利用压力恢复数据预测非均质地层渗透率分布

Predicting Permeability Distribution in Heterogeneous Reservoir by Buildup Pressure Data

由于大量非均质油藏的存在,利用试井资料及其他动态资料求取地层参数、描述油藏的非均质性倍受关注。综合运用油气渗流理论、特殊函数、数值计算方法,对利用压力恢复数据预测非均质地层渗透率分布的问题进行了研究。结果表明,在关井前很短时间内记录下压降数据,可以校正压力恢复数据,基本消除油井生产时间所带来的影响;对校正的压力恢复数据采用ISA法可以得到近似的油藏渗透率分布,该分布的精度与从定产量压降测试所获得的渗透率分布基本相同。

Because of so many heterogeneous reservoirs,it is the hotspot that using the well test data and other dynamic data to calculate the formation parameters,describe the heterogeneous of reservoir.By using oil and gas percolation theory,comprehensively,special function,numerical simulation,the question about predicting permeability distribution in heterogeneous reservoir by buildup pressure data is discussed.The result showed that buildup data can be corrected if pressure drawdown data is recorded in the short time before close well,which can basically eliminate influence brought by production time of oil well,and to buildup data being corrected,by using method of ISA,permeability distribution of reservoir can be similarly get,whose precision is same as that of permeability distribution got from pressure drawdown testing with constant production.