中国石油大学学报（自然科学版）2017，Vol.41Issue(4)：116-123,8.DOI:10.3969/j.issn.1673-5005.2017.04.015
多段压裂水平井不均匀产油试井模型
A pressure transient analysis model of multi-fractured horizontal well in consideration of unequal production of each fracture
摘要
Abstract
In this study, the effect of unequal production of each fracture ( UPEF) on well testing behavior was considered in order to develop a pressure transient analysis ( PTA) model for multi-fractured horizontal wells ( MFHW) , and semi-analyti-cal solutions were given based on the Green's function, the Newman's product method and superposition principles. The flow in a hydraulic fracture is divided into two flow regimes ( i. e. a variable-mass linear flow far from the horizontal wellbore and a radial flow near the horizontal wellbore) to characterize the finite conductivity flow within the fractures. Then, characteris-tic pressure curves were obtained using a numerical Stehfest inversion algorithm, and sensitivity analysis ( e. g. UPEF, frac-ture and parameters) was further conducted. The analysis results indicate that there are obvious differences among the type curves obtained via assuming an equal production of each fracture ( EPEF) and the UPEF. The early-radial flow behaves as a horizontal line in the pressure derivative curves when the fractures located at the ends of wellbore contribute much more to total oil production than those at the middle section, or when the fractures are wide-spaced and short, or when the fractures behave as spindle shape. In comparison with the classic PTA model of the MFHW in Saphir software, the accuracy and relia-bility of the newly proposed model has been proven.关键词
水平井/不均匀产油/试井分析/格林函数/Newman乘积方法/典型曲线Key words
horizontal well/unequal production of fractures/pressure transient analysis/Green's function/Newman's prod-uct method/type curves分类
能源科技引用本文复制引用
何佑伟,程时清,胡利民,方冉,李双,汪洋,黄瑶,于海洋..多段压裂水平井不均匀产油试井模型[J].中国石油大学学报（自然科学版）,2017,41(4):116-123,8.基金项目
国家科技重大专项(2016ZX05009-004,2016ZX05013001-005) （2016ZX05009-004,2016ZX05013001-005）
