激光拉曼光谱在有机包裹体研究中的应用——以苏里格气田西部盒8段油气包裹体为例

董会; 王志海; 董敏; 李宏; 魏小燕; 梁积伟

激光拉曼光谱在有机包裹体研究中的应用——以苏里格气田西部盒8段油气包裹体为例

董会^{1, 2,},
王志海^{1, 2},
董敏³,
李宏⁴,
魏小燕^{1, 2},
梁积伟^{2, 5}

1.
中国地质调查局西安地质调查中心, 陕西西安 710054
2.
岩浆成矿作用与找矿国土资源部重点实验室, 陕西西安 710054
3.
中国地质科学院地质力学研究所, 北京 100081
4.
陕西地矿物化探队, 陕西西安 710043
5.
长安大学资源学院, 陕西西安 710054

基金项目:

国家重点基础研究发展计划（"973"计划）项目 2003CB214602

国家科技重大专项 2008ZX05005-004-09HZ

西北大学大陆动力学国家重点实验开放基金项目 07LCB11

详细信息

作者简介:
董会(1981-), 女, 硕士, 工程师, 从事流体包裹体测试分析研究工作.E-mail:donghuidy@163.com

中图分类号: TE135
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出版历程
- 收稿日期: 2017-02-01
- 刊出日期: 2017-08-01

APPLICATION OF LASER RAMAN SPECTROSCOPY IN THE STUDY OF ORGANIC INCLUSIONS: A CASE STUDY ON OIL AND GAS INCLUSIONS IN THE 8^th MEMBER OF THE SHIHEZI FORMATION IN WESTERN SULIGE GASFIELD

DONG Hui^{1, 2
,},
WANG Zhihai^{1, 2},
DONG Min³,
LI Hong⁴,
WEI Xiaoyan^{1, 2},
LIANG Jiwei^{2, 5}

1.
Xi'an Center of Geological Survey, CGS, Xi'an 710054, Shaanxi, China
2.
Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR, Xi'an 710054, Shaanxi, China
3.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 10081, China
4.
Shaanxi geology and mineral survey and development Corporation of physical and chemical exploration team, Xi'an 710043, Shaanxi, China
5.
School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China

摘要

摘要: 以苏里格气田西部盒8段储层砂岩油气包裹体为例，应用激光拉曼探针微区原位分析技术，对其赋存于石英颗粒表面愈合裂隙、次生加大边的2期含烃有机包裹体的成分及其相对摩尔百分含量进行测定：早期包裹体主要为含气态烃和含盐水气态烃的气液两相有机包裹体，晚期包裹体为含气态烃气液两相有机包裹体；其气相成分以CO₂、CH₄和N₂等气体为主，溶解有CO、H₂S、H₂、C₂H₂、C₂H₄、C₂H₆、C₄H₆等气体；液相成分以H₂O和CO₂为主，此外还含有极少量的阴离子SO₄^2-和CO₃^2-离子（小于0.03 mol/L）。研究表明：早期有机包裹体含有大量CO₂无机气体、H₂O和少量低碳烷烃，说明早期有机质成熟度处于未成熟—低成熟阶段，虽有天然气生成，但运移规模有限，形成的有机包裹体极少，反映了天然气进入储层后置换地层水的过程；晚期有机包裹体与之相反，烃类和N₂含量均较高，而CO₂无机气体和H₂O含量均较低，可见晚期有机包裹体代表了油气形成高峰和大规模进入储层成藏期间的流体特征，为有机质的热演化程度，油气生成、运移，划分油气成藏期次提供了科学依据。
- 苏里格气田 /
- 显微激光拉曼 /
- 有机包裹体 /
- 气相成分 /
- 液相成分
Abstract: Based on the application of laser raman microprobe analysis in situ technique, the nature of oil and gas inclusions in the 8^th member of the Shihezi formation in western Sulige gas field was identified. The composition and relative molar fraction of phaseⅡhydrocarbon-bearing organic inclusions in the healing fracture of the quartz grain surface and in the secondary enlargement margin were determined. The results show that the early-stage inclusions mainly are gas-liquid two-phase organic inclusions containing gaseous hydrocarbon and brine gaseous hydrocarbon, and the late-stage inclusions are gas-liquid two-phase organic inclusions containing gaseous hydrocarbon; The gas phase is dominated by gases such as CO₂, CH₄ and N₂, and the CO, H₂S, H₂, C₂H₂, C₂H₄, C₂H₆, C₄H₆, H₂O and CO₂are dissolved in it; the liquid phase mainly is consist of H₂O and CO₂, and also contains a very small amount of anion SO₄^2- and CO₃^2-(less than 0.03 mol/L). The research makes clear that the early-stage organic inclusions contain large amounts of CO₂, H₂O and a small amount of inorganic gas of low carbon alkane. It indicates that the early maturity of organic matter was in immature-low mature stage. Although natural gas is generated, the migration is limited in scale. The organic inclusions are few and far between. It reflects the replacement of formation water by natural gas entering reservoir. The late-stage organic inclusions are the opposite. The content of hydrocarbons and N₂ are higher, but the content of CO₂, inorganic gas and H₂O are lower. It represents the characteristics of the peak of oil and gas formation and large-scale oil and gas accumulation. It provides a scientific basis for the thermal evolution of organic matter, the generation and migration of oil and gas, and the division of oil and gas accumulation stages.
- Sulige gas field /
- micro laser raman spectroscopy /
- organic inclusions /
- gas phase composition /
- liquid phase composition

