摘要
目前大量试井模型仅仅适用于注水油藏大孔道的识别,对注聚油藏并没有研究,导致许多注聚油田实际数据无法解释。通过考虑聚合物剪切、扩散和对流的特征,建立了聚合物驱大孔道油藏试井解释模型,采用有限差分算法对模型进行数值求解,绘制压力和压力导数双对数典型曲线图版。典型曲线的压力和压力导数曲线都呈上扬的趋势,但聚驱比水驱压力降落更大,压力导数上翘的斜率更小。分析了聚合物浓度、渗透率比值、大孔道宽度等参数对典型曲线的影响。实例应用表明该模型能有效解释大孔道的相关参数,为大孔道的封堵提供数据支持,具有较强的矿场应用价值。
For a large number of present well testing models are only for the identification of the high-capacity channel oil reservoir flooded by the water,and furthermore there is no corresponding study on the polymer flooding,therefore the actual data of many polymer flooded oilfields can not be interpreted.Considering the characteristics of the polymer shear,diffusion,and convection,the well test interpreting model of the polymer flooded high-capacity channel reservoir was established,with the help of the finite difference method,the numerical solution of the model was achieved,and moreover the chart board of the log-log typical curve between the pressure and pressure derivative was mapped.The rising trends are shown for the pressure and pressure derivative curves of the typical curve,but the pressure drop of the polymer flooding is much more serious than that of the water flooding,and furthermore the upward slope of the pressure derivative is more smaller.The influences of the polymer concentration,permeability ratio and width of the high-capacity channel and so forth on the typical curve were analyzed.The application of the case shows that the model can effectively interpret the relevant parameters of the high-capacity channel and provide the data support for the block of the high-capacity channel,thus the much stronger field application valuewas presented.
作者
曾杨
康晓东
谢晓庆
石爻
ZENG Yang;KANG Xiaodong;XIE Xiaoqing;SHI Yao(State Key Laboratory of Offshore Oil Exploitation, Beijing 100028, China;CNOOC Research Institute, Beijing 100028, China J)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2018年第2期130-134,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项"海上油田化学驱油技术"(2016ZX05025-003)
中海石油有限公司综合科研"海上多层稠油油藏化学驱交替注入技术研究"(YXKY-2014-ZY-03)联合资助
关键词
聚合物驱
大孔道
试井解释
压力动态
曲线拟合
polymer flooding
high capacity channel
well test interpretation
pressure behavior/dynamic
curve matching/fitting
