火山岩风化壳储层发育模式及测井划分方法

Development model and logging division method of volcanic weathering crust reservoir

近年来在准噶尔盆地火山岩顶部风化壳油气藏勘探获得重要发现,但是对风化壳储层结构特征认识不清,缺乏有效的测井划分方法。以准噶尔盆地中拐凸起石炭系为例,通过地质和测井资料对火山岩风化壳结构、响应机理及发育模式进行系统性分析,基于测井曲线响应特征建立风化壳指数模型,形成了一种火山岩风化壳储层结构的测井评价方法。为寻找风化壳优势储层及后期的试油射孔提供了参考,并取得了较好的应用效果,对后期火山岩风化壳油气藏勘探开发具有重要的指导意义。

In recent years,important discoveries have been made in the exploration of the weathered crust reservoirs on the top of the volcanic rocks in Junggar Basin.However,the structural characteristics of the weathered crust reservoirs are not clearly understood,and there is no effective logging division method.This paper takes the Carboniferous of Zhongguai uplift in Junggar Basin as an example,systematically analyzes the structure,logging response mechanism and development models of the volcanic weathering crust by geological and logging data,establishment of weathering crust index model based on response characteristics of logging curves,and established a logging evaluation method for the volcanic weathering crust reservoir structure.It provides a reference for finding the dominant reservoir of weathered crust and oil testing perforation in the later stage,which has good application effect.It has important guiding significance for the later exploration and development of weathered volcanic hydrocarbon reservoirs.