鄂尔多斯盆地延长油气区地热资源赋存特征及开发利用建议

白奋飞; 魏登峰; 韩伟; 王菲菲

doi:10.12401/j.nwg.2023068

鄂尔多斯盆地延长油气区地热资源赋存特征及开发利用建议

1.
陕西延长石油（集团）有限责任公司研究院，陕西西安　710065

2.
中国地质调查局西安地质调查中心，陕西西安　710119

基金项目: 陕西省重点研发项目“延长油气区大地热流调查与地温场分布研究”（2018GY-090），国家自然科学基金重点项目“鄂尔多斯、沁水沉积盆地中生代晚期古地温场对岩石圈动力学演化及油气赋存的约束作用”（41630312）资助。

详细信息

作者简介: 白奋飞（1982−），男，高级工程师，主要从事油气及地热资源发展战略研究工作。E–mail：baifenfei@163.com

通讯作者: 韩伟（1981−），男，教授级高工，主要从事油气资源调查评价工作。E–mail：hw_198196@163.com

中图分类号: P962

收稿日期: 2023-01-05

修回日期: 2023-04-18

录用日期: 2023-04-19

刊出日期: 2023-12-20

Occurrence Characteristics and Exploitation of Geothermal Resources in Yanchang Oil and Gas Area of Ordos Basin

1.
Reseach Institute of Yanchang Petroleum (Group) Co. Ltd, Xi’an 710065, Shaanxi, China

2.
Xi’an Center of China Geological Survey, Xi’an 710119, Shaanxi, China

More Information

Corresponding author: HAN Wei, hw_198196@163.com

Received Date: 05 January 2023

Revised Date: 18 April 2023

Accepted Date: 19 April 2023

Publish Date: 20 December 2023

摘要

摘要:
鄂尔多斯盆地蕴含丰富的中低温地热能源，通过对其中延长油气区地热资源赋存状态研究，发现区内主要有西部白垩系碎屑岩和东部石炭系—侏罗系碎屑岩两套热储层；岩石热导率与地层岩石的成岩程度、孔隙度等关系密切；地温梯度为2.73～3.50 ℃/100 m，整体显示北高南低，与地层埋深呈正相关；大地热流值为57.28～86.18 mW/m²，具有明显的东西向展布特征。综合分析认为：区内地热资源东部优于西部，可具体划分浅层低温有利区、中层中低温有利区和中深层中温有利区等3类地热资源有利区。结合油田地热资源开发利用实例，认为对这些有利区内的废弃井加以改造利用，可降低地热开发工程成本，在地热发电、工业利用及三产养殖等方面实现地热资源梯级利用，有望建立“源网荷储一体化”的能源互联网构架。
- 鄂尔多斯盆地 /
- 延长油气区 /
- 地热 /
- 废弃井利用 /
- 清洁能源
Abstract:
Ordos Basin is rich in geothermal energy at moderate and low temperature. By studying the occurrence state of geothermal resources in Yanchang oil and gas area, it is found that there are mainly two sets of thermal reservoirs: Cretaceous clastic rocks in the west and Carboniferous and Jurassic clastic rocks in the east; The thermal conductivity of rock is closely related to the degree of diagenesis and porosity of formation rock; The geothermal gradient is 2.73–3.50 ℃/100 m, which is higher in the north and lower in the south; The earth heat flow value is 57.28–86.18 mW/m², with obvious east–west distribution characteristics. The comprehensive analysis shows that the geothermal resources in the eastern part of the region are better than those in the western part, and can be divided into three types: shallow low temperature favorable area, middle–low temperature favorable area and middle-deep medium temperature favorable area. Combined with the exploitation and utilization examples of geothermal resources in oil fields, it is considered that the transformation and utilization of abandoned Wells in these favorable areas can reduce the cost of geothermal development projects and realize the stepwise utilization of geothermal resources in geothermal power generation, industrial utilization and three–production and aquaculture, it is expected to establish an energy internet framework of "Source network load storage integration".
- Ordos basin /
- Yanchang oil and gas area /
- geothermal heat /
- utilization of abandoned wells /
- clean energy

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图 1 延长油气区位置（a）与热储分布（b）图

Figure 1.

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图 2 研究区不同岩性热导率与深度对应关系（据任战利等，2007）

Figure 2.

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图 3 延长油气区地层温度与深度关系（据任战利等，2007）

Figure 3.

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图 4 延长油气区地温梯度、大地热流和地热有利区分布

Figure 4.

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表 1 延长油气区岩石热导率测试分析表

Table 1. Test and analysis table of rock thermal conductivity in Yanchang oil and gas area

序号	地区	井号	取样层位	岩性	深度（m）	干样热导率（W/mk）	饱和水热导率（W/mk）
1	甘泉	C114	中生界延长组	细砂岩	702.88	1.75	2.31
2	富县	FX123	中生界延长组	泥岩	1408.50	1.45	1.59
3		FX329	中生界延长组	砂岩	1423.88	1.44	1.58
4		L227	中生界延长组	砂岩	1430.88	1.12	1.62
5		L157	中生界延长组	砂岩	1792.50	1.47	1.82
6	延长	C88	上古生界山西组	砂岩	2295.50	2.84	3.56
7	延长	C88	上古生界山西组	细砂岩	2298.50	3.05	3.46
8	黄陵	Y883	下古生界本溪组	灰岩	3488.03	2.66	2.46
9	安塞	Y708	下古生界马家沟组	白云岩	2730.79	5.03	4.58
10			下古生界马家沟组	白云岩	2735.56	5.21	4.92
11			下古生界马家沟组	白云岩	2737.69	3.55	4.73
12	志丹	YT706	下古生界马家沟组	白云岩	2843.50	2.63	2.47

