Abstract: On the basis of geothermal data from 133 wells in the Dongying depression collected, systematized and analyzed, the regional geothermal gradient is determined as 3.6℃/100m. The fundamental features of its geothermal field are discussed in the paper. It is pointed out that the variation of geothermal gradient can basically be divided into four vertical sections. They are mainly caused by the difference of thermal conductivity of rocks. The distribution of geothermal anomalies is obviously controlleed by regional tectonics and large faults, and is closely related to the relief of basement. Based upon the terminal threshold temperature of oil generation, a prediction of the lower limit of depth of oil distribution is made. It is believed that the dep-ression may hold great potiential for oil and gas exploration at depth.

摘要： 本文收集、整理和分析了东营凹陷133口井的地温资料,由此确定的区域地温梯度值为3.6℃/100米。文中论述了东营凹陷地温场的基本特征。指出地温梯度的变化在纵向上大致可划分为四段,这主要是由于岩石热导率的差异而造成的;地温异常在平面上的分布明显地受到区域构造和大断层的控制,并与基底起伏密切相关。文中根据本区生油终止门限温度对石油分布的下限深度进行了预测,认为本区深部尚有相当大的油气潜量可供勘探。