赣东北荷塘组页岩储层可压裂性评价

可压裂性可用来表征页岩储层能被有效改造的难易程度,对于页岩气藏的开采具有重要影响。本文从页岩气储层岩石的矿物学、岩石力学两个方面,对赣东北底-下寒武统荷塘组页岩气储层脆性指数进行了评价。结果表明,岩石力学参数求取的页岩储层脆性指数更适用于赣东北荷塘组页岩,并根据页岩弹性模量与泊松比的分布范围,建立了适合赣东北荷塘组页岩的脆性指数预测模型。

Evaluation of Fracture-ability of Shale Reservoir,Hetang Formation in Northeast of Jiangxi

Being important for the exploitation of shale gas reservoirs,fracture-ability can represent the difficulty of shale gas reservoir reconstruction.In this paper,two aspects of mineralogy and rock mechanics of shale gas reservoir were analyzed to evaluate shale reservoir brittleness index of Hetang formation in Northeast of Jiangxi province.The results show that brittleness index of shale reservoir calculated by rock mechanics parameter is more applicable to shale of Hetang formation in Northeast of Jiangxi Province, and a brittleness index prediction model was specially designed for shale of Hetang formation in Northeast of Jiangxi province based on the elasticity modulus and Poisson's ratio scopes.