Simulation of gas transport in tightshale gas reservoirs. Selecting drilling technologies and methods for tight gas. A thesis in petroleum engineering submitted to the graduate faculty of texas tech university in partial fulfillment of the requirements for the degree of master of sciences in petroleum engineering approved. Optimal production strategy for stranded tightgas reservoirs. Multiphase flow in highly fractured shale gas reservoirs.
To evaluate a layered, tight gas reservoir and design the well completion, the operator must use both a reservoir model and a hydraulic fracture propagation model. Reservoir simulation 54 reservoir engineering for geologists was originally published as a fourteenpart series. As the industry looks to increase investment in lower quality tight gas rocks, integrated reservoir modeling studies become increasingly important to understand and improve reservoir management of tight gas fields for optimum depletion planning see, for example, iwere et al. Optimization of infill drilling in naturallyfractured. Pdf a generalized framework model for the simulation of gas.
Usually low solution gas volumes dissolved in these oils pressure drops very quickly. Completed 11 analytical and reservoir simulation studies on bakken. Planar fracture complex fracture networks creating fractures from microseismic data using builder this course will teach attendees how to effectively simulate an unconventional reservoir using gem and successfully apply uncertainty. Geostatistical threedimensional modeling of a tight gas reservoir. Request pdf numerical simulation of gas transport mechanisms in tight shale gas reservoirs due to the nanometer scale pore size and extremely low permeability of a shale matrix, traditional.
Tight gas reservoir is a main type of unconventional gas reservoirs, which is commonly referred to formations with reservoir permeability less than 0. Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also predict the. In rock with permeabilities as little as 1 nanodarcy, reservoir simulation may be economically productive with optimized spacing and completion of staged fractures to maximize yield with respect to cost. Numerical simulation of gas transport mechanisms in tight. Many of the low permeability reservoirs that have been developed in the past are sandstone, but significant quantities of gas are also produced from low permeability carbonates, shales, and coal seams. The rich gas drops out more condensate than the lean gas bottom leftt. Numerical modeling of fractured shalegas and tightgas. A case study of lower permian strata in the southern qinshui basin, china difei zhao. Simulation of gas transport in tightshale gas reservoirs by a multicomponent model based on pebi grid longjun zhang 1, daolun li 1,2, lei wang 3 and detang lu 1. Spe175074ms effect of large capillary pressure on fluid. Introduction webster defines simulate as to assume the appearance of without reality.
Background, base cases, shallow reservoirs, shortterm gas, and water transport pdf 31 pp, 4 mb. Advancing reservoir simulation capabilities for tight gas. Relative permeability plays an essential role for reservoir simulation and production prediction. Gas reservoir management training course petroskills grm. This study investigates, by numerical simulation, gas and water transport between a.
Tight gas is considered an unconventional source of natural gas. Holdaway, louis fabbi, and dan lozie, sas institute inc. Pdf tight gas reservoirs are categorized as unconventional gas reservoirs. Tight gas reservoirs provide almost one quarter of the current u. The economic risk involved in developing a tgs reservoir is much higher than t. Porosity averages from 5 to 10% with permeability between 0. From microseismic to simulation a horn river case study o joint paper with cmg and nexen iptc14940 evaluation in data rich fayatteville shale gas plays integrating physicsbased reservoir simulations with data driven approaches for.
Shale gas and tight oil reservoir simulation request pdf. Its a valuable tool to understand the oil and gas reservoir performance under various operating strategies. Spe member price usd unconventional gas and tight oil exploitation takes an indepth look at unconventional lowpermeability resource accumulations, the required technologies for specialized development, and the assessments currently being applied. Our experience in tight gas research includes characterising gas storage and flow behaviour in tight gas formation rocks characterising permeability and stress relationship and anisotropic permeability reservoir simulation of tight gas production reservoir simulation of gas coproduction from tight sandstone, shale, and coal. Numerical simulation of a tight gas reservoir with multifractured horizontal wells tight gas reservoirs have amounted to almost 50% of the newly proved natural gas. Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also predict the effective range of reservoir and fracture properties. On hydraulic fracturing of tight gas reservoir rock.
The liquid dropout curve assumes the two phases remain in contact with one another. These reservoirs present specific characteristics such as tight reservoir rock with nanodarcy permeability. Geomechanics, petrophysics, production and reservoir engineering expertise for reservoir characterization is combined with a reservoir simulation approach and core analysis experiments to understand the optimum strategy for tight gas development, delivering. Optimizing hydraulic fracturing treatment integrating.
