摘要
柴西地区第三系地层中多发育平行层面缝,通过岩心及荧光显微镜观察并借助扫描电子显微镜(SEM)和X射线衍射仪(XRD),确定了柴西地区第三系发育平行层面缝岩石自上而下存在2种粘土矿物组合:伊/蒙间层+伊利石+绿泥石+(高岭石)→伊利石+绿泥石+伊/蒙间层+绿/蒙间层+(高岭石),粘土矿物占全岩矿物比例介于7%～27%之间,粘土矿物吸附并保存了有机质,这是异常高压、强还原环境、有机质及平行层面缝优势输导体系和强水动力作用多种因素叠加影响的结果。
Core sample and microscopic fluorescent observation, SEM and X-ray diffraction research showed that there are two types of clay minerals combination from top to bottom of parallel level fractures, the Tertiary in western Qaidam basin： I/S＋I＋CH＋（K）-I＋CH＋I/S＋C/S＋（K）. Contents of clay minerals lie between 7%-27%, and tend to decrease gradually with increasing depth. Organo clay complexe is the consequence of abnormal high fluid pressure, reduction environment, orlzanic matter, passage system of fractures and hydrodynamic force.
出处
《矿物学报》
CAS
CSCD
北大核心
2013年第1期57-62,共6页
Acta Mineralogica Sinica
基金
国家油气专项(批准号:XQ-2004-01)
