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井眼声波数据广泛用于油气工业的井开发设计方案、井眼稳定性、固井评价、完井及储层管理。在各种环境下提高作业效率,节省作业时间上,小井眼的声波仪器和井下传送工艺有了快速的发展。一种新的小井眼声波仪器可配置在2.25in四组合平台上作为标准电缆测井仪器串在裸眼井、套管井或其它如过钻杆和单芯连续油管配置井中应用。在可作为标准电缆测井仪器串的2.25in四组合测井平台包括了小井眼的声波仪器,能够实现套管井和裸眼井的测量,并且可用过钻杆传送方式或是单芯电缆连续油管传送方式。这种重量轻、直径小、紧凑的新仪器可实现单极阵列声波测量。它采用5个间距为6in接收器阵列和2个发射器。在多种地层和井眼条件下获取的大量的现场测试数据表明,配置于2.25in配套平台中新的小井眼声波仪性能达到声波仪器的工业标准,能够提供高质量纵横波测量。在从3in到9.875in的多种井眼尺寸井中,测速高达3600ft/hr情况下,仪器测井重复性非常好。在如粗糙井壁或水平井眼等恶劣井况下测井情况证实全阵列采集数据采集和慢度-时间相干(STC)处理的可靠性。双发射器设计在一个发射器发生故障是有良好的稳定性和备用性。采用STC处理方法在现场测试中固井质量好的井段获取了优质的过套管地层纵波慢度测量。
Wellbore acoustic data is widely used in the well development and design of the oil and gas industry, wellbore stability, cementing evaluation, completion and reservoir management. In a variety of environments to improve operating efficiency, save time on the job, slender hole sonic instruments and downhole transport technology has been rapid development. A new slimhole sonic instrument can be deployed on a 2.25in four-component platform as a standard cable logging string for use in openhole, cased or other well configurations such as overrun rods and single-core coiled tubing. A 2.25in four-well logging platform, which can be used as a standard cable logging string, includes slim borehole sounders that enable cased-hole and open-hole measurements and can be delivered with either a drill pipe transfer or a single cable coiled tubing the way. This lightweight, small diameter, compact new instrument enables monopole array sonic measurements. It uses 5 pitch 6in receiver array and 2 launchers. The extensive field test data obtained under various formation and wellbore conditions show that the new slimline sounder deployed in a 2.25-in-1 platform meets industry standards for sonic instrumentation and provides high quality S-wave measurements. Instrument logging repeatability was excellent at velocities of up to 3,600 ft / hr for multiple borehole size wells from 3 in to 9.875 in. Logging under harsh well conditions such as rough boreholes or horizontal boreholes confirms the reliability of full array acquisition data acquisition and slow-time-coherent (STC) processing. Dual transmitter design in a transmitter failure is good stability and standby. The STC treatment method was used to obtain good longitudinal compressibility and slowness measurement of over-casing formation in the wellsite with good cementing quality during on-site testing.