泌阳凹陷双河油田原油地球化学特征及精细油—源对比研究

doi:10.11720/wtyht.2019.1470

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以双河油田典型原油样品为基础,采用气相色谱—质谱分析技术(GC-MS),通过多种生物标志物参数对比和色谱图特征分析,对核二段、核三段共计28个原油样品做详细的地球化学特征描述和精细油—源对比。分析结果表明,双河油田核三上亚段原油饱和烃色谱图为前峰型和双峰型,重排甾烷和三环萜烷的相对含量较低;而核三下亚段原油饱和烃色谱图主要为前峰型,重排甾烷和三环萜烷的相对含量较高;核三段原油C₁₉、C₂₀、C₂₁三环萜烷呈上升型分布,伽马蜡烷含量较高,C₂₇~C₂₉规则甾烷以“V”字型分布为主。核二段和核三段原油,陆源高等植物和低等水生生物均有贡献,且沉积环境较还原,核三下亚段原油成熟度明显高于核三上亚段原油,因此最终确定核三下亚段原油主要来源于核三下亚段烃源岩,而核三上亚段原油则为核三上亚段和核三下亚段烃源岩的混源油。

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	高儇博
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关键词 ：双河油田, 原油, 生物标志化合物, 气相色谱—质谱;, 油源对比

Abstract：

In this paper the authors mainly studied geochemical characteristics and oil-source rock correlations of 28 oil samples from the Shuanghe oilfield based on the gas chromatography-mass spectrometry and biomarkers. The results indicate that the peaks of C₁₉, C₂₀, C₂₁- tricyclic terpanes gradually rise and the peaks of C₂₇~C₂₉ steranes are characterized by "V" shape of crude oils in the Shuanghe Oilfield. Besides, the concentration of gammacerane is high. The peak shapes of saturates are characterized by "prepeak" and "double peak", and the relative values of diasteranes and tricyclic terpanes are low in oils from upper layer of the Eh₃ member. However, the peak shapes of saturates are characterized by "prepeak" and the relative content of diasteranes and tricyclic terpanes is high in oils from lower layer of the Eh₃ member. For both the oils of Eh₂ member and Eh₃ member, the sedimentary environments are reductive and are sourced from higher plant and aquatic organism. However, the maturity of the oil from lower layer of Eh₃ member is significantly higher than that of the oil from the upper layer of Eh₃ member. In conclusion, the oils from the lower layer of Eh₃ member are mainly sourced from the lower layer of Eh₃ member, and the oils from the upper layer of Eh₃ member are sourced from lower and upper layer of Eh₃ member.

Key words： Shuanghe oilfield crude oil biomarkers gas chromatography-mass spectrometry oil-source rock correlations

收稿日期: 2018-12-20 出版日期: 2019-10-25

P632

基金资助:国家科技重大专项子课题(2017ZX05049-005-005);国家青年科学基金项目(41402118);重庆市基础研究与前沿探索项目(cstc2018jcyjAX0503);重庆市教委科学技术研究项目(KJQN201801502)

通讯作者: 高儇博

作者简介: 章新文(1984-),男,高级工程师,主要从事石油勘探地质综合研究工作。Email: 853804448@qq.com

引用本文:

章新文, 高儇博, 杨云飞, 谢春安, 谭静娟. 泌阳凹陷双河油田原油地球化学特征及精细油—源对比研究[J]. 物探与化探, 2019, 43(5): 966-975.
Xin-Wen ZHANG, Xuan-Bo GAO, Yun-Fei YANG, Chun-An XIE, Jing-Juan TAN. Geochemistry and oil-source rock correlations in the Shuanghe oilfield, Biyang sag, Nanxiang basin. Geophysical and Geochemical Exploration, 2019, 43(5): 966-975.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2019.1470 或 https://www.wutanyuhuatan.com/CN/Y2019/V43/I5/966

Fig.1 泌阳凹陷构造划分及研究区位置

Table 1 双河油田原油族组分分析结果

Fig.2 双河油田典型原油样品正构烷烃GC-MS色谱(m/z 85)

