准噶尔盆地南缘下组合煤系烃源岩生烃模拟及高探1井油气源研究

于淼; 高岗; 靳军; 马万云; 何丹; 向宝力; 樊柯廷; 刘苗

doi:10.11781/sysydz202204687

准噶尔盆地南缘下组合煤系烃源岩生烃模拟及高探1井油气源研究

doi: 10.11781/sysydz202204687

于淼^{1, 2,},
高岗^{1, 2, ,},
靳军^{3, 4, 5},
马万云^{3, 4, 5},
何丹^{3, 4, 5},
向宝力^{3, 4, 5},
樊柯廷^{1, 2},
刘苗^{1, 2}

1.
中国石油大学地球科学学院, 北京 102249
2.
油气资源与探测国家重点实验室, 北京 102249
3.
新疆砾岩油藏实验室, 新疆克拉玛依 834000
4.
砾岩油气藏勘探开发重点实验室, 新疆克拉玛依 834000
5.
中国石油新疆油田分公司实验检测研究院, 新疆克拉玛依 834000

基金项目:

中石油新疆油田分公司对外协作项目 2020-C4006

详细信息

作者简介:
于淼(1997—), 男, 博士研究生, 从事油气勘探与开发研究。E-mail: 461973844@qq.com

通讯作者:
高岗(1966—), 男, 博士, 教授, 从事油气勘探与开发科研和教学工作。E-mail: gaogang2819@sina.com

中图分类号: TE122.11
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-29
- 修回日期: 2022-06-14
- 刊出日期: 2022-07-28

Hydrocarbon generation simulation of coaly source rocks in the Lower combination on the southern margin of Junggar Basin and indications for oil and gas sources of well Gaotan 1

YU Miao^{1, 2
,},
GAO Gang^{1, 2
, ,},
JIN Jun^{3, 4, 5},
MA Wanyun^{3, 4, 5},
HE Dan^{3, 4, 5},
XIANG Baoli^{3, 4, 5},
FAN Keting^{1, 2},
LIU Miao^{1, 2}

1.
College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China
2.
State Key Laboratory of Petroleum Resources and Prospecting, Beijing 102249, China
3.
Xinjiang Conglomerate Reservoir Laboratory, Karamay, Xinjiang 834000, China
4.
Key Laboratory of Exploration and Development of Conglomerate Reservoirs, Karamay, Xinjiang 834000, China
5.
Research Institute of Experimental Testing, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

摘要

摘要: 随着准噶尔盆地勘探的不断深入，准南下组合日益成为油气勘探的重点，但目前针对下组合烃源岩生烃演化特征尚未进行系统性研究，不同岩性煤系烃源岩生烃能力和生油气量如何等尚未进行系统性实验分析。最近获得高产的高泉背斜高探1井油气与哪种岩性煤系源岩关系最为密切等都值得进一步讨论。通过对侏罗系煤岩、碳质泥岩和泥岩进行密闭容器高压釜加水热模拟实验，对3种岩性煤系烃源岩生烃特征及油气源对比进行了研究。碳质泥岩和泥岩具有较高的生油潜力，碳质泥岩是侏罗系煤成油的主要贡献者，且角质体可能是碳质泥岩主要生油母质。煤岩在更高演化阶段较碳质泥岩和泥岩具有更高的生气潜力，且主要为干酪根降解气。模拟气体随演化程度升高均不同程度出现碳同位素分馏效应，即随成熟度增加气体稳定碳同位素先变轻后变重，且δ¹³C₁分馏效应较δ¹³C₂明显。结合模拟实验进一步对高探1井油气源进行了分析，认为高探1井下白垩统清水河组原油主要为侏罗系碳质泥岩生成的较高成熟度原油，而3种岩性煤系烃源岩对天然气均有贡献。
- 热模拟实验 /
- 油气源对比 /
- 显微组分 /
- 煤系烃源岩 /
- 气体碳同位素 /
- 侏罗系 /
- 准噶尔盆地
Abstract: With the deepened exploration progress in the Junggar Basin, the lower assemblage has increasingly become the focus for oil and gas exploration. However, systematic research has not been achieved on the hydrocarbon generation characteristics of the lower assemblage source rocks, and systematic experimental analysis has not been carried out on the hydrocarbon generation potential and oil and gas generation capacity of coaly source rocks with different lithology. Oil and gas have highly yielded in the well of Gaotan 1 in the Gaoquan anticline, and which lithology of coaly source rocks have the closest relationship with it is worth for a further discussion. Sealed vessel autoclave hydrous simulation of Jurassic coaly rock, carbonaceous mudstone and mudstone was carried out in this study, results show that carbonaceous mudstone and mudstone have high oil generation potential. Carbonaceous mudstone is the main contributor of Jurassic coal formed oil, and cutinite may be the main oil source in carbonaceous mudstone. Coaly rock has higher gas generation potential than carbonaceous mudstone and mudstone in higher evolution stage, mainly generating kerogen cracking gas. The carbon isotopic fractionation of simulated gas appears in vary degrees with the increase of evolution, that is, with the increase of maturity, the stable carbon isotope of gas first becomes lighter and then becomes heavier, and the δ¹³C₁ fractionation is more obvious than that of δ¹³C₂. Combined with simulation experiments, the oil and gas source of well Gaotan 1 was further analyzed. It was then concluded that the crude oil of Cretaceous Qingshuihe Formation in well Gaotan 1 is mainly high-mature crude oil generated by Jurassic carbonaceous mudstone, and the three lithologic coaly source rocks contributed to natural gas.
- thermal simulation experiment /
- oil and gas source comparison /
- macerals /
- coal measure source rock /
- gas carbon isotope /
- Jurassic /
- Junggar Basin

