MT勘探对复杂区隐伏构造的识别

MT勘探技术特点主要表现为勘探深度大、对高电阻率高速地层穿透能力强、对地层可进行纵向电性分层,适于追踪推覆体下盘沉积层的分布及隐伏构造异常的分布研究。自该方法引入油气勘探以来,在配合地震研究盆山接触关系、发现山前隐伏构造异常等方面发挥了独特作用,已引起油气勘探工作者的关注。结合模型模拟分析和MT方法在山前复杂区的实际应用,展示了MT方法在发现深部构造异常方面的作用,指出在复杂区油气勘探中,MT方法可作为地震勘探的有效补充并发挥重要作用。

Identification of Piedmont Buried Structure with MT Method

The main features of MT method are deep detection,sensitive to layers with high resistivity and high velocity,helpful for geologically stratification in vertical direction,so it can be used in determining distribution of nappe lower wall sediment and buried structures abnormality.Together with seismic data,MT method has being played a unique role in detecting piedmont buried structures and in studying contact relations among basins and mountains since it was introduced into hydrocarbon exploration sphere,which has attracted much attention of oil and gas exploration workers.Here model simulation analysis and MT method are applied in geologically complicated piedmont areas,which proves MT method is an effective supplementary measure in hydrocarbon exploration in complicated areas.