井号	层位	深度/m	Pr/ nC₁₇	Ph/ nC₁₈	Pr/ Ph	∑nC₂₁-/ ∑nC₂₂+	主峰碳	OEP	低碳数甾烷/ 规则甾烷	重排甾烷/ 规则甾烷	C₂₉S/ (S+R)	C₂₉ββ/ (αα+ββ)	Ts/ Tm	C₂₉M/ C₃₀H	Tr/H	C₃₀G/ C₃₀H	C₂₄TeT/ C₂₆Tr
双浅3	H21	884.8	0.53	2.88	0.38	1.43	C₁₇	1.11	0.01	0.05	0.30	0.22	0.12	0.08	0.24	0.32	0.98
双资1	H31	1345.8	1.60	2.77	0.40	0.42	C₂₅	1.06	0.02	0.11	0.45	0.35	0.58	0.06	0.13	0.26	0.53
双T121	H31	1411.3	0.49	1.45	0.41	1.35	C₁₇	1.07	0.02	0.13	0.46	0.36	0.61	0.06	0.15	0.26	0.50
双T306L	H31	1378	0.55	1.43	0.33	0.44	C₂₇	1.01	0.04	0.11	0.49	0.36	0.50	0.14	0.22	0.21	0.49
双T306X	H31	1377.95	0.53	1.42	0.31	0.39	C₂₇	1.02	0.02	0.09	0.47	0.35	0.47	0.15	0.09	0.21	0.49
双3240	H32	1457.1	0.49	1.32	0.39	1.19	C₁₇	0.96	0.03	0.11	0.47	0.37	0.54	0.05	0.16	0.26	0.51
双资1	H33	1586.8	0.95	1.71	0.42	0.41	C₂₅	1.03	0.02	0.13	0.49	0.39	0.63	0.07	0.16	0.28	0.52
双资1	H33	1614.2	1.08	2.25	0.42	0.42	C₂₃	1.06	0.02	0.09	0.46	0.35	0.54	0.04	0.12	0.20	0.61
双K3103	H33	1649.7	0.45	1.37	0.40	1.02	C₁₇	0.96	0.02	0.12	0.47	0.37	0.59	0.05	0.12	0.22	0.52
双资1	H34	1722	1.09	2.16	0.38	0.31	C₂₇	1.03	0.02	0.12	0.45	0.37	0.53	0.07	0.08	0.26	0.55
双资2	H34	1660.8	1.47	1.93	0.32	0.27	C₁₈	0.94	0.06	0.17	0.55	0.54	1.41	0.33	0.67	0.38	0.43
双资2	H34	1799.5	0.88	1.02	0.67	0.51	C₂₂	1.03	0.07	0.19	0.53	0.51	0.74	0.33	1.30	0.50	0.52
双JK452	H34	1730.2	0.56	1.51	0.44	1.33	C₁₇	0.96	0.02	0.12	0.46	0.36	0.52	0.05	0.12	0.21	0.59
双H417L	H34	1752.9	0.50	1.33	0.33	0.46	C₂₇	1.02	0.03	0.10	0.50	0.38	0.53	0.15	0.14	0.19	0.52
双H417X	H34	1752.9	0.55	1.42	0.33	0.39	C₂₇	1.02	0.02	0.10	0.49	0.37	0.48	0.15	0.10	0.18	0.53
双资2	H35	1965.4	0.72	0.93	0.55	0.80	C₂₁	1.05	0.08	0.16	0.52	0.52	0.73	0.22	1.40	0.97	0.32
双资2	H35	1891.7	1.42	1.90	0.45	0.46	C₂₃	1.06	0.04	0.15	0.50	0.46	0.32	0.23	0.94	0.80	0.50
双资2	H35	1901	1.03	1.54	0.35	0.50	C₂₃	1.06	0.02	0.15	0.50	0.43	0.24	0.23	1.29	0.73	0.44
双3-23	H35	1917.6	0.33	0.61	0.55	1.64	C₁₈	0.95	0.08	0.19	0.56	0.55	1.45	0.30	0.85	0.26	0.43
双H494	H35	1758.4	0.62	1.77	0.46	1.58	C₂₂	0.97	0.07	0.12	0.54	0.52	0.81	0.18	0.11	0.26	0.56
双资2	H36	2028.3	0.87	1.69	0.34	0.60	C₂₂	1.09	0.06	0.17	0.50	0.47	0.39	0.30	1.27	0.83	0.34
双资2	H36	2097.9	0.86	1.41	0.46	1.05	C₂₀	0.96	0.06	0.17	0.51	0.47	1.29	0.27	1.01	0.67	0.37
双T4-136	H36	1953.6	0.43	1.06	0.51	1.62	C₁₇	1.05	0.04	0.13	0.49	0.43	3.35	0.19	0.96	0.71	0.42
双观20	H37	2005	0.46	1.31	0.42	1.73	C₁₇	1.06	0.07	0.20	0.53	0.50	0.80	0.68	1.38	0.96	0.26
双10-107	H37	1918.8	0.43	1.26	0.44	1.67	C₁₇	1.07	0.06	0.16	0.48	0.42	0.47	0.34	1.47	1.00	0.39
双资2	H38	2342.3	1.26	2.37	0.31	0.59	C₂₂	1.05	0.06	0.21	0.51	0.55	0.51	0.62	1.65	0.90	0.32
双资2	H38	2388.7	1.14	2.42	0.39	0.53	C₂₂	1.03	0.05	0.22	0.53	0.53	0.40	0.56	1.39	0.81	0.41
新泌42	H38	2282.4	0.59	1.93	0.32	2.70	C₁₇	1.06	0.00	0.00	0.50	0.46	0.30	0.07	1.00	1.08	0.38

Table 2 双河油田原油生物标志化合物参数

Fig.3 双河油田原油Pr/Ph、Pr/nC₁₇、Ph/nC₁₈分布三角图

Fig.4 双河油田典型原油样品甾烷GC-MS色谱(m/z 217)

Fig.5 双河油田原油C₂₇~C₂₉αααR甾烷相对含量三角图

Fig.6 双河油田原油C₂₉S/(S+R)和C₂₉ββ/(αα+ββ)相关图

Fig.7 双河油田典型原油样品萜烷GC-MS色谱图(m/z 191)

Fig.8 双河油田典型烃源岩和原油正构烷烃GC-MS色谱图(m/z 85)

Fig.9 双河油田典型烃源岩和原油萜烷GC-MS色谱图(m/z 191)

Fig.10 双河油田典型烃源岩和原油甾烷GC-MS色谱图(m/z 217)

Fig.11 双河油田原油和烃源岩Pr/Ph、Pr/nC₁₇、Ph/nC₁₈分布三角图

Fig.12 双河油田原油和烃源岩C₂₉S/(S+R)和C₂₉ββ/(αα+ββ)参数分布

Fig.13 双河油田原油和烃源岩伽马蜡烷指数与Pr/Ph参数分布

Fig.14 双河油田原油和烃源岩伽马蜡烷指数与三环萜烷/17α(H)-藿烷参数分布

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