论煤系地层烃产物初次运移的相态界线

doi:10.3863/j.issn.1000-2634.1991.02.01

西南石油大学学报(自然科学版) ›› 1991, Vol. 13 ›› Issue (2): 1-11.DOI: 10.3863/j.issn.1000-2634.1991.02.01

• 论文 • 下一篇

论煤系地层烃产物初次运移的相态界线

陈义才李绍基

(勘探系)

收稿日期:1990-10-14 修回日期:1900-01-01 出版日期:1991-04-20 发布日期:1991-04-20

ON PHASE DEMARCATION LINE OF HYDROCARBON-GENERATING PRODUCTS OF COAL SERIES SOURCE ROCK DURING THE FIRST MIGRATION

Chen Yi-cai Li Shao-ji

(Department of Geological Exploration)

Received:1990-10-14 Revised:1900-01-01 Online:1991-04-20 Published:1991-04-20

摘要/Abstract

摘要： 确定源岩油相、气相、水溶相各种相态的初次运移界线是定量计算油气资源及油气评价的核心问题之一。本文以川西北T3X煤系地层为对象，首先通过对热模拟资料的重新整理，得到一个“理论揭煤”的各热模拟阶段中产物的全组分数据，并用PR状态方程计算出相图;第二，考虑到孔隙水的溶解作用，在静态上分别对煤层、泥岩成烃产物的相态进行了计算。计算表明，腐植型母质，其生成时的初始产物全为气相、煤系泥岩中，由于孔隙水大量存在，R。小于1.14%以前烃体系是油相，之后才会出现气相;煤层始终难有油相存在;第三，在含煤层5%的剖面中，R。小于0.95%以前只出现油相，大于此值之后具有气相。此外，通过I型母质热模拟资料，据油气比大小，对某生烃初始产物相态界线进行了初步划分。

关键词: 资源评价, 初次运移, 热模拟相态, 煤系地层

Abstract:

It is one of the main questions in the calculation and evaluation of oil and gas resources to determine the phase demarcation line of oil，gas, water-soluble etc. phases during the first migration in source rock. In this paper，the authors have first cited the coal series formation in Upper Triassic in Northwest Sichuan basin as an example, obtained a total component data of the products of "theoretical lignite" in several stages of hydrocarbon-generating heat simulation of lignite，and calculated their phase maps by PR state equation. After that，considering the solution of porous water，the authors have calculated the phases of hydrocarbon-generating products in coal and mudstone formations respectively. The calculation shows that the originally generated products in the case of III type organic matter are gas phase. Because of a large amount of porous water in coal series mudstone，the generated products are oil phase when Ro values are less than 1.14%，and the products are gas phase when Ro greater than 1.14%.But in coal formation，the oil products are difficult to occur. In 5%of the sections of coal-bearing formation，when Ro values are less than 0.95%，only oil phase occurs, and gas phase comes up only when Ro greater than 0.95 0/. In addition, the authors have roughly divided the phase demarcation line of originally generated products according to oil-gas ratio from heat simulation data of I type organic matter.

Key words: Resources evaluation, First migration, Heat simulation, phase

中图分类号:

TE112.12

陈义才李绍基. 论煤系地层烃产物初次运移的相态界线[J]. 西南石油大学学报(自然科学版), 1991, 13(2): 1-11.

Chen Yi-cai Li Shao-ji. ON PHASE DEMARCATION LINE OF HYDROCARBON-GENERATING PRODUCTS OF COAL SERIES SOURCE ROCK DURING THE FIRST MIGRATION[J]. 西南石油大学学报(自然科学版), 1991, 13(2): 1-11.

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论煤系地层烃产物初次运移的相态界线

ON PHASE DEMARCATION LINE OF HYDROCARBON-GENERATING PRODUCTS OF COAL SERIES SOURCE ROCK DURING THE FIRST MIGRATION

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