Wettability alteration from liquid-wetting to intermediate gas-wetting at high temperatures PDF Download

Author: Mashhad M. Fahes
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Abbas Firoozabadi
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

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Wettability alteration to intermediate gas-wetting in porous media by treatment with FC-759, a fluoropolymer polymer, has been studied experimentally. Berea sandstone was used as the main rock sample in our work and its wettability before and after chemical treatment was studied at various temperatures from 25 to 93 C. We also studied recovery performance for both gas/oil and oil/water systems for Berea sandstone before and after wettability alteration by chemical treatment. Our experimental study shows that chemical treatment with FC-759 can result in: (1) wettability alteration from strong liquid-wetting to stable intermediate gas-wetting at room temperature and at elevated temperatures; (2) neutral wetting for gas, oil, and water phases in two-phase flow; (3) significant increase in oil mobility for gas/oil system; and (4) improved recovery behavior for both gas/oil and oil/water systems. This work reveals a potential for field application for improved gas-well deliverability and well injectivity by altering the rock wettability around wellbore in gas condensate reservoirs from strong liquid-wetting to intermediate gas-wetting.

Author:
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Languages : en
Pages : 5

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The authors have performed a number of imbibition tests with the treated and untreated cores in nC10, nC14, and nC16 and a natural gas condensate liquid. Imbibition tests for nC14 and nC16 were also carried out at elevated temperatures of 100 C and 140 C. An experimental polymer synthesized for the purpose of this project was used in core treatment. Imbibition results are very promising and imply liquid condensate mobility enhancement in the treated core. They also performed flow tests to quantify the increase in well deliverability and to simulate flow under realistic field conditions. In the past we have performed extensive testing of wettability alteration in intermediate gas wetting for polymer FC759 at temperatures of 24 C and 90 C. The results were promising for the purpose of gas well deliverability improvement in gas condensate wells. We used FC759 to lower the surface energy of various rocks. The model fluids nC10, and nC14 were used to represent condensate liquid, and air was used as the gas phase. A new (L-16349) polymer, which has been recently synthesized for the purpose of the project, was used in the work to be presented here. L-16349 is a water-soluble fluorochemical polymer, with low order, neutral PH and very low volatile organic compound (VOC

Author: Guancheng Jiang
Publisher: Gulf Professional Publishing
ISBN: 012815151X
Category : Technology & Engineering
Languages : en
Pages : 283

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Gas Wettability of Reservoir Rock Surfaces with Porous Media compiles critical information on this complex topic, thus helping engineers more successfully face technical field challenges in oil and gas recovery. Combining both theoretical and practical knowledge, this concise reference bridges basic concepts with factors affecting gas wettability, also covering polymer-type gas wetting reversal agents in technical detail and discussing gas wettability’s influence on capillary force, oil-water distribution, and gas wettability’s application in petroleum engineering operations from both domestic and international projects. This book delivers the critical concepts, methods, mechanisms and practical technology needed for today’s complex oil and gas assets. Helps readers further develop and improve basic theory on petrophysics and reservoir engineering Covers various aspects, like the developmental history of gas wettability and the concept and evaluation of gas wettability of oil and gas reservoir rock surfaces Creates a bridge between theoretical knowledge and practical application, with content covering new theories, methodologies and the technologies used in drilling, completion and reservoir engineering

Author: Ruth Gabriela Fernandez Martinez
Publisher:
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Category :
Languages : en
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In gas-condensate reservoirs, production rate starts to decrease when retrograde condensation occurs. As the bottomhole pressure drops below the dewpoint, gascondensate and water buildup impede flow of gas to the surface. To stop the impairment of the well, many publications suggest wettability alteration to gas-wetting as a permanent solution to the problem. Previous simulation work suggests an "optimum wetting state" to exist where maximum gas condensate well productivity is reached. This work has direct application in gas-condensate reservoirs, especially in identifying the most effective stimulation treatment which can be designed to provide the optimum wetting conditions in the near-wellbore region. This thesis presents an extensive experimental study on Berea sandstone rocks treated with a fluorinated polymer. Various concentrations of the polymer are investigated to obtain the optimum alteration in wettability to intermediate gas-wet. This wetting condition is achieved with an 8% polymer solution treatment, which yields maximum gas mobility, ultimately increasing the relative permeability curves and allowing enhanced recovery from gas-condensate wells. The treatments are performed mainly at room conditions, and also under high pressure and high temperature, simulating the natural environment of a reservoir. Several experimental techniques are implemented to examine the effect of treatments on wettability. These include flow displacement tests and oil imbibitions. The experimental work took place in the Wettability Research Lab in Texas A & M University at Qatar in Doha, Qatar. The studies in this area are important to improve the productivity of gas-condensate reservoirs where liquid accumulates, decreasing production of the well. Efficiency in the extraction of natural gas is important for the economic and environmental considerations of the oil and gas industry. Wettability alteration is one of the newest stimulation methods proposed by researchers, and shows great potential for future research and field applications.

