Organic Metamorphism and the Generation of Petroleum
Organic Metamorphism and the Generation of Petroleum
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DOI：
10.1306/83d91f06-16c7-11d7-8645000102c1865d
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发表时间：
1975-06
期刊：
影响因子：
3.5
通讯作者：
A. Hood;C. Gutjahr;R. L. Heacock
中科院分区：
文献类型：
--
作者：
A. Hood;C. Gutjahr;R. L. Heacock
称为“有机变质程度”（LOM）的尺度描述了地下埋藏过程中沉积有机物的热变质作用的进展程度。它代表了一个单一的、连续的数值尺度，适用于石油产生和破坏的整个热范围。它基于煤阶，便于将有机变质作用的其他有用尺度相互关联。石油生成的温度与时间的关系基于 9 至 16-LOM 范围内的沉积岩的 LOM 值，以及合理可靠的最高温度和有效加热时间。该关系几乎相当于每增加 10°C 反应速率就增加一倍，并且当 LOM 从 9 增加到 16 时，表观活化能从约 18 kcal/mole 增加到 33 kcal/mole。石油生成的主要变质阶段和初始油源岩成熟度区域叠加在两口井的 LOM 与深度图上，以说明具体深度的预测，其中 任何给定地点的石油源岩中都会产生石油、凝析油和高温甲烷。
A scale referred to as "Level of Organic Metamorphism" (LOM) describes how far the thermal metamorphism of sedimented organic matter has progressed during subsurface burial. It represents a single, continuous numerical scale which is applicable to the entire thermal range of interest in the generation and destruction of petroleum. It is based on coal rank and is convenient for interrelating other useful scales of organic metamorphism. A relation of temperature to time for petroleum generation is based on LOM values of sedimentary rocks in the 9- to 16-LOM range with reasonably dependable maximum temperatures and effective heating times. The relation is nearly equivalent to a doubling of the reaction rate for each additional 10°C, and the apparent activation energies increase from about 18 to 33 kcal/mole as LOM increases from 9 to 16. The principal metamorphic stages of petroleum generation and a zone of initial oil-source-rock maturity are superimposed on graphs of LOM versus depth for two wells to illustrate the prediction of specific depths where oil, gas condensate, and high-temperature methane would be generated in petroleum source rocks at any given location.