HPHT 101 - What Every Engineer or Geoscientist Should Know about High Pressure High Temperature Wells

Shadravan, Arash; Amani, Mahmood

doi:10.2118/163376-ms

Cited by 82 publications

(45 citation statements)

References 41 publications

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“…The increasing demand in oil and gas and the decline of conventional reservoirs leads to the exploration of reservoirs in greater depths that are characterized by high pressure and high temperature (HPHT) conditions [1,2]. In order to plan and predict the production under these conditions, it is essential to accurately describe the fluid properties of the reservoir fluids, in particular their density and phase behavior.…”

Section: Introductionmentioning

confidence: 99%

Density and phase equilibrium of the binary system methane + n-decane under high temperatures and pressures

Muñiz

Pantelide

Yan

et al. 2016

Fluid Phase Equilibria

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Section: Introductionmentioning

confidence: 99%

Density and phase equilibrium of the binary system methane + n-decane under high temperatures and pressures

Muñiz

Pantelide

Yan

et al. 2016

Fluid Phase Equilibria

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“…Regarding fluid properties, some lines of research of the National Energy Technology Laboratories (NETL) was explained by [62] and the need of a fluid database (oil with other components such as hydrogen sulfide, among others) at high pressure and high temperature. This database will help to evaluate existing correlations and creates new ones.…”

Section: Challenges and Issuesmentioning

confidence: 99%

Prediction of Multiphase Flow in Pipelines: Literature Review

2015

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In this work a review about the most relevant methods found in the literature to model the multiphase flow in pipelines is presented. It includes the traditional simplified and mechanistic models, moreover, principles of the drift flux model and the two fluid model are explained. Even though, it is possible to find several models in the literature, no one is able to reproduce all flow conditions presented in the oil industry. Therefore, some issues reported by different authors related to model validation are here also discussed. ResumenEn este trabajo se presenta una revisión de los métodos más relevantes en la industria del petróleo para modelar el flujo multifásico en tuberías. Se incluyen desde los modelos simplificados hasta los modelos mecanicistas además de explicar los principios de los modelos drift flux y two fluid. Existe una gran cantidad de modelos en la literatura para simular el flujo multifásico en tuberías, empero, ningún modelo es capaz de reproducir todas las condiciones de flujo multifásico presentes en la industria del petróleo. Finalmente, se mencionan algunos temas en los que se requiere más investigación que lleven a simulaciones con resultados más cercanos a los datos de pozos reales.

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“…Most of the wells in that shale play, are not reaching the HPHT conditions but are all subject to stress loading during hydraulic fracturing. The Haynesville Shale, which is located in northwestern Louisiana, is a HPHT shale play with massive production potentials (Shadravan and Amani 2012). It was estimated that it holds four times the reserves of the Barnett.…”

Section: Hydraulic Fracturingmentioning

confidence: 99%

HPHT Cement Sheath Integrity Evaluation Method for Unconventional Wells

Shadravan

Schubert

Amani

et al. 2014

Day 2 Tue, March 18, 2014

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Chances of cement sheath failure increase considerably when the application involves deepwater, high pressure high temperature (HPHT) conditions. Such failures may occur as a result of temperature and pressure-induced stresses created by well events such as hydraulic fracturing, cyclic steam injection, steam assisted gravity drainage (SAGD), production, completion, or other remedial treatments. Thermal and stress cycles could impose the risk of losing zonal isolation and lead to delay in hydrocarbon production.Cement mechanical properties measurment solely would not be sufficient to predict the failure threshold of a cement sheath. Some experimental studies were conducted about the effect of cyclical loading on the integrity of casing and drill strings but less research have been done about the in situ cement sheath integrity under cyclical loading. This paper introduces a new Ultra HPHT experimental set up and an applicable method to evaluate cement sheath integrity under cyclical loading. It also provides insights to find the cement fatigue failure cycle for the set cement at elevated pressures and temperatures.This system was built and completed by benefiting from the capabilities of an extreme HPHT Rheometer. Cement samples could be cured for number of hours in the newly developed HPHT cell and then instantly tested under cyclical loading in various scenarios at high temperatures. The cement sheath fails after a certain number of cycles when reaches its fatigue endurance limit. This research showcases scenarios in which the fatigue failure cycles were identified for 1,000 psi, 2,000 psi and 5,000 psi, pressure differentials between the confining pressure (exposed to outside of the sheath) and the casing pressure. During these experiments, the confining pressure and temperature were held constant at 15,000 psi and 330 ̊ F while the casing pressure varied cyclically between 15,000 psi and 16,000 psi (Set A), 17,000 (Set B) and 20,000 (Set C). A stable chemistry of Class H cement plus 35% silica was used to prevent cement retrogression. Cement sheath failures such as radial cracking, debonding and disking occured due to cyclical loadings. Finally, a fatigue failure envelope was generated by the obtained data. This curve represents the extent of cement sheath endurance at HPHT conditions under cyclical loading.

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HPHT 101 - What Every Engineer or Geoscientist Should Know about High Pressure High Temperature Wells

Cited by 82 publications

References 41 publications

Density and phase equilibrium of the binary system methane + n-decane under high temperatures and pressures

Density and phase equilibrium of the binary system methane + n-decane under high temperatures and pressures

Prediction of Multiphase Flow in Pipelines: Literature Review

HPHT Cement Sheath Integrity Evaluation Method for Unconventional Wells

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