【摘要】 河南中牟区块ZDY2井海陆过渡相太原组和山西组页岩气层系地质特征分析表明:太原组和山西组富有机质页岩厚度均为77.5m,有机质类型主要为Ⅲ型,少量Ⅱ型;有机碳平均含量分别为2.18%和1.90%;有效孔隙度分别为1.53%和2.4%,现场解析平均含气量分别为1.32m~3/t和1.1m~3/t,其中太原组中部优质压裂层段平均含气量为1.56m~3/t;有机质成熟度Ro值在2.6%～3.4%之间;黏土矿物以伊利石和伊蒙混层为主。综合研究认为中牟区块太原组、山西组页岩气层系普遍含气,太原组中部页岩层段及山西组下部大占砂岩是有利勘探层位。通过ZDY2井太原组中部43.3m页岩层段压裂,获得日产天然气3 614m~3,南华北盆地海陆过渡相页岩气勘探取得重大进展。更多还原

【Abstract】 Analysis of geological characteristics of shale-gas rock sequence of Taiyuan Formation and Shanxi Formation in well ZDY2 of Zhongmu block in Henan province shows that the organic-rich shale is77.5 mthick and the organic matter type Ⅲis dominated with a little type Ⅱ.The average content of TOC is 2.18% and 1.90% respectively,the effective porosity is 1.53% and 2.4%,the gas content that is is about 1.32 and 1.1 cubic meters per ton.The preferable crushed layer in the middle of Taiyuan formation has the gas content of 1.56 m~3/t.The organic matter maturity Ro is 2.6% to 3.4%.The clay minerals are mainly interlayered illite and smectite.Integrative researches indicate that the shales of Taiyuan and Shanxi formations contain gas generally and the middle of Taiyuan formation and the Dazhan sandstone at bottom of Shanxi formation are the preferable exploration layers.By fracturing the middle shale section 43.3 mthick in Taiyuan Formation is obtained gas production of 3614 cubic meters each day and is made a breakthrough at sea-continent transitional facies shale gas exploration in basins in the south of the North China.更多还原