摘要
通过对乌尔逊凹陷南二段油气成藏各种条件与油气藏的叠合研究证明,乌尔逊凹陷南二段油气成藏与分布的主控因素主要有盖源时空匹配关系、储层岩性、断层和圈闭。盖源时空匹配关系控制着油气聚集数量和空间分布;粉砂岩和泥质粉砂岩是油气储集的有利岩性;断裂活动时期与源岩大量排烃期的匹配关系控制着油气聚集数量,较好的断层垂向封闭性有利于油气聚集,断裂活动和封闭控制着不同类型圈闭的形成。反向高断块和断背斜有利于油气运聚成藏。在此基础上得到乌尔逊凹陷南二段油气成藏与分布的有利勘探区主要分布在苏仁诺尔构造带和黄旗庙构造带南部;较有利区主要分布在铜钵庙构造带、乌东斜坡带、乌西断裂带、乌中构造带和巴彦塔拉构造带的部分地区。
Based on the researches of oil or gas accumulation conditions and traps and oil or gas reservoirs of K_1n_2, time and space configuration relationships between sourcerock and caprock, lithology of reseroir, faults and traps are considered to be the main factors for controlling oil or gas accumulation and distribution of K_1n_2 in Wuerxun depression. The time and space configuration relationships between sourcerock and caprock control oil or gas accumulation amount and distribution of K_1n_2. Siltstone and argillaceous siltstone are favorable lithology for oil or gas accumulation of K_1n_2. Configuration relationships between activity periods of faults and expulsion periods of sourcerock of K_1n_1 control oil or gas accumulation amount of K_1n_2. Good vertical seal of faults controls oil or gas accumulation of K_1n_2, activity and seal of faults control formation of traps in K_1n_2. Backward and high fault blocks and fault-anticlines are favorable traps for oil or gas accumulation of K_1n_2. Based on these works, Surennuoer structure zone and the south of Huangqimiao structure zone are the most favorable areas for oil or gas of K_1n_2 to accumulate. The parts of Tongbomiao structure, Wudong slope zone, Wuxi fault zone, Wuzhong structure zone and Bayantala structure zone are more favorable areas for oil or gas of K_1n_2 to accumulate in Wuerxun depression.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2004年第3期377-382,387,共7页
Journal of Jilin University：Earth Science Edition
基金
国家重点基础项目资助(2001CB209104)
关键词
鸟尔逊凹陷
油气藏
主控因素
有利区
Wuerxun depression
oil or gas reservoirs
main controlling factors
favorable area
