关键词: 参数优化设计, 油井产能, 射孔完井, 射孔参数, 负压射孔, 产能预测, 影响因素, 钻井, 表皮系数, 产能比

Abstract: High quality perforation is an important project in well completion for the purpose of formation protection and damage prevention.This paper,based on the results of modeling of well perforation by means of an electric resistance network and those obtained by a finite element technique,gives a comprehensive analysis of the effects of various factors on well productivity,such as perforation parameters,perforation damage,damage during drilling,and anisotropy of the reservoir formation etc.The relative importance of various factors are analysed and they are presented according their relative importance.A regressive equation including the above factors and a corresponding nomogtram are presented.Thus it is easy and convenient to predict the well prodictivity with different combination the above factors,and an optimyzed design of the perforation parameters can be carried out easily also.This paper also suggests contents,mothod and procedures in volved in an optimum design of well perforation operation.Results of field application(in Huabei oil field)show that well productivity is increased by 15-25%.Practices show that a comprehensive and accurate evaluation of the well productivity after perforation,reasonable choice of perforation parameters and an optimum perforation design have a significant economical benefit and a high practical significance.