辽河西部凹陷古近系烃源岩生烃动力学特征

刘立峰; 姜振学; 钟宁宁; 郑菲菲

辽河西部凹陷古近系烃源岩生烃动力学特征

刘立峰^{1, 2,},
姜振学^{1, 3},
钟宁宁¹,
郑菲菲^{1, 3}

1.
中国石油大学油气资源与探测国家重点实验室, 北京 102249
2.
中国石油大学地质地球物理综合研究中心, 北京 102249
3.
中国石油大学盆地与油藏研究中心, 北京 102249

基金项目:

国家自然科学基金项目 40472078

国家重点基础研究发展计划973项目 2006CB202300

详细信息

作者简介:
刘立峰(1979-), 男, 博士研究生, 研究方向为油气成藏机理与分布规律.E-mail: feng-upc@163.com

中图分类号: P618
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出版历程
- 收稿日期: 2009-01-20
- 刊出日期: 2009-09-25

Hydrocarbon-Generating Dynamic Characteristics of Paleogene Source Rocks in Western Depression, Liaohe Basin

1.
State Key Laboratory of Petroleum Resources and Prespecting, China University of Petroleum, Beijing 102249, China
2.
Geology and Geophysics Comprehensive Research Center, China University of Petroleum, Beijing 102249, China
3.
Basin & Reservoir Research Center, China University of Petroleum, Beijing 102249, China

摘要

摘要: 针对辽河西部凹陷不同岩性、不同干酪根类型18块样品进行了较详细的开放体系生烃动力学研究, 模拟结果反映出相同岩性不同有机质类型烃源岩动力学特征存在较大的差异, 有机质类型越好, 平均活化能越小, 主频活化能对应的反应分数越大, 活化能分布范围越窄, 表明有机质类型对烃源岩生烃动力起着决定性作用.应用平行一级反应模型, 结合埋藏史、热史对辽河西部凹陷古近系烃源岩生烃史进行了定量研究, 层位上, 西部凹陷沙三、沙四段是主力烃源岩, 分别占总生烃量的63.9%和18.5%, 其次为沙一二段和东营组, 4套烃源岩累计生烃量为328.09×10⁸t;东营期是主要的生烃时期.
- 西部凹陷 /
- 辽河盆地 /
- 生烃化学动力学 /
- 烃源岩
Abstract: The experiments of hydrocarbon-generating dynamics in opening system on 18 samples of different lithology and kerogen types in western depression of Liaohe basin were carried out, and the results show that there exists huge difference between different kerogen types of the same lithology: the better the kerogen types, the lower of the average activity energy; while the larger of the corresponding reaction fraction of dominated frequency activity energy, the narrower distribution range of the activity energy, which shows that the kerogen type has a deciding function on hydrocarbon-generating of the source rock.By using the parallel first-order reaction model, taking the burial history and thermal history into comprehensive consideration, we did a quantitive study on the hydrocarbon-generating history of the source rock of the western depression, Liaohe basin.The results show that the Sha 3 and Sha 4 formations are the main source layers, which account for 63.9% and 18.5% the total amount of hydrocarbon-generating respectively.Sha 1-2 and Dongying formations are the secondary source rock layers, and the accumulative hydrocarbon generation amounts to 328.09×10⁸ t of the four source rock layers in total.The Dongying deposition period is the main hydrocarbon-generating time.
- western depression /
- Liaohe basin /
- hydrocarbon-generating chemical kinetics /
- hydncarbon source rock

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图 1 研究样品生烃转化率与温度关系曲线(5 ℃/min升温速率)

Fig. 1. Curves of sample conversion rate of hydrocarbon generation and temperature

下载: 全尺寸图片幻灯片

图 2 辽河西部凹陷各样品活化能分布

Fig. 2. Activation energy distribution of the samples in western depression of Liaohe basin

下载: 全尺寸图片幻灯片

图 3 辽河西部凹陷I型干酪根样品生烃动力学特征

Fig. 3. Hydrocarbon-generating dynamic characteristics of the kerogen samples in western depression of Liaohe basin

下载: 全尺寸图片幻灯片

图 4 西部凹陷泥岩样品平均活化能分布(a)和主频反应分数分布(b)

Fig. 4. Average activation energy distribution (a) and the frequency distribution of response of scores (b) of the mudstones samples in western depression

下载: 全尺寸图片幻灯片

图 5 辽河西部凹陷古近系各套烃源岩生烃史

Fig. 5. Hydrocarbon generation history in of paleogene western depression of Liaohe basin

下载: 全尺寸图片幻灯片

表 1 实验样品的基本地质地球化学特征参数

Table 1. Experimental sample parameters of the basic geological and geochemical characteristics

表 2 辽河西部凹陷泥岩样品生烃动力学特征统计

Table 2. Hydrocarbon-generating dynamic characteristics statistics of the mudstone samples in western depression of Liaohe basin

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