鄂尔多斯盆地南部长7陆相页岩基质孔隙发育类型及影响因素

发布时间：2018-04-14 18:40

本文选题：鄂尔多斯盆地 + 陆相页岩　；参考：《西安石油大学学报(自然科学版)》2017年05期

【摘要】：为了探究鄂尔多斯盆地南部长7陆相储层页岩基质孔隙发育影响因素,应用氩离子抛光-扫描电镜、X射线衍射能谱仪、有机碳测定、有机质成熟度测定、高压压汞和Image J图像处理等分析测试处理技术对其进行了系统研究。研究表明:长7陆相页岩中的基质孔隙类型主要包括长石和碳酸盐矿物粒内溶孔、粒间溶孔和黏土矿物层间孔,其中页岩孔隙中65%为溶蚀孔,20%为黏土矿物层间孔,其余为有机孔、微裂缝和残余粒间孔;页岩中黏土矿物含量最高;页岩中溶蚀孔的比例随有机质成熟度升高而增大。有机质热演化过程中产生的有机酸促进了基质孔隙发育,脆性矿物和胶结物充填了基质孔隙不利于孔隙发育,黏土矿物含量越高基质孔隙发育程度越低。
[Abstract]:In order to investigate the influencing factors on the development of shale matrix pore in the South Minister 7 continental reservoir in Ordos Basin, argon ion polishing and scanning electron microscope (SEM) X-ray diffraction spectrometer, organic carbon measurement and organic matter maturity measurement were used.High pressure mercury injection and Image J image processing are systematically studied.The results show that the matrix pore types of Chang 7 continental shale are mainly composed of dissolution pores in feldspar and carbonate minerals, intergranular dissolution pores and interlaminar pores of clay minerals, in which 65% of the pores in shale are corrosion pores and 20% are interlayer pores of clay minerals.The others are organic pores, microfractures and residual intergranular pores, the clay content in shale is the highest, and the proportion of dissolved pores in shale increases with the maturity of organic matter.Organic acids produced during the thermal evolution of organic matter promote the development of matrix pores, brittle minerals and cemented matrix pores are not conducive to pore development, and the higher the clay content is, the lower the development degree of matrix pores is.
【作者单位】：西安石油大学石油工程学院;西安石油大学陕西省油气田特种增产技术实验室;
【基金】：国家自然科学基金面上项目“页岩气藏水平井液态气动力压裂增产新方法研究”(51374170) 陕西省工业科技攻关项目“页岩气压裂储层多尺度孔隙气体赋存及流动规律研究”(2015GY109) 陕西省教育厅重点实验室科研计划基金资助项目(15JS086)
【分类号】：P618.13

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