A Neotectonic based geomorphic analysis using remote sensing data to delineate potential areas of hydrocarbon exploration: Cachar area, Assam

Mazumder, Subhobroto; Adhikari, Kalyan; Mitra, D. S.; Mahapatra, Samiran; Pangtey, Krishan Kumar Singh

doi:10.1007/s12594-016-0461-2

Cited by 18 publications

(6 citation statements)

References 7 publications

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“…However, these structures are associated with a predominantly vertical component of deformation 14 that is imprinted on the surface in the geomorphic elements, especially in sensitive elements like drainage, lineaments and topography 14 . The analysis of these elements is based on the principles discussed in the literaure 15,16 and helps to bring out surface manifestations of the subsurface structures. These surface manifestations are then correlated with the available subsurface data to validate them and establish the subsurface continuity of these interpreted structures.…”

Section: Methodology and Resultsmentioning

confidence: 99%

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Delineation of Subtle and Obscure Structures in West Bengal Shelf:A Remote Sensing and GIS-Based Parallel Approach

Mazumder¹,

Adhikari²,

Mitra³

et al. 2018

Current Science

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In the West Bengal part of the Bengal Basin, even after five decades of seismic-based hydrocarbon exploration no commercial finds have been identified. Deep drilling revealed the presence of hydrocarbon within the thick sedimentary sequence ranging from Gondwana to Recent. However, well-defined structures suitable for hydrocarbon pool in shallower sediments are apparently not visible in seismic data. In this article, a parallel approach to seismic exploration has been attempted to delineate shallow and subtle structures in the shelf area based on analysis of surface geomorphic data. The study identifies subtle structures in shallow sediments that entrap the remigrated hydrocarbons as well as envisages a multistoried, stacked model of hydrocarbon accumulations in the area. These areas are considered as promising targets and recommended for high-resolution seismic and close grid micro-gravity exploration survey for further detailing.

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Section: Methodology and Resultsmentioning

confidence: 99%

“…Geomorphic highs are delineated from anomalous localized drainage geometries like radial drainages (Figure 4 a) and peripheral/curved drainages (Figure 4 b) 15,16 . These features are used for initial delineation of geomorphic highs in the study area identified from the drainage map of the area.…”

Section: Morphostructural Analysismentioning

confidence: 99%

Delineation of Subtle and Obscure Structures in West Bengal Shelf:A Remote Sensing and GIS-Based Parallel Approach

Mazumder¹,

Adhikari²,

Mitra³

et al. 2018

Current Science

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“…This lineament is also observed to join the Dauki fault northeastward, whereas southwestward it passes over the Barisal-Chandpur subsurface gravity high which is considered to be the manifestation of the continent-ocean crust boundary [1]. The intensity of folding in the region increases from west to east [39] affecting the sequence of rocks ranging in age from upper Cretaceous through Cenozoic.…”

Section: Geological and Stratigraphic Frameworkmentioning

confidence: 89%

“…The belt comprises of thick pile (10-11 km) of sedimentary deposit manifested into a series of NNE-SSW trending, sub-parallel, doubly plunging and highly faulted anticlines and synclines. Major rivers like Barak together with lower-order drainages define a trellis pattern under the influence of alternating synclines and anticlines [39]. The CTFB is bounded on the north by the E-W trending Dauki fault which is assumed to be a thrust associated with right lateral displacement [5,30,34].…”

Section: Geological and Stratigraphic Frameworkmentioning

confidence: 99%

Lithofacies, architectural elements and tectonic provenance of Mio-Pliocene Dupitila Formation in the Cachar Thrust Fold Belt, Northeast India

Baruah

Pandey

2019

SN Appl. Sci.

