【单选题】
71、地层压力梯度___正常地层压力梯度时，称为异常高压。
A. 大于
B. 大于或等于
C. 小于
D. 等于
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相关试题
【单选题】
72、在近平衡压力钻井中，钻井液密度的确定，以___为基准，再增加一个安全附加值，以保证作业安全。
A. 钻井液静液压力
B. 地层压力当量密度
C. 地层破裂压力当量密度
D. 地层漏失压力
【单选题】
79、___是指泵送钻井液通过地面高压管汇、水龙带、方钻杆、井下钻柱、钻头喷嘴，经过环形空间上返到地面循环系统过程中，因摩擦所引起的压力损失，其数值上等于钻井液循环泵压。
A. 关井立压
B. 循环压耗
C. 环空压耗
D. 关井套压
【单选题】
96、关井后，由于井筒处于密闭状态，如果___，就将出现关井压力。
A. 钻井液柱压力小于地层压力
B. 钻井液柱压力等于地层压力
C. 钻井液柱压力大于地层压力
D. 钻井液柱压力平衡地层压力
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