Heterogeneity characterization from sequence stratigraphic analysis of Paleocene-Early Eocene Cambay Shale formation in Jambusar-Broach area, Cambay Basin, India

Differential Development Mechanisms of Pore Types under the Sequence Stratigraphic Constraints of the Wufeng–Longmaxi Formation Shale from the Upper Yangtze Platform

“…As the mineral composition and OM content within the formation change, the porosity and dominant pore types of shale also undergo modification [15]. This stratigraphic variability may be linked to the process of sedimentation and diagenesis [37], and it is further impacted by fluctuations in relative sea levels during the evolution of sequence stratigraphy [38,39]. A multitude of previous studies have illustrated the role of sequence stratigraphy in shaping the enrichment of OM in shale [40][41][42][43][44][45].…”

Evaluation of Pore Characteristics of Deeper Cambay Shale under Simulated Pre/Postsorption Conditions by CH4 and CO2 Gases

“…Commercial production of natural gas from the shale formations with the permeability in the nano-Darcy scale requires massive hydraulic fracturing. However, recent advancements in hydraulic fracturing techniques have allowed for the induction of fractures in the matrix blocks, resulting in a dual porosity system that facilitates the flow of gas and its recovery. , However, because of varied depositional environments and huge heterogeneity in the presence of organic matter, clay, and other minerals, E&P companies are facing challenges to produce gas commercially from many of the identified shale formation across the globe except those in USA and Canada , Efficient extraction of gas from shale is difficult unless flow of gas through micro/meso pores is understood properly, in addition to its geomechanical characteristics for fracturing , …”

“…However, recent advancements in hydraulic fracturing techniques have allowed for the induction of fractures in the matrix blocks, resulting in a dual porosity system that facilitates the flow of gas and its recovery. 10,11 However, because of varied depositional environments and huge heterogeneity in the presence of organic matter, clay, and other minerals, E&P companies are facing challenges to produce gas commercially from many of the identified shale formation across the globe except those in USA and Canada 11,12 Efficient extraction of gas from shale is difficult unless flow of gas through micro/meso pores is understood properly, in addition to its geomechanical characteristics for fracturing 13,14 Shale is composed of a mixture of fine-grained clay, quartz, and small amounts of feldspar, sulfides, carbonates, and mineral oxides. The presence of quartz, calcite, and dolomite increases shale's brittleness, making it more susceptible to fracturing 15,16 Shale formation rich in clay content, shows plastic nature and is more difficult to fracture.…”

Authigenic Fe Mineralization in Shallow to Marginal Marine Environments: A Case Study from the Late Paleocene—Early Eocene Cambay Shale Formation

“…Although the Paleogene of India has become an important region for its economically viable lignite and hydrocarbon deposits and their rich fossil assemblages, the high abundance of authigenic glauconite within the Paleogene is often overlooked. High-resolution biostratigraphic studies and radiogenic and stable isotope stratigraphy ( 13 C, 87 Sr/ 86 Sr, and 40 Ar/ 39 Ar, respectively) of the Paleogene deposits in India allow the precise correlation of sedimentary sections with global events such as the Paleogene hyperthermal events [20,29,[32][33][34][35][36]. Recent investigations have revealed the association of glauconite with major transgressions [20,23,36].…”