PENG Tao,
WU Ji-Wen,
REN Zi-Qiang et al
.2015.Distribution of terrestrial heat flow and structural control in Huainan-Huaibei Coalfield.Chinese Journal Of Geophysics,58(7): 2391-2401,doi: 10.6038/cjg20150716
1. College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China; 2. School of Earth and Environment, Anhui University of Science and Technology, Huainan Anhui 232001, China
Abstract:The terrestrial heat flow value is an important parameter to characterize the geothermal field in a region precisely. For the Huainan-Huaibei coalfield, the data of geothermal distribution, thermo-physical tests of rock and the distribution of terrestrial heat flow remain very little. To solve this problem, we use reliable well-logging data of temperature to delineate the distribution characteristics of terrestrial heat flow and analyze the influence of geological structure on current distribution of heat flow in this area.The determination of heat flow values depends on reliable well-logging data and test results of thermal conductivity of rock. Data from 159 boreholes for measuring temperature in steady state with long quiescent time in 59 coal mines or exploitation areas have been used to compute the geothermal gradients. The thermal conductivity values of 127 rock samples were measured, which were collected from 12 boreholes of 6 coal mines. Data of terrestrial heat flow at 37 sites of steady state for approximate temperature testing and 22 sites for simple temperature testing have been acquired and the distribution map of terrestrial heat flow of the Huainan-Huaibei coalfield has been prepared.The results show that the minimum terrestrial heat flow is 29.7 mW·m-2, and the maximum is 83.9 mW·m-2,mostly between 50 mW·m-2 and 70 mW·m-2, with average 58.3 mW·m-2. On the whole, the terrestrial heat flow value of Huainan coalfield is higher than that in Huaibei coalfield. The abnormal area of high values in the Huainan coalfield is large. The values in the mid-east area are the highest, while those in the west are the secondary, and the southeast is the lowest. The heat flow values in the south and west are high while that in the east is low in the Huaibei coalfield. The distribution characteristics of current terrestrial heat flow in Huainan-Huaibei coalfield are mainly controlled by evolution of tectonics of the North China plate and regional geological background. The big differences of heat flow value between Huainan and Huaibei coalfields are the result of the influence of the distance to the plate boundary and the late crust uplift. The asymmetry of heat flow in the study area is mainly resulted from the influence of geological structure on the geothermal field, and the core of the anticline and deep and large extensive faults are usually the areas with high heat flow values, while the upper walls of the Fufeng and Xusu nappes have low heat flow values.
Cui J P, Ren Z L, Su Y, et al. 2007. Relationship between present geotemperature and hydrocarbon generation in Haila'er Basin. Petroleum Exploration and Development (in Chinese), 34(4): 445-450. Gong Y L, Wang L S, Liu S W, et al. 2004. Distribution characteristics of terrestrial heat flow density in Jiyang depression of Shengli Oilfield, East China. Science China earth Sciences, 47(9): 804-812. Guo P Y. 2009. Characteristics of Geothermal field of deep mine and its heat damage Control in Chinese. Beijing: China University of Mining and Technology. He Z G, Liu C Y, Zhao J F, et al. 2009. A study on geothermal field and its geological significance in southern area of the North China Craton. Geological Review (in Chinese), 55(3): 428-433. Hu S B, He L J, Wang J Y. 2000. Heat flow in the continental area of China: A new data set. Earth and Planetary Science Letters, 179(2): 407-419. Hu S B, He L J, Wang J Y. 2001. Compilation of heat flow data in the China continental area (3rd edition). Chinese J. Geophys. (in Chinese), 44(5): 611-626, doi: 10.3321/j.issn:0001-5733.2001.05.005. Ju Y W, Wang G L. 2002. Tectonic characteristics and evolution of the Sulin mine area in the Huaibei coalfield. Journal of Liaoning Technical University (Natural Science Edition) (in Chinese), 21(3): 286-289. Ju Y W, Jiang B, Hou Q L, et al. 2005. 