HTML全文

图 1 准噶尔盆地南缘侏罗系八道湾组煤系烃源岩模拟排出油、气态烃及各组分产率相关图

Figure 1. Simulated oil and gas emission and correlation diagram of each component yield of coal measure source rocks from Lower Jurassic Badaowan Formation, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 2 准噶尔盆地南缘侏罗系八道湾组煤系烃源岩模拟δ¹³C₁和δ¹³C₂演变特征

Figure 2. δ¹³C₁ and δ¹³C₂ evolution of coal measure source rocks from Lower Jurassic Badaowan Formation, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 3 准噶尔盆地南缘侏罗系八道湾组煤系烃源岩热模拟液态烃(P_oil)、气态烃产率(P_gas)与R_o关系

Figure 3. Correlation between simulated oil and gas yields and R_o of coal measure source rocks in Lower Jurassic Badaowan Formation, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 4 准噶尔盆地南缘高探1井下白垩统清水河组原油与可能烃源岩对比

Figure 4. Correlation between possible source rocks and crude oil in Lower Cretaceous Qingshuihe Formation, well Gaotan 1, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 5 准噶尔盆地南缘高探1井下白垩统清水河组原油生标物质谱图

Figure 5. Biomarker spectrum of crude oil in Lower Cretaceous Qingshuihe Formation, well Gaotan 1, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 6 准噶尔盆地南缘高探1井下白垩统清水河组原油与碳质泥岩模拟排出油生标物对比

Figure 6. Comparison of biomarkers between simulated discharged oil from carbonaceous mudstone and crude oil in Lower Cretaceous Qingshuihe Formation, well Gaotan 1, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 7 准噶尔盆地南缘侏罗系八道湾组碳质泥岩热模拟排出油色谱—质谱图

Figure 7. Chromatography and mass spectrometry of carbonaceous mudstone in Jurassic Badaowan Formation, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 8 准噶尔盆地南缘侏罗系八道湾组碳质泥岩热模拟有机显微组分演化

Figure 8. Thermal simulation of organic maceral evolution of carbonaceous mudstone in Jurassic Badaowan Formation, southern margin of Junggar Basin

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图 9 准噶尔盆地南缘油气田分布及侏罗系煤系源岩成熟度^[34]

Figure 9. Distribution of oil and gas fields and maturity of Jurassic coal measure source rocks on the southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 10 准噶尔盆地南缘高探1井天然气成因类型判识

图 10b的图版据文献[36, 42-44]。

Figure 10. Identification of genetic type of natural gas in well Gaotan 1, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 11 准噶尔盆地南缘高探1井甲烷碳同位素(a)、乙烷碳同位素(b)与模拟气碳同位素对比

Figure 11. Comparison of carbon isotope between methane (a), ethane (b) and simulated gas in well Gaotan 1, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

图 12 准噶尔盆地南缘高探1井地震地质解释剖面

Figure 12. Seismic geological interpretation section of well Gaotan 1, southern margin of Junggar Basin

下载: 全尺寸图片幻灯片

表 1 准噶尔盆地南缘NA井侏罗系八道湾组烃源岩模拟样品地球化学特征

Table 1. Geochemical characteristics of source rock samples from Lower Jurassic Badaowan Formation, well NA, southern margin of Junggar Basin

样品编号	样品岩性	取样深度/m	ω(TOC)/%	T_max/℃	S₁/(mg·g^-1)	S₂/(mg·g^-1)	R_o/%	干酪根类型	有机显微组分	沉积环境
NA-1	煤岩	485.44	67.44	426	0.63	134.60	0.54%	Ⅱ₂	基质镜质体为主，少量孢子体	湖沼相
NA-2	碳质泥岩	484.32	31.88	425	1.39	54.17	0.52%	Ⅱ₂	角质体为主	湖沼相
NA-3	泥岩	483.07	3.14	437	2.59	6.86	0.53%	Ⅱ₂	孢子体为主，少量角质体	湖沼相

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表 2 准噶尔盆地南缘高泉油气田高探1井下白垩统清水河组天然气组分与碳同位素统计

Table 2. Statistics of natural gas components and carbon isotopes of Lower Cretaceous Qingshuihe Formation in well Gaotan 1, Gaoquan Oil and Gas Field, southern margin of Junggar Basin

采样深度/m	C₁/%	C₂/%	C₃/%	δ¹³C₁/‰	δ¹³C₂/‰	δ¹³C₃/‰
5 768~5 775	76.50	13.32	5.94	-40.49	-29.14	-26.9
5 768~5 775	74.44	13.39	6.82	-40.35	-28.74	-26.54
5 768~5 775	58.93	10.78	5.34	-40.68	-28.92	-26.42
5 768~5 775	76.62	12.32	5.68	-40.72	-29.01	-26.53
5 768~5 775	78.34	12.60	5.45	-40.46	-28.91	-26.22

下载: 导出CSV

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