轻烃在中国气田天然气地球化学中的应用

IF 11.3 1区地球科学 Q1 ASTRONOMY & ASTROPHYSICS

Annual Review of Earth and Planetary Sciences Pub Date : 2021-12-06 DOI:10.1146/annurev-earth-070921-054917

Shipeng Huang, Jianzhong Li, Tongshan Wang, Q. Jiang, Hua Jiang, X. Tao, Bin Bai, Ziqi Feng

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引用次数: 11

摘要

轻烃(LHs)是天然气的重要组成部分，其化学和同位素组成对确定气藏的成因类型、热成熟度、气-气对比、气源对比、运移方向和运移相以及蒸发分馏、生物降解和热化学硫酸盐还原等次生蚀变具有重要作用。通过对近几十年来LHs地球化学研究的回顾，分析了中国40多个气田天然气和凝析油LHs的化学和同位素组成，综述了LHs的成因机制以及各种因素对其地球化学组成的影响。本文的主要目的是展示LH化学和同位素组成特征在天然气地球化学研究中的应用，并评估地球化学识别图和参数在确定天然气成因类型、成熟度、来源、二次蚀变、运移方向和相位方面的适用性和可靠性。▪轻碳氢化合物的形成有三种主要的成因机制:热分解、有机物的催化分解和微生物作用。具有不同碳数和/或结构的轻烃的化学和同位素组成可以用来识别天然气的成因类型和成熟度。特征轻烃的含量比和碳同位素是气-气和气源相关性的良好指标。▪次生蚀变(蒸发分馏、生物降解、热化学硫酸盐还原)和天然气运移可以通过轻烃的化学和同位素组成来指示。《地球与行星科学年度评论》第50卷的最终在线出版日期预计为2022年5月。修订后的估计数请参阅http://www.annualreviews.org/page/journal/pubdates。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Application of Light Hydrocarbons in Natural Gas Geochemistry of Gas Fields in China

Light hydrocarbons (LHs) are an important component of natural gas whose chemical and isotopic compositions play a vital role in identifying gas genetic type, thermal maturity, gas–gas correlation, gas–source correlation, migration direction and phase, and secondary alterations (such as evaporative fractionation, biodegradation, and thermochemical sulfate reduction) experienced by the gas pool. Through review of geochemical research into LHs over recent decades, and analysis of chemical and isotopic compositions of LHs of gases and condensates from more than 40 gas fields in China, we present an overview of the genetic mechanisms of LHs and the impacts of various factors on their geochemical compositions. The primary objectives of this review are to demonstrate the application of LH chemical and isotopic composition characteristics to gas geochemistry research and to assess the applicability and reliability of geochemical identification diagrams and parameters for determining gas genetic types, maturity, source, secondary alteration, and migration direction and phase. ▪ Three main genetic mechanisms are proposed for the formation of light hydrocarbons: thermal decomposition, catalytic decomposition of organic matter, and microbial action. ▪ Chemical and isotopic compositions of light hydrocarbons with different carbon numbers and/or structures can be used to identify the genetic types and maturity of natural gas. ▪ Content ratios and carbon isotopes of characteristic light hydrocarbons are good indicators for gas–gas and gas–source correlations. ▪ Secondary alterations (evaporative fractionation, biodegradation, thermochemical sulfate reduction) and migration of gas can be indicated by chemical and isotopic compositions of light hydrocarbons. Expected final online publication date for the Annual Review of Earth and Planetary Sciences, Volume 50 is May 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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来源期刊

Annual Review of Earth and Planetary Sciences 地学天文-地球科学综合

CiteScore

25.10

自引率

0.00%

发文量

期刊介绍： Since its establishment in 1973, the Annual Review of Earth and Planetary Sciences has been dedicated to providing comprehensive coverage of advancements in the field. This esteemed publication examines various aspects of earth and planetary sciences, encompassing climate, environment, geological hazards, planet formation, and the evolution of life. To ensure wider accessibility, the latest volume of the journal has transitioned from a gated model to open access through the Subscribe to Open program by Annual Reviews. Consequently, all articles published in this volume are now available under the Creative Commons Attribution (CC BY) license.