Download or read book Scaled Model Studies of Heavy Oil Recovery Using Horizontal Wells in Heavy Oil Reservoirs written by and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Production of heavy oil is difficult because of high oil viscosities and resultant low oil mobilities, resulting in only 2-10 percent of the oil in place being produced by primary depletion. Thermal methods appear to be economically marginal for reservoirs thinner than 10m, therefore the possibility of waterflooding heavy oil reservoirs was investigated. This report presents the results of a study aimed at scaled model investigation of waterflooding heavy oil reservoirs using horizontal wells with or without a bottom-water zone, and theoretical investigation of the same, to identify different production mechanisms, set screening criteria for target reservoir selection, and develop production strategies.

Download or read book Performance Prediction for Steamflooding Marginal Heavy Oil Reservoirs Using Horizontal Wells written by Luong T. Doan and published by . This book was released on 1996 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling of Horizontal Well Performance in Bottom water Reservoirs with Flow Barrier written by Jing Zhou and published by . This book was released on 2006 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Billions of barrels of light and heavy oil reserves remain trapped in the bottom-water reservoirs. A major problem for developing these reservoirs is that water coning during oil production results in decrease of oil production and increase of water production. In this thesis study, a new method is developed to improve oil production and reduce water production in the bottom-water reservoir by using flow barriers, which are defined as formation regions with low permeabilities underneath the horizontal well trajectory. More specifically, firstly, the effects of flow barriers on the horizontal well performance in the conventional bottom-water reservoir are evaluated by using three-dimensional numerical simulations. The effects of barrier permeability, length, width, and horizontal and vertical positions are comprehensively analyzed when a horizontal well is implemented as a producer. Secondly, combined applications of flow barriers and several oil recovery techniques, i.e., hydraulically fractured horizontal well, small-scale CO2 injection, and gel system injection, are qualitatively simulated to develop heavy oil reservoirs with bottom water. Thirdly, a novel three-dimensional reservoir-scale semi-analytical model is developed to model the horizontal well performance in a heterogeneous reservoir by computing the transient pressure responses and flow characteristics. In this semi-analytical model, the heterogeneous reservoir is subdivided into a number of homogeneous reservoir units and the horizontal well is subdivided into a number of segments. The reservoir unit and well segment are coupled at the interfaces of hydraulic contact. The method of sources and sinks is used to compute the transient pressure in the Laplace domain and the results are inverted numerically by using the Stehfest algorithm. The numerical simulation results show that the presence of the low-permeability barrier underneath the horizontal well delays water breakthrough and reduces water cut. Thus, a higher cumulative oil production and a lower cumulative water production are achieved. It is also found that a slightly permeable barrier is easier to convey the natural driving energy of bottom water than a sealing barrier and that a larger size barrier ensures higher oil recovery. In addition, the detrimental effect of the bottom-water coning can be further alleviated in heavy oil reservoirs by applying the above-mentioned combined applications. On the other hand, the newly proposed semi-analytical model enables the reservoir heterogeneities, e.g., low-permeability regions, to be detected by transient behaviors. The semi-analytical model can also be applied to study the transient behavior of heterogeneous reservoirs with the areal and vertical extent. Furthermore, the three-dimensional display of the flow flux distribution within the reservoir provides a better understanding of the reservoir heterogeneity and connectivity.

