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亚段岩心中膏模孔发育的膏云岩 a—桃35井3396.0 m$马五_{1}^{2}$小层,膏云岩中的膏模孔局部被充填形成残余孔隙;b—陕50井3490.2 m$马五_{4}^{1}$小层,膏模孔被局部充填形成残余膏模孔;c—桃34井3391.8 m$马五_{1}^{3}$小层,膏云岩中极为发育的膏模孔,大部分未充填;d—桃35井3395.0 m$马五_{1}^{3}$小层,密集分布的未充填或半充填膏模孔及微裂缝