敏感性稠油油藏水平井含水率预测模型研究  

Study on Water Cut Prediction Model of Horizontal Well in Sensitive Heavy Oil Reservoir

作　　者：罗宪波 LUO Xianbo(Tianjin Branch of CNOOC 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：《重庆科技学院学报（自然科学版）》2021年第2期1-5,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项“渤海油田加密调整油藏工程技术研究”(2016ZX05025-001-007)。

摘　　要：敏感性稠油油藏的水平井含水率变化比较复杂,其规律不易准确预测,数值模拟的历史拟合精度偏低。针对这一现象,建立敏感性稠油油藏水平井含水率数值模型,模拟预测含水率变化规律。首先,将不断降低的渗透率等价为不断增大的表皮因子,分别考虑速敏性、水敏性对近井地带和远井地带的影响,修正水平井流动的渗流阻力计算方程;其次,以分流量方程为基础构建含水率与表皮因子的关系式,绘制不同表皮因子下的分流率曲线,并且在数值模拟运算中加载了敏感储层渗透率随着开发不断变化的特征。The change of water cut of horizontal well in sensitive heavy oil reservoir is complex,and its law is not easy to predict accurately,so the history fitting accuracy of numerical simulation is low.Therefore,the water cut numerical model of horizontal well in sensitive heavy oil reservoir is established to simulate and predict the change law of water cut.Firstly,the decreasing permeability is equivalent to the increasing skin factor,considering the effects of velocity sensitivity and water sensitivity on near well zone and far well zone respectively to modify the seepage resistance calculation equation of horizontal well flow.Secondly,the relationship between water content and epidermal factor is constructed based on the partial flow equation,and the curves of split rate under different epidermal factors are drawn;moreover,the permeability of sensitive reservoir changes with development in numerical simulation.

关 键 词：稠油油藏 水平井 敏感储层 表皮因子 历史拟合精度 

分 类 号：TE243[石油与天然气工程—油气井工程]