徐家围子断陷储盖组合及对天然气富集的控制作用  

Reservoir-seal assemblage in Xujiaweizi fault depression and its control effect on natural gas enrichment

作　　者：王雅春[1,2] 李刚[1] 杨宏松[1] 张群[3] 

机构地区：[1]大庆石油学院地球科学学院,黑龙江大庆163318 [2]中国石油大学资源与信息学院,北京102249 [3]大庆石油管理局电力集团油田热电厂,黑龙江大庆163314

出　　处：《大庆石油学院学报》2009年第4期5-8,18,共5页Journal of Daqing Petroleum Institute

基　　金：黑龙江省教育厅科学技术研究项目(11531Z13)

摘　　要：通过天然气储层和盖层及其组合关系研究得到,徐家围子断陷主要存在K1yc1顶/K1yc1、K1d2/K1yc3和K1d2/K1yc43套储盖组合,K1yc1顶/K1yc1和K1d2/K1yc42套储盖组合主要分布在徐家围子断陷南部,K1d2/K1yc3储盖组合主要分布在徐家围子断陷北部.通过储盖组合与天然气分布之间关系研究得到,储盖组合对徐家围子断陷天然气富集具有3方面的控制作用:K1yc1顶/K1yc1和K1d2/K1yc3储盖组合岩性不同天然气富集程度不同;K1yc1/K1yc1储盖组合较K1d2/K1yc3储盖组合距沙河子组源岩近,天然气富集程度高;断陷南部与北部储盖组合不同,天然气富集程度不同.By research on natural gas reservoir and cap rock and their assemblage relation,it was considered that there were mainly top of K1yc1/K1yc1,K1d2/K1yc3 and K1d2/K1yc4 3 sets of reservoir-seal assemblage in Xujiaweizi fault depression.The top of K1yc1/K1yc1 and K1d2/K1yc4 2 sets of reservoir-seal assemblage is mainly distributed in the south of Xujiaweizi fault depression,while K1d2/K1yc3 reservoir-seal assemblage are mainly distributed in the north of Xujiaweizi fault depression.By studies on relation between reservoir-seal assemblage and natural gas distribution,it was concluded that there were mainly 3 aspects of control effect of reservoir-seal assemblage on natural gas enrichment in Xujiaweizi fault depression.Lithology of K1yc1/K1yc1 and K1d2/K1yc3 reservoir-seal assemblage is different so that natural gas enrichment degree is different.The distance from K1sh to K1yc1/K1yc1 reservoir-seal assemblage is shorter than that from K1sh to K1d2/K1yc3 reservoir-seal assemblage,so that natural gas enrichment degree in K1yc1/K1yc1 reservoir-seal assemblage is higher.Reservoir-seal assemblage in south and north of fault depression is different so that natural gas enrichment degree is different.

关 键 词：徐家围子断陷 天然气 储盖组合 富集程度 沙河子组源岩 

分 类 号：P618.130.2[天文地球—矿床学] P618.130.1[天文地球—地质学]