聚驱后水驱油藏层间窜流试井曲线特征  

Characteristics of Interlayer Crossflow Well Test Curve in Water Drive Reservoir after Polymer Flooding

作　　者：瞿朝朝 刘宗宾 王欣然 刘斌 张振杰 QU Zhaozhao;LIU Zongbin;WANG Xinran;LIU bin;ZHANG Zhenjie(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：《广东石油化工学院学报》2022年第3期21-25,共5页Journal of Guangdong University of Petrochemical Technology

基　　金：国家科技重大专项(2016ZX05058-001)。

摘　　要：基于渗流力学理论,重构了描述层间窜流及平面非均质性的数学模型,运用有限差分算法得到各层井底压力的瞬时解,并绘制出压力曲线和压力导数曲线图版。研究表明:地层中流体从低渗层向高渗层窜流过程中,压力导数曲线表现出“凹子”特征;外区聚合物溶液的非牛顿特性,使压力导数曲线出现复合特征,呈抬升状,且两区总流动段压力导数曲线末期上翘。利用该理论图版对渤海A油田复杂井的压降资料进行解释,得到储层物性参数,成功指导油田低产低效井治理。Based on the theory of percolation mechanics,the mathematical model describing the interlayer interflow and plane heterogeneity is reconstructed,and the instantaneous solution of each layer bottom hole pressure is obtained by using the finite difference algorithm,and the pressure curve and pressure derivative curve plate is drawn.The results indicate that the pressure derivative curve shows the feature of"concave"in the process of fluid flowing from the low permeability layer to the high permeability layer.The non-newtonian characteristics of the polymer solution in the outer zone make the pressure derivative curve appear compound characteristics,showing uplift,and the final stage of the pressure derivative curve in the total flow section of the two zones is upturned.Under the guidance of this theoretical chart,the pressure drop data of complex wells in Bohai Oilfield A are interpreted to obtain reservoir physical property parameters,which successfully guides the treatment of low production and low efficiency wells in the oilfield for 5 times.

关 键 词：聚驱后水驱 试井解释 层间窜流 牛顿-非牛顿 压力导数 

分 类 号：TE357[石油与天然气工程—油气田开发工程]