Author: Laurence S. Romsted
Publisher: CRC Press
ISBN: 1439882967
Category : Science
Languages : en
Pages : 580

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Surfactant research explores the forces responsible for surfactant assembly and the critical industrial, medical, and personal applications, including viscosity control, microelectronics, drug stabilization, drug delivery, cosmetics, enhanced oil recovery, and foods. Surfactant Science and Technology: Retrospects and Prospects, "a Festschrift in ho

Author: John Berg
Publisher: CRC Press
ISBN: 1482277506
Category : Science
Languages : en
Pages : 548

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Presents current knowledge of intermolecular interactions, the dynamics of wetting and the importance of wettability phenomena in processes and products, detailing the considerations required for wettability in multicomponent systems. Underlying theory and experimental methods are described.

Author: Reza Azin
Publisher: Springer Nature
ISBN: 3030772004
Category : Technology & Engineering
Languages : en
Pages : 464

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This book covers different aspects of gas injection, from the classic pressure maintenance operation to enhanced oil recovery (EOR), underground gas storage (UGS), and carbon capture and storage (CCS). The authors detail the unique characteristics and specific criteria of each application, including: material balance equations phase behaviour reservoir engineering well design operating aspects surface facilities environmental issues Examples, data, and simulation codes are provided to enable the reader to gain an in-depth understanding of these applications. Fundamentals and Practical Aspects of Gas Injection will be of use to practising engineers in the fields of reservoir engineering, and enhanced oil recovery. It will also be of interest to researchers, academics, and graduate students working in the field of petroleum engineering.

Author:
Publisher:
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Category : Oil reservoir engineering
Languages : en
Pages : 582

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Author: Abhijit Y. Dandekar
Publisher: CRC Press
ISBN: 1439876363
Category : Technology & Engineering
Languages : en
Pages : 547

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A strong foundation in reservoir rock and fluid properties is the backbone of almost all the activities in the petroleum industry. Suitable for undergraduate students in petroleum engineering, Petroleum Reservoir Rock and Fluid Properties, Second Edition offers a well-balanced, in-depth treatment of the fundamental concepts and practical aspects that encompass this vast discipline. New to the Second Edition Introductions to Stone II three-phase relative permeability model and unconventional oil and gas resources Discussions on low salinity water injection, saturated reservoirs and production trends of five reservoir fluids, impact of mud filtrate invasion and heavy organics on samples, and flow assurance problems due to solid components of petroleum Better plots for determining oil and water Corey exponents from relative permeability data Inclusion of Rachford-Rice flash function, Plateau equation, and skin effect Improved introduction to reservoir rock and fluid properties Practice problems covering porosity, combined matrix-channel and matrix-fracture permeability, radial flow equations, drilling muds on fluid saturation, wettability concepts, three-phase oil relative permeability, petroleum reservoir fluids, various phase behavior concepts, phase behavior of five reservoir fluids, and recombined fluid composition Detailed solved examples on absolute permeability, live reservoir fluid composition, true boiling point extended plus fractions properties, viscosity based on compositional data, and gas-liquid surface tension Accessible to anyone with an engineering background, the text reveals the importance of understanding rock and fluid properties in petroleum engineering. Key literature references, mathematical expressions, and laboratory measurement techniques illustrate the correlations and influence between the various properties. Explaining how to acquire accurate and reliable data, the author describes coring and fluid sampling methods, issues related to handling samples for core analyses, and PVT studies. He also highlights core and phase behavior analysis using laboratory tests and calculations to elucidate a wide range of properties.