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开封凹陷区有着丰富的地下热水资源。本文在搜集、实测井孔测温资料的基础上,研究分析了开封凹陷区地温场特征及其影响因素。研究表明,由于受基底构造控制,开封凹陷区地温分布存在差异,高地温分布区恰好位于基底构造较发育的开封县城和兰考县城附近,全区地温梯度在2.50~3.68℃/100m之间,平均值为3.09℃/100m,热储层埋深小于500m时地温梯度变幅随深度的增加而增大,大于500m时随深度的增加而减小。
Kaifeng depression area is rich in underground hot water resources. Based on the collection and measurement of borehole temperature data, this paper analyzes and analyzes the characteristics of geothermal field in Kaifeng depression and its influencing factors. The results show that the geothermal distribution in the depression area of Kaifeng differs due to the control of basement structure. The geothermal distribution area is located in the vicinity of Kaifeng county and Lankao county, where the basal structure is relatively developed. The geothermal gradient of the whole area is 2.50 ~ 3.68 ℃ / 100m, When the depth of thermal reservoir is less than 500m, the amplitude of geothermal gradient increases with the increase of depth, but decreases with the increase of depth when the depth is larger than 500m.