Download or read book An Analytical Model for Simulating Heavy Oil Recovery by Cyclic Steam Injection Using Horizontal Wells SUPRI TR 118 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this investigation, existing analytical models for cyclic steam injection and oil recovery are reviewed and a new model is proposed that is applicable to horizontal wells. A new flow equation is developed for oil production during cyclic steaming of horizontal wells. The model accounts for the gravity-drainage of oil along the steam-oil interface and through the steam zone. Oil viscosity, effective permeability, geometry of the heated zone, porosity, mobile oil saturation, and thermal diffusivity of the reservoir influence the flow rate of oil in the model. The change in reservoir temperature with time is also modeled, and it results in the expected decline in oil production rate during the production cycle as the reservoir cools. Wherever appropriate, correlations and incorporated to minimize data requirements. A limited comparison to numerical simulation results agrees well, indicating that essential physics are successfully captured. Cyclic steaming appears to be a systematic met hod for heating a cold reservoir provided that a relatively uniform distribution of steam is obtained along the horizontal well during injection. A sensitivity analysis shows that the process is robust over the range of expected physical parameters.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Studies Focused on the Pore scale Aspects of Heavy Oil and Bitumen Recovery Using the Steam Assisted Gravity Drainage SAGD and Solvent aided SAGD SA SAGD Recovery Processes written by Omidreza Mohammadzadeh Shanehsaz and published by . This book was released on 2012 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing energy consumption and continuous depletion of hydrocarbon reservoirs will result in a conventional oil production peak in the near future. Thus, the gap between the global conventional oil supplies and the required amount of fossil fuel energy will grow. Extensive attempts were made during the last three decades to fill this gap, especially using innovative emerging heavy oil and bitumen production technologies. Most of these recovery methods have been developed in Canada, considering the fact that Canada and Venezuela have the largest deposits of heavy oil and bitumen throughout the world. The horizontal well drilling technology opened a new horizon for the recovery of heavy oil and bitumen. Most of the in-situ recovery techniques, including Steam Assisted Gravity Drainage (SAGD) recovery method, take advantage of horizontal injection and production wells. The vacated pores in the reservoir are filled mainly either with steam or with a mixture of steam and solvent vapour in the case of the SAGD and Solvent Aided SAGD (SA-SAGD) recovery methods, respectively. The use of long horizontal wells combined with the reduced viscosity of the produced oil allows economic production with limited amount of bypassed residual oil in the invaded region. The macro-scale success of the SAGD recovery technique is greatly affected by its pore-scale performance. It is beneficial to understand the pore-level physics of the SAGD process in order to develop mathematical models for simulating field-scale performance.

Download or read book Heavy Oil Production Processes written by James G. Speight and published by Gulf Professional Publishing. This book was released on 2013-03-05 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: As conventional-oil resources are depleted worldwide, vast heavy oil reserves available in various parts of the world become increasingly important as a secure future energy source. Brief but readable, Heavy Oil Production Processes discusses the latest improvements in production processes including; thermal methods (steam floods, cyclic steam stimulation, SAGD) as well as non-thermal methods (cold flow with sand production, cyclic solvent process, VAPEX). The book begins with an overview of the chemistry, engineering, and technology of heavy oil as they evolve into the twenty-first century. The preceding chapters are written to provide a basic understanding of each technology, evolving processes and new processes as well as the various environmental regulations. Clear and rigorous, Heavy Oil Production Processes will prove useful for those scientists and engineers already engaged in fossil fuel science and technology as well as scientists, non-scientists, engineers, and non-engineers who wish to gain a general overview or update of the science and technology of fossil fuels. The not only does the book discuss the production processes but also provides methods which should reduce environmental footprint and improve profitability. - Overview of the chemistry, engineering, and technology of oil sands - Updates on the evolving processes and new processes - Evolving and new environmental regulations regarding oil sands production

Download or read book Proceedings of the International Field Exploration and Development Conference 2019 written by Jia'en Lin and published by Springer Nature. This book was released on 2020-07-11 with total page 3907 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected papers from the 8th International Field Exploration and Development Conference (IFEDC 2019) and addresses a broad range of topics, including: Low Permeability Reservoir, Unconventional Tight & Shale Oil Reservoir, Unconventional Heavy Oil and Coal Bed Gas, Digital and Intelligent Oilfield, Reservoir Dynamic Analysis, Oil and Gas Reservoir Surveillance and Management, Oil and Gas Reservoir Evaluation and Modeling, Drilling and Production Operation, Enhancement of Recovery, Oil and Gas Reservoir Exploration. The conference not only provided a platform to exchange experiences, but also promoted the advancement of scientific research in oil & gas exploration and production. The book is chiefly intended for industry experts, professors, researchers, senior engineers, and enterprise managers.

