An overview of organic geochemical indices to evaluate conventional petroleum source rocks: a summary of examples from the Indian Subcontinent

Ratnayake, Amila Sandaruwan

doi:10.1080/10916466.2022.2134893

Petroleum Science and Technology

2022

DOI: 10.1080/10916466.2022.2134893

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An overview of organic geochemical indices to evaluate conventional petroleum source rocks: a summary of examples from the Indian Subcontinent

Amila Sandaruwan Ratnayake

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Cited by 3 publications

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“…The regional tectonic settings have significantly impacted the distribution of sedimentary strata (Ratnayake et al 2014). Source rock quality, maturity, and reservoir rocks play vital roles in evaluating oil and gas potential (Jiang et al 2015, Ratnayake et al 2018, Ratnayake, 2022, and mineralogy is a crucial part of understanding the primary migration of hydrocarbon from the source rocks. For example, the source rock fragility and cementation are affected by minerals such as quartz, feldspar, and carbonate (Zou et al 2010, Liang et al 2014.…”

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confidence: 99%

Qualitative mineralogical analysis of Barracuda exploration well in the offshore Mannar Basin (the Indian Ocean) using FTIR and XRD techniques

Gunathilake,

Jaywardana,

Ratnayake

et al. 2022

Ruhuna J. Sci.

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The Mannar Basin plays a vital role in petroleum exploration in Sri Lanka, and its Barracuda exploration well was drilled up to 4206 m in depth. The objective of the current study is to identify mineralogy using Fourier-transform infrared (FTIR) and X-ray diffraction (XRD) analyses. The FTIR and XRD analyses confirm the presence of quartz, feldspar, clay minerals (e.g., kaolinite, montmorillonite), calcite, and hematite in all marlstone and mudstone samples. These sedimentary rocks can be identified as potential petroleum source rocks in the Mannar Basin. Quartz, carbonate, and hematite cementations are directly reduced porosity and permeability, and thus primary migration of hydrocarbons from potential source rocks. Clay minerals act as a seal for hydrocarbon migrations in the Mannar Basin. A variety of dominant clay mineral assemblages allows the reconstruction of several paleoclimatic chronozones in warm/wet and arid climates. In contrast, feldspar dissolution promotes the primary migration of hydrocarbon from potential petroleum source rocks. Consequently, this study concluded that common minerals such as quartz, carbonate, and hematite are associated with the trapping and binding processes of hydrocarbons.

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confidence: 99%

Qualitative mineralogical analysis of Barracuda exploration well in the offshore Mannar Basin (the Indian Ocean) using FTIR and XRD techniques

Gunathilake,

Jaywardana,

Ratnayake

et al. 2022

Ruhuna J. Sci.

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Gondwana sedimentary rocks of Andigama Basin, Sri Lanka: unraveling weathering dynamics, tectonic setting, and paleoclimate

Gunathilake,

Jayawardana,

Ratnayake

et al. 2024

Int J Earth Sci (Geol Rundsch)

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Sedimentological observations and geochemical characteristics of paleo-tsunami deposits along the east coast of Sri Lanka in the Indian Ocean

Ratnayake

Wijewardhana

Haraguchi

et al. 2023

Quaternary International

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An overview of organic geochemical indices to evaluate conventional petroleum source rocks: a summary of examples from the Indian Subcontinent

Cited by 3 publications

References 38 publications

Qualitative mineralogical analysis of Barracuda exploration well in the offshore Mannar Basin (the Indian Ocean) using FTIR and XRD techniques

Qualitative mineralogical analysis of Barracuda exploration well in the offshore Mannar Basin (the Indian Ocean) using FTIR and XRD techniques

Gondwana sedimentary rocks of Andigama Basin, Sri Lanka: unraveling weathering dynamics, tectonic setting, and paleoclimate

Sedimentological observations and geochemical characteristics of paleo-tsunami deposits along the east coast of Sri Lanka in the Indian Ocean

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