东海西部台北坳陷中生界油气成藏模式研究

刘建; 谢睿; 徐敏; 林小云

doi:10.16562/j.cnki.0256-1492.2019070307

东海西部台北坳陷中生界油气成藏模式研究

1.
长江大学非常规油气湖北省协同创新中心，武汉 430100

2.
长江大学油气资源与勘探技术教育部重点实验室，武汉 430100

3.
长江大学地球科学学院，武汉 430100

4.
中国地质大学（北京）能源学院，北京 100089

基金项目: 国家科技重大专项“近海中、古生界残留盆地特征及油气潜力”（2011ZX05023-003）

详细信息

作者简介: 刘建（1965—），男，博士，高级工程师，主要从事石油地质方面的教学与研究工作，E-mail：wh41832@hotmail.com

通讯作者: 林小云（1965—），女，博士，教授，主要从事油气成藏地质与资源评价的科研和教学工作，E-mail：linxy65@126.com

中图分类号: P736.1

收稿日期: 2019-07-03

修回日期: 2019-09-20

刊出日期: 2019-12-25

Hydrocarbon accumulation model of the Mesozoic in Taibei Depression, western East China Sea

1.
Hubei Collaborative Innovation Center for Unconventional Oil/Gas, Yangtze University, Wuhan 430100, China

2.
Key Laboratory of Oil and Gas Resources and Exploration Technologies, Yangtze University, Ministry of Education, Wuhan 430100, China

3.
College of Geosciences, Yangtze University, Wuhan 430100, China

4.
School of Energy Resources, China University of Geosciences, Beijing 100089,China

More Information

Corresponding author: LIN Xiaoyun, linxy65@126.com

Received Date: 03 July 2019

Revised Date: 20 September 2019

Publish Date: 25 December 2019

摘要

摘要:
东海陆架盆地是在元古界、古生界复杂基底上发展形成的中—新生代叠合含油气盆地，蕴藏丰富的油气资源，对中国的能源战略意义重大，东海陆架盆地中生界将是未来中国东部油气勘探新区及重要领域。台北坳陷位于东海陆架盆地西部坳陷带南部，中生界陆相河湖沉积体系发育福州组泥岩、石门潭组泥岩两套主力烃源岩。根据台北坳陷烃源岩、储盖组合、输导体系等油气藏形成的静态要素为基础，结合油气来源和成藏期次分析，研究其成藏过程，明确了台北坳陷以福州组、石门潭组为主力烃源，福州组、石门潭组及始新世瓯江组砂体为主要储层，油气沿着凹陷边缘的砂体、活动的断层运移，砂体尖灭和断层封闭时期，油气早期成藏；始新世末－渐新世的全盆性挤压反转，油气重新调整聚集成藏。从而建立起台北坳陷中生界早期成藏，后期调整的成藏模式。
- 台北坳陷 /
- 福州组 /
- 石门潭组 /
- 油气来源 /
- 成藏期次 /
- 成藏模式
Abstract:
The East China Sea Shelf Basin is a Mesozoic-Cenozoic superimposed petroliferous basin formed upon a complicated Proterozoic-Paleozoic basement. It is rich in oil and gas resources and, therefore, of great significance to China's future energy strategy. The Mesozoic of the basin is expected to be a new oil and gas exploration target and even an important field in future in east China. The Taibei Depression is located in the southwestern Depression of the East China Sea Shelf Basin. In the Mesozoic continental fluvial and lacustrine depositional systems, there are two sets of source rocks: Fuzhou Formation mudstone and Shimentan Formation mudstone. Based on the static factors for hydrocarbon accumulation, such as source rocks, reservoir-cap assemblages and transportation systems in the Taipei Depression, through the analysis of the timing of source rock deposition and hydrocarbon accumulation, we studied the forming process of oil accumulations in the Taibei Depression. It is rather clear that the Fuzhou Formation and the Shimentan Formation are the main hydrocarbon sources. The sand bodies of the Fuzhou Formation, Shimentan Formation and Eocene Oujiang Formation are the main reservoirs. Oil and gas migrate along sand bodies and active faults around the margin of the depression. Early hydrocarbon accumulated in the pinch out of sandbodies and/or sealed by faults. Oil and gas readjustment and reaccumulation occurred in the whole basin while compression inversion happened by the end of Eocene to Oligocene. Finally, a reservoir-forming model for early and later adjustment of Mesozoic in the Taipei Depression is established.
- Taibei Depression /
- Fuzhou Formation /
- Shimentan Formation /
- source of hydrocarbon /
- hydrocarbon generation time /
- hydrocarbon generation pattern

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图 1 东海陆架盆地综合地层柱状图

Figure 1.

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图 2 烃源岩饱和烃五环萜烷系列（m/z191）特征分布图

Figure 2.

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图 3 烃源岩饱和烃甾烷系列（m/z217）特征分布图

Figure 3.

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图 4 流体包裹体均一温度分布直方图

Figure 4.

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图 5 WZ-B井盐水包裹体均一温度－埋藏史投影法确定油气充注时间

Figure 5.

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图 6 台北坳陷油气成藏事件图

Figure 6.

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图 7 东海陆架盆地西部油气成藏模式图

Figure 7.

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表 1 中生界烃源岩有机质特征统计表

Table 1. Statistical table of organic matter characteristics of Mesozoic source rocks

组	岩性	有机碳/%	氯仿沥青“A”/%	总烃/×10⁻⁶	（S₁+S₂）/（mg/g）	有机质类型	Ro/%	评价
石门潭组（K₂s）	泥岩	0.30～2.35/ 0.90（33）	0.001～0.029/ 0.016（5）		0.08～3.16/ 2.10（38）	Ⅱ₂—Ⅲ	0.70～1.46/ 1.24（8）	较差—较好
福州组（J₁₊₂f）	泥岩	0.20～3.71/ 0.88（25）	0.065～0.128/ 0.083（4）	86.49～103.99/ 93.38（4）	0.19～4.59/ 0.95（22）	Ⅱ₂—Ⅲ	0.69～0.94/ 0.80（13）	较好
福州组（J₁₊₂f）	碳质泥岩	6.35～8.93/ 7.45（3）	0.082		12.34～15.85/ 13.71（3）	Ⅱ₂—Ⅲ	0.69～0.94/ 0.80（13）	较差
注：表中数据格式为最小值～最大值/平均值（样品数）

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表 2 烃源岩和原油样品饱和烃色谱参数表

Table 2. Table of saturated hydrocarbon chromatographic parameters for source rocks and crude oil samples

井号	层位	性质	主峰碳	OEP	Pr/nC₁₇	Ph/nC₁₈	Pr/Ph
FZ-A	福州组	泥岩	C₁₈	0.85	0.58	0.80	0.43
FZ-A	福州组	泥岩	C₁₈	0.86	0.52	0.71	0.42
FZ-A	福州组	泥岩	C₁₇	1.06	0.50	0.75	0.70
FZ-A	福州组	泥岩	C₁₇	1.21	0.66	0.67	1.10
FZ-A	福州组	泥岩	C₁₇	1.25	0.69	0.62	1.33
WZ-B	灵峰组	原油	C₁₇	1.04	0.19	0.08	2.42
LF-C	元古界	原油	C₁₇	1.02	0.26	0.09	3.04
LF-C	元古界	原油	C₂₅	1.03	0.21	0.08	2.31

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