物探化探计算技术2025，Vol.47Issue(5)：695-706,12.DOI:10.12474/wthtjs.20240624-0001
时频电磁法在喀什凹陷北缘深部地质结构以及油气探测中的应用
The application of the time-frequency electromagnetic method in the exploration of deep geological structures and oil and gas detection at the northern margin of the Kashgar Depression
摘要
Abstract
The northern margin of the Kashgar Depression is located at the intersection of the South Tianshan Orogenic Belt and the West Kunlun Orogenic Belt.It features complex structural deformation and abundant oil and gas resources,making it a hot spot for oil and gas research and exploration in China.Being at the conjunction zone of the Tarim Basin and the Pamir Plateau,the tectonic activity is highly intense,with complex stratigraphic deformation.The main controlling factors of structural deformation are unclear,leading to multiple interpretations and difficulties in geological modeling.This paper,combined with logging data,conducted constrained inversion of the time-frequency electromagnetic data from the northern margin of the Kashgar Depression,obtaining the deep electrical structure of the study area.The research results show that under the dual influence of the South Tianshan and West Kunlun orogenic belts,the Wupueral segment exhibits intense compressional structures,with the development of long-distance thrust nappe structures,forming a thrust fault structure in opposition to the South Tianshan thrust belt.Faults parallel to the West Kunlun and South Tianshan orogenic belts are visible.There is a sedimentary center in front of the West Kunlun Mountains for the Mesozoic,with the Mesozoic strata thinning to pinch out from the front of the West Kunlun and South Tianshan Mountains to the Kashgar Depression.Due to the thrust nappe effect,the basement is relatively shallow in front of the South Tianshan and Kunlun Mountains,gradually deepening towards the interior of the Kashgar Depression.Based on the resistivity inversion results and comprehensive geological interpretation,a structural map of the Mesozoic top surface at the northern margin of the Kashgar Depression was drawn.By combining the polarization inversion results,favorable oil and gas areas were delineated in the eastern segment of the Wupueral structural belt.关键词
时频电磁法/深部地质结构/喀什凹陷北缘/油气有利区Key words
time-frequency electromagnetic method/deep geological structure/northern margin of the Kashgar depression/oil and gas favorable areas分类
天文与地球科学引用本文复制引用
袁崑铭,魏巍,葛大壮,罗杭,姚孟远,高永才..时频电磁法在喀什凹陷北缘深部地质结构以及油气探测中的应用[J].物探化探计算技术,2025,47(5):695-706,12.基金项目
国家自然科学基金重点项目(42230311) （42230311）
