分段打开水平井试井解释模型及应用  

Model and application of well testing interpretation for segregated opened horizontal well

作　　者：李其正 孙召勃 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《断块油气田》2016年第6期758-762,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项专题"海上油田丛式井井网整体加密及综合调整油藏工程技术应用研究"(2011ZX05024-002-007)

摘　　要：针对应用越来越多的分段打开水平井,文中考虑段间干扰,利用拉普拉斯空间中点源函数叠加的方法,建立了不同顶底边界的分段打开水平井试井解释模型,利用数值反演得到典型压力曲线和沿程流率分布曲线,并分析了分段打开模式对曲线的影响。分析结果表明:由于干扰作用影响,端部打开段的生产能力要大于中部打开段的生产能力;对于顶底定压或混合边界,可用相同生产长度的完全打开水平井进行解释;对于顶底封闭边界,需要用分段打开水平井试井模型进行拟合解释。实例应用证明了模型的可靠性。In view of the increasing applications of segregated opened horizontal well, this paper considers the interferences between different sections and establishes a well testing interpretation model for segregated opened horizontal well with different top and bottom boundaries by employing the superposition of point source function in Laplace space. The type curves and rate distribution curves are obtained using numerical inversion. The influence of the segregated completion is analyzed. The results shows that the production capacity of the tip completion sections is higher than the middle sections because of the interference. For constant pressure top and bottom boundaries and mixed boundaries, the entirely completed horizontal well with the same production length can be used for the interpretation, but for sealed top and bottom boundaries, the segregated opened horizontal well model is needed for the interpretation. Eventually, a field case application of the proposed model is given, and the parameters are successfully interpreted.

关 键 词：水平井 分段打开 试井分析 数学模型 流率分布 典型曲线 

分 类 号：TE353[石油与天然气工程—油气田开发工程]