鄂尔多斯盆地SMG探区长8段致密储层特征
发布时间：2018-12-12 12:44
【摘要】：通过孔渗测定、电镜扫描、铸体薄片、阴极发光、高压与恒速压汞等测试手段,对鄂尔多斯盆地SMG探区长8段致密储层的孔渗关系、岩石学特征、孔喉结构及尺寸分布进行全面系统地剖析,结果表明:该区长8储层平均孔隙度为6.52%,平均渗透0.113×10-3μm~2,孔渗关系复杂,井间非均质性较强;储层碎屑组分以长石为主,属长石砂岩;发育粒间孔和长石等溶孔,绿泥石与泥质填隙物含量较高,使得孔渗条件进一步变差,属微孔-微喉型结构;依据压汞参数及毛管力曲线特征将长8储层分为3类:Ⅰ类为低门槛压力-高进汞饱和度型,Ⅱ类为低门槛压力-低进汞饱和度型,Ⅲ类为高门槛压力-低进汞饱和度型,Ⅰ类储层最好,属于"优质"储层,Ⅱ类次之,Ⅲ类最差。
[Abstract]:By means of measurement of porosity and permeability, scanning electron microscope, casting sheet, cathodoluminescence, high pressure and constant velocity mercury pressure, the relationship between porosity and permeability and petrological characteristics of the tight reservoirs of the Chang 8 member in the SMG area of Ordos Basin are studied. The results show that the average porosity of Chang 8 reservoir is 6.52, the average permeability is 0.113 脳 10 ~ (-3) 渭 m ~ (-2), the relationship between pore and permeability is complex, and the cross-well heterogeneity is strong. The clastic composition of the reservoir is mainly feldspar, which belongs to feldspar sandstone, and develops intergranular pore and feldspar dissolution pore, and the content of chlorite and muddy interstitial material is higher, which makes the pore and permeability condition worse, and belongs to micropore microlarynx structure. According to the characteristics of mercury injection parameters and capillary force curves, Chang 8 reservoirs are divided into three types: type I, low threshold pressure-high mercury saturation, type 鈪，
本文编号：2374573
[Abstract]:By means of measurement of porosity and permeability, scanning electron microscope, casting sheet, cathodoluminescence, high pressure and constant velocity mercury pressure, the relationship between porosity and permeability and petrological characteristics of the tight reservoirs of the Chang 8 member in the SMG area of Ordos Basin are studied. The results show that the average porosity of Chang 8 reservoir is 6.52, the average permeability is 0.113 脳 10 ~ (-3) 渭 m ~ (-2), the relationship between pore and permeability is complex, and the cross-well heterogeneity is strong. The clastic composition of the reservoir is mainly feldspar, which belongs to feldspar sandstone, and develops intergranular pore and feldspar dissolution pore, and the content of chlorite and muddy interstitial material is higher, which makes the pore and permeability condition worse, and belongs to micropore microlarynx structure. According to the characteristics of mercury injection parameters and capillary force curves, Chang 8 reservoirs are divided into three types: type I, low threshold pressure-high mercury saturation, type 鈪，
本文编号：2374573
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2374573.html
