海上注水油田多压力注水系统可行性分析

FEASIBILITY ANALYSIS OF MULTIPLE PRESSURE WATER INJECTION SYSTEM FOR OFFSHORE OILFIELD

注水开发是海上油田开发的重要手段,尤其对于进入中高含水期的老油田,注水关系到了油田的稳产与增产。但是注水系统也是海上油田的耗能大户,占到了海上油田总能耗的30%~40%。目前国家对节能减排的要求越来越高,同时海上众多老油田由于电力紧张限制了产能的提高。目前海上注水开发油田一般仅设置一个压力等级的注水系统,对于注入压力低的注水井在井口对高压水源进行节流注入,造成了注水系统的大量能耗损失。文章从压力分配、能耗分析与经济对比等方面进行综合分析,论证多压力注水的可行性。

Water injection is important for offshore oilfield development,especially for the high water cut oilfield. Water injection system also consumes a large amount of energy,accounting for 30% ~ 40% of oilfield development energy consumption. At present,water injection system of offshore oilfield provides only one pressure rating,which leads to substantial energy loss for low pressure injection wells. In order to save energy,the water injection system was optimized and the multiple pressure water injection system was designed. At the same time,the feasibility of multiple pressure water injection system was analyzed based on pressure distribution,energy- saving effect and economic comparison. Field application results showed that the multiple pressure system could save energy over 20%.