HTML全文

图 1 不同相态流体包裹体激光拉曼光谱图

Figure 1. Laser raman spectroscopy of fluid inclusions in different phases

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图 2 苏53井盒8段早、晚期包裹体气相成分特征对比图

Figure 2. Comparison diagrams of composition characteristics of the fluid inclusions in gas phase in early and late stages in the 8^th He of Su 53 gas & liquid field

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图 3 苏53井盒8段早、晚期包裹体气、液相成分对比图

Figure 3. Comparison diagrams of composition of inclusions in gas-liquid phases in early and late stages in the 8^th He of Su 53 gas & liquid field

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表 1 苏里格西部探区盒8段油气包裹体样品地质特征

Table 1. Geological characteristics of oil and gas inclusion samples in the 8^th member of the Shihezi formation of Western Sulige exploration area

井号	样号	层位	深度/m	气/水层	岩性
苏53	S53-2-1	盒8	3340.75	—	石英砂岩
苏53	S53-1	盒8	3339.67	—	石英砂岩
苏53	S53-2-2	盒8	3340.75	—	石英砂岩
苏65	S65-1(1)	盒8	3558.55	—	石英砂岩
苏65	S65-1-1(2)	盒8	3558.55	—	石英砂岩
苏65	S65-1-2	盒8	3558.55	含气层	石英砂岩
苏75	S75-2	盒8	3342.1	—	石英砂岩
苏60	S60-4	盒8	3672.62	含气层	岩屑石英砂岩
苏89	S89-2-2	盒8	3581.2	含气层	岩屑石英砂岩
苏100	S100-3	盒8	3334.93	—	石英砂岩

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表 2 苏里格气田西部探区盒8段流体包裹体气相激光拉曼分析结果

Table 2. Analysis results of laser raman spectroscopy of fluid inclusions in the 8^th member of the Shihezi formation of Western Sulige exploration area

井号	样号	包裹体期次	层位	宿主矿物	包裹体类型	气相/%(摩尔数的相对百分含量)
井号	样号	包裹体期次	层位	宿主矿物	包裹体类型	CO₂	H₂S	CH₄	N₂	H₂	O₂	C₂H₂	C₂H₄	C₂H₆	C₄H₆	总和
苏53	S53-2-1	晚期	盒8	石英裂隙	气液两相包裹体			51.4	44.2			1.1	3.3			100.0
苏53	S53-1	早期	盒8	石英裂隙	气液两相包裹体	91.8	2.9	2.8		2.5						100.0
苏75	S75-2	早期	盒8	石英碎屑	气液两相包裹体	84.7		13.8	1.5							100.0
苏65	S65-1(1)	晚期	盒8	石英碎屑	气液两相包裹体			84.6					15.4			100.0
苏65	S65-1-2	早期	盒8	石英裂隙	气液两相包裹体	60.9								32.1	7.0	100.0
苏60	S60-4	早期	盒8	石英裂隙	纯气相包裹体	96.8			3.2							100.0
苏89	S89-2-2	早期	盒8	石英裂隙	纯气相包裹体	92.6		5.5	1.9							100.0
苏100	S100-3	晚期	盒8	石英裂隙	气液两相包裹体		9.1		51.7		39.2					100.0

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表 3 苏里格气田西部探区盒8段流体包裹体液相激光拉曼分析结果

Table 3. Analysis results of laser raman spectroscopy of fluid inclusions in liquid phase

井号	样号	包裹体期次	层位	宿主矿物	包裹体类型	液相/%(摩尔数的相对百分含量)
井号	样号	包裹体期次	层位	宿主矿物	包裹体类型	CO₂	H₂S	CH₄	CO	H₂O	C₂H₆	C₄H₆	总和	SO₄^2-	CO₃^2-
苏53	S53-2-1	晚期	盒8	石英裂隙	气液两相包裹体			1.0		91.6		7.4	100.0
苏53	S53-1	早期	盒8	石英裂隙	气液两相包裹体	16.4				82.6	1.0		100.0		0.01
苏75	S75-2	早期	盒8	石英碎屑	气液两相包裹体	32.0				68.0			100.0	0.03
苏65	S65-1(1)	晚期	盒8	石英碎屑	气液两相包裹体					90.2	9.8		100.0
苏65	S65-1-2	晚期	盒8	石英碎屑	气液两相包裹体				18.9	74.4	6.7		100.0
苏53	S53-2-2	早期	盒8	石英裂隙	纯液相包裹体	63.7		0.4		35.9			100.0		0.03
苏65	S65-1-1(2)	早期	盒8	石英裂隙	纯液相包裹体	34.0				66.0			100.0
苏100	S100-3	晚期	盒8	石英裂隙	气液两相包裹体		4.8	2.8		89.3	3.1		100.0

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