13C NMR spectra of tectonic coals and the effects of stress on structural components. Science in China (Series D), 48(9): 1418-1437. Ju Y W, Wei M M, Xue C D. 2011. Control of basin-mountain evolution on the occurrence of deep coal and coal bed methane in North China. Journal of China University of Mining & Technology (in Chinese), 40(3): 390-398. Li H Y, Zhu Y W, Yi J C. 2009. Ground temperature change law and abnormal factors analysis of Huainan Mining Area. Safety in Coal Mines (in Chinese), (11): 68-71. Li Z X. 1994. Collision between the North and South China blocks: a crustal-detachment model for suturing in the region east of the Tanlu fault. Geology, 22(8): 739-742. Luo Y, Ju Y W, Tan J Q. 2011. Characteristics of present geothermal field and prediction of its thermal damage in Suntuan-Zhaoji exploration area. Journal of Graduate University of Chinese Academy of Sciences (in Chinese), 28(6): 734-739. Sun Z X, Zhang W, Hu B Q, et al. 2006. Features of heat flow and the geothermal field of the Qinshui Basin. Chinese J. Geophys. (in Chinese), 49(1): 130-134, doi: 10.3321/j.issn:0001-5733.2006.01.018. Rao S, Hu S B, Zhu C Q, et al. 2013. The characteristics of heat flow and lithospheric thermal structure in Junggar Basin, northwest China. Chinese J. Geophys. (in Chinese), 56(8): 2760-2770, doi: 10.6038/cjg20130824. Ren Z L. 2000. Comparison of thermal evolution history in sedimentary basins, north China. Oil & Gas Geology (in Chinese), 21(1): 33-37. Tan J Q, Ju Y W, Hou Q L, et al. 2009a. Distribution characteristics and influence factors of present geo-temperature field in Su-Lin mine area, Huaibei coalfield. Chinese J. Geophys. (in Chinese), 52(3): 732-739. Tan J Q, Ju Y W, Zhang W Y, et al. 2009b. Structure controls on present geothemal field in Sulin mine area of Huaibei. Journal of China Coal Society (in Chinese), 34(4): 449-454. Tan J Q, Ju Y W, Zhang W Y, et al. 2010. Heat flow and its coalbed gas effects in the central-south area of the Huaibei coalfield, eastern China. Science China Earth Sciences, 53(5): 672-682. Wang G L, Cao D Y, Jiang B, et al. 1992. The Thrust Nappe, Extensionalgliding Nappe and Gravity Gliding Structure in the South of Northern China (in Chinese). Xuzhou: China University of Mining and Technology Press, 5-14. Wang L S, Li C, Shi Y S, et al. 1995. Distributions of Geotemperature and terrestrial heat flow density in lower Yangtze area. Acta Geophysica Sinica (in Chinese), 38(4): 469-476. Wang L S, Li C, Liu F T, et al. 2000. The lithospheric heat flow variable structure of two types of basins in Chinese's east and west. Scientia Sinica Terrae (in Chinese), 30(S1): 116-121. Wang W G, Xu G Q, Li P Q. 2010. Temperature variation and prediction of deep thermal injury in Dingji mining Area. Safety in Coal Mines (in Chinese), (6): 103-105. Wemicke B. 1981. Low angle normal faults in the basin and range province: napple tectonics in an extending orogeny. Nature, 291(5817): 645-648. Wu Y D, Ju Y W, Hou Q L, et al. 2009. The control of tectonic-thermal evolution to CBM's generation of the Sulin Mine Area in the Huaibei Coalfield. Progress in Natural Science (in Chinese), 19(10): 1134-1141. Xie D N, He M X, Zhou L F, et al. 2006. Characteristics of overthrust structures on northern edge of east Qinling-Dabie orogenic belt and hydrocarbon potentials. Oil & Gas Geology (in Chinese), 27(1): 48-55. Yang D D, Wang B S, Zhang X, et al. 2012. Ground temperature distribution and heat damage prevention of Huainan coal field. China Mining Magazine (in Chinese), 21(7): 94-97. Ye Z R, Hager B H. 2001. Generation and distribution of global heat flow. Chinese J. Geophys. (in Chinese), 44(2): 171-178, doi: 10.3321/j.issn:0001-5733.2001.02.004. Zhang H, Zheng Y Z, Zheng G S, et al. 2003. Extensional structure under the Fufeng-nappe in Huainan Coalfield, Anhui Province, and its formative mechanism. Coal Geology & Exploration (in Chinese), 31(3): 1-4. Zhou Q H, Feng Z H, Men G T. 2008. The study on present geothermal features and the relation with natural gas's generation of Xujiaweizi Fault Depression in the North of Songliao Basin. Science in China Series D: Earth Sciences (in Chinese), 37(S2): 177-188.