摘要
为了真实反映气井和气藏生产情况,研究了压力恢复试井在某区块的应用情况。通过对压力恢复试井曲线及气井动态生产特征的研究,确定了气井的地层系数、表皮系数和地层压力等地层参数及边界情况等。现场应用得出了用整个地层系数来评价压裂效果、用井筒表皮系数来识别污染程度、用边界流来判断是否存在边底水,以及通过外推法来求取低渗透储层目前地层压力的新认识及新成果,完善了储层的动态模型,为气井动态预测提供了有力的依据。
The application of pressure build-up test in a block was carried out in order to reflect the actual production conditions of gas wells and gas res-ervoirs and provide proposals for next production.Through the research on pressure build-up test curves and dynamic production features of gas wells,the formation coefficient,skin coefficient,formation pressure,other format ion parameters and boundary conditions of gas wells were determined.New recogni-tions and new achievements were gained through field application that used the whole formation coefficient to evaluate fracturing effect,the wellbore skin coefficient to identify pollution degree,the boundary flow to judge w hether the edge-bottom water existing or not,and the extrapolation method to acquire current formation pressure of low-permeabilty reservoirs.The dynamic model for reservoirs was improved to provide the powerful basis for dynamic gas well prediction and to guarantee the steady production of gas wells.
出处
《采油工程》
2015年第3期69-74,82,共7页
Oil Production Engineering
关键词
压力恢复试井
地层系数
井筒表皮系数
低渗透储层
动态模型
pressure build-up test
formation coeficient
wellbore Skin
l0W-permeabilityI reservoir
dynamic model
