北极波弗特—马更些三角洲盆地天然气水合物成藏模式

杨楚鹏; 刘杰; 杨睿; 姚永坚; 李学杰; 苏明

doi:10.16562/j.cnki.0256-1492.2020052602

北极波弗特—马更些三角洲盆地天然气水合物成藏模式

1.
中国地质调查局广州海洋地质调查局，广州 510760

2.
南方海洋科学与工程广东省实验室，广州 511458

3.
中国科学院广州能源研究所，广州 510640

4.
中国地质调查局青岛海洋地质研究所，青岛 266071

5.
中山大学海洋科学学院，珠海 519082

基金项目: 中国地质调查局地质调查项目（DD20190577）；南方海洋与工程广东省实验室（广州）人才引进重大专项（GML2019ZD0106）

详细信息

作者简介: 杨楚鹏（1980―），男，博士，教授级高工，从事海洋基础地质和极地地质研究，E-mail：GMGS_yang@foxmail.com

中图分类号: P744

收稿日期: 2020-05-26

修回日期: 2020-07-03

刊出日期: 2020-12-25

Accumulation model of natural gas hydrate in the Beaufort-Mackenzie Delta Basin, the Arctic

1.
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510760, China

2.
Southern Marine Science and Engineering Guangdong Laboratory , Guangzhou 511458, China

3.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China

4.
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China

5.
School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China

Received Date: 26 May 2020

Revised Date: 03 July 2020

Publish Date: 25 December 2020

摘要

摘要:
北极波弗特—马更些三角洲盆地常规油气和水合物资源十分丰富，是全球开展天然气水合物调查研究最早的地区之一。对该盆地水合物和常规油气的共生共藏关系的研究，不但对能源资源的勘探具有直接价值，而且对海域工程施工中海底稳定性评价以及全球气候变化和碳循环研究具有重要的理论和实际意义。在大量文献资料综合分析的基础上，系统总结了影响水合物成藏的地质和稳定条件，结合极地冰川演化特征，提出水合物与下伏油气藏渗漏共生并受冻土调节的成藏模式。认为波弗特—马更些三角洲盆地天然气水合物气源主要为下伏含油气系统中的热成因烃气；构造要素（断裂、背斜）密度与水合物富集丰度呈正相关，水合物赋存主要与Iperk、Kugmallit和Richards组的三角洲平原相砂体有关；水合物稳定带之上的冻土带对天然气水合物的成藏起着关键性调节作用。
- 天然气水合物 /
- 成藏模式 /
- 波弗特―马更些三角洲盆地
Abstract:
The Beaufort-Mackenzie Delta is an Arctic basin which contains abundant conventional hydrocarbon and natural gas hydrate. It is also one of the earliest regions in the world to carry out producing test of natural gas hydrate. To study the coexistence relationship between the hydrate and conventional hydrocarbon in the basin has not only direct significance to energy resource exploration, but also important theoretical and practical significance to seabed stability assessment, global climate change and carbon cycle research. In this paper, geological factors and stability conditions for hydrate reservoir generation was systematically summarized based on the large number of data available. Furthermore, combined with the analysis of glacier evolution, it was concluded that the accumulation of natural gas hydrate in the basin is controlled by the leakage of the underlying petroleum system and the change in permafrost zone. It is revealed that the gas source of hydrate in the basin is mainly the thermogenic hydrocarbon gas coming from the buried petroleum system. The activities of tectonic elements, such as faults and folders, were positively correlated with the enrichment of hydrate, and the hydrate occurrence was mainly related to the sand bodies of the delta plain in the Iperk, Kugmallit and Richards sequences. The permafrost above the hydrate stabilization zone plays a key role in the accumulation of gas hydrate.
- natural gas hydrate /
- accumulation model /
- the Beaufort-Mackenzie Delta Basin

HTML全文

图 1 波弗特—马更些三角洲盆地地理位置及构造单元分布图^[20]

Figure 1.

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图 2 波弗特—马更些三角洲盆地地层综合柱状图^[21-22]

Figure 2.

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图 3 波弗特海陆架—上陆坡海底块体流搬运痕迹地貌特征及浅地层特征^[24]

Figure 3.

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图 4 波弗特海陆架南部的冻胀丘地震反射特征和形成演化模式^[27]

Figure 4.

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图 5 Mallik 2L-38探井含水合物层的测井异常特征^[32]

Figure 5.

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图 6 过Mallik 5L-38井三维地震反射剖面特征^[34]

Figure 6.

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图 7 冻土带、水合物稳定带、水合物层、水合物/游离气接触带和常规油气在地层剖面上的分布关系^[37]

Figure 7.

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图 8 波弗特－马更些三角洲盆地天然气水合物成藏模式

Figure 8.

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表 1 按照水合物净厚度分类的波弗特―马更些三角洲盆地含气体水合物的井数统计^[19]

Table 1. Gas hydrate Wells in the Beaufort-Mackenzie Delta Basin classified by net hydrate thickness ^[19]

含水合物层净厚度/m		＞0.1	＞1	＞2	＞5
钻井数/口	有水合物显示的井	122	80	40	7
	含水合物显示的产油气井	57	32	21	5
	含水合物显示的油气空井	65	48	19	2
含水合物显示的产油气井占有水合物显示的井百分比/%		47	51	53	71

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北极波弗特—马更些三角洲盆地天然气水合物成藏模式

作者简介: 杨楚鹏（1980―），男，博士，教授级高工，从事海洋基础地质和极地地质研究，E-mail：GMGS_yang@foxmail.com

Accumulation model of natural gas hydrate in the Beaufort-Mackenzie Delta Basin, the Arctic

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