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Three-Dimensional Structural Modelling and source rock evaluation of the Quseir Formation in the Komombo Basin,Egypt

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Acta Geologica Sinica(English Edition) 2020年第5期94卷 1619-1634页

作者： Moamen ALI Geology Department Faculty of ScienceAssiut UniversityAssiut 71516Egypt Earth Science Department Khalifa UniversityUAE

The Quseir Formation consists mainly of dark gray mudstones with a high organic matter content and excellent hydrocarbon-generating *** main objectives of this study are to highlight the dominant structural elements in the Komombo Basin,Egypt,and evaluate the geochemical characteristics of the Quseir *** maps and a 3 D structural model indicate two normal fault trends NW–SE and ENE–*** NW–SE trend is the dominant one that created the primary half-graben *** depth to the top of the Quseir Formation gradually decreases from the eastern and central parts towards the corners of the *** thickness of the Quseir Formation ranges from about 300 to 1000 *** 3 D facies model shows that the shale has a large probability distribution in the study area,compared with the sandstone and *** source rock potential varies between good in the western part to very good in the eastern part of the *** organic-rich interval is dominated by gas-prone kerogen type III based on TOC and *** pyrolysis data vitrinite reflectance(%Ro)(0.5–0.74%)and Tmax values(406–454 C°)suggest a maturity level that ranges from immature to early maturity stage for hydrocarbon generation.

关键词： 3D structural modelling source rock evaluation Komombo Basin Quseir Formation

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Hydrocarbon generating-potential and maturity-related changes of the Khatatba Formation, Western Desert, Egypt

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Petroleum Research 2019年第2期4卷 148-163页

作者： Mohammed A.Ahmed Mostafa M.A.Hassan Geology Department Faculty of ScienceMansoura University35516MansouraEgypt Egyptian General Petroleum Corporation CairoEgypt

The petroliferous province of the Western Desert comprises several sedimentary basins with different hydrocarbon potentiality and production *** middle Jurassic Khatatba Formation was proved a potential source rock in some basins and active/effective in *** current study aims to give a comprehensive assessment and evaluation of the potential organic-rich intervals of the Khatatba Formation across JG and JD fields,northeast Abu Gharadig Basin(NEAG).The hydrocarbon generating capability and sourcing of the Khatatba Formation studied through organic geochemistry calibrated with well ***,the efficiency of some widely used plots of geochemistry is re-evaluated according to their accuracy and *** cuttings,thirteen cores and two oil samples obtained from three wells(JG-2,JG-3 and JD-4)were *** samples revealed total organic carbon(TOC)values ranging from 1 to 9 wt%,exhibiting a good-excellent potential source rock.A single sample in the JD-4 well attained a TOC value of 21.3 wt%with a generating potential(represented by S2 parameter)exceeding 146 mgHc/g rock required a special *** of the samples(mainly in the JD-4 well)attained a sufficient level of thermal maturity for hydrocarbon generation with a Tmax up to 449*** vitrinite reflectance(%Ro)values(a common maturity-related indicator)acquired from the JD-4 well ranging between 0.76%and 0.92%.These values are tediously increasing with depth indicating a uniform geothermal *** Khatatba organofacies,with wide variety of kerogen types(I,II,II-S and II/III),contain marine organic matter with a slight terrigenous input,exhibiting anoxic-suboxic environmental ***-source correlations define the organic-rich intervals responsible for charging the accumulated hydrocarbon in the NEAG concession.

关键词： NEAG concession Abu Gharadig Basin source rock evaluation Khatatba Formation Well logging

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