Abstract

Brittleness index (BI) is an important parameter in evaluation of rock frackability. Two different methods are used to estimate continuous BI of Cambay Shale of Jambusar-Broach block, Cambay Basin, India, using advanced logs like ECS, Sonic Scanner (SS) and mineralogical analysis of core samples by XRD. First method is based on mineral composition using ECS log and second method is based on elastic moduli using SS log. ECS-based BI is in good agreement with BI from XRD-based mineralogy. BI estimated by two log-based methods will provide a cost effective and continuous information to identify potential regions for effective hydro-fracture.

摘要

脆性指数（BI）是评价岩石脆性的重要参数。两种不同的方法被用来估算印度坎贝盆地贾姆伯-布鲁克区块坎贝页岩的坎贝页岩的连续BI，使用诸如ECS，声波扫描仪（SS）的先进测井以及通过XRD对岩心样品进行矿物学分析。第一种方法基于使用ECS测井的矿物成分，第二种方法基于使用SS测井的弹性模量。基于ECS的BI与基于XRD的矿物学中的BI很好地吻合。通过两种基于对数的方法估算的BI将提供具有成本效益的连续信息，以识别有效水力压裂的潜在区域。