塔河缝洞型碳酸盐岩油藏油井见水特征浅析

高产油井突然见水是影响塔河奥陶系缝洞型碳酸盐岩油藏开发的主要因素,常规油藏工程方法很难解释、预测油井突然见水及含水变化规律。多年开发实践中,尝试采用管流方法分析油井突然见水现象,与管流典型特征(漩涡现象、回流现象)对应,探讨见水后邻井干扰造成的影响和波动规律,初步建立以管流为基础的缝洞型油藏见水分析方法,探讨水推油见水后的挖潜措施和油藏治理方法。此研究对塔河奥陶系油藏的动态研究和综合治理、改善开发效果有一定的指导意义。

Water breakthrough characteristics in Tahe fracture-cavity carbonate reservoir

Abrupt water breakthrough in prolific oil wells is the main factor affecting Tahe Ordovician fracture-cavity carbonate reservoir development.It is hard to explain and predict the abrupt breakthrough and the rule of water cut change by conventional reservoir engineering method.Conduit flow method had been attempted in the past years to analyze abrupt water breakthrough in oil wells.The influence of adjacent well interference on production perfor-manceafter water breakthrough is discussed corresponding to typical characteristics of conduit flow(turbulence and backflow phenomenon).A preliminary analysis method of water breakthrough is established for fracture-cavity reservoirs based on conduit flow to research the measures for potential tapping and reservoir treatment.This study is of certain guiding significance to dynamic study,comprehensive treatment and improving development response in Tahe Or-dovician reservoir.