摘要 二连盆地是-个结晶基底覆盖薄的多隆、多凹地区,其白垩系地层与前白垩系地层之间为重力、电法勘探的主要物性界面。因此,在这里未全面开展地震勘探之前,完成了重力和电法的面积测量工作,充分显示了重力、电法资料在确定本区构造划分和推断基底岩性方面的作用。实测的电测深曲线在凹陷内多呈典型的 H 型曲线,在隆起上是 A 型。依据实测曲线尾支45°渐近线求取的 S 值,具有较高的精度。
Abstract:Erlian basin is the sedimentary basin where sedimentary cover overlying the crystalline basement is quite thin and where there are many uplifts and depressions.The interface between Cretaceous forma-tion and pre-Cretaceous forrnatiens is an important lithostratigraphic interface in gravimetric and electric surveys.Areal gravirnetric and electric surveys were finished before the starting of Large-scale seis-mic exploration, Gravirnetric and electric data played an important role in classifying the geological structures and in inferring the 1ithology of the basement.The field electric sounding curves obtained in depressions behave like typical H curve, but those obtained on uplifts behave Like typical A curve, The S values found from 45゜asymptote of tail segment of field electric sounding curve are quite accurate.
收稿日期: 1986-07-31
引用本文:
刘清泉. 重力、电法资料在二连盆地区域构造研究中的应用[J]. 石油地球物理勘探, 1987, 22(4): 421-426.
Liu Qingquan. The application of gravimetric and electric data to the research on areal geological structure in Erlian basin. OGP, 1987, 22(4): 421-426.