鄂西鹤峰地区下寒武统牛蹄塘组泥页岩储层特征——以江坪河剖面为例

通过有机地化学、物性分析和等温吸附模拟等方法,对鄂西鹤峰地区江坪河剖面牛蹄塘组泥页岩储层进行了研究。研究表明,江坪河剖面牛蹄塘组泥页岩厚度较大,达118.6 m,有机碳含量高,介于0.77%~13.10%,平均值2.92%,热演化程度高,沥青反射率R c值介于2.90%~5.74%,平均值4.18%,脆性矿物含量丰富,平均值为57.5%,气体吸附能力强,等温吸附气量为0.91~5.12 m^3/t,平均值2.79 m^3/t。综合分析认为,鄂西鹤峰地区牛蹄塘组泥页岩储层条件好,具有良好的勘探前景。

Characteristics of Shale Reservoir in the Lower Cambrian Niutitang Formation of Hefeng Area in Western Hubei Province

Through the methods of organic geochemistry,physical properties and isothermal adsorption simulation,the shale reservoir of Niutitang formation in Jiangpinghe section of Hefeng area,Western Hubei Province are studied.Research shows that the Niutitang formation organic rich shale thickness is relatively high,with an value of 118.6m,the organic carbon content range from 0.77%to 13.1%,with an average value of 2.92%.The degree of thermal evolution is over mature stage,brittle mineral content is relatively high with an average value of 57.5%.Several types of pores and fissure are present in the shale.The adsorption isotherm experiments show that adsorbed gas in shale range from 0.91 m^3/t to 5.12 m^3/t with an average value of 2.79%,which have strong adsorption capacity.It is considered that shale reservoir conditions of Niutitang formation in the west of Hubei Province are good,which has a good exploration prospects.