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泥浆浸泡作用能提高井壁岩石的纵波声速,但只对含气岩石的作用明显。采用VSP 法对已受泥浆浸泡接近饱和的井壁岩石纵波声速和未受泥浆浸泡的深入井壁稍远的岩石纵波声速进行比较,从而得以明确气层在该井深处是否存在。
Mud soaking can increase the longitudinal wave velocity of wellbore rocks, but only has an obvious effect on gas-bearing rocks. The VSP method is used to compare the longitudinal compressional velocity of rock near the saturated saturated soaking slurry with the velocity of the longitudinal compressional wave of the rock that is not muddy soaked in the deep wellbore to determine whether the gas reservoir exists deep in the well.