应用EcoScope多功能随钻测井判别水平井流体性质

Using EcoScope Multi-function LWD to Differentiate Fluid Property in Horizontal Wells

介绍了在四川广安地区应用EcoScope多功能随钻测井资料判别储层流体性质的方法,探讨了双频电阻率绝对值法、方位铯密度和热中子孔隙度重叠法、GR-Σ交会法3种新方法在水平井中判别流体性质的可行性。通过对广安地区6口井的双频电阻率阵列测井资料分析,在79个解释层中,55个层有试油结果,证明用相位移电阻率的绝对值高低判别广安地区水平井储层流体性质的方法是可行的。在水平井中可采用方位铯密度与热中子孔隙度叠加法识别气层。广安地区有试油的2口水平井的55个试油层实际判别结果表明:双频电阻率绝对值法、方位铯密度和热中子孔隙度重叠法在该区的符合率较高;GR-Σ交会法由于没有获得试油资料,仅作为参考。在实际应用时3种方法可相互取长补短,形成有效的流体性质识别方法组合。

Introduced are examples using EcoScope muhifunction I.WD to differentiate fluid property in Guang＇an, Sichuan province. Analyzed is feasibility to identify the fluid property with the following 3 methods ： （1）dual frequency resistivity method ; （2）position cesium density thermal neutron porosity method and （3）GR-∑, method. By analyzing the dual-frequency resistivity log data, we determined 79 possible oil layers in 6 wells, 55 of them was proved to be payzones. It was shown that we can identify reservoir fluid property by using absolute value of phase displacement resistivity in horizontal wells of Guang＇an area. It is better to use the second method to identify gas layer in the horizontal well. Through oil testing of 55 layers in 2 horizontal wells in Guang＇an area, it is concluded that the first and second method work much better in this area; and the third method is just a reference because of no oil testing information. In practical log, applications, the 3 methods can work together to form an effective way to determine the fluid property.