电缆地层测试油气层产能预测技术研究及应用

An Approach for Reservoir Yield Prediction Using WFT and Its Applications

在海上进行油气层测试作业成本高。研究了使用作业成本较低的电缆地层测试仪器进行测量,应用经典油气层产能方程预测油气层产能的方法。由电缆地层测试器测量出的压力剖面通过曲线拟合方法计算地层渗透率和表皮系数等产能预测所需参数;并利用海上已完钻井的高压物性分析资料、电缆测试器所采集流体样品的现场高压物性分析资料和所测量的气油比求取了用于油气层产能计算的流体参数,计算出油气层的单层日产量和采油指数。海上应用实例表明在海洋勘探工作中可利用该方法部分代替钻杆测试技术。

It is expensive to do reservoir test in the offshore oilfield. Studied is a method to predict pay zone yield by measuring with low cost Wireline Formation Test （WFT） and calculating with traditional yield formula. Reservoir permeability, skin factor of the formation and other pa- rameters for yield prediction are calculated by curve fitting of the pressure data from the wireline formation tester. Fluid parameters for yield prediction are computed by using the high pressure physical property data from previously drilled wells and measured by wireline formation tester on the spot, the gas/oil ratio data measured by wireline formation tester. Then the yield per layer in a day and the production index are calculated. Application examples show that wireline formation tester can partly replace drill stem test in offshore oilfield exploration in China.