重磁建场法在三塘湖盆地火成岩勘探中的应用

Application of Gravity and Magnetic Field Building Method to Igneous Rock Exploration in Santanghn Basin

二叠系和石炭系的火山岩是三塘湖盆地重要的含油气层系,分布广泛,由于埋藏深以及侏罗系煤层和条湖组火山岩对深层地层的屏蔽作用,造成地震资料品质差,地震勘探也不能满足研究工作的需要。针对该区存在的勘探难点,提出采用高精度重磁、建场法以及重磁电震联合勘探来解决该区存在的勘探难题,通过重磁建场勘探,对盆地基底断裂、结构有了新的认识,重新划分了火成岩的分布范围,通过钻探证实,吻合性较好,取得了较好的地质效果。

The Permian and Carboniferous igneous rocks are the major petroliferous formations in the Santanghu Basin. They are widely distributed in the basin. Due to their deep burial and the shielding effect of the Jurassic coal beds and the igneous rocks of Tiaohu Formation on deep formations,the quality of seismic data is poor in the basin. Also the seismic exploration cannot meet the requirement of the studied work. The high-accuracy gravity and magnetic field building method and the gravity-magnetic-electronic-s...