熔岩流单元测井响应模式

LOGGING RESPONSE MODEL FOR LAVA FLOW UNIT

该文据潍北凹陷实际勘探资料,以研究熔岩流地质相模式为基础,建立与其相对应的测井相模式,找出了各种熔岩流地质相与测井响应特征之间的规律性关系,并据△t(声波时差)及p(密度)与熔岩原生气孔含量(A)的统计对应关系,提出了求熔岩气孔含量的关系式,从而可应用测井资料,有效地来识别和划分井下熔岩储层的各岩相段,并能定性解释其储集物性和作出有利储集层段的预测与评价。

In order to establish corresponding logging facies model, the regular correlations between geofacies of various lava flows and logging response characteristics were defined with the basis of the study of the geofacics model of lava flows and the practical logging exploration data from Weibei depres-sion(in Shandong province).Furthermore, the correlative statistical relations of △t ( acoustic time ) and p ( density ) with primary porosity of lava were obtained,and an expression of achieving the pore contents of lava was proposed. Thus, logging data can be applied to identify and divide the litho-facies members of downhole lava reservoirs and to make qualitative interpretation of their physical properties, and to predict and evaluate favourable reservoirs.