摘要
为确定水平气井的最优长度,根据范子菲底水油藏水平井产能公式,利用气相渗流与液相渗流的相似原理,推导出底水气藏水平井产能公式,并将其与井筒耦合得出水平井产量随位置变化的关系式,以此为基础计算出水平井段最优长度。同时研究气层厚度、地层各向异性、井筒直径、管壁粗糙度对水平段最优长度的影响。结果表明,随着气层厚度、地层各向异性、井筒直径的增大所需要的水平井段最优长度也会相应的增加,而随着管壁粗糙度的增加水平段最优长度逐渐减小。
In order to determine the optimal length of the horizontal gas well,based on the productivity formula of horizontal well in bottom water reservoir proposed by Fan Zifei,the productivity formula of horizontal well in bottom water gas reservoir is derived by similar principle between gas seepage and liquid seepage.Based on the percolation in reservoir coupling with the flow in horizontal wellbore to devise horizontal well production relationship with position change,the horizontal section optimal length can be calculated.At the same time,this paper studies the impact of the gas layer thickness,formation anisotropy,wellbore diameter,wall roughness on the optimal length of the horizontal section.The results show that with the gas layer thickness,the formation anisotropy,the wellbore diameter increase the optimum length of the horizontal section also corresponding increase,and as the wall roughness increase the optimal length of horizontal section will gradually reduce.
出处
《重庆科技学院学报(自然科学版)》
CAS
2013年第5期61-64,共4页
Journal of Chongqing University of Science and Technology:Natural Sciences Edition
基金
国家重点基础研究计划(973计划)项目(2011CB201000)
国家油气重大专项(2011ZX05049-004)
关键词
水平气井
最优长度
影响因素
耦合
horizontal gas well
optimal length
influencing factors
coupling