Distribution of Present Geothermal Field and Evaluation of Geothermal Resources in the Western Uplift of the Junggar Basin

doi:10.7657/XJPG20260110

Abstract

Abstract:

Geothermal resources, as clean and stable non-carbon-based energy sources, are of great significance for China to achieve its “Dual Carbon” goals. The geothermal resources in the Junggar Basin have been insufficiently studied. This paper discusses the distribution of present geothermal field and performs the evaluation of geothermal resources in the western uplift of the Junggar Basin. Based on the high-quality, continuous temperature measurement data from 11 wells, the distribution characteristics of geothermal gradient and terrestrial heat flow were analyzed. Using the one-dimensional steady-state heat conduction equation, the planar distribution of temperature in the strata shallower than 5 000 m was revealed. On this basis, the geothermal resources of 7 sets of geothermal reservoirs (including the Carboniferous and above systems) were evaluated. The results show that, in the western uplift of the Junggar Basin, the average geothermal gradient is (21.3±3.0) ℃/km, and the average terrestrial heat flow is (43.9±6.9) mW/m². In the Zhongguai bulge, a relatively high-temperature anomaly area, the average geothermal gradient is (23.3±2.8) ℃/km, and the average terrestrial heat flow is (47.9±5.8) mW/m². The formation temperature at a depth of 4 000 m ranges from 78.0 ℃ to 122.9 ℃ in the western uplift, with an average of 100.7 ℃ in the Zhongguai bulge, indicating a good geothermal potential. The geothermal resources are estimated to be 411.24 EJ in the study area, with the largest quantity (132.61 EJ) endowed in the Permian, followed by the Carboniferous (121.52 EJ). The largest fluid resources are registered by the Cretaceous, reaching 19.58 EJ. This study provides key parameters for the development and utilization of geothermal resources in the western uplift and also offers a methodological reference for geothermal evaluation in other areas of the Junggar Basin.

Key words: Junggar Basin, western uplift, present geothermal field, terrestrial heat flow, thermal conductivity, geothermal resource

CLC Number:

P314

LU Hui, WANG Fei, ZHANG Yidan, WANG Junwei, ZHANG Jinlong, CHEN Lei, XIAO Bei, YANG Huang, LI Chen. Distribution of Present Geothermal Field and Evaluation of Geothermal Resources in the Western Uplift of the Junggar Basin[J]. Xinjiang Petroleum Geology, 2026, 47(1): 92-102.

Figures/Tables 12

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井名	测温区间/ m	静井时间/ d	拟合系数	地温梯度/ （℃·km^-1）	岩石热导率/ （W·m^-1·K^-1）	大地热流/ （mW·m^-2）
JL2002井	300~4 230	18	0.999	21.7	2.11	45.6
白251井	100~2 700	26	0.999	22.8	2.18	49.6
百512井	100~1 230	12	0.994	20.3	2.04	41.3
车探1井	100~3 750	10	1.000	19.1	2.10	40.2
红832井	200~2 400	17	0.999	23.5	2.12	49.7
金209井	300~4 100	20	0.999	21.8	2.08	45.4
金龙108井	100~3 120	23	0.999	23.9	2.06	49.4
金龙11井	0~3 030	26	0.996	27.2	2.06	56.2
金龙20井	510~3 270	20	0.999	22.9	2.20	50.3
克016井	100~3 000	5	0.999	25.1	2.12	53.3
克88井	500~3 000	16	0.999	22.8	2.24	51.1

热储	深度/m	热储面积/km²	热储厚度/m	地层温度/℃	孔隙度/%
新近系+第四系	19.3~141.2	4 756.88	38.7~282.3	18.0~20.8	0.10~39.67
古近系	6.4~2 197.8	4 837.92	12.8~52.5	18.1~61.1	0.10~33.22
白垩系	125.6~2 625.7	6 138.24	68.0~195.0	20.4~69.5	0.10~39.87
侏罗系	592.5~3 642.1	4 490.84	33.8~141.4	29.2~89.4	0.06~39.96
三叠系	1 277.4~4 247.0	3 515.76	88.1~110.4	42.1~101.2	0.03~36.69
二叠系	2 207.4~5 065.1	2 652.36	32.8~437.7	59.7~117.3	0.02~30.19
石炭系	3 308.6~7 979.5	8 796.12	50.0	76.6~174.4	0.05~32.80

热储	岩石资源量	流体资源量	地热资源量
新近系+第四系	3.94	1.88	5.82
古近系	10.75	3.73	14.48
白垩系	35.50	19.58	55.08
侏罗系	30.84	9.25	40.09
三叠系	35.58	6.06	41.64
二叠系	115.72	16.89	132.61
石炭系	106.67	14.85	121.52
合计	339.00	72.24	411.24