Heat flow, heat production, thermal structure and its tectonic implication of the southern Tan-Lu Fault Zone, East–Central China

Wang, Yibo; Hu, Shanshan; Wang, Zhuting; Jiang, Guangzheng; Hu, Di; Zhang, Kesong; Gao, Peng; Hu, J. F.; Zhang, Tao

doi:10.1016/j.geothermics.2019.06.007

Cited by 15 publications

(11 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When V is positive, the groundwater flows downward to the crust, indicating that the surrounding rock geothermal values become lower under the influence of cold-water flows, and the curve of the temperature is a concave shape (line c). 45,46 In this paper, the relationship between temperature and burial depth of a testing temperature well PD-099 was analyzed, and the results are consistent with the characteristic curve of c. The relationship shows that the geothermal field is mainly controlled by low-temperature groundwater movements. The curvature of curve c is the greatest at burial depths from 1050 to 1100 m, indicating that the velocity of groundwater flow at this depth is relatively large.…”

Section: Methods and Theoriessupporting

confidence: 63%

Geothermal Distribution Characteristics in the Qinshui Basin and Its Significance to the Production of Coalbed Methane

Meng

2021

ACS Omega

View full text Add to dashboard Cite

Temperature significantly affects the storage and transport of coalbed methane (CBM). Studies of geothermal distribution characteristics are important for the exploration and exploitation of CBM. In this study, more than 150 heat flow temperature data from coalbed methane wells in the Qinshui Basin were analyzed to investigate the geothermal distribution and its controlling factors. The results show that the geothermal gradient of the no. 3 coal seam ranges from 0 to 3.7 °C/hm with an average of 1.6 °C/hm, and the terrestrial heat flow of the no. 3 coal reservoir ranges from 0.9 to 94.6 mW/m2 with an average of 41.5 mW/m2. The reservoir temperature shows high values in the central and northwest parts of the basin, while the east and west edges of the basin show negative geothermal anomalies. It is found that groundwater has significant effects on the geothermal distribution in the Qinshui Basin, and with the increase of the groundwater level, the geothermal gradient decreases linearly. In addition, the geothermal gradient and terrestrial heat flow first increase and then tend to be stable with the increase in value of the total dissolved substances. Besides, with an increase in floor elevation, the geothermal gradient first increases linearly and then decreases linearly, obtaining a maximum value at about 450 m (transition floor elevation). This phenomenon is the result of the balance between heat supplying and heat losing. The geothermal distribution characteristics in the Qinshui Basin determine the reservoir temperature of the coalbed methane, and in turn, the reservoir temperature affects the adsorption, desorption, and diffusion behaviors of coalbed methane in situ.

show abstract

Section: Methods and Theoriessupporting

confidence: 63%

Geothermal Distribution Characteristics in the Qinshui Basin and Its Significance to the Production of Coalbed Methane

Meng

2021

ACS Omega

View full text Add to dashboard Cite

show abstract

“…The TC of rocks can be influenced by other factors such as pressure, temperature, porosity, and fluid saturation [8]. According to the laboratory experiments, 2000 m buried depth can cause only a less than 2% increase in TC, which is within the analytical error of the laboratory testing [9,10], so the pressure has no significant influence on TC in the study area. Therefore, pressure correction was not considered in this paper.…”

Section: Thermal Conductivity Estimationmentioning

confidence: 90%

Thermal Conductivity Estimation Based on Well Logging

Jiang

Wang

et al. 2021

Mathematics

Self Cite

View full text Add to dashboard Cite

The thermal conductivity of a stratum is a key factor to study the deep temperature distribution and the thermal structure of the basin. A huge expense of core sampling from boreholes, especially in offshore areas, makes it expensive to directly test stratum samples. Therefore, the use of well logging (the gamma-ray, the neutron porosity, and the temperature) to estimate the thermal conductivity of the samples obtained from boreholes could be a good alternative. In this study, we measured the thermal conductivity of 72 samples obtained from an offshore area as references. When the stratum is considered to be a shale–sand–fluid model, the thermal conductivity can be calculated based on the mixing models (the geometric mean and the square root mean). The contents of the shale and the sand were derived from the natural gamma-ray logs, and the content of the fluid (porosity) was derived from the neutron porosity logs. The temperature corrections of the thermal conductivity were performed for the solid component and the fluid component separately. By comparing with the measured data, the thermal conductivity predicted based on the square root model showed good consistency. This technique is low-cost and has great potential to be used as an application method to obtain the thermal conductivity for geothermal research.

show abstract

“…Generally, the crust is divided into four layers: a sedimentary layer, and the upper, middle, and lower crustal layers. The bottom of the lithosphere, that is, the contact surface between the lower crust and the mantle, is the Moho boundary (Wang et al, 2015).…”

Section: Lithospheric Thermal Structurementioning

confidence: 99%

A high geothermal setting in the Linyi geothermal field: Evidence from the lithospheric thermal structure

Liao,

Zhang,

Rong

et al. 2023

Energy Exploration & Exploitation

View full text Add to dashboard Cite

The lithospheric thermal structure has a profound indicative significance for the potential evaluation and exploration of geothermal resources. The Linyi geothermal field, located in the southern section of the Yishu fault in Shandong Province, boasts abundant geothermal resources. However, its origin is still unclear. This study analyzed the characteristics of terrestrial heat flow using the temperature logging of geothermal wells and measurements of thermal conductivity and heat production. Combined with the geophysical information of the Xiangshui (Jiangsu Province)-Mandula (Nei Mongol) geoscience transect and the lithology revealed by the geothermal wells, this study built a conceptual model of the lithospheric thermal structure using the one-dimensional steady-state heat conduction equation. Based on this model, the heat flow is 64.9 mW/m2, indicating a high geothermal setting in the study area. Furthermore, the ratio of crustal to mantle heat flow is < 1 (0.67), implying that surface heat flow originates predominantly from the mantle. The Yishu fault probably acts as a pathway for heat transfer from the mantle. The temperature of the Moho boundary in the study area was estimated to be 614.8 °C. The Curie depth was calculated to be 29.5 km (585 °C), which is consistent with the depth estimated using the aeromagnetic data. In sum, the Linyi geothermal field has a high geothermal setting, which contributes to the formation of geothermal resources.

show abstract

Heat flow, heat production, thermal structure and its tectonic implication of the southern Tan-Lu Fault Zone, East–Central China

Cited by 15 publications

References 53 publications

Geothermal Distribution Characteristics in the Qinshui Basin and Its Significance to the Production of Coalbed Methane

Geothermal Distribution Characteristics in the Qinshui Basin and Its Significance to the Production of Coalbed Methane

Thermal Conductivity Estimation Based on Well Logging

A high geothermal setting in the Linyi geothermal field: Evidence from the lithospheric thermal structure

Contact Info

Product

Resources

About