well Based on Quantitative Evaluation of Water Flooding

作　　者：陈晓明 李志愿 赵汉卿 吴晓慧 常会江 CHEN Xiao-ming;LI Zhi-yuan;ZHAO Han-qing;WU Xiao-hui;CHANG Hui-jiang(CNOOC Tianjin Branch,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：《承德石油高等专科学校学报》2022年第4期14-19,48,共7页Journal of Chengde Petroleum College

摘　　要：针对多层油藏双高阶段局部调整过程中新井综合含水难以准确预测的问题,以水淹层测井响应特征为切入点,在水淹定量评价的基础上,结合水电相似原理和两相渗流理论,建立了多段油层合采井综合含水率定量表征模型。解析式表明,与综合含水率直接相关的两个动态参数为单层段的流度和含水率,可通过测井解释的驱油效率换算得到。以渤海某注水开发油田Sand-2砂体为例,基于水淹定量评价结果,结合油藏工程方法对7口井投产初期的含水率进行预测,投产动态表明,新方法预测准确度较高,弥补了目前矿场多层油藏综合含水率预测方法的局限性。To predict water cut of infilled wells during the adjustment process of multi-layer reservoir,well logging response of the water flooded layer is studied.Based on quantitative evaluation of water flooding,combined with the principle of hydropower similarity and two-phase seepage flow theory,a new model of water cut prediction is established.The analytical formula shows that the key parameters related to water cut are fluidity and the water cut of each layer,which can be obtained from infilled well logging.Taking Sand-2 as an example,based on the results of quantitative evaluation of water flooding,combined with reservoir engineering methods,the water cut of seven wells in the initial stage of development is predicted.The production data show that this new method is more accurate,which makes up for the limitations of current method for predicting water cut of multi-layer reservoirs.

关 键 词：多层油藏 含水率预测 水淹定量评价 两相渗流 渤海油田 

分 类 号：TE256[石油与天然气工程—油气井工程]