关中盆地韩城大断裂东南地区浅部地温垂向分布特征浅析

doi:10.13809/j.cnki.cn32-1825/te.2022.06.002

Abstract

Abstract:

Inorder to further study the vertical distribution characteristics of the shallow geothermal temperature field in the southeastern of Hancheng, Guanzhong Basin. The authors used temperature measuring cable, which is single line multipoint communication, to monitor stratum temperature in a depth of 50 meters for one year in Hancheng. The results shows that the vertical distribution of shallow geothermal temperature is regularity and obviously layered, it can be differentiated as variable temperature zone, constant temperature zone and increased temperature zone. The buried depth of the bottom of variable temperature zone is 15 m, it is significantly affected by climate. Compared with the temperature change of atmosphere, the variable temperature zone has a hysteresis phenomenon. The constant temperature zone depth range is between 15~35 m, and the average temperature is 15.3 ℃, 1.8 ℃ higher than the annual average atmospheric temperature in the same region. The increased temperature zone is below 35 m, and the geothermal gradient is 3.25 ℃/hm within 35~100 m, which is higher than surrounding area. It is concluded that there are three reasons: firstly, the Hancheng fault is heat conduction channel to carry deep heat to shallow formations; secondly, the groundwater runoff intensity is relatively weak to save heat; thirdly, the loose stratum of quaternary and neogene is thick, which can reduce thermal conduction.

Key words: geothermal resources, geothermal gradient, vertical distribution, shallow stratum geothermal field, Hancheng fault, Guanzhong Basin

CLC Number:

TE02

XUE Yuze,ZHANG Yugui,HAN Yuanhong,ZHANG Tinghui,XUE Chao,XIAO Juhui,PENG Zhenzhou,GUO Bin. Vertical distribution characteristics analysis of shallow stratum geothermal temperature field in the Southeastern Hancheng Fault, Guanzhong Basin[J].Petroleum Reservoir Evaluation and Development, 2022, 12(6): 843-849.

Figures/Tables 8

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Table 1

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深度（m）	温度（℃）
	2020年								2021年
	5月	6月	7月	8月	9月	10月	11月	12月	1月	2月	3月	4月
大气	21.5	24.0	24.0	24.5	20.5	12.0	12.0	7.5	1.0	6.0	10.0	13.5
5.0	13.6	16.0	17.5	19.5	19.7	18.7	15.7	14.0	11.7	10.9	11.0	11.7
10.0	15.1	15.5	15.5	15.5	15.7	15.9	16.0	16.0	16.1	15.9	15.7	15.3
12.5	15.5	15.5	15.3	15.3	15.3	15.3	15.5	15.4	15.5	15.6	15.5	15.5
15.0	15.4	15.4	15.4	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
17.5	15.4	15.4	15.4	15.4	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
20.0	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
22.5	15.3	15.2	15.3	15.3	15.2	15.3	15.2	15.2	15.2	15.3	15.3	15.3
25.0	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
27.5	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
30.0	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
32.5	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3	15.3
35.0	15.5	15.4	15.4	15.4	15.4	15.4	15.4	15.4	15.4	15.4	15.4	15.4
40.0	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6
45.0	15.8	15.8	15.8	15.7	15.7	15.7	15.7	15.7	15.7	15.7	15.7	15.7
50.0	15.9	15.9	15.9	15.9	15.8	15.9	15.9	15.9	15.8	15.8	15.9	15.9

Vertical distribution characteristics analysis of shallow stratum geothermal temperature field in the Southeastern Hancheng Fault, Guanzhong Basin

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