The spontaneous potential is closely related to salinity in formation and mud filtrate.
自然电位的形成与地层水矿化度和钻井液滤液矿化度密切相关.
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Mud filtrate invasion depth and pollution degree are two important parameters in the optimum perforation design.
泥浆侵入深度和污染程度是优化射孔设计中的2个重要参数.
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