Maximize the Recovery Factor of Offshore High Water Cut Reservoir

Abstract

As the Offshore oilfields enter the high water cut stage, it encounters new and prominent problems such as difficulty in developing remaining oil, increased water breakthrough and rapid decline in production. How to maximize the recovery of high water cut offshore reservoirs and improve economic efficiency is a challenge. This paper reviews the lessons learned on how SZ field improves water injection to stable reservoir pressure. Architecture unit-based well pattern improvement, Increasing injection and big-pump enhanced liquid production including renovation and capacity expansion of Water treatment system; Polymer flooding, Modifying reservoir flow pattern with Gel Treatment, Polymer Microspheres. The wells display positive responses from the water injection. The responses include stable reservoir pressure, slower production increase, and slightly water cut increase. Enough and high quality water injection is extremely essential to maximize the recovery of a mature offshore heavy oil.