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<p>This study developed a three-dimensional (3D) geological model of the Chela and Kinkasi reservoirs in the Yema and Matamba-Makanzi (YMM) blocks, onshore southwestern Congo coastal basin (DRC), using Petrel 2015. The modeling integrated ten well logs, 2D seismic lines, formation tops, and deterministic seismic inversion to characterize reservoir geometry, petrophysical properties, and structural controls on hydrocarbon accumulation. The Chela reservoir is thin, laterally discontinuous, and moderately undeformed, with porosity of 12.7–32% and hydrocarbon saturation of 63–76%, while its limited thickness and complex faulting constrain trap effectiveness, as reflected in historical well performance (YMM-1, Lindu-2, Lindu-3). The Kinkasi reservoir exhibits greater lateral continuity, moderate porosity (15–24%), variable hydrocarbon saturation (14–63%), and well-developed structural closures, particularly in the western blocks. Time- and depth-structure maps identified multiple anticlinal and fault-bounded leads with potential for hydrocarbon accumulation, consistent with producing analogs in the adjacent Perenco concession. These results highlight structural configuration as the primary control on hydrocarbon distribution, while reservoir heterogeneity and lithology influence volumetric potential. The integrated 3D model provides a framework to optimize well placement, reduce exploration uncertainty, and guide future hydrocarbon appraisal in the YMM blocks.</p>

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Structural and stratigraphic modeling of the Yema and Matamba-Mankazi blocks, onshore coastal basin, Democratic Republic of Congo (DRC)

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Emmanuella Kabelenga Mpande,
  • Ricky Kalenga Mualaba,
  • Olugbenga Ademola Boboye,
  • Dominique Osomba Wetshondo

摘要

This study developed a three-dimensional (3D) geological model of the Chela and Kinkasi reservoirs in the Yema and Matamba-Makanzi (YMM) blocks, onshore southwestern Congo coastal basin (DRC), using Petrel 2015. The modeling integrated ten well logs, 2D seismic lines, formation tops, and deterministic seismic inversion to characterize reservoir geometry, petrophysical properties, and structural controls on hydrocarbon accumulation. The Chela reservoir is thin, laterally discontinuous, and moderately undeformed, with porosity of 12.7–32% and hydrocarbon saturation of 63–76%, while its limited thickness and complex faulting constrain trap effectiveness, as reflected in historical well performance (YMM-1, Lindu-2, Lindu-3). The Kinkasi reservoir exhibits greater lateral continuity, moderate porosity (15–24%), variable hydrocarbon saturation (14–63%), and well-developed structural closures, particularly in the western blocks. Time- and depth-structure maps identified multiple anticlinal and fault-bounded leads with potential for hydrocarbon accumulation, consistent with producing analogs in the adjacent Perenco concession. These results highlight structural configuration as the primary control on hydrocarbon distribution, while reservoir heterogeneity and lithology influence volumetric potential. The integrated 3D model provides a framework to optimize well placement, reduce exploration uncertainty, and guide future hydrocarbon appraisal in the YMM blocks.