摘要
五宝场沙溪庙组裂缝主要是构造缝,包括充填缝、部分充填的张开缝、溶蚀缝,局部裂缝发育处溶洞,洞密度局部0.111个/m～26.67个/m。裂缝成因主要为构造成因。五宝场盆地受来自喜山期起主导作用的来自南东方向的挤压力和其在工区南西方向派生的指向北东的应力、来自北东的挤压力及其派生的应力控制;五宝场沙溪庙组储集岩主要为灰、灰白色长石石英砂岩、长石砂岩、浅灰色长石岩屑砂岩、岩屑长石砂岩及岩屑砂岩等类型,总体上储层砂岩为脆性岩层,具有低胶结物含量,低成份成熟度,高结构成熟度的岩石学特征[8]。
Most of fissures in the Shaximiao Formation,Wubaochang are tectonic ones which were formed by SE-and NE-trending compressive stress in the Himalayan epoch.Reservoir of the Shaximiao Formation consists mainly of gray,grayish white feldspathic quartz sandstone,arkose,grayish feldspathic litharenite,lithic arkose and lithic sandstone which are characterized by brittle character,low cement,low compositional maturity and high textural maturity.
出处
《四川地质学报》
2011年第2期162-166,共5页
Acta Geologica Sichuan
