电缆地层测试多井参数产能预测新方法

New method of deliverability forecasting by wireline formation testing with multi-well parameters

现有电缆地层测试(WFT)产能预测方法因其还无法达到中途测试(DST)产能预测精度,且存在较大误差。目前,通过基于地质统计学的多井多参数储层横向预测技术,拓展了WFT的探测半径,得到了考虑储层不等厚的平均厚度评价方法和考虑非均质性、各向异性的平均渗透率计算方法,在此基础上得到的多井参数WFT产能计算方法更接近储层实际地质情况,从而提高了WFT产能预测精度。

Deliverability torecasting precision of existing wireline formation testing（WFT） fails to agree with that of drillstem test（DST） , and considerable error exists, the main reasons are shorter investigation radius and the assumption of reservoir homogeneous and isotropy. Investigation radius was extended by reservoir lateral forecasting of multiple wells and multiple parameters based on gcostatistics. Meanwhile, the calculating methods of reservoir average effective thickness considering its no uniform thickness and average effective permeability considering its heterogeneity and anisotropy were obtained. The reservoir actual situation can be described by the new method, and the deliverability forecasting precision could be improved.