摘要
根据断裂带内部结构及其输导油气通道的类型与特征,研究了形成断层垂向封闭的主控因素. 结果表明:断层面压力控制着断裂带内空腔和倾斜裂缝愈合的程度;断移地层岩性控制着断裂填充物岩性,而断裂带填充物泥质质量分数在一定程度上制约着断裂带内连通孔隙能否封闭;SiO2 和碳酸盐的沉淀控制断裂带内垂直裂缝和未被泥质填充连通孔隙在垂向上能否封闭;故断层面压力、断裂带填充物泥质质量分数和SiO2 与碳酸盐的沉淀是断层垂向封闭的主控因素.
Based on the analysis of interior structure and type and characteristics of transporting passages in fault zone, this paper points out the pressure exerted on fault surface, the mudstone content of filling material in fault zone and precipitation of silica and carbonate to the main factors controlling the formation of the vertical seal of faults. The big or small of the pressure exerted on fault surface controls the tightness and seal of spaces and inclination fractures in fault zone. It is the direct factor that causes the spaces and inclination fractures in fault zone to be sealed. The lithology of strata faulted controls that of filling material in fault zone. The big or small of the mudstone content of filling material in fault zone controls the seal or open of connected porosity of fault zone to a certain degree. Precipitation of silica and carbonate is the main factors controlling the formation of the vertical seal of vertical fracture and connected porosity that were not blocked up by mudstone in fault zone. Whether there exist silica and carbonate precipitation controls the seal of open of vertical fractures and connected porosity that are not blocked up by mudstone in fault zone.
出处
《大庆石油学院学报》
CAS
北大核心
2005年第2期98-100,130,共4页
Journal of Daqing Petroleum Institute
基金
黑龙江省教育厅科学技术研究项目(10541001)
关键词
断层
垂向封闭性
空腔
裂缝
连通孔隙
主控因素
faults
vertical seal
spaces
fractures
connected porosity
main controlling factors
