牛驼镇凸起区干热岩地热资源赋存分布特征及开发利用前景

综合分析研究牛驼镇凸起区大地热流值的分布、莫霍面深度、重磁特征和相关测温资料后，发现牛驼镇凸起区赋存的干热岩地热资源具有开发利用的价值。另外，对以往钻孔测温资料的整理研究发现，牛驼镇凸起区新生界地温梯度值介于3～13 ℃/hm，地温异常区面积达617.86 km²，利用经验公式T（z）＝T₀＋q₀Z/K－AZ²/2K，预测在-4 000 m水平地温最高可达200 ℃，在此基础上，采用体积法资源量估算公式Q=ρ×C_ρ×V×（T-T₀），按30％的估算系数计算，标高在-3 500～-4 000 m可预获干热岩地热资源量（热能）0.99×10¹⁹ J，折合标准煤3.39亿t。并对牛驼镇凸起区干热岩资源的开发利用前景进行了评价和建议。

Occurrence conditions of hot-dry-rock geothermal resources and development prospects in Niutuozhen uplift area

Distribution of terrestrial heat flow，the moho depth，gravitational field characteristics，magnetic field characteristics and temperature measurement data were analyzed，and the conclusion shown that there existed abundant hot-dry-rock storage in this region.And then，through the study on the data of previous borehole temperature data，it was found that the geothermal gradient in the Cenozoic in Niutuozhen uplift is between 3～13 ℃/hm，and the abnormal region is about 617.86 km²，by using the formula T（z）＝T₀＋q₀Z/K－AZ²/2K，the predicted ground temperature can reach 200 ℃ at -4 000 m underground.Based on the above results，by using the formula Q=ρ×C_ρ×V×（T-T₀），according to the 30% calculation coefficient，the results showed that the resource amount at the elevation of -3 500～-4 000 m could reach 0.99×10¹⁹ J，which was equivalent to the heat of 0.339 billion tons of standard coal.In the end，the development and utilization of dry hot rock resources in Niutuozhen uplift were evaluated and recommended.