CAJ | 학술논문

下古生界碎屑岩成藏组合是阿曼盆地最重要的天然气成藏组合，寒武系—志留系Haima群储层及上覆泥岩层构成了基本的储盖组合，Huqf群烃源岩为最主要的供烃源岩。在系统解剖油气成藏要素的基础上，探讨了不同次盆油气成藏作用与过程，并分析了其勘探潜力与风险。在Ghaba次盆主体部位，Huqf群烃源岩现今以生气为主，深埋升温裂解而成的焦沥青多充填了早期圈闭孔隙空间，应关注白垩纪之后形成的新圈闭；受中央古隆起阻隔，Ghaba次盆东翼圈闭充注有效性差。南阿曼次盆中部，厚层Ara盐岩阻隔油气垂向运移至浅层Haima群中，圈闭有效性偏差。南阿曼次盆东翼，Ara盐层被持续溶解后，释放出盐内和盐下圈闭中先期聚集的原油，可重新聚集成藏，原油勘探的风险较小。
하고생계쇄설암성장조합시아만분지최중요적천연기성장조합，한무계—지류계Haima군저층급상복니암층구성료기본적저개조합，Huqf군경원암위최주요적공경원암。재계통해부유기성장요소적기출상，탐토료불동차분유기성장작용여과정，병분석료기감탐잠력여풍험。재Ghaba차분주체부위，Huqf군경원암현금이생기위주，심매승온렬해이성적초력청다충전료조기권폐공극공간，응관주백성기지후형성적신권폐；수중앙고륭기조격，Ghaba차분동익권폐충주유효성차。남아만차분중부，후층Ara염암조격유기수향운이지천층Haima군중，권폐유효성편차。남아만차분동익，Ara염층피지속용해후，석방출염내화염하권폐중선기취집적원유，가중신취집성장，원유감탐적풍험교소。
The lower Paleozoic clastic play is the most important gas play in Oman Basin,the sandstone reservoirs of Cambrian-Silurian Haima Group and its overlying thick mudstone being the basic reservoir-caprock combination,Huqf Group is the most important source rock. This paper analyzes the petroleum geological conditions,hydrocarbon accumulation models,exploration potential and risks. In the center of Ghaba sub Basin,Huqf source rock only generates gas today. The pores of early traps were mostly filled with the pyrobitumens formed by high formation temperatures. Attention should be paid to the traps formed after Cretaceous in exploration. The central palo-uplift of Ghaba Basin was a barrier for lateral migration,so the traps in east flank have risk of hydrocarbon charge. In the center of south Oman Sub Basin,it′s difficult for hydrocarbon to migrate vertically through the thick Ara salt to the upper Haima Group,so most of the traps lack potential. In the east flank of south Oman Basin, for the continued dissolution of Ara salt,which destroyed the seal of former oil pools,the oil released from them could recharge new traps of Haima Group,so there are chances for oil exploration.