摘要
海上油田开发具有时效性,在控制产量递减率的基础上保持较高的采油速度,是海上油田获得开发效益的基本要求。基于海上油田开发特点和开发需求,建立海上油田水驱开发后期合理采油速度的确定方法及步骤:一是建立油田不同开发阶段生产能力的评价方法,以确定油田开发后期最大和可行的采油速度范围;二是制作不同采液速度下,油田产量递减率与含水率和可采储量采出程度的关系图版,以确定满足递减率限制的采油速度;三是根据油田开发经济收益界限要求,确定油田最低采油速度;最后,综合考虑油田生产能力条件、稳产和递减控制要求以及经济技术界限等,确定海上油田开发后期合理采油速度范围。利用建立的方法对海上PLA-3油田进行了分析,结果表明,此方法操作简单,计算结果更符合实际开发特点,具有良好的可操作性。
The development of offshore oilfield has time limited efficacy. Based on controlling the production decline rate, keeping high rate of oil production is the basic requirement for the development benefit of offshore oilfield. Based on the characteristics and development requirements of offshore oilfield development, it was established a method and steps for determining the reasonable rate of oil production in the later stage of waterflooding development of offshore oilfield. Firstly, to determine the maximum and feasible rate range of production, it was established the evaluation method for the production capacity at different development stage. Secondly, under different rates of fluid production, it was made the re- lation chart among the production decline rate, the water cut, and the recovery degree of recoverable reserves, to deter- mine the oil production rate which can meet the limit of decline rate. Thirdly, according to the economic benefit limit of oilfield development, the lowest rate of oil production was determined. Finally, overall considering the conditions of oil- field productivity, requirements of stable production and decline control, and economic and technical limits, it was determined the reasonable rate range of oil production in the later stage of offshore oilfield development. The method was applied in PLA -30ilfield. The application results indicated that the method is simple and feasible, and the calculation resuits are closer to the actual.
出处
《复杂油气藏》
2017年第4期51-55,59,共6页
Complex Hydrocarbon Reservoirs
基金
国家科技重大专项课题子课题"油气资产价值评估体系集研究"(NO.2016ZX05033005007)
关键词
海上油田
采油速度
生产能力
递减规律
注采界限
offshore oilfield
oil production rate
production capacity
decline rule
injection - production limit
