考虑油气水三相流的水平井产能计算新方法  

A new method for calculating horizontal well productivity considering oil-gaswater three-phase flow

作　　者：彭琴 刘斌 刘春艳 杨东东 郭敬民 PENG Qin;LIU Bin;LIU Chunyan;YANG Dongdong;GUO Jingmin(Bohai Petroleum Research Institute of Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《复杂油气藏》2023年第4期444-448,共5页Complex Hydrocarbon Reservoirs

基　　金：国家重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)。

摘　　要：渤海C油田明化镇组以强底水油藏为主,地饱压差小,采用水平井高速开发。该类油藏水平井产能预测需同时考虑含水率上升和脱气的影响,前人研究的水平井产能公式大多只考虑单相流或两相流,鲜少有考虑油气水三相流,对此在Joshi水平井产能一般公式的基础上,将油、气、水三相渗流区进行微元处理,结合流体高压物性参数的拟合函数,推导局部脱气的三相流水平井产能计算公式。该公式在渤海C油田得到很好的实际验证,同时,通过计算不同含水阶段生产压差与日产油关系曲线,得到不同含水阶段水平井脱气对产能的影响程度,为低地饱压差底水油藏水平井产能预测和合理工作制度的确定提供依据。The Minghuazhen Formation of C Oilfield in Bohai Sea is dominated by strong bottom-water reservoirs with slight ground saturation pressure differences and developed by high-speed horizontal wells.The productivity prediction of horizontal wells in this type reservoir must simultaneously consider the influence of water cut increase and degassing.Most horizontal well productivity formulas studied by previous researchers only consider the single-phase or two-phase flow and rarely consider the three-phase flow of oil,gas,and water.Based on the general formula for horizontal well productivity of Joshi,the three-phase seepage zone of oil,gas,and water is processed by micro-element and combined with the fitting function of fluid high-pressure physical parameters,it is derived from the productivity calculation formula of three-phase flow horizontal well with local degassing.The formula is well verified in the C Oilfield in Bohai Sea.Meanwhile,by calculating the relationship curves between production pressure difference and daily oil production in different water-cut stages,the influence degree of degassing on the productivity of horizontal wells in different water-cut stages is obtained,which provides a basis for the productivity prediction and reasonable working system determination of horizontal wells in low land-saturated pressure difference bottom-water reservoirs.

关 键 词：底水油藏 水平井 三相渗流 产能计算 工作制度 

分 类 号：TE312[石油与天然气工程—油气田开发工程]