CAJ | 학술논문

松辽盆地大型火山岩气藏的发现,揭开了我国火山岩油气藏全面勘探的序幕.本文以油气钻探实践结果为基础,应用地质、地球物理和地球化学相结合的分析方法,探讨了松辽盆地大型火山岩气藏的成藏控制因素.结果表明,气源岩发育区控制气藏的宏观分布范围,气藏与源岩区的横向距离一般小于8km,源岩与火山岩厚度比大于2的区域对成藏尤为有利;大断裂控制火山岩体呈条带状或串珠状展布,延断裂带火山岩厚度大,最大厚度超过1600m;火山岩相和火山旋回控制储层发育状况,火山口或近火山口叠合相储层发育,储层厚度一般100～200m,有利储层常发育于火山旋回的顶部;火山机构中心部位具有局部构造高、储层物形较好、断裂发育等特点,在气源条件优越时,是短距离垂向运移成藏的最有利地区.
송료분지대형화산암기장적발현,게개료아국화산암유기장전면감탐적서막.본문이유기찬탐실천결과위기출,응용지질、지구물리화지구화학상결합적분석방법,탐토료송료분지대형화산암기장적성장공제인소.결과표명,기원암발육구공제기장적굉관분포범위,기장여원암구적횡향거리일반소우8km,원암여화산암후도비대우2적구역대성장우위유리;대단렬공제화산암체정조대상혹천주상전포,연단렬대화산암후도대,최대후도초과1600m;화산암상화화산선회공제저층발육상황,화산구혹근화산구첩합상저층발육,저층후도일반100～200m,유리저층상발육우화산선회적정부;화산궤구중심부위구유국부구조고、저층물형교호、단렬발육등특점,재기원조건우월시,시단거리수향운이성장적최유리지구.
The discovery of large volcanic rock gas fields in the Songliao basin has opened the complete exploration of volcanic gas pools in China. Based on practical results of the drilling exploration, the paper discusses the main factors controlling hydrocarbon accumulatirn in large volcanic gas fields in the northern Songliao basin by combination of geological, geophysical and geochemical evidence. The results show that the area of gas source rock controlling the macroscopic distribution boundary of gas pools, the horizontal distance between gas pool and gas source rock is generally less than 8km and, the area with ratio of gas source rock to volcanic rock thickness less than 2 is profitable for hydrocarbon accumulation. Large fault control the eruptive body distribution like banding or beads-shaped and volcanic rock is thicker along fault zone with a maximum thickness more than 1600m. Volcanic facies and volcanic cycle control the reservoir develop, reservoir development in crater or near crater overlap phase, the thickness of reservoir generally 100～200m. Profitable reservoir constantly develops in the top of volcanic, cycle. The center of volcanic apparatus present high local structure, good reservoir physical property, faulting development, when gas source is advantageous, it is a favorable area for hydrocarbon accumulation of short distance vertical migration.