Modelling the Near Wellbore and Formation Damage - A Comprehensive Review of Current and Future Options

Byrne, Michael; Jimenez, Maria Alejandra; Salimi, Siroos

doi:10.2118/144096-ms

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…Parameters and variables such as flow domain, fluid properties, output pressure, etc., are inputted to solve the flow relationships in the software. Using the fundamentals of fluid dynamics and by delineating boundary conditions, COMSOL Multiphysics software solves the numerical variables [3]. Figure 3 shows kerogen content (shown as dark areas) and inorganic constituents (represented in grey color) within the Barnett shale, using SEM imaging (Figure 4).…”

Section: Cfd Modeling Using Sem Techniquementioning

confidence: 99%

Effect of Initial Pressure, Surface, and Outlet Velocity, and Density of Adsorbed Gas on Transport and Production in Shale Gas Reservoirs

Wb¹,

Aminu²

2017

Oil Gas Res

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The recent technological advancements in horizontal drilling and hydraulic fracturing have led to a boom in gas production from unconventional shale gas reservoirs. However, knowledge and technologies required to successfully develop unconventional reservoirs are far beyond what is available in the industry at present. Shale gas reservoirs are extremely heterogeneous with ultra-low permeability and nano-pores. The flow of gas in this reservoir is non-linear, multi-faceted including adsorption/desorption, flow at high and low rates, solid-fluid interactions, etc., which makes it a significant challenge to quantify such flow. A pore-scale flow model was developed using a combination of CFD and COMSOL multi-physics 4.2 based on Darcy and Navier-Stokes equations to describe transport of adsorbed gas and free gas in pore spaces respectively. Parameters such as surface pressure, adsorbed gas density and initial reservoir pressure were used to study shale gas transport. The presence of adsorbed gas within the shale gas reservoir will decrease porosity while increasing total production and gas storage capacity due to the high affinity of surfaces of organic matter to methane found within the shale gas reservoirs and hence high gas-in-place estimates. Moreover, because production from the adsorbed gas phase is dependent on pressure, four different values of initial reservoir pressures were used to analyze the effect of reservoir pressure on flow velocity. It was observed that the higher the initial reservoir pressure, the greater the velocity of the flow and consequently higher production rates.

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Section: Cfd Modeling Using Sem Techniquementioning

confidence: 99%

Effect of Initial Pressure, Surface, and Outlet Velocity, and Density of Adsorbed Gas on Transport and Production in Shale Gas Reservoirs

Wb¹,

Aminu²

2017

Oil Gas Res

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“…CFD has been applied successfully in many industries and recently in the oil and gas industry. Considerable technical papers presented the application of CFD for inflow well performance, formation damage, completion design, fracturing, matrix acidizing and development of inflow control device (ICDs) [3][4][5][6][7][8][9]. This paper is using Comsol package for numerical modeling.…”

Section: Application Of Computational Fluid Dynamic (Cfd)mentioning

confidence: 99%

Insights into the Process of Effectively Acidizing Naturally Fractured Reservoirs

Salimi¹,

Ghalambor

Hayer³

2014

SPE International Symposium and Exhibition on Formation Damage Control

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This paper presents the simulation results of acidizing process in naturally fractured reservoir (NFR) by application of advanced numerical technique. Accurately predicting fracture and matrix flow is often critical to assessing well productivity in naturally fractured reservoirs.Fracturing with acid (usually hydrochloric acid [HCl]) is an alternative to propped fractures in acid-soluble formations such as dolomites and limestones. Computational Fluid Dynamics (CFD) is a computational technology that enables study of the dynamics of materials that flow. The CFD code is used to simulate the fluid flow through the fracture and matrix. The model is based on coupled multiphysics phenomena such as Darcy's law in porous media, reaction flow equation for the fracture and fracture growth by acid dissolution. Reaction flow in the fracture is controlled by diffusion and convection terms. The model simulates the impact of fracture geometry, acid properties, fracture width, matrix permeability on the acidizing process.The results show that diffusion and convection terms will control the transport of acid through the fracture (as there are limits to this process). when the mass transfer coefficient (K g ) is higher than 10e-5 m 2 /sec, the mechansim of acid trasnport will be controlled by convection term on the fracture surface. Physically ,this means that acid transport to wall by diffussion term is negligilble. When the fracture width is higher than 200 micron (0.00002 m), the acid will react with the most of the surface of the fracture and it will be dissolved by acid considerably. The mass transfer coefficient will also play an important role during acidizing process as the results show. The results of this study were used as guidelines to design a more effective acid job by predicting the acid penetration and acid volume for matrix acidizing in naturally fractured reservoirs. Furthermore, the contrasts in job design for lithology of the carbonate formation are also presented.

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Do Advanced Drilling Techniques Really Add Reserves and Enhance Recovery?

Qutob

Retalic

2013

All Days

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With the majority of today's "new" hydrocarbons increasingly found in technically challenging, complex and in many cases lower quality reservoirs, it's long since been agreed there is no more "Easy oil". It's that fact, coupled to the industry wide challenges associated with conventionally drilled wells in mature and depleted reservoirs which have led in recent years to the very significant advances seen in the Advanced Drilling Techniques (ADT) and Technology arena. ADT provides a suite of tools and techniques which have enabled the technical and commercial development of numerous oil and gas reservoirs worldwide which would have not otherwise been exploited. ADT comprises of the following techniques: Managed Pressure DrillingUnderbalanced DrillingCoiled Tubing DrillingThrough Tubing Rotary Drilling (Conventional and HPHT)Subsea Through Tubing Rotary Drilling According to one recent industry report some 67% of the world's daily oil production comes from mature fields, therefore in order to not only sustain but improve upon current production levels, field life extension is not optional but an absolute necessity. Historically however, most Operators due to cost and complexity of well delivery have not fully exploited their mature assets consequently failing to reach their full potential. Therefore, in order to not only sustain but increase current production levels to meet the increasing demands, operating companies must pay greater attention to their mature fields and their resources development options. The above coupled to the fact that in almost every conventional drilling operation there is risk, a potential to; damage well productivity (formation damage), encounter lost circulation; suffer differential sticking and many other related conventional drilling problems any of which can be exaggerated in a mature drilling environment as a function of depletion. Its here, when applied with an expert system for candidate reservoir screening, technique selection and improved reservoir evaluation technologies, ADT provides realizable and available EOR and IOR options in accessing ‘conventionally’ or commercially stranded reserves. Further, when fully coordinated with the neseccary subsurface disciplines an ADT solution will add measurable value by; improving production, enhancing ultimate recoverable reserves, even possibly reduce overall development cost all improving net present values. Popular perception is we need new technology to sustain and drive the industry forward in meeting the global demands placed upon it; in truth if we look; much of the required technology is available now. The thing we, the industry, need most is the opportunity and most importantly the courage to deploy it. This paper will challenge us in our perceptions and highlight how we can mitigate the risk applying smarter drilling options such as those offered by Advanced Drilling Techniques in the hydrocarbon bearing formations.

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Modelling the Near Wellbore and Formation Damage - A Comprehensive Review of Current and Future Options

Cited by 9 publications

References 17 publications

Effect of Initial Pressure, Surface, and Outlet Velocity, and Density of Adsorbed Gas on Transport and Production in Shale Gas Reservoirs

Effect of Initial Pressure, Surface, and Outlet Velocity, and Density of Adsorbed Gas on Transport and Production in Shale Gas Reservoirs

Insights into the Process of Effectively Acidizing Naturally Fractured Reservoirs

Do Advanced Drilling Techniques Really Add Reserves and Enhance Recovery?

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