临清地热勘查中的大地电场岩性测与测井曲线对比研究

在临清市几个地热勘查项目工作中应用了大地电场岩性测深技术,主要用于了解深部热储层的含水情况,选定地热井井位,取得了较为理想的结果。通过与测井及钻井结果对比,说明该方法能够较为准确地反映地层含水层段的深度、厚度等情况,为井位选取提供可靠的依据。在0~1140m的第四系、新近系明化镇组及1720m以深的古近系东营组含水层多与大地电场岩性测深的0值及低正值( 0.5~ 1.0)相对应;在1140~1720m的新近系馆陶组含水层多与其0值、负值相对应。因大地电场岩性测深曲线是地下多种因素的综合反映,有时也会得出不准确的结论。尽管如此,对于地热勘查,该方法仍是很有价值的。今后应考虑扩大该技术在地热勘查中的应用范围和应用方式,如用于调查区域内的热储层顶底板埋深情况、热储层厚度、断裂构造的位置及产状等。

Contrast Study between the Method of Telluric Electricity Field and Logging Curve in Lithology Sounding

Lithology sounding technology of telluric electricity field is applied in geothermal exploration in Linqing city. It is used to know water-bearing condition in deep reservoir and fix geothermal well level, which have gained good result. Through results contrast between logging and drilling, it is regarded that this method can reflect depth and width of water-bearing layers, which can provide reliable basis for selecting well location. This technology can be used to survey depth and width of reservoir, fault structure location and occurrence regionally.