大地电磁测深在油气勘探中的应用——以民和盆地为例

APPLICATION OF MAGNETOTELLURIC SOUNDING TO OIL AND GAS EXPLORATION:TAKE THE MINGHE BASIN AS AN EXAMPLE

结合区域地质资料和地球物理特征,对民和盆地的大地电磁测深资料进行了处理和解释。根据大地电磁测深的解释结果,确定了主要目的层系的分布,推断了主要目的层系的沉积和沉降中心,重新划分了民和盆地的构造单元,认为该盆地是一个多沉积、沉降和生油气中心的盆地,其中周家台低隆起及其两侧是油气聚集的有利区带。该盆地的勘探实践证明,大地电磁测深是一种快速、高效、经济的油气普查手段。

Combining with regional geologic data and geophysical characteristics, the data of magnetotelluric sounding in the Minhe Basin are processed and interpreted. According to the interpretation results, the distribution of the primary layers is determined; the center of sedimentation and settlement of the primary layers is concluded and the structure elements of the basin are newly divided. It is thought that the Minhe Basin is a basin with many deposits and settlements, being the centre of oil & gas gathering, and low uplift zone of Zhoujiatai and its lateral layers are the favorable zones for oil and gas to be gathered.