文昌A油田隔夹层分布及其对开发效果的影响

Interlayer insulation distribution of Wenchang-A oilfield and its influence on development effect

文昌A油田ZJ2-1U油组经过多年开采目前已进入中高含水期,控水稳油是当前面临的生产难题。针对该油田井网不规则、井点资料少但三维地震数据品质高的特点,充分利用密闭取心井资料以及伽马、声波、中子等测井资料,首先从密闭取心井识别隔夹层,然后从取心井标定非取心井,应用神经网络算法对非取心井隔夹层进行识别;继而采用沉积相控及伽马反演数据体约束下井震结合方式,运用序贯指示方法预测隔夹层在井间及三维空间的分布;最后,动静态结合,从隔夹层角度揭示对开发效果的影响,为剩余油挖潜及提高油田采收率提供依据。

After many years of production,ZJ2-1U oil reservoir of Wenchang-A oilfield has entered the high water-cut stage and how to control water distribution and stable oil production has become the big problem at present.Aiming at the characteristics of irregular well pattern,less data and high quality of 3D seismic data,closed coring well data can be fully applied.In combination with gamma,acoustic and neutron logging data,first of all,the interlayer insulation can be identified from closed coring well.Secondly,from the coring well,the non-coring wells can be calibrated,and by using neural network algorithm,the interlayer insulation of non-coring wells can be identified.Then by using wellseismic combination method of sedimentary facies and gamma inversion data volume and with the method of sequential indicator,the interlayer between the wells and in3 D spatial distribution can be predicted.Finally,combined the dynamic and static,the impact of the interlayer insulation on the development effect can be revealed,which can provide the guidance for residual oil extraction and increase oil field recovery.