In-situ recovery of heavy-oil from fractured carbonate reservoirs: Optimization of steam-over-solvent injection method

Al-Gosayir, Muhammad; Babadagli, Tayfun; Leung, Juliana Y.; Al-Bahlani, A.M.

doi:10.1016/j.petrol.2015.03.011

Cited by 14 publications

(7 citation statements)

References 34 publications

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“…This method can increase crude oil production, and the optimized process can quickly promote asphalt recovery, showing economic and effective application potential. Based on the laboratory-and fieldscale analysis of heavy oil recovery by the SOS-FR method, Al-Gosayir et al (2015) optimized SOS-FR technology through overall improvements and adjusted the heated steam injection stage, solvent injection stage and low-temperature steam injection stage to improve the profits and efficiency of carbonate reservoir development.…”

Section: Steam-over-solvent Injectionmentioning

confidence: 99%

A review of development methods and EOR technologies for carbonate reservoirs

et al. 2020

Pet. Sci.

177

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Carbonate reservoirs worldwide are complex in structure, diverse in form, and highly heterogeneous. Based on these characteristics, the reservoir stimulation technologies and fluid flow characteristics of carbonate reservoirs are briefly described in this study. The development methods and EOR technologies of carbonate reservoirs are systematically summarized, the relevant mechanisms are analyzed, and the application status of oil fields is catalogued. The challenges in the development of carbonate reservoirs are discussed, and future research directions are explored. In the current development processes of carbonate reservoirs, water flooding and gas flooding remain the primary means but are often prone to channeling problems. Chemical flooding is an effective method of tertiary oil recovery, but the harsh formation conditions require high-performance chemical agents. The application of emerging technologies can enhance the oil recovery efficiency and environmental friendliness to a certain extent, which is welcome in hard-to-recover areas such as heavy oil reservoirs, but the economic cost is often high. In future research on EOR technologies, flow field control and flow channel plugging will be the potential directions of traditional development methods, and the application of nanoparticles will revolutionize the chemical EOR methods. On the basis of diversified reservoir stimulation, combined with a variety of modern data processing schemes, multichannel EOR technologies are being developed to realize the systematic, intelligent, and cost-effective development of carbonate reservoirs.

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Section: Steam-over-solvent Injectionmentioning

confidence: 99%

A review of development methods and EOR technologies for carbonate reservoirs

et al. 2020

Pet. Sci.

177

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“…Where and are the oil and solvent densities. This can be expressed in a dimensionless form by dividing by as in Equation 11and is given by Equation (12). As this study assumes the injection of pure solvent then can also be replaced with .…”

Section: = (4)mentioning

confidence: 99%

“…Since the concept of simultaneous heat and mass diffusion processes has not been considered in fractured reservoirs before, in this study we extend the previous model proposed by Sharifi Due to the cost of solvents the pure hot solvent process is unlikely to be economically viable as a recovery process. It is most likely that in real field applications another fluid will be injected to reduce the volume of solvent required; such as the steam-over-solvent and steam alternating solvent process where steam and solvent are alternatively injected 12,13 . The optimisation algorithm presented in this study could be used to understand the effectiveness of different solvents and required injection temperatures in these scenarios.…”

Section: Introductionmentioning

confidence: 99%

“…A small increase in temperature has the potential to reduce the oil viscosity by several orders of magnitude. , Different methods such as in situ combustion, cyclic steam stimulation, steam-assisted gravity drainage (SAGD), ,, and their derivatives expanding solvent steam-assisted gravity drainage (ES-SAGD), − steam-over-solvent (SOS), steam alternating solvent, and the solvent-aided process (SAP) have demonstrated promising solutions for unlocking and producing heavy oil from clastic reservoirs.…”

Section: Introductionmentioning

confidence: 99%

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Hot Solvent-Assisted Gravity Drainage in Naturally Fractured Heavy Oil Reservoirs: A New Model and Approach to Determine Optimal Solvent Injection Temperature

Sherratt

Haddad

Rafati

2018

Ind. Eng. Chem. Res.

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Hot solvent assisted oil recovery is a low emission-intensity oil recovery method from heavy oil resources. This method is particularly promising for fractured reservoirs where the application of current thermal methods may involve challenges associated with heat loss and early breakthrough. In this study a new model of heat and mass transfer for oil recovery from a single matrix block of a naturally fractured reservoir using a hot miscible solvent is developed. Due to the difference in magnitude between thermal and mass diffusivities, heat diffuses beyond the solvent-oil interface and there is no significant convective heat transfer. This results in a reduction of oil viscosity in the centre of the matrix block and a vertical convective flow pattern instead of parallel to the oil-solvent interface observed during cold solvent injection. Using this model optimisation graphs are developed to perform a fast qualitative assessment of the applicability of a hot solvent assisted gravity drainage process in naturally fractured reservoirs with various parameters without the need of complex simulations and experiments. An algorithm is presented to estimate the recovery time or target injection temperature of potential hot solvent assisted oil recovery processes using these optimisation graphs. This can reduce computational time and provide a quick evaluation of the hot solvent assisted gravity drainage process in naturally fractured heavy oil reservoirs.

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“…Without a doubt, numerical reservoir simulation has become very important for petroleum industry and has been used intensely by the scientific and engineering communities. Reservoir simulation combines physics, mathematics, reservoir engineering and computer programming to develop a tool for predicting hydrocarbon-reservoir performance under various operating conditions (Asibor et al 2013;Al-Gosayir et al 2015;Moradi and Rasaei 2018;Nwachukwu et al 2018). Dumkwu et al (2012) pointed out that this kind of simulation has long become the main asset in decision making, such as estimating reserves, diagnosing and improving the performance of producing reservoirs in the oil and gas industry.…”

Section: Introductionmentioning

confidence: 99%

An OpenMP parallel implementation using a coprocessor for numerical simulation of oil reservoirs

et al. 2019

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The objective of this work is to parallelize, using the Application Programming Interface (API) OpenMP (Open Multi-Processing) and Intel Xeon Phi coprocessor based on Intel Many Integrated Core (MIC) architecture, the numerical method used to solve the algebraic system resulting from the discretization of the differential partial equation (PDE) that describes the single-phase flow in an oil reservoir. The set of governing equations are the continuity equation and the Darcy's law. The Hydraulic Diffusivity Equation (HDE), for the unknown pressure, is obtained from these fundamental equations and it is discretized by means of the Finite Difference Method (FDM) along with a time implicit formulation. Different numerical tests were performed to study the computational efficiency of the parallelized versions of Conjugate Gradient, BiConjugate Gradient and BiConjugate Gradient Stabilized methods. Speedup results were considered to evaluate the performance of the parallel algorithms for the horizontal well simulation case. The methodology also included a sensibility analysis for different production scenarios including variations on the permeability, formation-valuefactor, well length and production rate.

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In-situ recovery of heavy-oil from fractured carbonate reservoirs: Optimization of steam-over-solvent injection method

Cited by 14 publications

References 34 publications

A review of development methods and EOR technologies for carbonate reservoirs

A review of development methods and EOR technologies for carbonate reservoirs

Hot Solvent-Assisted Gravity Drainage in Naturally Fractured Heavy Oil Reservoirs: A New Model and Approach to Determine Optimal Solvent Injection Temperature

An OpenMP parallel implementation using a coprocessor for numerical simulation of oil reservoirs

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