马头营区干热岩地热资源赋存分布特征及开发利用前景

摘要

对大地热流值、莫霍面埋深、航磁、重力异常、岩浆岩体分布特征进行了研究,表明唐山市乐亭县马头营区具有良好的干热岩赋存背景.相关测温资料表明,该区地温梯度最高达7℃/hm,初步计算,3.5 km处地温达到175℃,在此基础上,对3.0～3.5 km的干热岩资源量进行预测,估算系数按30％算,结果显示,马头营区于热岩资源总计5.00×1019 J,折合标准煤17.1亿t.随后,对其成因模式进行论述,提出了该区干热岩资源的科学开发利用方案.%In this paper,heat flow values,the Moho depth,aeromagnetic,gravity anomaly,and magmatic rock mass distribution in Matouying in Laoting County of Tangshan City was analysed,and it was shown that there exist abundant hot-dry-rock storage in this region.Relative temperature measurement data shows that,the geothermal gradient is up to 7 ℃/hm,and the temperature is expected to reach 175 ℃ at 3.5 km,eventually the hot-dry-rock resource amount at the depth of 3.0 ～3.5 km in Matouying area was estimated,with the estimated coefficient is 30％.The results show that the resource amount at the depth of 3.0 ～ 3.5 km could reach 5.00 × 1019J,which is equivalent to the heat of 1.71 billion tons of standard coal.Finally,it summarized the formation models and put forwards the scientific development and utilization plan of the hot dry rock.