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Structural control on sweet-spot distribution in a carbonate reservoir: Concepts and 3-D models (Cogollo Group, Lower Cretaceous, Venezuela)

机译:碳酸盐岩储层中甜点分布的结构控制:概念和3-D模型(Cogollo集团,下白垩统,委内瑞拉)

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摘要

Numerous major hydrocarbon accumulations are related to burial diagenesis in carbonate reservoirs; however, three-dimensional (3-D) modeling of such reservoirs is a major challenge. The geometries of diagenetic fronts are poorly understood, and few quantitative data on field and outcrop examples for these diagenetic zones exist. The Early Cretaceous Cogollo carbonates (Urdaneta West field, northwest Venezuela) are an example of deeply buried (>5000 m; >1600 ft), diagenetically altered limestones producing from a few high-porosity streaks and fracture corridors. Reservoir "sweet spots" formed because of the interplay of structural evolution and diagenesis. Structural deformation not only generated a fracture network but also influenced primary facies distribution, circulation of diagenetic fluids, and distribution of early charged paleohighs in the reservoir.
机译:碳酸盐岩储层中大量的主要油气成藏与埋藏 成岩作用有关。但是,此类储层的三维 (3-D)建模是一项重大挑战。对成岩锋面的 几何形状了解甚少,并且对于这些成岩 区域的实地和露头实例的定量数据很少。早白垩世碳酸盐岩(委内瑞拉西北部的Urdaneta West油田)是深埋的 (> 5000 m;> 1600 ft),经渗磁改变的石灰岩 < / sup>从一些高孔隙度的条纹和裂缝通道中产生。 储层“最佳点”是由于结构 演化和成岩作用的相互作用而形成的。结构变形不仅产生了 裂缝网络,而且还影响了原始相分布,成岩流体的 循环以及储层中早期 带电古隆起的分布。 。

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  • 来源
    《AAPG Bulletin》 |2005年第12期|00001651-00001676|共26页
  • 作者单位

    Shell International E&P, 3737 Bellaire Boulevard, Houston, Texas 77025michael.poppelreiter@shell.com;

    Shell International E&P, EP-Solutions, 3737 Bellaire Boulevard, Houston, Texas 77025maria.balzarini@shell.com;

    Shell Venezuela S.A. Torre Empresarial Claret, Av. 3E entre Calles 78 Y 79 Piso 14, Sector Valle Frio Maracaibo, Zulia, Venezuelapaulino.desousa@shell.com;

    Shell Venezuela S.A. Torre Empresarial Claret, Av. 3E entre Calles 78 Y 79 Piso 14, Sector Valle Frio Maracaibo, Zulia, Venezuelastephan.engel@shell.com;

    Shell Venezuela S.A. Torre Empresarial Claret, Av. 3E entre Calles 78 Y 79 Piso 14, Sector Valle Frio Maracaibo, Zulia, Venezuelamiguel.galarraga@shell.com;

    Eriksfjord AS, Chausee de Fleurus 6040 Jumet, Belgiumbirger.hansen@eriksjiord.com;

    Shell Venezuela S.A. Torre Empresarial Claret, Av. 3E entre Calles 78 Y 79 Piso 14, Sector Valle Frio Maracaibo, Zulia, Venezuelaxiomara.marquez@shell.com;

    Shell International E&P, EP-Solutions, 3737 Bellaire Boulevard, Houston, Texas 77025jose.morell@shell.com;

    Broken N Consulting, Inc. P.O. Box Q, 445 Wrangler Road, Simonton, Texas 77476-1017nelson_consulting@hotmail.com;

    Shell Venezuela S.A. Torre Empresarial Claret, Av. 3E entre Calles 78 Y 79 Piso 14, Sector Valle Frio Maracaibo, Zulia, Venezuelafrancisco.rodriguez@shell.com;

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