现代地质Issue(1)：144-154,11.
黄骅坳陷沧东凹陷孔二段泥页岩裂缝发育特征及主控因素分析
Fracture Characteristics and Main Controlling Factors of Shales of the Second Member of Kongdian Formation in Cangdong Sag,Huanghua Depression
摘要
Abstract
The shale in the second member of Kongdian Formation(Ek2 )in Cangdong Sag with large thickness, high values and excellent types of organic abundance,is one of the important intervals for dense petroleum ex-ploration.Based on the detail observation and description of cores,this paper studied lithologic characteristics, fracture types and development characteristics (including length,opening,angle and filling)of shales in Ek2 in Cangdong Sag of Huanghua Depression by the observation of polarizing microscope and fluorescence micro-scope and laser scanning confocal microscope together with analysis of X-ray diffraction and rock pyrolysis.Fur-thermore,it analyzed the main controlling factors of fracture development.The shales of Ek2 in Cangdong Sag are mainly composed of felsic,carbonate and clay minerals;the main lithologies are dolomitic shale,silty mud-stone,argillaceous dolostone,sandy dolomite and dolomite,etc;the main types of sedimentary structures in-clude massive structure,lamellar structure,laminated structure and lenticular structure,etc.Four sorts of frac-tures develop in Ek2 ,i.e.structural fracture,interlayer lamellation crack,vertical-difference load fracture and overpressure-breaking fracture,among which the structural fracture is the most,followed by the interlayer lamel-lation crack and vertical-difference load fracture,and the overpressure-breaking fracture is the least.The main fillings in fractures are pyrite,analcime,calcite and asphalt.The results show that tectonism,lithology,miner-al composition,sedimentary structure,diagenesis and organic matter abundance(TOC)are the main controlling factors for the development of fractures in shales of Ek2 in Cangdong Sag.关键词
泥页岩/裂缝/主控因素/沧东凹陷/孔二段Key words
shale/fracture/main controlling factor/Cangdong Sag/Ek2分类
能源科技引用本文复制引用
陈世悦,龚文磊,张顺,蒲秀刚,马洪坤,时战楠,张跃..黄骅坳陷沧东凹陷孔二段泥页岩裂缝发育特征及主控因素分析[J].现代地质,2016,(1):144-154,11.基金项目
国家自然科学基金项目（41372107）。 （）
