1.1 本指南涵盖了对通常应用于地质、工程、地下水和环境（以下简称岩土）调查的钻孔、井、检修管、沉箱或竖井（以下简称钻孔）进行井径测井所需的一般程序。不包括用于矿产或石油勘探和开发的井径测井。 1.1.1 本指南提供了有组织的信息收集或一系列选项，并不推荐具体的行动方案。本文件不能取代教育或经验，应与专业判断一起使用。并非本指南的所有方面都适用于所有情况。 本ASTM标准不代表或取代必须根据其判断给定专业服务的充分性的谨慎标准，也不应在不考虑项目的许多独特方面的情况下应用本文件。本文件标题中的“标准”一词仅表示该文件已通过ASTM共识程序获得批准。 1.2 本指南将井径测井定义为随深度变化的钻孔直径记录。 1.2.1 井径测井在地球物理测井解释中至关重要，因为地球物理结果可能会受到钻孔直径的显著影响。 1.2.2 井径测井为钻孔完井和测试提供了有用的信息，通常用于评估钻孔直径、形状、粗糙度和稳定性； 计算钻孔体积；提供钻孔施工信息；并圈定岩性接触面、裂缝、溶洞和其他开口。 1.2.2.1 钻孔直径信息对于从流量计日志计算体积率至关重要。 1.2.2.2 井径测井用于确定充气式封隔器在钻孔测试中的最佳位置。充气式封隔器只能在规定的钻孔直径范围内形成有效密封，如果放置在粗糙或不规则的钻孔部位，则可能会损坏。 1.2.2.3 井径测井用于估计钻孔完井材料（水泥、砾石等）的体积。 )需要填充钻孔和套管或井网之间的环形空间。 1.2.2.4 根据与岩性相关的放大程度，井径测井可用于对比钻孔之间的岩性。测量的钻孔直径可能与钻孔直径显著不同，因为塑性地层扩展到钻孔中，易碎地层扩大了钻孔。一系列井径测井也可能显示钻孔直径随时间的增加或减少。 1.3 本指南仅限于带弹簧加载臂的机械装置，弹簧加载臂是用于岩土工程井径测井的最常见卡尺。 1.4 本指南概述了井径测井，包括一般程序、特定文件、校准和标准化以及测井质量和解释。 1.5 本指南将与指南一起使用 D5753 . 1.6 本指南不应作为井径测井的唯一标准，也不应取代专业判断。井径测井程序应适应各种应用的需要。本指南中的信息以一般术语表述，以确保灵活性或创新性不会受到抑制。 1.7 单位- 以国际单位制表示的数值应视为标准值。括号中给出的值是英寸的数学转换- 磅单位，仅供参考，不被视为标准单位。以国际单位制以外的单位报告试验结果不应视为不符合本标准。 1.8 本指南并非旨在解决与其使用相关的所有安全和责任问题（例如，探头丢失或卡住以及设备去污）。 1.9 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.10 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 适当制定、记录和执行的指南对于正确收集和应用井径测井至关重要。本指南将与指南一起使用 D5753 . 5.2 使用它的好处包括:改进井径测井方法和设备的选择、井径测井质量和可靠性，以及井径测井数据对后续显示和解释的有用性。 5.3 本指南适用于岩土工程应用中常用的井径测井方法。 5.4 重要的是人员（请参阅指南的人员部分 D5753 )查阅有关卡尺技术、应用和解释方法的最新教科书和报告。

1.1 This guide covers the general procedures necessary to conduct caliper logging of boreholes, wells, access tubes, caissons, or shafts (hereafter referred to as boreholes) as commonly applied to geologic, engineering, groundwater, and environmental (hereafter referred to as geotechnical) investigations. Caliper logging for mineral or petroleum exploration and development are excluded. 1.1.1 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process. 1.2 This guide defines a caliper log as a record of borehole diameter with depth. 1.2.1 Caliper logs are essential in the interpretation of geophysical logs since geophysical results can be significantly affected by borehole diameter. 1.2.2 Caliper logs provide useful information for borehole completion and testing and are commonly used to assess borehole diameter, shape, roughness, and stability; calculate borehole volume; provide information on borehole construction; and delineate lithologic contacts, fractures, and solution cavities and other openings. 1.2.2.1 Borehole-diameter information is essential for calculation of volumetric rate from flowmeter logs. 1.2.2.2 Caliper logs are used to locate the optimum placement of inflatable packers for borehole testing. Inflatable packers can only form an effective seal within a specified range of borehole diameters, and can be damaged if they are set in rough or irregular parts of the borehole. 1.2.2.3 Caliper logs are used to estimate the volume of borehole completion material (cement, gravel, etc.) needed to fill the annular space between borehole and casing(s) or well screen. 1.2.2.4 Caliper logs may be applied to correlate lithology between boreholes based upon enlargements related to lithology. The measured borehole diameter may be significantly different than the drilled diameter because of plastic formations expanded into the borehole and friable formations enlarging the borehole. A series of caliper logs may also show increases or decreases in borehole diameter with time. 1.3 This guide is restricted to mechanically based devices with spring-loaded arms, which are the most common calipers used in caliper logging with geotechnical applications. 1.4 This guide provides an overview of caliper logging, including general procedures, specific documentation, calibration and standardization, and log quality and interpretation. 1.5 This guide is to be used in conjunction with Guide D5753 . 1.6 This guide should not be used as a sole criterion for caliper logging and does not replace professional judgment. Caliper logging procedures should be adapted to meet the needs of a range of applications. Information in this guide is stated in general terms so that flexibility or innovation is not suppressed. 1.7 Units— The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units, which are provided for information only and are not considered standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard. 1.8 This guide does not purport to address all of the safety and liability problems (for example, lost or lodged probes and equipment decontamination) associated with its use. 1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 An appropriately developed, documented, and executed guide is essential for the proper collection and application of caliper logs. This guide is to be used in conjunction with Guide D5753 . 5.2 The benefits of its use include the following: improving selection of caliper logging methods and equipment, caliper log quality and reliability, and usefulness of the caliper log data for subsequent display and interpretation. 5.3 This guide applies to commonly used caliper logging methods for geotechnical applications. 5.4 It is essential that personnel (see the Personnel section of Guide D5753 ) consult up-to-date textbooks and reports on the caliper technique, application, and interpretation methods.