Experimental Determination of Elastic Anisotropy and Biot's Constant in a Saudi Arabian Reservoir Sandstone

Azeemuddin, M.; Khan, K.; Khan, M.N.; Abdulraheem, Abdulazeez; Rahim, Z.; Al-Qahtani, M.Y.

doi:10.2523/78503-ms

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…In the first experiment, K is obtained by setting the pore pressure to zero; and in the second experiment, Ks is obtained by setting the pore pressure and confining pressure equal to each other. Azeemuddin [10] improved this technique by measuring K and Ks with "static" and "dynamics" methods. According to Eqs.…”

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confidence: 99%

A new method to determine Biot's coefficients of Bakken samples

Rui²,

Ling

2016

Journal of Natural Gas Science and Engineering

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In recent years, the development of oil and gas from shale has proceeded quickly in the world through the use of multistage fracturing technology in horizontal well. However, without the knowledge of rock poroelastic characteristics, the successful rate of hydraulic fracturing will be low. Among those poroelastic characteristics, effective stress is required for creating artificial fractures in the shale formation. In this study a new method is proposed to measure the Biot"s coefficient, which is one of the key poroelastic parameters for calculating the effective stress.The Biot"s coefficient is obtained after the variations of both the confining and the pore pressures are recorded with a simplified measuring procedures. The Bakken shale samples from Williston Basin are tested. The experiment results show that the Biot"s coefficient of Bakken samples obtained from horizontal drilling and vertical drilling are significantly different from each other. This provides a solid base to scientists and engineers for Bakken in-situ stress analysis during multistage hydraulic fracturing and reservoir depletion due to production. IntroductionIn recent years, the development of oil and gas from shale has proceeded quickly in the world through the use of multistage fracturing technology in horizontal well. By creating the fractures to enlarge the stimulated reservoir

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confidence: 99%

A new method to determine Biot's coefficients of Bakken samples

Rui²,

Ling

2016

Journal of Natural Gas Science and Engineering

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Log-Based Pore Volume Compressibility Prediction—A Deepwater GoM Case Study

Wolfe¹,

Russell²,

Luise³

et al. 2005

SPE Annual Technical Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractPore Volume Compressibility (PVC) is one of the most important parameters for proceeding with project sanctioning. An accurate estimation of pore volume compressibility of reservoir rocks is essential for compaction evaluation, reservoir drive determination, reserves estimates, reservoir pressure maintenance, casing collapse analyses, and production forecasting. This information is then used in modeling the reservoir and calculating the economic value of the project. Thus, obtaining credible indications of this value early in the well evaluation process is invaluable. Unfortunately, this data is usually required long before a conventional core can be obtained and mechanical rock properties measured. Furthermore, cores are only available at discrete points along the wellbore requiring the data to be extrapolated to the missing sections.To accommodate the need for this data early in the project and to circumvent the short comings of core-based information gaps in the wellbore, a cost effective approach that utilizes common wireline data is used to obtain a continuous profile of the pore volume compressibility with depth shortly after wireline logging operations have concluded. The method employs a log-based mechanical property program that simulates triaxial loading to obtain static elastic moduli as well as rock strength. The resulting rock mechanical properties are then converted into their uniaxial strain equivalents and used to determine the pore volume compressibility. The process is repeated for several drawdown stages with the condition that the deformations are contained within elastic limits. This yields the complete reservoir compaction trend as a function of reservoir depletion.The log-based model was recently validated by comparing with lab-derived results from an offset well in deepwater Gulf of Mexico. The results indicate that the uniaxial pore volume compressibility obtained from the log-based method matches well with the results obtained in the laboratory. This fact suggests that the log-based approach should be utilized with a high degree of confidence to determine the PVC in the absence of core data, insufficient depth coverage of the cores, and/or to validate the core results.

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Experimental Determination of Elastic Anisotropy and Biot's Constant in a Saudi Arabian Reservoir Sandstone

Cited by 2 publications

References 9 publications

A new method to determine Biot's coefficients of Bakken samples

A new method to determine Biot's coefficients of Bakken samples

Log-Based Pore Volume Compressibility Prediction—A Deepwater GoM Case Study

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