摘要
通过研究徐家围子地区深层火山岩气藏3个主要成藏要素——沙河子组气源岩、火山岩圈闭和断裂输导通道的时空匹配关系,得到该区火山岩圈闭与沙河子组气源岩在空间上可以直接接触,也可以在空间上相距一定距离,但均由断裂沟通连接.沙河子组气源岩、火山岩圈闭和断裂输导通道在泉头组沉积末期-青山口组沉积中期、嫩江组沉积末期和明水组沉积末期三者时间匹配关系最好,有利于天然气在火山岩中大规模富集成藏.通过3个主要成藏要素时空分布与火山岩气藏分布之间关系研究得到,沙河子组气源岩区、Ⅰ、Ⅱ类火山岩储集圈闭和断裂分布在空间上共同控制着火山岩气藏的形成与分布.泉头组沉积末期-青山口组沉积末期、嫩江组沉积末期和明水组沉积末期应是该区火山岩气藏形成的主要时期,3个主要成藏要素良好的时空匹配关系是造成该区深层火山岩中能形成大、中型气田的根本原因.
Gas source rock of K1 sh, traps of volcanic rock and transport pathway of fault are three main factors that influence Xujianweizi gas reservoirs in volcanic rock. By studying the time and space matching relation of the three factors, we find that traps of volcanic rock can directly contact gas source rock of K1sh, or a distance can exist between gas source rock of K1sh and traps of volcanic rock, however, traps of volcano rock are all connected with gas source rock of K1sh by faults. The time matching relation among gas source rock of K1sh, traps of volcanic rock and faults is the best from the end of K1q to the middle of K1qn, the end of K1n and the end of K2m. It is favorable for gas to accumulate in a large scale. According to the study of relation between time and space distribution of gas reservoirs of volcanic rock, gas source rock area of K1sh, traps of best and better volcanic rock and the distribution of faults spacely controlled the distribution and formation of gas reservoirs of volcano rock. The end of K1q to the middle of K1qn, the end of K1n and the end of K2m are main accumulation periods of gas reservoirs of volcano rock in Xujiaweizi region. The good matching relation among three accumulation essential factors is the basic cause for the formation of large and medium gas fields in volcanic rock.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2008年第3期342-348,共7页
Earth Science-Journal of China University of Geosciences
基金
国家重大基础研究"973"(No.2001CB209104)
博士学科点专项科研基金(No.20060220002)
关键词
徐家围子地区
火山岩
成藏要素
匹配关系
圈闭
断裂
源岩
Xujianweizi region
volcanic rock
accumulation essential
matching relation
traps
fault
source rock.
