低渗裂缝性气藏产能分类方法

Research on Productivity Classification Method of Low-permeability Fractured Gas Field

迪那2气田为超高压低渗裂缝性凝析气藏,非均质性强。根据该气田岩心、测井、测试等资料,分析单井产能与裂缝及基质物性之间的关系,在此基础上综合单井裂缝段厚度、裂缝密度、裂缝开度和基质KH值,利用Q型聚类法将开发井划分为3类,并将已分好类的气井作为样本利用线性回归建立了分类判别函数,判别结果与聚类法分类结果吻合程度高,为迪那2气田产能分类评价和开发技术政策制定提供了依据。

Dina 2Gasfield is an ultra-high pressure,low-permeability fractured condensate gas reservoir with high heterogeneity.The relationship among single well production,fractures and physical properties of the matrix is analyzed by core,logging and test data.On the basis of the results,development wells are divided into 3classes by using Q-type cluster analysis,synthesizing thickness of fractured intervals,fracture density,fracture aperture and KH value of matrix.Taking the classified gas wells as samples,classification discriminant function is established based on linear regression,and its results are in agreement with the ones of clustering method.Therefore,the results provide a reasonable basis for productivity classification evaluation and policy making of development technology in Dina 2Gasfield.