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石炭系是三塘湖盆地丰富的含油气层系,火山岩是有利的油气储集体,但由于在深层难以得到有效的地震反射信息,长期以来对石炭系的内幕结构及火山岩分布认识不清,制约了油气勘探进程。高精度重磁和建场测深综合物探技术的应用,基本搞清了马朗凹陷石炭系残留洼槽的分布、层系结构及其火山岩的纵、横向分布特征,弥补了地震勘探的不足。研究指出,围绕东南部石炭系残留洼槽是有利的油气勘探方向,上石炭统哈尔加乌组低阻层是泥质碎屑岩发育的烃源层,卡拉岗组和巴塔玛依内山组高阻层是火山岩发育的有利储集层。建场测深剖面纵向上能够识别石炭系多套层系及其中分布的火山岩体,高精度重磁则从平面上研究火山岩等地质体的分布特征,二者结合是研究石炭系地质结构与火山岩的有效手段。
Carboniferous is a rich petroleum system in the Santanghu Basin. Volcanic rocks are favorable reservoirs for oil and gas. However, since it is difficult to obtain effective seismic reflection information in deep layers, the understanding of the inside structure and distribution of volcanic rocks has long been unclear, Oil and gas exploration process. The application of high-precision gravity and magnetic field and deep-sea sounding integrated geophysical prospecting technology basically found out the distribution and stratigraphic structure and the vertical and horizontal distribution of residual carboniferous reservoirs in the Malang sag, and made up for the lack of seismic exploration. The research indicates that the hydrocarbon reservoirs around the southeast Carboniferous are favorable oil and gas exploration directions. The lower resistivity layer of the Upper Carboniferous Halgawo Formation is the source layer of muddy clastic rocks. The Karakang Formation and the Batamayi Une Mountains The high resistivity layer is a favorable reservoir for volcanic rock development. The deep-seated profile of the site can identify multiple sets of Carboniferous series and the volcanic bodies distributed in them vertically. The high-precision gravity and magnetism study the distribution characteristics of volcanic rocks and other geological bodies from the plane. The combination of the two is to study the relationship between the Carboniferous geological structure and volcanic rocks Effective means.