When pressure decreases at reservoir temperature, a rich gas top leftt forms a higher percentage of liquid than a lean gas top rightt. Shale gas and tight oil reservoir simulation delivers the latest research and applications used to better manage and interpret simulating production from shale gas and tight oil reservoirs. Teaches how to perform sensitivity studies, history matching, production forecasts, and economic optimization for shalegas and tightoil reservoirs helps readers investigate data mining techniques, including the introduction of nonparametric smoothing models. Unconventional datadriven methodologies forecast performance in unconventional oil and gas reservoirs keith r. Request pdf on aug 4, 2018, wei yu and others published shale gas and tight oil reservoir simulation find, read and cite all the research you need on researchgate. Schlumberger eclipse suite e100, e300, eadvanced eclipse is an oil and gas reservoir simulator originally developed by ecl exploration consultants limited and currently owned, developed, marketed and maintained by sis formerly known as geoquest, a division of schlumberger. Tight gas reservoirs are generally defined as having less than 0. Shale gas and tight oil reservoir simulation by wei yu. Tight gas unconventional gas reservoir engineering. Production optimization of a tight sandstone gas reservoir. Numerical simulation of the in situ stress in a highrank coal reservoir and its effect on coalbed methane well productivity. Evaluating factors controlling damage and productivity in. Sensor simulates black oil and compositional fluids in singleporosity, dual porosity, and dualpermeability reservoirs.
Recommend best practices for defining and utilizing cutoffs in reservoir engineering calculations and simulation. One of the main characteristics of a tight gas reservoir is the. Production optimization of a tight sandstone gas reservoir with well completions. Numerical simulation of the environmental impact of hydraulic fracturing on tightshale gas reservoirs on nearsurface groundwater.
Abstract as compared to a well in a conventional gas reservoir, a well in a tight gas sand tgs reservoir will have a lower productivity index and a small drainage area. Numerical simulation of the environmental impact of. Identify and model different hydraulic fracture methods, including. The cooperative project involved multidisciplinary reservoir characterization and simulation studies to determine infill well potential in the mesaverde and dakota sandstone formations at selected areas in the san juan basin of northwestern new mexico. Tight gas basics most of us are familiar with traditional tight gas reservoirs clean, low porosity sandstones or siltstones that look unattractive on log analysis, at least by the conventional wisdom of the 1960s.
Optimizing hydraulic fracturing treatment integrating geomechanical analysis and reservoir simulation for a fractured tight gas reservoir, tarim basin, china feng gui, khalil rahman, daniel moos, george vassilellis, chao li, qing liu, fuxiang zhang, jianxin peng, xuefang yuan and guoqing zou additional information is available at the end of the. Shale gas and tight oil reservoir simulation 1st edition pdf version. As the industry looks to increase investment in lower quality tight gas rocks, integrated reservoir modeling studies become increasingly important to understand and improve reservoir management of tight gas fields for optimum depletion planning see, for. Economic production from tight oil formations requires the same hydraulic fracturing and often uses the same horizontal well technology used in the production of shale gas. Crains petrophysical handbook tight gas reservoir analysis. This course will provide participants with an overview of the analysis and development of tight gas reservoirs. Prediction of geomechanical sweet spots in a tight gas sandstone reservoir.
Shale gas and tight oil reservoir simulation 1st edition. Analytical and numerical simulation studies are performed to have a qualitative understanding of damage mechanisms associated with production from nonfractured and hydraulically fractured tight gas reservoirs. Calculation of hydrocarboninplace volume of a gascondensate reservoir from the geologic, reservoir, and production data requires a clear understanding of the behavior of oil and gas under various reservoir and surface operating conditions. This course will cover the evaluation, completion, stimulation, along with the development of tight gas reservoirs. Tarek ahmed, in reservoir engineering handbook fourth edition, 2010. With an author team of 14 subjectmatter experts with specialization in different tight oil and unconventionalgas areas, this new book is an.
You may need a pdf reader to view some of the files on this page. Spe references csugspe 1pp shale gas modeling workflow. New fortran codes have been developed to generate fracture networks, to simulate reservoir drainagerecharge, and to plot the fracture networks and reservoir pressures. Tight gas reservoirs an unconventional natural energy. Prediction of geomechanical sweet spots in a tight gas. Tight gas is natural gas produced from reservoir rocks with such low permeability that massive hydraulic fracturing is necessary to produce the well at economic rates. Gaswater flow behavior in waterbearing tight gas reservoirs. Tight gas is the term commonly used to refer to low permeability reservoirs that produce mainly dry natural gas. While at sahslb he conducted reservoir simulation, gas storage, and tight gas application studies and taught industry short courses in well testing and production data analysis. Pdf the modeling and simulation of tight gas reservoirs. Applicability of existing numerical simulation methodologies to unconventional reservoirs is questionable and requires investigation and. Pdf welltesting challenges in unconventional and tight.
Spe 167711 numerical simulation of low permeability. Emgs mission is to develop stateoftheart reservoir modeling technology and advanced simulation tools for research, teaching, and field application in the area of subsurface energy and natural resources, and environmental science and engineering. They present unique problems to reservoir engineers when applying the. While sometimes called shale oil, tight oil should not be confused with oil shale, which is shale rich in kerogen, or shale oil, which is oil produced from oil shales.