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Memory Cement Bond Tool (MCBT)
Vigor's Memory Cement Bond Tool is to evaluate the cement bond integrity between the casing and formation in 8 angular segments by providing the measurements of the cement bond amplitude (CBL) through the near receivers at both 2-ft and 3-ft, variable density log (VDL) through the far receiver (5-ft), each segment covers a 45° section, which allows a 360° evaluation on the integrity of the cement bond.
Optional for compensated sonic Cement Bond Tool for the customized requirement. Compact structure design with a short length of the whole tool string for memory logging.
Description
①Vigor's Memory Cement Bond Tool (MCBT) is specifically designed to assess the integrity of the cement bond between the casing and the formation.
② Compact structure design with a short length of the whole tool string for memory logging.
③Vigor provides customized solutions: For those seeking customized solutions, we also offer an optional compensated sonic Cement Bond Tool. This tool can be tailored to meet specific requirements and boasts a compact structure design, resulting in a shorter overall length of the tool string. Such characteristics make it particularly suitable for memory-logging applications.
④A Comprehensive Evaluation: The Memory Cement Bond Tool (MCBT) divides the analysis into 8 angular segments, with each segment covering a 45° section. This enables a thorough 360° assessment of the cement bond's integrity, providing valuable insights into its quality.
How Does Memory Cement Bond Tool (MCBT) Work?
Memory Cement Bond Tool (MCBT) accomplishes this by measuring the cement bond amplitude (CBL) using near receivers positioned at both 2-ft and 3-ft intervals. Additionally, it utilizes a far receiver at a distance of 5-ft to obtain the variable density log (VDL) measurements.
Features of Memory Cement Bond Tool (MCBT)
①13-core quick change sub design
This feature allows for easy connectivity with other logging tools,which is crucial in creating comprehensive logging suites that can gather multiple data types in a single run.
②Integrated sensor
The tool combines gamma ray, Casing Collar Locator (CCL), and temperature sensors into a single unit. This integration allows for simultaneous data collection of multiple parameters:
- Gamma ray: Measures natural radioactivity of formations
- CCL: Identifies casing joints and depth correlation
- Temperature: Monitors wellbore temperature variations
③Post-logging calibration
The ability to calibrate after logging is completed enhances data accuracy. It allows for adjustments based on actual downhole conditions experienced during the logging run, potentially improving the interpretation of results.
④Inclination and relative azimuth measurement
This feature provides information about the tool's orientation in the wellbore, which is crucial for accurate data interpretation, especially in deviated or horizontal wells. It helps in understanding the tool's position relative to the wellbore and formation.
⑤Independent sensor structure
The sensors are designed as separate, modular units. This design improves reliability as individual sensors can be replaced or maintained without affecting the entire tool. It also simplifies maintenance procedures and potentially reduces downtime.
⑥Versatile deployment options
The tool can be run through various conveyance methods including drill pipe, tubing, slickline, or wireline. This flexibility is particularly valuable in highly deviated and horizontal wells where traditional wireline logging might be challenging or impossible.
⑦Large data storage capacity
With 10G bits of memory, the tool can store vast amounts of data. This is crucial for memory logging tools that need to record all data downhole for later retrieval.
⑧High-speed data acquisition
The 320ms acquisition frequency allows for very detailed logging, capturing rapid changes in wellbore conditions. This high resolution can be crucial for identifying small-scale features in the cement bond or formation.
⑨Fast data reading
The ability to read data at over 10Mb/s after logging significantly reduces the time required to download and begin analyzing the logged data once the tool is retrieved.
⑩ Extended logging duration
The large storage capacity allows for over 200 hours of continuous logging. This is particularly useful in long horizontal sections or when multiple logging passes are required.
⑪Operational efficiencies
The last three points highlight the operational benefits:
- Field labor saving: Fewer personnel may be required to operate the tool.
- Project time saving: The tool's efficiency can reduce overall project duration.
- Less equipment: The integrated nature of the tool and its versatility mean fewer separate tools or equipment pieces are needed on site.
Technical Parameters
| Parameter of Memory Cement Bond Tool (MCBT) | |
|
Pressure Rating |
14,500psi (100Mpa)/20,000psi(140Mpa) |
|
Temperature |
350℉(175℃) |
|
Min. Casing O.D. |
4" (101mm) |
|
Max. Casing O.D. |
10" (254mm) |
|
Tool O.D. |
2-3/4" (70mm) |
|
Tool Weight |
97lbs (44kgs) |
|
Max. Logging Speed |
32ft/min (10m/min) |
|
Conductor Utilization |
13-core |
|
Logging Conditions |
|
|
Well Fluid |
Oil, Fresh Water, Salty Water |
|
Tool Position |
Center of Casing |
|
Sensors Parameters |
|
|
Transmitter |
1 |
|
Receiver |
2 |
|
AD Resolution Ratio |
12 bit |
|
AD Acquisition Rate |
10Mps |
|
8-segment receiver: 3ft |
|
|
VDL receiver: 5ft |
|
|
Power Supply System |
|
|
Voltage |
15 to 30 VDC |
|
Current |
80mA @ 20VDC |
|
Sampling Period |
320ms |
|
Transducer |
20KHz |
|
Memory Capacity |
10G bits |
MCBT VS Traditional Logging Methods
①Comprehensiveness: Memory Cement Bond Tool (MCBT) can provide a 360° comprehensive assessment of cementing quality by measuring the cementation amplitude (CBL) using near-field receivers at 2 feet and 3 feet, and obtaining variable density logs (VDL) using far-field receivers at 5 feet, providing more comprehensive cementing quality information
② High precision: The design of MCBT allows it to be used in smaller casing inner diameters while maintaining measurement accuracy and reliability, which is critical to ensuring the long-term stability and safety of oil and gas wells.
③ Compact design: The compact structural design of MCBT enables it to be used in complex well conditions such as high-angle offset wells and horizontal wells, which may be difficult to achieve in traditional logging methods.
④ Technology integration: MCBT integrates a variety of sensors, such as gamma rays, CCL and temperature sensors, which help improve data accuracy and reduce dependence on other equipment.
⑤ Data processing capabilities: MCBT has large-capacity data storage and high-speed data acquisition frequency, which can achieve accurate logging, and fast data reading speed, which helps improve operational efficiency.
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