Ultrasonic Log Response in Lightweight Cement Conditions

Thomas, Sonia Jacob; Smith, C.D.; Williams, Brett; Hamilton, Layne

doi:10.2118/171612-ms

Cited by 3 publications

(7 citation statements)

References 1 publication

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“…It is important to find a reliable and consistent method for determining the presence of the cement sheath. 78 The usual procedures for cement job evaluation need to be modified for foamed cements. When running a cement bond log (CBL) with foamed cement, special steps must be considered due to the presence of gas in the slurry, which affects the attenuation of the slurry.…”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

“…By using this derivative, it is easy to identify the presence of lightweight cement and to assess its quality. 78 It is recommended to conduct temperature surveys 8 to 24 h after a cement job. The dilution of cement and the insulation effect of gas can result in a less pronounced thermal change compared to that of conventional extended cements.…”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

“…This can make it appear as though no cement is present, when in fact there is. It is important to find a reliable and consistent method for determining the presence of the cement sheath …”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

“…The derivative of the impedance provides valuable information, and the instantaneous change in curvature characterization that it provides is a direct reflection of the quality of the material that isolates the backside of the casing. By using this derivative, it is easy to identify the presence of lightweight cement and to assess its quality …”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

“…It is important to find a reliable and consistent method for determining the presence of the cement sheath. 84 …”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

See 4 more Smart Citations

Foamed Cement Applications in Oil Industry Based on Field Experience: A Comprehensive Review

Mahmoud,

Abdelaal,

Adjei

et al. 2024

ACS Omega

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Foam cement is a versatile cementing material that has found numerous applications in the oil and gas industry. As research continues to advance and improve the properties of foam cement, it is likely that we will see an increased use of this material in the years to come. This review aims to summarize the current state of the art and the latest developments in the utilization of foam cement in oil fields. The study focuses on the key benefits of foam cement, including its light weight, excellent flow properties, ability to maintain its structural integrity over time, and high compressive strength. It also examines its various applications in oil field operations, such as cementing against fragile formations, well abandonment, zonal isolation, cementing offshore wells, and well remedial cementing. Furthermore, the paper evaluates the various factors that influence the performance of foam cement, such as the mixing design, foam structure, and stability. In addition, the methods for evaluating the foamed cementing job and the integrity of the formed cement sheath are also presented. The review also highlights the current challenges and limitations of foam cement technology that should be considered when using foamed cement in oil field applications and discusses the future directions for its development and optimization. This review provides a comprehensive overview of the applications of foam cement in oil fields and will be of great interest to engineers, researchers, and practitioners in the oil and gas industry.

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Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

“…This can make it appear as though no cement is present, when in fact there is. It is important to find a reliable and consistent method for determining the presence of the cement sheath …”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

“…It is important to find a reliable and consistent method for determining the presence of the cement sheath. 84 …”

Section: Cement Job Evaluation Advances and Challenges (Evaluation Wi...mentioning

confidence: 99%

See 3 more Smart Citations

Foamed Cement Applications in Oil Industry Based on Field Experience: A Comprehensive Review

Mahmoud,

Abdelaal,

Adjei

et al. 2024

ACS Omega

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show abstract

Cement Evaluation Challenges

et al. 2018

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Cement Evaluation Logs are generally used to evaluate the quality of the cement sheath behind the casing or liner before a well test or production operation is performed in the well. In many countries, regulatory authorities require that cement evaluation logs be done in every well after cementing operations to investigate the presence and quality of the cement sheath. The main objective of the cement evaluation process is to evaluate the hydraulic isolation of the cement sheath. The main principle of cement bond log (CBL) tools is to send an acoustic signal inside the casing and measuring the acoustic impedance of the cement between the casing and the formation. The interpretation and processing of these measurements are sometimes complicated and difficult to understand because CBL can be affected by the downhole conditions and the input parameters for processing. Therefore, it is important to understand how the log is processed before planning for any remedial action based on the apparently poor cement quality obtained from the log. Also, there are some challenges such as lightweight cement, the presence of micro-annulus, and eccentricity of the tool itself may affect the measurement and the relating remedial action to solve the problem. Conventional cement evaluation tools are useful in most scenarios, but in more challenging operations, there is a pressing need for more advanced cement evaluation techniques to increase the confidence of the measurements for the evaluation of wellbore integrity. This paper demonstrates ultrasonic cement evaluation tools principles and examples for evaluating the quality of the cement bond. Also, the most common challenges and conditions which affect the sonic signal and lead to falsely indication of effective cement integrity. The processed case studies highlight the confidence of the cement isolation identified using these tools and evaluation techniques and their impact on the upcoming remedy actions.

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Three-Dimensional Simulation of the Influences of Operational Parameters on Stability of Formation-Cement Sheath-Casing Combination

Yuan¹,

Cheng²,

Zhu³

et al. 2020

MSF

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At present, most of the studies of the stability of the formation-cement sheath-casing combination have been mainly based on the plane, and the three-dimensional model established is only one example. There is no systematic study of the influence of physical parameters and process parameters on the stability of the combined body under the three-dimensional model and the action of triaxial crustal stress. Through the establishment of three-dimensional formation-cement sheath-casing linear elastic combination model, we can study the influence of operational parameters (cement sheath pressure, casing cross section pressure, inner casing pressure, ellipticity of borehole, centrality of casing, thickness of cement sheath) by the two interfaces’ Von Mises stress and the total displacement of the combination body. It is pointed out that the pressure of cement sheath, and casing cross section pressure have no effect on the stability of formation, cement sheath and casing; The higher the ellipticity of the borehole, the eccentricity of the casing (position 1, 2) and the thickness of the cement sheath, the higher the stability of the second interface of the cementing; The higher the inner casing pressure and the eccentricity of the casing(position 3), the lower the stability of the second interface of the cementing; The higher the eccentricity of the casing (position 2,3) and the thickness of the cement sheath, the higher the stability of the first interface of the cementing; The higher the inner casing pressure, the eccentricity of the casing (position 1) and the ellipticity of the borehole, the lower the stability of the first interface of the cementing; The higher the eccentricity of the casing (position 2,3) and thickness of the cement sheath, the higher the stability of the casing; The higher the inner casing pressure, the ellipticity of the borehole and the eccentricity of the casing(position 1), the lower the stability of the casing. Through this study, according to the formation stress, the formation physical parameters (elastic modulus, Poisson's ratio, density), optimize the operational parameters, ensure the long-term integrity of the combination.

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Ultrasonic Log Response in Lightweight Cement Conditions

Cited by 3 publications

References 1 publication

Foamed Cement Applications in Oil Industry Based on Field Experience: A Comprehensive Review

Foamed Cement Applications in Oil Industry Based on Field Experience: A Comprehensive Review

Cement Evaluation Challenges

Three-Dimensional Simulation of the Influences of Operational Parameters on Stability of Formation-Cement Sheath-Casing Combination

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