摘要
酸压后裂缝的几何形态、有效作用距离、酸蚀裂缝导流能力以及气井产能是进行酸压经济评价的重要参数。在考虑裂缝导流能力受生产压降、非达西效应、储层污染等因素影响的基础上,建立了三维酸压动态预测模型;通过计算及图版分析,认为裂缝闭合应力和非达西效应使气井产量下降。设计合理的裂缝导流能力和几何尺寸是经济增产的重要手段。
Fracture geometry,effective distance, conductivity of acid corrosion fracture and gas well productivity after acid fracturing are the important parameters for the economic evaluation of acid fracturing. The forecast model of 3-D acid fracturing performance is set up by considering that fracture conductivity is influenced by the factors such as producing pressure drop,Non-Darcy effect,reservoir contamination etc. It is suggested that the fracture closure stress and Non-Darcy effect make gas well production drop down.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1996年第1期50-55,共6页
Natural Gas Industry
关键词
碳酸
气井
三维酸压
闭合应力
酸化压裂
Gas well, 3-D acid facturing, Closure stress, Nondarcy flow, Reservoir contamination, Prediction.
