复杂裂缝性油藏历史拟合中的特殊做法

克拉玛依油田八区 上二叠统下乌尔禾组油藏是一个具有边底水的特低渗透裂缝性巨厚砾岩油藏,在油藏数值模拟研究过程中,针对油藏的具体特点,对“非油层”出油问题、注入水漏失问题、水淹水窜井问题、地层水侵入问题以及不同水驱油模式问题采取了一些特殊做法,对400多口井、23年的生产历史进行了精细拟合,单井的压力、含水率拟合符合率达85%以上。获得了很好的拟合结果,为类似油藏的数值模拟提供了可供借鉴的经验,这些做法可推广应用于其它低渗透裂缝性油藏。

The Special Approach for History Match of A Complex Fractured Reservoir

Lower Wuerhe reservoir of Upper Permian in District No.8 of Karamay oilfield is a massive fractured conglomerate reservoir with edge-bottom water and extra-low permeability. This paper presents the numerical simulation studies of the complex fractured reservoir. In view of its characteristics of non-pay zone yielding, injected water leakage, watered-out and water breakthrough well, formation water inflow and different waterflooding models, several approaches for detailed history matching are adopted to over 400 wells for 23-year production, and single well pressure and water cut simulation reach the coincidence rate of 85%. These simulated results could be as a guide for numerical simulation of another similar reservoirs, and these special approaches could be applicable in other fractured low permeability reservoirs.