鄂尔多斯盆地西部下古生界风化壳优质储集层发育规律及成因机制: 以桃2区块马家沟组马五<sub>1-4</sub>亚段为例<sup>*</sup>

鄂尔多斯盆地西部下古生界风化壳优质储集层发育规律及成因机制: 以桃2区块马家沟组马五_1-4亚段为例^*

冯强汉¹, 许淑梅^2,^3,⁴, 池鑫琪^2,³, 舒鹏程^2,³, 孔家豪^2,³, 崔慧琪^2,³, 马慧磊^2,³

Development regularity and genetic mechanism of weathering crust reservoirs in the western Ordos Basin: take the sub-members 1-4 of Member 5 of Majiagou Formation in Tao 2 block as an example

Feng Qiang-Han¹, Xu Shu-Mei^2,^3,⁴, Chi Xin-Qi^2,³, Shu Peng-Cheng^2,³, Kong Jia-Hao^2,³, Cui Hui-Qi^2,³, Ma Hui-Lei^2,³

鄂尔多斯盆地桃2区块马五_1-4亚段白云岩中他形白云石晶粒的凹凸镶嵌状接触导致晶间孔和晶间溶孔极不发育 a—召88井3339.86 m$马五_{1}^{3}$小层,细晶白云岩他形镶嵌状白云石晶体,不见晶间孔和晶间溶孔;b—陕225井3429.37 m$马五_{3}^{1}$小层,粉晶白云岩极不发育的晶间孔和晶间溶孔,混入的少许泥质进一步降低了岩石的物性;c—桃35井3385.98 m$马五_{1}^{1}$小层,泥晶白云岩岩性致密,不见晶间孔和晶间溶孔。均为扫描电镜照片