摘要
在断层内输导通道类型及其特征研究的基础上,将断层垂向封闭性分为2种类型:一种是针对倾斜裂缝或以泥质为主的断裂带连通孔隙的紧闭愈合封闭机理;另一种是针对垂直裂缝或以砂质填充为主的断裂带连通孔隙的成岩胶结封闭机理。利用断层压力和泥岩塑性变形极限之间的关系建立了断层紧闭愈合封闭机理的研究方法;利用SiO2和CaCO3的是否沉淀建立了断层成岩胶结封闭机理的研究方法。并以乌尔逊凹陷北部主要断层为例,利用上述方法对其在大一段内的的垂向封闭性进行了研究。研究结果符合实际地质情况,表明该方法用于研究断层内不同输导通道的垂向封闭性是可行的。
Based on the study of types and characteristics of transporting passways in faults, two types of vertical seal mechanisms of faults were divided. A vertical seal mechanism of fault is tight and heal seal mechanism for tip fractures or connected pores of fault zone filled mainly with mustone. Another vertical seal mechanism of fault is diagenetic cementation seal mechanism for vertical fractures or connected pores of fault zone filled mainly with sandstone. A method studying the tight and heal seal mechanism of fault was established by using the relationship between surround pressure on fault and plastic deformation limit of mudstone. Another method studying the diagenetic cementation seal mechanism of fault was established by using whether deposition of silica and carbonate or not. These method were applied in studying the vertical seal mechanism of main fault in the first member of Damoguaihe Formation, the north of Wuerxun Depression in the Hailar Basin. The research results are accordant with actual geological conditions. It indicates that the methods are practical to study the seal of different transporting passways of fault.
出处
《石油实验地质》
CAS
CSCD
北大核心
2005年第4期404-408,418,共6页
Petroleum Geology & Experiment
基金
国家"973"重点基础研究项目(2001CB209104)
黑龙江省教育厅科研项目(0551001)。
关键词
断层
输导通道
裂缝
连通孔隙
紧闭愈合
成岩胶结
fault
transporting passways
fractures
connected pores
tight and heal
diagenetic cementation
