下寺湾油田柳洛峪区长8储集砂岩的微裂缝特征  

Microcrack Characteristics of Chang8 Reservoir Sandstones in Liuluoyu Area of Xiasiwan Oil Field

作　　者：高平[1] 杨云祥[1] 姜红艳[1] 

机构地区：[1]延长油田股份有限公司下寺湾采油厂,陕西延安716102

出　　处：《辽宁化工》2012年第10期1037-1038,共2页Liaoning Chemical Industry

摘　　要：通过对下寺湾油田柳洛峪区长8油层组取芯井段的砂岩薄片的观察结果显示,微裂缝类型为构造缝和层理缝两种,且以构造缝为主。微裂缝的开度主要集中在0.10~0.15 mm,微裂缝的长度差异较大,微裂缝的间距以间距较小的微裂缝数量居多。微裂缝大部分为全充填缝,少量为半充填缝和开启缝,充填物主要为泥质,约占50%,少数为方解石和铁质及其它充填物。Observation about the sandstone thin section of hole interval of Chang8 oil formation in Liuluoyu area of Xiasiwan oil field show that: microcrack types includes structural cracks and bedding cracks,in which the structural cracks are main.The opening of the microcracks is mainly in 0.10～0.15 mm,and lengths of the microcracks have bigger difference,and main interval between the microcracks is little.Most of the microcracks are full-filling cracks,few microcracks are half-filling and open cracks,the fillings are mainly shale,which are about 50 %,few fillings are calcite,iron and other fillings.

关 键 词：微裂缝 充填物 砂岩 长8油层组 

分 类 号：P618[天文地球—矿床学]