海洋地质与第四纪地质2026，Vol.46Issue(2)：52-63,12.DOI:10.16562/j.cnki.0256-1492.2025101401
马克兰增生楔变形前缘天然气输导体系组合类型及地质意义
Combination types and geological significance of natural gas transport system in the deformed front of the Makran accretionary prism
摘要
Abstract
The Makran accretionary prism,as the world's largest accretionary prism formed by low angle subduction of the Arabian Plate and the Eurasian Plate,contains abundant natural gas resources.Its deformation front is characterized by strong tectonic activity,with the development of thick sediments and complex structural combinations,such as imbricate thrust faults,small displacement normal faults,piggyback basins,gas chimneys,and décollement surface.These geological structures play an important role in the transportation and accumulation of natural gas.Based on seismic data and previous studies,we systematically categorized the natural gas migration systems of this region.Results indicate that natural gas is mainly transported through three types of transport systems:(1)deep transport systems in deformed zones:décollement and deep thrust faults act as primary vertical pathways,facilitating the upward transportation of deep fluids to shallow formations;(2)shallow lateral transport systems:after gas migrates along the thrust fault to the shallow part,it laterally migrates and accumulates in the high permeability turbidite sands in the piggyback basin,forming a natural gas reservoir under the stable domain of natural gas hydrates;(3)the transport system in the undeformed zone:it mainly consists of unconformities,small normal faults,and associated gas chimneys in hemipelagic sediments,which promote gas accumulation in shallow strata.This study revealed the complex natural gas transport network at the front edge of the Makran accretionary prism,and provided key geological evidence for the exploration and evaluation of potential and prospects of natural gas resources in the area.关键词
输导体系类型/天然气/逆冲断层/气烟囱/马克兰增生楔Key words
transport systems/natural gas/thrust fault/gas chimney/Makran accretionary prism分类
海洋科学引用本文复制引用
廖晶,任泽芳,梁杰,雷宝华,龚建明,王建强,杨传胜,解桐桐..马克兰增生楔变形前缘天然气输导体系组合类型及地质意义[J].海洋地质与第四纪地质,2026,46(2):52-63,12.基金项目
国家自然科学基金'马克兰增生楔低角度俯冲区断层"接力"过程及其对水合物成藏的控制'(42076069),"南海北部神狐海域深水水道演化与水合物成藏的关系"(41406080) （42076069）
亚洲合作基金项目"中国-巴基斯坦油气资源潜力评价与能力培训" （）
崂山实验室科技创新项目"中国海域重点盆地发育时空差异及其深部过程"(LSKJ202203401) （LSKJ202203401）
中国地质调查局项目(DD20190581、DD20160155) （DD20190581、DD20160155）
