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This article describes how Cement Bond Logs are used to interpret the quality of the cement bond. The Cement Bond Logs (CBL) gives a continuous measurement of the amplitude of the first casing arrival at a receiver spaced 3 ft from an acoustic transmitter. The amplitude is a maximum in unsupported pipe, and a minimum for well cemented …
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The RADii® Segmented Cement Bond Tool uses a single ceramic transmitter, an eight or sixteen segment receiver at 3 ft. and a single receiver at 5 ft. spacing. The segmented receiver generates a cement map which enables identification of cement channelling, while the single receiver generates the traditional cement bond log (CBL) and a
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The cement bonding evaluation method is one of research hot topics in acoustic well logging. According to the tool source frequency, cement bonding evaluation methods can be divided into sonic (around 20 kHz) and ultrasonic methods (several hundred thousand Hz).
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ABSTRACT. A cement bond log (CBL) plays an important role when evaluating the quality of cement behind casing and determining well integrity, which in turn helps to ensure zonal isolation and wellbore protection. Logging-while-drilling (LWD) sonic tools provide an economical solution for locating the top of cement and determining the …
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ABSTRACT. The present Cement Bond Log (CBL) provides a measurement of the compressive strength of the cement layer between the casing and the borehole walls. It also gives a qualitative estimate of the cement to formation bond. The Cement Bond Tool (CBT) has been developed specifically to evaluate cemented casings while eliminating …
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A specialized type of sonic log is the cement-bond log (CBL) or bond-attenuation log (BAL) that uses the full-waveform to assess how well casing is bonded to the formation. Several tool designs are available, but they all generally assess amplitude and attenuation of the waveform to evaluate the strength of the formation bond.
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Probe's Well Integrity solution platform includes RADii™, the industry standard for Segmented Cement Bond Log tools, iQ™ Magnetic Properties and ProMAC™ Multi-Arm Caliper Tools. The platform enables high accuracy measurements for Cement Evaluation, as well as Corrosion and Well Integrity monitoring.
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The Dual Analog Tool (DBT) evaluates the cement bond quality and integrity to both pipe and formation by providing the measurements of the cement bond amplitude (CBL) through near receiver (3-ft crystal ), and variable density log (VDL) through far receiver (5-ft …
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Single-shot inclination-only survey tools (TOTCO) Packer Setting Mechanism ; Drilling program example (Semi-Sub) 12.25" guidelines for tripping, making connections and back reaming ... Cement Evaluation - Cement Bond Log Interpretation . This article presents the key elements for Cement Bond Log Interpretation (free pipe, good bond, hard ...
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Cement bond logging (CBL) is an important part of a well-completion program and is also recommended for most workover programs. Most of the cementing-related problems encountered can be diagnosed by use of the CBL. However, successful interpretation of a CBL depends on certain minimum requirements: The tool must be run …
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ABSTRACT. Since the CBL tool came into use over 30 years ago, Bond Index (BI) has been the most important parameter in interpreting a valid log. In recent years, more and more engineers started disbelieving the CBL because they found that the BI did not often tell the truth. Several investigators have been tackling this problem, but …
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Bond Tool Example • Collar Locator • Gamma Ray • Acoustic Transmitter • 3ft Receiver • 5ft Receiver ... 3ft Receiver 5ft Receiver Bow Spring Centralizer Radial Bond Log (RBL) Cement Bond Log (CBL) 1 2 6 5 4 3 7 8. 6 What is Measured on Bond Logs • Recorded on ALL sensors: – Amplitude (strength of the first arrival) – Travel Time ...
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The Segmented Cement Bonding Tool (SBT) is a new type cement bond logging tool. The tool divides casing, cement annulus and formation into six segments. The sensors are pushed against well wall for measurement to achieve high accuracy, unaffected by casing fouling, micro annulus, fast formation and mud property change.
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The Radial Bond Tool™ from Baker Hughes improves cement evaluation compared to conventional cement bond logs. The tool combines eight radially distributed receivers with a 5-ft (1.5-m) receiver to provide detailed analysis of casing formation bonding. You'll get these results immediately and in an clearly interpreted manner.
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The High Speed Radial (HSR) presents the next generation of cement bond tools. It evaluates the cement bond quality and integrity to both casing and formation by providing a 360° cement map with a dedicated 8-segment Radial receiver located (2-ft) from the transmitter It also provides standard cement bond amplitude (CBL) through Near …
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