发明名称 Methods and apparatus for estimating borehole mud slownesses
摘要 Methods and apparatus for estimating borehole mud slownesses are disclosed. An example method includes estimating a borehole drilling fluid slowness value based on a tube wave modulus value, a tube-wave slowness value, and a drilling fluid density value. The borehole is associated with an anisotropic elastic medium.
申请公布号 US9581716(B2) 申请公布日期 2017.02.28
申请号 US201313746284 申请日期 2013.01.21
申请人 SCHLUMBERGER TECHNOLOGY CORPORATION 发明人 Karpfinger Florian;Walsh John;Prioul Romain
分类号 G01V1/06;E21B47/00;G01V1/50;E21B47/18 主分类号 G01V1/06
代理机构 代理人 Dae Michael
主权项 1. A method, comprising: providing a sonic tool in a borehole formed at least in part in an anisotropic subsurface formation wherein the sonic tool comprises at least one sonic signal transmitter; transmitting a sonic signal using the sonic tool; receiving the sonic signal through the anisotropic subsurface formation; generating borehole sonic waveform data associated with the sonic signal; and estimating a borehole drilling fluid slowness value based at least in part on the sonic waveform data wherein the estimating comprises adjusting a tube-wave slowness value term via a term that is based on a drilling fluid density value and a tube-wave modulus value that depends at least in part on radial displacements that vary along a contour of a borehole wall of the borehole due to stress response of the anisotropic subsurface formation to the sonic signal wherein the radial displacements are based at least in part on given anisotropic elastic properties, a pressure pulse and initial displacements.
地址 Sugar Land TX US