徐家围子地区(K_1sh+K_1yc)—K_1d_2含气系统研究与评价  

Research and evaluation for K_1sh+K_1yc—K_1d_2 gas system in Xujiaweizi region

作　　者：付广[1] 孟庆芬[1] 

机构地区：[1]大庆石油学院,黑龙江安达163318

出　　处：《特种油气藏》2005年第5期14-18,共5页Special Oil & Gas Reservoirs

摘　　要：对徐家围子地区(K1sh+K1yc)-K1d2含气系统天然气成藏条件描述,指出源岩、盖层、不整合面和古隆起是控制该含气系统天然气成藏与分布的主控因素,天然气成藏的主要时期为泉头组沉积末期;天然气成藏具有沿不整合面短距离运移基岩风化壳成藏、沿裂缝运移源岩区内火山岩成藏和沿砂体侧向运移地层超覆成藏3种模式。(K1sh+K1yc)—K1d2含气系统在徐家围子地区可划分为4个含气子系统:升平—汪家屯、昌德—肇州西和双城—呼兰为好含气子系统,朝长—肇东为较好含气子系统。(K1sh+K1yc)—K1d2含气系统自登三段沉积末期形成后在泉头组沉积末期-青山口组沉积时期、嫩江组沉积末期、明水组沉积末期和早第三纪末期由于T5(T4)至T3或T2断层活动开启上扩范围扩大,使得天然气成藏的空间范围增大,造成“同源多层”的天然气分布现象,同时使天然气成藏模式发生变化。By describing gas accumulation conditions in K_1sh+K_1yc—K_1d_2 gas system of Xujiaweizi region,this paper points out source rock,caprock,unconformity interface and ancient uplift to be the main factors controlling gas accumulation and distribution.The main accumulation period was the end of K_1q sedimentation period.There are three gas accumulation modes: gas migrating into bedrock crust of weathering through unconformity interface,gas migrating into volcanic rock in source rock through fractures and gas migrating into stratigraphic overlap through sandstone.K_1sh+K_1yc—K_1d_2 gas system in Xujiaweizi region is divided into four sub-gas systems: Shengping～Wangjiatun,Changde～Zhaozhou and Shuangcheng～Hulan are best systems,Chaochang～Zhaodong is better.Since K_1sh+K_1yc—K_1d_2 gas system formed in the end of K_1d_3,it expanded upward in the end of K_1qc—K_1qn,the end of K_1n,the end of K_2m and the end of Paleogene due to active opening of T_5(T_4)～T_3(T_2) faults,thus made the space of gas accumulation increased,and resulted in the phenomenon of 'gas from the same source rock accumulating in different positions',and also made the gas accumulation models changed.

关 键 词：(K1 sh+K1 yc)-K1 d2含气系统 研究 评价 徐家围子地区 

分 类 号：TE122.3[石油与天然气工程—油气勘探]