Download or read book Lab to Field Scale Modeling of Low Temperature Air Injection with Hydrocarbon Solvents for Heavy oil Recovery in Naturally Fractured Reservoirs written by Jose R. Mayorquin-Ruiz and published by . This book was released on 2015 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alternatives for enhanced oil recovery processes in heavy oil containing deep naturally fractured reservoirs (NFR) are limited due to excessive heat losses when steam is injected. Air injection at high temperature oxidation conditions (in-situ combustion) has been considered as an alternative to aqueous based thermal applications. However, its implementation has serious limitations including poor areal distribution of injected air and poor combustion efficiency due to the heterogeneous nature of these reservoirs as well as the safety risk of unconsumed injected oxygen (O2) reaching the production wells. Taking advantage of the low cost and availability of air, one option is to use air at low temperature conditions (low temperature oxidation, LTO) as a pressurizing agent in NFR. Oxygenated compounds are generated at these conditions resulting in oil viscosity increase, reducing fluid mobility. In order to minimize this detrimental effect, a combination of air injection with hydrocarbon solvents can be applied. The objectives of this thesis are to evaluate air injection at LTO conditions in NFR containing heavy oil as a way to improve oil recovery, to clarify the effect of hydrocarbon solvent addition into air on oil recovery and O2 consumption, and to propose optimal conditions (temperature, air/solvent ratio) and implementation strategies for an efficient use of this suggested method. Comprehensive laboratory and numerical simulation studies were conducted to achieve these objectives. Static diffusion experiments--simulating cyclic gas injection (huff-and-puff)--were carried out by soaking heavy oil saturated cores into a reactor filled with gas representing a matrix/fracture system. Oil recovery and O2 consumption were the main parameters assessed and an extensive set of variables including rock type, temperature, fracture volume, solvent type, matrix size, gas injection sequences, and soaking times were studied. From experimental studies, the following conclusions were made: 1.Gas sequence design affects oil recovery, 2.O2 consumption in air cycles is higher after the core is soaked into butane rather than propane, 3.It is beneficial to soak cores in air+C3 mixture rather than pure air or solvent; i.e., lower O2 concentration in produced gas, less solvent usage, higher and faster oil recovery compared to alternate injection of air and C3. Then, core scale numerical simulation models were created for modeling lab experiments for a sensitivity analysis on Air/C3 ratio and matrix size. The results show that the process is extremely sensitive to matrix size and optimization of air injection (assisted by hydrocarbon solvents) can be achieved based on the minimized hydrocarbon solvent for a given matrix size. Additionally, a sensitivity analysis was performed using an up-scaled numerical model to the field scale containing meter-scale matrix blocks. It was observed that oil production mechanisms acting in a matrix block surrounded by gas filling the fractures are predominantly gas-oil gravity drainage, effective diffusion, and voidage replacement of oil by gas. Finally, a numerical simulation sector model of a hypothetical NFR was created and several air-gas injection sequences were analyzed. It was concluded that injection of air (LTO conditions) and propane represents an alternative for heavy oil recovery from NFRs at the field scale, and an optimum production time/soaking time ratio can be obtained for given gas injection sequences (type of gas and injection/soaking durations), temperature, and block sizes.

Download or read book Cold Production of Heavy Oil with Bottom Water written by Wenting Qin and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study proposes a new (non-thermal) technique using Bilateral Water Sink (BWS) wells to develop heavy-oil reservoirs with strong bottom water drive - a problem for the conventional methods where the bottom water invades the wells by coning/cresting and leaves the oil unrecovered. BWS removes water cresting by separating the oil and water production using two (upper - oil and lower - water) parallel lateral sections of the same well so that the oil-water interface remains un-altered and the upper oil inflow is water-free. Reservoir simulation study demonstrates advantage of water-free oil inflow to the well where water drives the oil from the edges of the well drainage area to the well instead of bypassing it at the well. Analytical formulas are derived for critical rates ensuring the water-free oil production using the hodograph method and Dupuit Approximation. The resulting BWS well design model defines production strategy and computes oil recovery. The model is verified theoretically by making predictions for the actual oilfield that show a considerable increase of oil recovery from less than 15 percent for conventional horizontal well to over 40 percent for BWS well.