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表 2 延长油气区地温梯度、大地热流值估算表（1HFU=41.86 mW/m²）

Table 2. Estimated value of geothermal gradient and terrestrial heat flow in Yanchang oil and gas area

地区	油田	井数（口）	深度（m）	层位	组段	地温梯度（℃/100 m）	研究段热导率	热流量q（HFU）	热流量q（mW/m²）
北部	定边	4	1550.00～2000.00	J₁	延安组	2.77～2.80	4.94～5.23	1.37～1.46	57.28～61.08
		3	1668.00～2166.00	T₃	长2	2.74～2.79	5.23	1.43～1.46	60.01～61.10
		1	1942.00～2444.00	T₃	长4+5	2.8	5.23	1.47	61.32
	靖边	7	700.00～1100.00	T₃	长2	3.00～3.22	4.92～5.27	1.57～1.62	65.70～67.73
中部	安塞	1	942.00	T₃	长2	2.97	5.23	1.55	65.05
		2	1120.00～1300.00	T₃	长6	2.92	5.27～5.48	1.54～1.60	64.42～67.00
		1	3012.00～3480.00	P₁	本溪组	2.51	6.32	1.59	66.41
	延安	1	平均757.00	T₃	长4+5+6	3.03	5.23	1.59	66.36
	延安	8	407.00～725.00	T₃	长6	2.93～3.33	4.87～5.46	1.60～1.63	67.02～68.39
	吴起	1	1294.00～1335.00	J₁	延安组	2.72～2.78	5.41	1.47～1.50	61.60～62.96
		1	1900.00	T₃	长4+5²	2.79	5.46	1.52	63.81
		2	1897.00～1982.00	T₃	长6	2.73～2.78	5.23～5.48	1.45～1.50	60.86～62.64
		1	1980.00	T₃	长8	2.91	4.94	1.44	60.18
	志丹	3	1564.00～1689.00	T₃	长6	2.77～3.00	4.94～5.27	1.46～1.48	61.11～62.04
	志丹	1	1830.00～2090.00	T₃	长8-10	2.88	5.23	1.51	63.08
	延长	1	2295.00～2298.00	P₁	山西组	3.11	5.23	1.63	68.10
	子长	1	890.00～920.00	T₃	长6	2.91	5.48	1.60	66.77
南部	甘泉	5	平均510.00	T₃	长2	3.08～3.20	4.94～5.18	1.54～1.59	64.52～66.72
	甘泉	2	679.00～857.00	T₃	长6	2.89～2.92	5.48	1.59～1.60	66.31～67.00
	宜川	2	681.00～804.00	T₃	长8	2.73～2.77	5.99	1.64～1.66	68.50～69.50
	富县	1	895.00	T₃	长2	2.98	5.23	1.56	65.27
		1	1394.00	T₃	长7	2.93	5.23	1.53	64.17
		3	1250.00～1458.00	T₃	长8	2.85～3.08	4.94～5.46	1.52～1.57	63.69～65.70
		1	2731.00～2737.00	O₁	马家沟组	2.66	7.74	2.06	86.18

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表 3 延长油气开发区钻井静压–静温梯度综合数据表

Table 3. Comprehensive data of drilling static pressure–static temperature gradient in Yanchang oil and gas development region

井区	井号	测点	测点深度（m）	测点压力（MPa）	压力差（MPa）	压力梯度（MPa/100 m）	测点温度（℃）	温度差（℃）	温度梯度（℃/100 m）
延安	1号井	1	524.55	0.80	–	–	23.48	–	–
		2	574.50	0.97	0.17	0.85	24.17	0.69	3.45
		3	624.50	1.13	0.16	0.82	24.85	0.68	3.40
		4	674.50	1.30	0.17	0.83	25.46	0.61	3.05
		5	724.50	1.45	0.16	0.78	26.15	0.69	3.45
	2号井	1	644.00	0.23	–	–	30.84	–	–
		2	664.00	0.41	0.18	0.90	31.51	0.67	3.35
		3	684.00	0.59	0.19	0.93	32.18	0.67	3.35
		4	704.00	0.76	0.17	0.84	32.84	0.66	3.30
		5	724.00	0.94	0.18	0.89	33.47	0.63	3.15
	3号井	1	598.00	0.00	–	–	27.52	–	–
		2	618.00	0.10	0.10	–	28.13	0.61	3.05
		3	638.00	0.27	0.17	0.83	28.73	0.60	3.00
		4	658.00	0.44	0.17	0.87	29.30	0.57	2.85
		5	678.00	0.63	0.19	0.96	29.91	0.61	3.05
靖边	4号井	1	391.00	0.90	–	–	18.73	–	–
		2	441.00	1.35	0.46	0.91	20.48	1.75	3.50
		3	491.00	1.85	0.50	1.00	22.03	1.55	3.10
		4	541.00	2.35	0.50	1.00	23.62	1.59	3.18
		5	591.00	2.86	0.50	1.01	25.22	1.60	3.20
		6	641.00	3.35	0.50	0.99	26.87	1.65	3.30
		7	691.00	3.85	0.50	1.00	28.45	1.58	3.16
		8	741.00	4.35	0.50	1.00	30.08	1.63	3.26
		9	791.00	4.86	0.51	1.02	31.64	1.56	3.12
		10	841.00	5.36	0.50	1.00	33.20	1.56	3.12

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