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[单选题]
Q/SY02552-2018《钻井井控技术规范》中规定:录井的井控要求包括:录井人员应到循环罐上核对钻井液量,目的层作业每()一次,非目的层作业每()一次,特殊情况下加密核对次数
A.2h;4h
B.2h;6h
C.0.5h;2h
D.1h;2h
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B、2h;6h
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.2h;4h
B.2h;6h
C.0.5h;2h
D.1h;2h
B、2h;6h
A.30mg/m3(20ppm)
B.45mg/m3(30ppm)
C.75mg/m3(50ppm)
D.150mg/m3(100ppm)
A.地层孔隙压力梯度
B.地层破裂压力梯度
C.地层坍塌压力梯度
D.地层漏失压力梯度
A.阈限值
B.安全临界浓度
C.危险临界浓度
D.4.3ppm以下
A.25
B.30
C.50
D.100
A.钻井液密度
B.套管的层次
C.套管鞋破裂压力
D.地层流体性质