Summary Introduction

This document is an expanded abstract.

The Cambay Basin is an intracratonic basin of Late Cretaceous age located along the western continental passive margin of Indian platform of Western Indian State of Gujarat (Fig.1). It has been prognosticated as the main shale gas reservoirs with resource potential of around 231 BCF/mi (Kumar, 2013). Based on the various pilot investigations on Cambay Shale sections, it has been observed that this Shale is a potential hydrocarbon source rock, thermally matured and falls within oil window with TOC values in between 4% to 5 % (average, Upper Cambay Block) and Hydrogen Index values from 150 to 100 mg Hc/gm TOC (Mathuria l, 2011). The thermal maturity in South Cambay (i.e. 0.5 % to 1.8 %) is higher than the north Cambay (i.e. 0.6 % to 0.8 %) as discussed by Padhy et al, 2016. The thermal maturity distribution in the entire Cambay Basin has been shown in Fig. 2. Various exploration studies have been performed by Tewari et al. (1995), Madhavi et al. (2009), Banerjee and Rao (1993), Chandra et al. (1994), Banerjee et al. (2002), Garg and Philip (1994), Ariketi (2011), Sharma and Sircar (2016) and Dayal et al (2013) to prove the hydrocarbon potential of Cambay Shale of Cambay Basin. All these studies need to be validated by the integrated quantitative investigations on Cambay Shale Samples2, high organic matter content (3.0%) and good thermal maturity.

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