松辽盆地长岭断陷火山岩相与天然气成藏关系  

RELATIONSHIP BETWEEN VOLCANIC FACIES AND GAS ACCUMULATION IN THE CHANGLING FAULT-DEPRESSION OF THE SONGLIAO BASIN

作　　者：秦伟军[1] 刘超英 谈风其[2] 高中哲[3] 毛根塔[3] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [2]吉林大学地球探测科学与技术学院,长春130026 [3]中国石油天然气集团公司东方地球物理勘探有限责任公司研究院,河北涿州072750

出　　处：《石油实验地质》2008年第4期328-332,339,共6页Petroleum Geology & Experiment

基　　金：中国石油化工股份有限公司油气勘探先导项目(06-ZS-YTB012)

摘　　要：松辽盆地盖层由上部坳陷层和下部断陷层组成。长岭断陷是断陷层的一部分,是受盆地早期发育的孙吴—双辽、松花江—四平2条岩石圈深断裂带控制的深大断陷。断陷内部及周边断裂深切岩石圈,造成多期火山活动,形成火山岩与巨厚湖相沉积岩共生。火山岩以酸性火山岩类为主,分爆发相和溢流相2种类型,两者在剖面上交替出现构成多个火山活动旋回。研究认为,喷溢相的上部亚相原生气孔发育,爆发相的空落亚相和热基浪亚相孔洞发育。火山岩相与天然气成藏关系主要表现为,喷溢相上部亚相、爆发相空落亚相和热基浪亚相控制了好储层发育,好储层又控制了气藏形成。Caprock structure in the Songliao Basin is composed of the upper depression layers and the lower fault-depression layers. The Changling Fault-Depression （part of the fault-depression layers） is a deep-large fault-depression controlled by the Sunwu--Shuangliao and the Songhuajang--Siping Deep Fault Belts generated during basin early phase. Deep faults in and around the fault-depression cut deep into lithosphere, causing volcanic activities, resulting in association of volcanic rocks and lacustrine facies sedimentary rocks. Volcanic rocks are mainly acid, and can be divided into 2 types： explosive and outpouring. The 2 facies alternate and compose multiple volcanic activity cycles. Primary vesicles generate in the upper subfacies of the explosive facies. Pores and caverns generate in the aerial-falling and thermodynamic wave subfacies of the outpouring facies. Good reservoirs generate controlled by the upper subfacies of the explosive facies and the aerial-falling and thermodynamic wave subfacies of the outpouring facies; hence control gas accumulation formation.

关 键 词：火山岩相 天然气成藏 长岭断陷 松辽盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]