启动压力梯度影响下低渗透气藏水平井产能模型的建立  

Horizontal well deliverability model of low permeability gas reservoirs considering threshold pressure gradient

作　　者：杨学云[1] 张学婧[1] 蒋国斌[1] 曲占庆[2] 

机构地区：[1]中油大庆油田有限责任公司,黑龙江大庆163453 [2]中国石油大学,山东东营257061

出　　处：《特种油气藏》2010年第1期85-87,共3页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金项目"水平井压裂改造及砾石充填防砂技术研究"(50274055)

摘　　要：将气藏中的流动区域分为达西流动区域和非达西流动区域2部分,气藏水平井湍流只发生在水平井附近短半轴小于10个井半径的旋转椭球体内,而达西流动存在于此椭球体外。借助前期水平井研究成果,考虑启动压力梯度对低渗透气藏中气井产能的影响,推导出低渗透气藏水平井新型产能模型。新模型考虑了启动压力梯度对水平井产能的影响,对水平井产能预测研究有重要意义。The flow regimes in a gas reservoir are divided into Darcy flow and non-Darcy flow regimes. The turbulence of horizontal gas wells only happens in the rotary ellipsoid with short semi-axis less than 10 radius of the well bore, while the flow outside the ellipsoid fits Darcy’s law. Based on previous study of horizontal wells, a new deliverability model of horizontal gas well in low permeability gas reservoir has been derived with consideration of the influence of threshold pressure gradient. The model is very helpful to prediction of deliverability of horizontal gas wells.

关 键 词：启动压力梯度 水平井 产能模型 低渗透气藏 产能预测 

分 类 号：TE33[石油与天然气工程—油气田开发工程]