常规测井资料识别砂砾岩储集层裂缝技术

裂缝是控制特殊岩性油藏开发效果的关键性因素之一,如何利用常规资料进行裂缝的识别和评价一直是困扰地球物理学家的重要问题。以准噶尔盆地西北缘八区下乌尔禾组油藏为例,通过岩心和成像测井资料标定表明,砂砾岩储层中深、浅侧向和微侧向测井曲线对裂缝的响应最敏感,其次是声波时差、密度和中子测井资料。据此建立了砂砾岩储层中裂缝的常规测井资料识别模式,并对开发区800多口井资料进行了解释。油藏开发动态资料表明,常规测井资料识别模式解释结果与生产实际符合较好。

Fracture Identification in Glutenite Reservoir Using Conventional Logs

Fracture is one of the most important factors for the performance of special lithological reservoirs. The identification and evaluation of fractures using conventional logs is an important research subject for geophysicists. The reservoir of lower Wuerhe formation, in the 8th district of the northwestern margin of Junggar Basin, features low porosity and permeability, where fracture is developed in multi-stages. According to the core data and the imaging logging data, deep-shallow laterolog and micro-laterolog curves are most sensitive to fracture, as compared with the acoustic, density and neutron logs. In this paper, a model to identify fracture in glutenite reservoir is proposed, and more than 800 wells are interpreted with that model. The production performance indicates that the interpretation results agree well with those obtained in injection adjusting.