斜坡—沉积源岩型氦气富集模式——以鄂尔多斯盆地神木气田为例

丁振刚; 刘成林; 范立勇; 康锐; 陈践发; 王海东; 洪思婕; MUHAMMAD Aslam Khan

doi:10.11781/sysydz2024061177

斜坡—沉积源岩型氦气富集模式——以鄂尔多斯盆地神木气田为例

doi: 10.11781/sysydz2024061177

丁振刚^{1, 2,},
刘成林^{1, 2, ,},
范立勇³,
康锐³,
陈践发^{1, 2},
王海东^{1, 2},
洪思婕^{1, 2},
MUHAMMAD Aslam Khan^{1, 2}

1.
中国石油大学(北京) 油气资源与探测国家重点实验室, 北京 102249
2.
中国石油大学(北京) 地球科学学院, 北京 102249
3.
中国石油长庆油田分公司勘探开发研究院, 西安 710018

基金项目:

国家重点研发计划 2021YFA0719000

详细信息

作者简介:
丁振刚(1994—), 男, 博士生, 从事天然气地球化学研究。E-mail: 939802641@qq.com

通讯作者:
刘成林(1970—), 男, 博士, 教授, 从事天然气成藏和油气资源评价研究。E-mail: liucl@cup.edu.cn

中图分类号: TE132.3
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- 被引次数: 0
出版历程
- 收稿日期: 2023-12-15
- 修回日期: 2024-10-14
- 刊出日期: 2024-11-28

Slope—sedimentary source rock-type helium enrichment model: a case study of Shenmu Gas Field, Ordos Basin

DING Zhengang^{1, 2
,},
LIU Chenglin^{1, 2
, ,},
FAN Liyong³,
KANG Rui³,
CHEN Jianfa^{1, 2},
WANG Haidong^{1, 2},
HONG Sijie^{1, 2},
MUHAMMAD Aslam Khan^{1, 2}

1.
State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
2.
College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China
3.
Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710018, China

摘要

摘要: 鄂尔多斯盆地氦气资源丰富，已在伊盟隆起、伊陕斜坡南部等地区发现高含氦、富氦天然气田，这些气田的氦气富集多与断裂发育密切相关。然而，盆地内的构造背景较为复杂，为研究盆地内不同地质背景下氦气的富集特征及控制因素，对鄂尔多斯盆地伊陕斜坡东北部开展天然气组分分析测试，并结合研究区基础地质资料及前人研究成果，对鄂尔多斯盆地神木气田上古生界的氦气分布特征及其地质影响因素进行探究。神木气田上古生界氦气含量达0.017%~0.116%，平均氦气含量为0.05%，达到含氦气田标准；氦气含量在平面上呈“西低东高”的整体分布格局，东部部分地区的氦气含量大于0.1%；氦气含量与氮气含量呈明显正相关关系，表明天然气藏中的氦气和氮气在成因和溶解—脱溶机制上可能存在必然联系。神木气田氦气的富集受多种地质因素共同影响：上古生界广泛分布的煤系烃源岩提供了充足的氦气；地壳抬升和构造反转控制了氦气的运移方向，且促进了溶解氦的脱溶和聚集；适量的载体气有助于氦气的富集。结合研究区构造背景和氦气成藏地质因素，提出了一种新的氦气富集模式，即斜坡—沉积源岩型含氦天然气富集模式，这为氦气勘探和开发工作提供了重要的理论支持。
- 构造运动 /
- 斜坡—沉积源岩型 /
- 氦气 /
- 上古生界 /
- 神木气田 /
- 鄂尔多斯盆地
Abstract: The Ordos Basin is rich in helium resources, with high helium and helium-rich natural gas fields discovered in areas such as the Yimeng Uplift and the southern Yishan Slope. The enrichment of helium in these gas fields is often closely related to the development of faults. However, the structural background within the basin is complex. To study the characteristics and controlling factors of helium enrichment under different geological backgrounds within the basin, an analysis of natural gas composition was conducted in the northeastern Yishan Slope of the Ordos Basin. Combining basic geological data of the study area and previous research findings, the helium distribution characteristics and geological influencing factors in the Upper Paleozoic of the Shenmu Gas Field in the Ordos Basin were explored. The results showed that the helium content in the Upper Paleozoic of the Shenmu Gas Field ranged from 0.017% to 0.116%, with an average content of 0.05%, meeting the standard of a helium-containing gas field. The helium content showed a spatial distribution pattern of "low in the west and high in the east", with helium content exceeding 0.1% in some eastern areas. There was a significant positive correlation between helium and nitrogen content, indicating a possible inherent connection between the genesis and dissolution-exsolution mechanisms of helium and nitrogen in natural gas reservoirs. The enrichment of helium in the Shenmu Gas Field was influenced by various geological factors: (1) The widely distributed coal-measure source rocks in the Upper Paleozoic provided ample helium; (2) Crustal uplift and tectonic inversion controlled the migration direction of helium and promoted the exsolution and accumulation of dissolved helium; (3) An appropriate amount of carrier gas aided in helium enrichment. Based on the tectonic conditions of the study area and the geological factors controlling helium accumulation, a new helium enrichment model was proposed, the slope-sedimentary source rock-type helium-rich natural gas enrichment model, providing theoretical support for helium exploration and development.
- tectonic movement /
- slope-sedimentary source rock type /
- helium /
- Upper Paleozoic /
- Shenmu Gas Field /
- Ordos Basin
注释:

利益冲突声明/Conflict of Interests

作者刘成林是本刊编委会成员，未参与本文的同行评审或决策。

Auther LIU Chenglin is an Editorial Board Member of this journal, and he did not take part in peer review or decision making of this article.

