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油藏的开采期一般平均为 2 0多年 ,但有许多油藏已开采了 50多年。通常 ,发展的工业技术先是钻井 ,以相对分散的井距开采低硫原油区 ,然后以加密井和 /或二次、三次采油法逐步且长期地从油藏中开采越来越多的原油。水力压裂作业、水平井和多支井提供了多种方法 ,极大地提高了产量 ,但是这些技术是否能提高最终采收率还是个问题。本文介绍了革新的π -模式生产策略 ,该策略可在短时间内使油藏生产达到峰值 ,而且还能获得以此速度采出至少 50 %的现有地下原油储量 (OIP)的目标采收率 ,并从经济上考虑那时应停止开采。由此 ,油田的生产曲线将遵循希腊字母π的形状。
The average recovery period of a reservoir is more than 20 years, but many reservoirs have been mined for more than 50 years. Often, developing industrial technologies are drilling, first of all, the exploration of low-sulfur crude oil areas at relatively well-spaced well intervals, and then the progressive and long-term extraction of more and more crude oil from reservoirs using infill wells and / or secondary and tertiary recovery processes. Hydraulic fracturing operations, horizontal wells, and multiple wells provide many ways to dramatically increase production, but whether these technologies can improve ultimate recovery is still a problem. This paper presents an innovative π - mode production strategy that peaks production in a short period of time but also achieves a target recovery rate of at least 50% of existing underground crude oil reserves (OIPs) at this rate Rate, and from the economic considerations should then stop mining. As a result, the oilfield production curve will follow the Greek letter π shape.