特高含水老油田断层附近高效井优化设计

OPTIMIZED DESIGN OF HIGH-EFFICIENCY ADJUSTING WELLS NEAR THE FAULTS OF HIGH-WATERCUT MATURE OILFIELD

大庆油田通过特高含水期精细开发地震应用技术研究,创新了以密井网约束三维速度场时深转换、"井断点引导"小断层解释为特色的井震结合精细构造描述技术,准确刻画了断层空间展布特征。在断层附近由原来"躲断层"向"靠断层"、"穿断层"转变,形成了断层附近高效调整井优化设计方法,解放了断层区的调整潜力。针对不同潜力类型部署设计不同类型的高效井,有效挖掘受断层遮挡形成的剩余油,取得了成功经验及显著的增储增油效果。

By means of the studies on the applied techniques of fine production seismology for extra-high-watercut Daqing Oilfield, the well-commingled seismic characterizing techniques are developed for the fine structures fea- tured by the time-depth conversion in 3 D velocity field constrained by the dense well pattern and small faults inter- pretation guided by the faulted points of the wells, thus the spacial spread features of the faults are accurately char- acterized. The adjusting form nearby the faults is inverted from the original “avoiding the faults” to “get closer to the faults” and “penetrate the faults”, so the optimized design method for the high-efficiency adjusting wells closer to the faults is established, therefore the adjusting potentials in the fault area can be tapped. In the light of the dif- ferent types of the potentials, the high-efficiency wells with different kinds are designed and arranged to effectively tap the remained oil resulted from the fault barrier and furthermore the successful experiences and remarkable incre- mental effects in the reserves and oil production are achieved.