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The post-orogenic terrestrial accumulations of Dupitila Formation (Mio-Pliocene) have been studied for the first time in the Cachar Thrust Fold Belt of Northeast India employing facies and architectural element analysis techniques. Six lithocolumns measuring 85 m in thickness were analyzed at the outcrop level with minimum resolutions of 20-30 cm. Seven lithofacies, namely clast-supported horizontally stratified gravel (Gh), matrix-supported planar cross-bedded gravel (Gp), trough cross-bedded sandstone (St), planar cross-bedded sandstone (Sp), horizontally bedded sandstone (Sh), laminated sand-silt-mud (Fl) and massive mud (Fm), were identified. The two lithofacies assemblages, i.e., interbedded gravel-sand and sand-mud associations, characterize the lower and upper divisions of Dupitila Formation, respectively. Identification of five architectural elements, i.e., channel fill complex (CHm), single channel (CHs), gravel bar and bedform (GB), sand bed form (SB) and floodplain fines (FF), was accomplished through lithofacies distribution and arrangement of bounding surfaces. Alternating gravelly and sandy facies succeeded by floodplain fines present an overall thinning and fining upward cycle resembling the gravelly and sandy braided fluvial stream deposits. A semi-humid climatic condition has been envisaged for the formation of lithic to sub-lithic (Q 66 F 9 R 25) Dupitila sandstone. These deposits have suffered early as well as late-stage diagenetic changes. The diversified detritus delivery to the fluviatile Dupitila basin was largely made by a recycled orogen comprising of Shillong massif, eastern Himalaya and the Indo-Burman Range.

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“…The basin is characterized by thick clastic sediments consisting of sandstone and mudstone facies ranging in age from Paleocene to Recent. Several oil and gas fields have been discovered in the basin, which are still under production (Chatterjee et al 2006;Mazumder et al 2016).…”

Section: Study Areamentioning

confidence: 99%

Detection of hydrocarbon microseepage-induced anomalies by spectral enhancements of Landsat 7 ETM+ images in part of Assam–Arakan Fold Belt, India

Garain

Mitra

Das

2019

J Petrol Explor Prod Technol

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Subsurface hydrocarbon traps are not correctly sealed, and hydrocarbons move vertically from the reservoir as invisible traces in the form of microseepages. Long-term hydrocarbon microseepages cause surface or near-surface alterations such as bleaching of red beds, enrichment of ferrous iron minerals and higher concentrations of clay and carbonate minerals in soils/ rocks. Multi-and hyperspectral remote sensing data have successfully been used to detect such alterations in many parts of the world. In India, such studies have not been carried out till now. In this study, Landsat 7 ETM+ images have been used to find out hydrocarbon microseepage-bearing areas in part of Assam-Arakan Fold Belt in the northeastern part of India. Based on the spectral characteristics of the hydrocarbon microseepage-induced altered minerals, two spectral enhancement techniques, viz. principal component analysis (PCA) and band ratio analysis, have been carried out on the Landsat 7 ETM+ images. PCA reveals that three principal component images-1457PC3, 1345PC2 and 3457PC4-show relatively better enhancement for the hydrocarbon-bearing alteration areas. Again, band ratio analysis of the images indicates that ratio images-3/1, (2 + 5)/(3 + 4) and 7/5-show excellent spectral enhancement for the hydrocarbon-induced mineral alterations. The three PC images have been combined with the three band ratio images to find out probable hydrocarbon microseepage areas. The remote sensing-derived prospect areas have been validated with surface geochemical, seismic/geologic and gravity data available in the area.

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A Neotectonic based geomorphic analysis using remote sensing data to delineate potential areas of hydrocarbon exploration: Cachar area, Assam

Cited by 18 publications

References 7 publications

Delineation of Subtle and Obscure Structures in West Bengal Shelf:A Remote Sensing and GIS-Based Parallel Approach

Delineation of Subtle and Obscure Structures in West Bengal Shelf:A Remote Sensing and GIS-Based Parallel Approach

Lithofacies, architectural elements and tectonic provenance of Mio-Pliocene Dupitila Formation in the Cachar Thrust Fold Belt, Northeast India

Detection of hydrocarbon microseepage-induced anomalies by spectral enhancements of Landsat 7 ETM+ images in part of Assam–Arakan Fold Belt, India

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