地球物理测井方法（高杰）B 2-1 声波速度测井.pptVIP

* 全波波形记录:深度间隔是可选的,横向时间采样间隔是每5μs采一点,全波采512个点,共2560μs * * * * This is one example of an output that can be produced utilizing LMP. The proposed list of outputs of the product will include but not be limited to the following: Youngs Modulus Poisson’s Ratio Rock Strength Biot’s Constant Bulk Modulus Shear Modulus Depth and TVD Depth Vshear Error Indicators * * Oriented perforations for sand control. In sand control, the 1800 phased perforations ensure that all the perforations connect to the fracture and are propped. This procedure eliminates the unconnected perforations that produce sand during drawdown. The use of 1800 phased perforations, oriented perpendicular to the minimum stress(Smin), is helpful in fracturing because these perforations minimize breakout that causes borehole tortuosity. * * * * * 理论、实验和大量现场资料都证明，偶极子（多极子）波的波速总是小于地层的横波波速，二者偏离的程度与地层的性质以及声波的频率有关 The slowness of the borehole flexural wave increases with frequency, called frequency dispersion At low frequency the flexural wave travels at the shear slowness The flexural wave reaches its largest amplitude when the slope of the dispersion curve is maximum (inflection point) Dispersion also depends on hole size and mud slowness * 发射部分:一个单极换能器和两个偏振方向互相正交的偶极子换能器（分别称为上、下偶极子）; 接收部分由8个接收阵列构成,每个接收阵由两对互相正交的偶极子接收换能器，一对与上偶极子发射平行，另一对下偶极子发射平行，并且可组合成单极子接收器; 声波探头的工作频率范围为80Hz-30kHz。 * 由上偶极换能器(或下偶极换能器)激发，用相同偏振方向的接收探头接收获得到八道波形。***波形采样时间间隔为40?s，每道波形采512个点。 * 用低频电脉冲激发单极源，每个接收阵组合为一个单极子接收器，在一个深度点上共得8道波形。 斯通利波首波的主频很低，只有600Hz左右 * 用高频脉冲激发单极源，每个接收阵组合为一个单极接收器，在一个深度点上共得8道波形。 * * * * * * * * GaoJ-2-1 Max. pressure: 20,000 psi(138MPa) Max. temperature: 350 0F (177 ℃) Storage Temperature: -55 ℃ Tension : 35,000 lbf (157 kN) Sonic Scanner (MSIP - Modular Sonic Imaging Platform) Makeup Length: 41.3 ft (12.58 m) Weight in air: 844 lbs (384 kg) Outside Diameter: 3 5/8” (9.21cm) 5 个发射探头： Monopole Upper(MU)(Near monopole) Monopole Lower(ML) (Near monopole) Monopole Far(MF)(Far monopole) X Dipole(XD) ; Y Dipole(YD) 13个