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Contribution to the Characterization of Carbonate Rocks of the Nganzi Oil Exploration Block (Onshore of the DR Congo Coastal Basin)

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Open journal of Yangtze Oil and Gas 2022年第3期7卷 149-165页

作者： Dominique Wetshondo Osomba Patrick lokata Ediho Shams Mbundi Diambu Bruno Deko Oyema Benjamin Safari Kachunga Jean Ondontshia Nkoyi link Bukasa Muamba joël kabesa kilungu Department of Geoscience Faculty of Sciences University of Kinshasa Kinshasa Democratic Republic of the Congo Genie des Ressources Manières et Pétroliéres (GeReMiPe) Research Center University of Kinshasa Kinshasa Democratic Republic of the Congo Department of Exploration and Production Faculty of Oil Gas and Renewable Energies University of Kinshasa Kinshasa Democratic Republic of the Congo Centre de Recherches Géologiques et Miniéres (CRGM) Kinshasa Democratic Republic of the Congo

The carbonate lithofacies of the Nganzi Exploratory Block located in the lukula Territory in the Central Kongo Province were described in the field, sampled and subjected to microscopic, mineralogical, physico-chemical and petrophysical analyses. The aim is to increase the probability of discovery of deposits following the drilling of exploration wells in the most appropriate structures. These carbonates, limestones (white, greyish and greenish) and dolomites (massive and platelets) are presented in packstone, grainstone and wackestone textures. In addition to the essential minerals of these rocks, calcite and dolomite, we find quartz, plagioclase and kaolinite. With a porosity between 11% and 19% and a permeability of 138 to 155 mD, the Nganzi carbonates, which contain up to 23% oil, constitute good oil reservoirs. The characterization of the detrital facies and the acquisition of a seismic survey of the wells is essential to have a more detailed knowledge of the oil resources of the Nganzi Block.

关键词： Nganzi Block limestone Dolomite Petrophysics Texture Surface Shows

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Contribution to the Characterization Study of the Surface Indices of the lotshi Block and Its Surroundings in the Coastal Basin of Congo

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Open journal of Yangtze Oil and Gas 2022年第1期7卷 84-100页

作者： Bruno Deko Oyema Dominique Wetshondo Osomba Bavon Diemu Tshiband Patrick lokata Ediho Jean-Piére Kalay Kut Jean Ondontshia Nkoyi link Bukasa Muamba joël kabesa kilungu Exploration and Production Department Faculty of Oil Gas and Renewable Energies University of Kinshasa Kinshasa Democratic Republic of the Congo Geoscience Department Faculty of Sciences University of Kinshasa Kinshasa Democratic Republic of the Congo Centre de Recherche en Géophysique (CRG) Kinshsa Democratic Republic of the Congo

The lotshi block with an area of 506 Km2, is located in the coastal basin in central Congo. It is between 12°31' and 12°53' east longitude and 05°33' and 05°44' south latitude. As part of this research, we carried out geological observations in the field, and sampled rocky materials in sites of petroleum interest in the lotshi Block and surroundings in order to contribute to the understanding of the petroleum geology of this block, more particularly of its petroleum system. The samples brought back from the field were subjected to microscopic, mineralogical, (DRX), chemical (XRF) analyses and to the extraction of the hydrocarbon binder contained therein at the laboratories of UlG (Belgium), CRGM and OR in Kinshasa. The results obtained are summarized as follows: 1) Mineralogically: quartz, k-feldspar, plagioclase, calcite and dolomite are the dominant minerals in the samples analyzed;2) lithologically: two lithofacies (quartz sandstone and carbonate sandstone);3) On the petroleum level: the sandstone rock of lotshi and its surroundings are impregnated with hydrocarbons. It contains between 12% and 25% of hydrocarbon binder.

关键词： Characterization Indices lotshi Block

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