鄂尔多斯盆地东部二叠系山西组页岩气成藏条件与有利区筛选

发布时间：2018-02-05 04:22

  本文关键词： 页岩气 成藏条件 有利区筛选 山西组 鄂尔多斯盆地东部　出处：《地质学报》2016年01期 　论文类型：期刊论文

【摘要】：鄂尔多斯盆地东部榆106井区山西组页岩沉积在三角洲平原分流河道间沼泽、天然堤、决口扇远端与洼地环境。根据有机地球化学、物性、含气性、岩性实验分析,结合钻井、录井、测井资料与沉积相研究,开展了该区山西组页岩气成藏条件与有利区分布研究。山西组页岩有机碳含量较高,山二段平均5.28%,山一段平均3.02%,有机质类型以Ⅱ_2、Ⅲ型干酪根为主,有机质成熟度较高,R_o平均1.89%,生气条件优越。页岩孔隙度平均1.7%,渗透率平均0.0415×10~(-3)μm~2,平均含气量0.64 m~3/t,页岩单层厚度小,垂向上普遍与致密砂岩、煤层组成互层,累计厚度较大(平均达75 m),页岩渗透性较好而储集性能稍差。页岩脆性矿物含量平均49.9%,黏土矿物含量平均50.1%,黏土矿物含量较高,资源丰度普遍较低,但是页岩埋深小于3000 m,试气产能较高(0.64×10~4m~3/d),商业开发潜力较好。山二段有机质含量比山一段更高,含气性比山一段更好。主要基于页岩厚度与沉积相展布预测的山二段页岩气有利区呈北东向、南北向条带状展布,受分流河道间沼泽微相的控制。
[Abstract]:The shales of Shanxi formation of Yu106 well area in the eastern Ordos Basin are deposited in the swamp, natural dike, far end of crevasse fan and depression environment in delta plain distributary channel. According to organic geochemistry, physical property, gas content. The lithologic experimental analysis, combined with drilling, logging, logging data and sedimentary facies, has been carried out to study the formation conditions of shale gas in Shanxi formation and the distribution of favorable area. The shale organic carbon content of Shanxi formation is relatively high. The average value of the second member of the mountain is 5.28, the average of the first member of the mountain is 3.02, the type of organic matter is mainly type 鈪，

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