作者贡献/Authors’Contributions

丁振刚、刘成林、陈践发参与实验设计；王海东、洪思婕完成实验操作；范立勇、康锐提供了研究区的基础资料；丁振刚、刘成林、Muhammad Aslam Khan参与论文写作和修改。所有作者均阅读并同意最终稿件的提交。

The study was designed by DING Zhengang, LIU Chenglin, and CHEN Jianfa. The experimental operation was completed by WANG Haidong and HONG Sijie. The basic information of the study area was provided by FAN Liyong and KANG Rui. The manuscript was drafted and revised by DING Zhengang, LIU Chenglin, and MUHAMMAD Aslam Khan. All authors have read the last version of the paper and consented to its submission.

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图 1 鄂尔多斯盆地神木气田地理位置及部分采样井分布

Figure 1. Geographic location (a) and distribution of some sampling wells (b) in Shenmu Gas Field, Ordos Basin

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图 2 鄂尔多斯盆地神木气田氦气生、储、盖组合柱状图

Figure 2. Column chart of helium generation, storage, and seal assemblages in Shenmu Gas Field, Ordos Basin

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图 3 鄂尔多斯盆地神木气田及周缘天然气He含量与干燥系数(a)、CO₂(b)和N₂(c)的相关性

Figure 3. Correlation between helium(He) content with dryness coefficient (a), CO₂ (b), and N₂ (c) in Shenmu Gas Field and surrounding areas of Ordos Basin

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图 4 鄂尔多斯盆地神木气田氦气含量平面分布

Figure 4. Planar distribution of helium content in Shenmu Gas Field, Ordos Basin

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图 5 鄂尔多斯盆地神木地区氦气释放模式

据参考文献[37]修改。

Figure 5. Helium release pattern in Shenmu area of Ordos Basin

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图 6 鄂尔多斯盆地神木气田构造演化

据参考文献[38]修改。

Figure 6. Tectonic evolution of Shenmu Gas Field in Ordos Basin

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图 7 鄂尔多斯盆地神木气田油气成藏热演化与氦气的关系

Figure 7. Relationship between thermal evolution of hydrocarbon accumulation and helium in Shenmu Gas Field, Ordos Basin

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图 8 鄂尔多斯盆地神木气田斜坡型氦气富集模式

Figure 8. Slope-type helium enrichment model in Shenmu Gas Field, Ordos Basin

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表 1 鄂尔多斯盆地神木气田及周缘天然气组分特征

Table 1. Characteristics of natural gas composition in Shenmu Gas Field and surrounding areas of Ordos Basin

编号	气田	井代号	烃类气体组分特征				非烃气组分含量
编号	气田	井代号	C₁/%	C_2-5/%	C₂₊/C₁₊	C₁/C_1-5	CO₂/%	N₂/%	He/%	H₂/%
1	神木气田	SG-39	85.622	6.878	0.07	0.93		2.106	0.120	0.036
2		SG-79	90.204	3.357	0.04	0.96		1.443	0.082	0.014
3		SN-44	82.009	9.304	0.10	0.90	0.030	3.884	0.085	0.013
4		SG-50	88.787	6.474	0.07	0.93	0.584	0.352	0.030	0.028
5		SG-58C4	88.873	5.878	0.06	0.94	1.242	0.206	0.017	0.010
6		SG-50C3	89.296	6.489	0.07	0.93	0.594	0.343	0.029	0.028
7		MT-3	91.940	1.393	0.01	0.99	3.439	0.124	0.018
8		MT-3C6	92.491	1.338	0.01	0.99	3.472	0.109	0.019
9		SG-39C3	85.185	8.299	0.09	0.91	0.036	1.746	0.091	0.060
10		SG-58	90.075	4.161	0.04	0.96	0.881	0.421	0.032	0.012
11		SG-38C1	92.577	1.860	0.02	0.98	1.750	0.233	0.019
12	榆林气田	Y-44	89.806	4.424	0.05	0.95	1.765	0.284	0.028	0.028
13		Y-45	89.658	4.761	0.05	0.95	1.005	0.294	0.025	0.014
14		SG-107	88.317	5.706	0.06	0.94	0.695	0.345	0.026	0.021
15		SG-135	85.112	8.554	0.09	0.91	1.327	0.305	0.017	0.010
16		Y-47C6	87.465	7.096	0.08	0.92	0.925	0.314	0.028	0.032
17		Y-40	90.397	3.705	0.04	0.96	0.812	0.584	0.040	0.026
18		Y-40C8	91.017	2.715	0.03	0.97	1.861	0.346	0.030	0.050
19		Y-41	88.924	5.276	0.06	0.94	1.042	0.318	0.025	0.015
20		Y-34	89.804	3.645	0.04	0.96	0.925	0.662	0.032	0.035
21		Y-29	89.442	3.932	0.04	0.96	1.758	0.267	0.023	0.010
22	子洲—米脂气田	M-69	91.122	4.367	0.05	0.95	0.042	0.507	0.032	0.017
23		M-31	89.732	5.470	0.06	0.94	0.574	0.540	0.035	0.019
24		M-22C2	90.880	3.266	0.03	0.97	1.538	0.305	0.028	0.012
25		ZU-18	92.534	1.236	0.01	0.99	2.055	0.199	0.028	0.036
26		ZU-19	89.512	4.764	0.05	0.95	0.954	0.404	0.037	0.030
27		ZU-5-14	87.646	6.377	0.07	0.93	0.580	0.433	0.032	0.036
28		ZU-5-13	86.571	6.211	0.07	0.93	2.454	0.274	0.023	0.015
29		ZU-7-14	90.477	3.845	0.04	0.96	1.316	0.270	0.024	0.022

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