Lost circulation is often happened during drilling in multi -fracture formation.

井漏是多裂缝地层钻井作业中经常发生的复杂情况之一。

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Scientists point out that the it is very difficult for these duck-billed dinosaur fossil bones to move to more younger strata as of the fracture formation.

科学家们指出，这些鸭嘴龙的骨骼化石很难随着地层断裂迁移到较为年轻的地层之中。

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The effects that the rock tensile strength is in pore formation and the fracture formation are sufficiently considered, the formation fracture pressure is established.

充分考虑到碳酸盐岩剖面孔隙性地层和裂缝性地层中岩石抗张强度对地层破裂的影响，建立了地层破裂压力测井计算模型。

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They are encouraging drillers to use tainted coal mine water to hydraulically fracture gas wells in the Marcellus Shale formation, with the twin goals of diverting pollution from streams and rivers that now run orange with mine drainage and reducing the drillers' reliance on fresh sources of water.

WSJ: Pa. pushes drillers to frack with coal mine water