Hydrocarbon Uncertainty Based on Facies Analysis: Middle Jurassic Sequence (Jaisalmer Formation), Jaisalmer Basin, Rajasthan

Abstract

The middle Jurassic transgressive limestone with intermitted fresh water clastic facies of Jaisalmer Formation contains reservoirseal assemblage with fair source rock potential, provide a target for exploration. Till date, very few exploration ventures have been made to explore this formation. The frontier exploration team need to address this sequence with possible accumulation pattern and migration pathways. The objective of current study is to focus on the prospectivity of Jaisalmer Formation that has been established from minor discovery of liquid and gaseous hydrocarbon. In the present study, an attempt has been made to establish the facies model that includes litho-micro-facies, bio-facies, source rock facies and depositional facies. This formation has been tested for hydrocarbon in several wells and in some of the well gas/oil has been flown with water. With exploration background in mind, a detailed examination of Jaisalmer Formation has been attempted in terms of its contribution to the exploration efforts in the basin.

Capture the variation of acoustic impedance property in the Jaisalmer Formation due to structural deformation based on post-stack seismic inversion study: a case study from Jaisalmer sub-basin, India

“…Several studies in this sub-basin have been shown the maturity of the petroleum system in this sub-basin which shows the possibilities for hydrocarbon exploration (Pandey et al 2019;Wandrey et al 2004;Pandey and Maurya 2020;Srivastava et. al.…”

“…Limited explorations have been carried out in the Jaisalmer Formation, and hydrocarbon discoveries did not report. Although lithofacies, biofacies, and depositional facies in this formation have been reported (Pandey and Maurya 2020). However, the presence of suitable conditions for hydrocarbon exploration lot of challenges is involved.…”

“…However, based on conventional well log data from six well data (two from Ghotaru and four from the Bandha region), this study was conducted. Several studies show the maturity of the petroleum system in the study area (DGH 2007), where the Jaisalmer limestone formation has been considered a potential reservoir with source rock (Pandey and Maurya 2020). Limited explorations have been carried out in the Jaisalmer Formation, and hydrocarbon discoveries did not report.…”

Microfacies and diagenetic overprints in the limestones of Middle Jurassic Fort Member (Jaisalmer Formation), Western Rajasthan, India: Implications for the depositional environment, cyclicity, and reservoir quality

“…Maximum source rock data is available from Jaisalmer‐Mari High followed by Shahgarh Low and Miajlar Low, while scanty data is available from Kishangarh Shelf (Pandey, Kumar, Maurya, & Pandey, 2019). The exploration activity is continuing in Jaisalmer‐Mari High (M/s Oil and Natural Gas Corporation), Shahgarh Low (M/s Focus Energy, Ltd.), and Kishangarh Shelf (M/s Oil India, Ltd.; Pandey et al, 2019; Pandey & Maurya, 2020). The carbonate and clastic sequences of Palaeozoic to Quaternary age comparable to the surface exposures with inconsequential variations are found in the wells drilled in the basin.…”

“…The carbonate and clastic sequences of Palaeozoic to Quaternary age comparable to the surface exposures with inconsequential variations are found in the wells drilled in the basin. Several wells drilled in the Jaisalmer Formation registered hydrocarbon shows, but the testing results were poor and unpromising, except for initial gas influx (Pandey & Maurya, 2020). However, the Jurassic Jaisalmer Formation still possesses dual individualities, in offering the possibility of carbonate reservoir in assessment of hydrocarbon potential, as well as source rock characteristics due to its deposition under a fluctuating depositional environment.…”