摘要
通过对深层天然气形成的地质条件研究认为，北部深层发育多个断陷，主要断陷期为沙河子期，主要烃源岩为沙河子组湖相烃源岩，厚度大，分布范同广；发育多种类型储集层，主要为营城组火山岩储层，以近火山口爆发相和溢流相流纹岩物性最好；在登娄库组二段与泉头组一、二段区域盖层控制下发育3套生储盖组合，以下部组合为主；深层发育5种天然气成藏模式，五大因素控制了天然气的形成与分布。在此基础上，指出下一步勘探方向为坚持立足徐家围子断陷、加大预探双城和古龙断陷、积极准备林甸断陷，并指出了有利的勘探区带。
Through the research on geologic condition, it is considered that, multi fault depressions are developed in deep zones in the north, the main faulting period is Shahezi stage, and the main source rock is lacustrine source rock in Shahezi Formation with big thickness and wide distribution. Multi reservoir types are developed and the main reservoir is the volcanic reservoir of Yingcheng Formation, with the best reservoir properties occurring in explosive and effusive rhyolite nearby the volcanic crater. Three types of source-reservoir-caprock assemblages are developed under the control of caprock in Member Ⅱ of Denglouku Formation and Member Ⅰ and Member Ⅱ of Quantou Formation, with the lower part being dominant. Five gas genetic patterns are developed in deep zone, with the gas generation and distribution controlled by five factors. Based on the above, it is pointed out that the next step of gas exploration is to target on Xujiaweizi fault depression, increase the efforts on preliminary prospecting in Shuangcheng and Gulong fault depressions, and actively prepare for the exploration in Lindian fault depression. Favorable exploration areas are presented.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2009年第5期28-32,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
松辽盆地北部
深层
天然气
烃源岩
火山岩储层
the north of Songliao Basin
deep zone
natural gas
hydrocarbon source rock
volcanic reservoir