Download or read book Petroleum Abstracts written by and published by . This book was released on 1996 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Horizontal Well Technology for the Recovery of Heavy Oil Reserves written by Carlos Alberto Prato Zuluaga and published by . This book was released on 1995 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reservoir Simulation of Heavy Oil Recovery by Hot Fluid Injection in Horizontal Wells written by Alexander Nulefac Folefac and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reservoir Simulation of Heavy Oil Recovery by Hot Fluid Injection in Horizontal Wells written by A. N. Folefac and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reservoir Development written by M. Rafiqul Islam and published by Gulf Professional Publishing. This book was released on 2021-12-04 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Oil and Gas Development Series: Reservoir Development delivers research materials and emerging technologies that conform sustainability in today's reservoirs. Starting with a status of technologies available, the reference describes sustainability as it applies to fracturing fluids, particularly within unconventional reservoirs. Basement reservoirs are discussed along with non-energy applications of fluids. Sustainability considerations for reserve predication are covered followed by risk analysis and scaling guidelines for further field development. Rounding out with conclusions and remaining challenges, Sustainable Oil and Gas Development Series: Reservoir Development gives today and future petroleum engineers a focused and balanced path to strengthen sustainability practices. - Gain insight to more environmentally-friendly protocols for both unconventional and basement reservoirs, including non-energy applications of reservoir fluids - Determine more accurate reserves and keep budgets in line while focusing on emission reduction - Learn from a well-known author with extensive experience in both academia and industry

Download or read book Proceedings written by and published by . This book was released on 1991 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economically and Environmentally Sustainable Enhanced Oil Recovery written by M. R. Islam and published by John Wiley & Sons. This book was released on 2020-03-17 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: There have been many books on the topic of Enhanced Oil Recovery (EOR) over the last 100 years. They all, however, focus on how to recover more oil faster, taking a rather myopic approach. The solutions presented all work fantastically in theory and even in the laboratory, but each fails to produce results in the field with long-term success. The petroleum industry is almost resigned to the belief that for an EOR technique to be successful, it must be propped up with public funds or must compromise environmental integrity. In line with modern engineering practices, previous books discuss how existing technologies can be tweaked to accommodate for any shortcomings that just came to light. This book is unlike any other book on the topic of recovery in particular and engineering in general. This groundbreaking volume is a continuation of the author’s and his research group’s work that started publishing on the subject of global sustainability involving energy and the environment, dating back to early 2000s. Starting with a paradigm shift in engineering that involves a long-term focus, rather than looking for short-term solutions, the methods and theories presented here delve into applying green engineering and zero waste principles to EOR. Historically, EOR has received mixed success, mainly because innovations in these disciplines relied heavily on processed materials, which are both uneconomical and toxic to the environment. This book explains how engineers missed entirely the causes of unsustainability in these technologies due to the prevalence of many myths that are embedded in modern engineering. Once these myths are deconstructed, the appropriate technologies emerge and the merits of them both in terms of economic and environmental benefits become clear. The book reveals how previous practices in EOR can be replaced with their sustainable versions while saving in material costs. A number of innovative technologies are introduced that can render well known technologies, such as steam flood, in situ combustion, chemical flooding, and microbial EOR environmentally sustainable and economically attractive. A triple dividend is received once these technologies are applied in otherwise marginal reservoirs, unconventional plays and even abandoned formations. The overall reserve, which reflects recoverable oil with new technologies, goes up drastically. Further benefits are drawn when processes such as value addition of waste material is performed. Overall this book shows how EOR can be rendered green while increasing the profitability. This is in stark contrast to the past practices that considered environmental integrity as a drain on profitability. This book proves that a paradigm shift can turn a “technological disaster” into a technological marvel.