Medium hard formation with high compressive strength. Such as hard shale, limestone, sandstone, dolomite, anhydrite and marble.
高抗压强度的中硬地层,如硬页岩。石灰岩。砂岩。白云岩。和硬石膏。大理石。
Low compressive strength of soft to medium formations. Such as soft shale, soft limestone, soft sandstone, hard and soft abrasive interbedded medium formation.
低抗压强度的软到中等地层,如中软页岩。中软石灰岩。中软砂岩。和软硬研磨性夹层的中等地层。
The reservoir rocks consist of conglomerate, pebbly sandstone, medium-fine sandstone and siltstone.
储层岩石类型有砾岩、含砾砂岩、中细砂岩及粉砂岩。
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