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首页> 外文会议>SPE/AAPG/SEG Unconventional Resources Technology Conference >Applied Petroleum Source Rock Evaluation and High-Resolution Sequence Stratigraphy of La Luna Formation, Venezuela: Integrating for Finding the Unconventional Sweet Spots
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Applied Petroleum Source Rock Evaluation and High-Resolution Sequence Stratigraphy of La Luna Formation, Venezuela: Integrating for Finding the Unconventional Sweet Spots

机译：委内瑞拉的应用石油源岩评价和高分辨率序列地层，委内瑞拉：集成寻找非传统甜点

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Venezuela possesses a world-class, hydrocarbon source rock from one of the most prolific places for oil accumulation in the world. This source rock, the La Luna Formation, (Cretaceous in age) is located in eastern Venezuela’s Maracaibo Basin. Local variations in depositional and diagenetic conditions have manifestly affected the preservation and dilution of organic matter to some degree, generating small-scale variability in the depositional environments, and thus creating a higher-quality source rock within the depositional sequence that can be more prospective than others. To understand the variability of the depositional conditions, variations in organic matter source, thermal maturity, depositional environments and the use of organic/inorganic geochemical parameters were crucial in this study. This combined source rock evaluation composed of geological and geochemical parameters indicated an excellent potential as an unconventional reservoir for oil and gas in the study area. Geochemical analysis (Pristane, phytane (Pr/Ph), distributions of regular steranes, hopanes, monoaromatic steroid hydrocarbons (MAS) and tentative identification of gammacerane) confirmed the excellent quality of the organo-facies with higher productivity and preservation. Thermal maturity parameters indicate that most of the studied cores are within the oil window. Liquid hydrocarbons in the study area occur in the northwest and southwest areas, and condensates and dry/wet gases occur in the northeast. The lithofacies association, the sequencestratigraphic framework, relative hydrocarbon potential (RHP), and biomarker analysis identified the depositional environment as an epicontinental sea developed in a shallow marine, upper shelf euxinic environment represented by a series of third order sequences of Highstand and Transgressive System Tracts overlying the erosional top of the underlying Cogollo Group. These stark differences show the tremendous value that biomarkers provide in the exploration of prospective source rocks. Not only do they help to identify paleoenvironmental changes and redox conditions, but they also depict the best organo-facies and accurate maturity parameters of the rock.
机译：委内瑞拉拥有世界一流的碳氢化合物源岩，来自世界上最多产油的储层之一。这个源岩，La Luna形成，（年龄的白垩纪）位于东委内瑞拉的Maracaibo盆地。沉积和成岩病症的局部变化表明，在一定程度上显现地影响了有机物质的保存和稀释，在沉积环境中产生小规模的变异性，从而在沉积序列内产生更高质量的源岩，这些序列可能比较前景更潜隐其他。为了了解沉积条件的可变性，有机物质源，热成熟度，沉积环境和使用有机/无机地球化学参数的变化在本研究中至关重要。这种由地质和地球化学参数组成的组合源岩体评估表明了研究区域中石油和天然气的非常规储层的优异潜力。地球化学分析（普通植物，植物（PR / pH），常规甾体，料理，单芳族类固醇碳氢化合物（MAS）的分布和伽马射初期鉴定）证实了较高的生产力和保存有机相的优良品质。热成熟度参数表明大多数研究的核心位于油窗口内。研究区域中的液体烃在西北部和西南地区发生，并在东北部发生凝结物和干燥/湿气。锂外曲线协会，序列术术框架，相对烃潜力（RHP）和生物标志物分析将沉积环境确定为浅海洋，由浅海架，上架的高级架子营养环境开发，由高级普通和近级系统的三阶序列表示覆盖潜在的Cogollo集团的侵蚀顶部。这些缺点差异显示了生物标志物在勘探勘探中提供的巨大价值。它们不仅有助于确定古环境变化和氧化还原条件，而且还描​​绘了岩石的最佳有机面和精确成熟度参数。

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