Development of Direct Measurement Technics for Thermophysical Properties of Rock Mass in situ by Well Logging

深储层岩石的热物理性质应直接通过测量技术在现场获得，因为实验室测量的价值观使用样本可能会受到影响，从而从钻孔期间的核心释放压力释放。作者已经开发了新的方法和系统，用于对热行为、热干扰和273 - 473 K处温度下的岩石的特定热量，并通过应用瞬态、热线比较方法。在本研究中，直径为d=80、50或30微米，长度= 50毫米的热导线被嵌入基底表面中心（40毫米× 90毫米× 10毫米的弹性硅胶板）用作参考材料。Three K-thermocouples， T型D20型D2， T型D21型D2 and T型D22型D2 of diameter d[1 m] were inlaid at x型D20型D2， x型D21型D2 and x型D22型D2[mm] from center of the hot-wire， respectively， in the surface。Temperature rise D20 ... More at x y D20 y D2， and the temperature difference D212 y D2=（·李伊D2 s李伊D2， respectively。最初，此方法应用于半无限体的平坦边界表面的样品所有热行为都是D2 FS-D2在研究中，曲线半径的比率的影响， R[mm]=D/2。（D：直径）到热导线的半径， r=d/2，并将其与基础的参考热行为的比率，i D2 Rie D2，to the sample thermal conductivity of the rocks in situ，D2s D2， on measurement values for curved boundary surface of the borehole，D2cs D2， was studied to evaluate the values of D2。模型boreholes from 66到120 mm in diameter were？lled in each several blocks of rocks（rocks）（差异值）（D2）六种类型的传感器包括在热线和热耦合器中有不同的二极管， d[μm]的80、50和30种使用。The inlaid positions of xイルD20イルD2， xイルD21イルD2 and xイルD22イルD2 were fixed at 0. 5，2. 0 and 4. 0 mm， respectively。As the results， suitable design parameters were obtained in order to evaluate the thermal conductivity，如果测量λ-值在弯曲边界表面中钻孔到子表面材料具有D2 FS D2 were D2CS D2， the ratio of（3）比D/d=2400的比率少+10%，比D/d=3000的比率少+5%，比D/d=3000的比率少+10%，尊重地，without dependency of the ratio of （D2/D2）。第1号原型的探针是由合成橡胶制成的，用于具有直径D=116至120毫米的基底是由设计的。地下室是由压缩的空气或液压油压制的，在探测器被插入到空洞后。Less（低）

Thermophysical properties of deep reservoir rocks should be directly obtained by a measurement technique in situ, because their values by laboratory measurements using samples might be influenced due to the intracrystalline microcracks originating from a stress released from the core during the drilling. The authors have developed a new method and system for simultaneous measurements of the thermal conductivity, the thermal diffusivity, and the specific heat of rocks in situ at temperatures from 273 to 473K, by applying the transient, hot-wire comparative method. In this study, a hot wire with diameter, d=80, 50 or 30μm and length=50mm was inlaid in the center of the surface of the substrate (elastic silicon gum plate of 40mm×90mm×10mm) used as a reference material. Three K-thermocouples, TィイD20ィエD2, TィイD21ィエD2 and TィイD22ィエD2 of diameter d[μm] were inlaid at xィイD20ィエD2, xィイD21ィエD2 and xィイD22ィエD2[mm] from center of the hot-wire, respectively, in the surface. Temperature rise ΔθィイD20ィエD2 … More at xィイD20ィエD2, and the temperature difference ΔθィイD212ィエD2=(θィイD21ィエD2)-θィイD22ィエD2) between θィイD21ィエD2 at xィイD21ィエD2 and θィイD22ィエD2 at xィイD22ィエD2 against logarithmic time ln(t) and 1/(t), respectively, were used in calculation of the thermal conductivity, λィイD2sィエD2, and the thermal diffusivity, αィイD2sィエD2, respectively. Originally this method is applied for flat boundary surface of half infinite body of the sample whose thermal conductivity is λィイD2FSィエD2 (=λィイD2sィエD2).In the study, the effect of a ratio of the curvature radius of a borehole, R[mm]=D/2 (D: diameter) to the radius of the hot wire, r=d/2, and the ratio to the reference thermal conductivity of the substrate, λィイD2RィエD2, to the sample thermal conductivity of the rocks in situ, λィイD2sィエD2, on measurement values for curved boundary surface of the borehole, λィイD2csィエD2, was studied to evaluate the values of λィイD2sィエD2. Model boreholes from 66 to 120mm in diameter were drilled in each several blocks of rocks having different values of λィイD2sィエD2. Six types of sensors inlaying the hot-wire and the thermocouples having different diameters, d[μm] of 80, 50 and 30 were used. The inlaid positions of xィイD20ィエD2, xィイD21ィエD2 and xィイD22ィエD2 were fixed at 0.5, 2.0 and 4.0 mm, respectively.As the results, suitable design parameters were obtained in order to evaluate the thermal conductivity, λィイD2FSィエD2. If the measured λ-values on the curved boundary surface in the borehole drilled into the subsurface material having λィイD2FSィエD2 were λィイD2CSィエD2, the ratio of (λィイD2CSィエD2/λィイD2FSィエD2) were less than +10% for the ratios larger than D/d=2400, and less than +5% for the ratios larger than D/d=3000, respectively, without dependency of the ratio of (λィイD2SィエD2/λィイD2RィエD2). Probes of prototype No.1 of which substrates were made by synthetic rubber for boreholes having diameter D=116 to 120mm were designed. The substrates are pressurized by compressed air or hydraulic oil, after the probes have been inserted into the borehole. Less