Tight oil reservoir model
Learn how to apply GEM’s advanced functionality to model shale and/or tight oil and gas. Identify and model different hydraulic fracture methods, including: 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 This chapter introduces numerical model for simulating shale gas and tight oil production by considering multiple physics and uncertain fracture patterns. The approach of local grid refinement is used to model biwing hydraulic fractures or orthogonal fracture networks. The Bakken Field located in North Dakota, is one the most productive tight oil reservoirs in North America. The Bakken formation is composed of shale and dolomite layers. The Middle Bakken and Three Forks layers are the most important because of the reservoir quality and hydrocarbon saturation. We hence present a general compositional model and simulator to investigate the complicated multiphase and multicomponent behaviors during gas injection in tight oil reservoirs. This compositional model is able to account for vital physics in unconventional reservoirs, including nanopore confinement, molecular diffusion, rock-compaction, and non-Darcy flow. 5.2 Model of tight oil reservoirs with natural fractures Many tight reservoirs contain several natural fractures that greatly enhance the flow capacity of the formation. Some natural factures are connected to each other, some are connected with the wellbore, and some are connected with the hydraulic factures. In tight oil reservoir, the flow channel of oil and water is tiny and the boundary layer effect is obvious, resulting in large flow resistance and high threshold pressure gradient. Tight oil is considered to be an “unconventional” reservoir, requiring horizontal wells and massive hydraulic fracture jobs to perform economically. Some siltstones are sufficiently sandy to produce oil in vertical wells, usually after a decent stimulation.
Pembina Cardium Reservoir Properties •Discovered in the 1950’s, first oil in 1957 •Clastic play in muddy/silt/sandy shore-face shelf, •Over 11,500 wells drilled to date •OOIP>8 billion bbl •17% Recovery Factor to date from primary and waterflood, •Abundant cores and multiple vintage log suites Property Value Porosity 12%
5.2 Model of tight oil reservoirs with natural fractures Many tight reservoirs contain several natural fractures that greatly enhance the flow capacity of the formation. Some natural factures are connected to each other, some are connected with the wellbore, and some are connected with the hydraulic factures. 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. 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 The response of existing transient triple-porosity models for fractured horizontal wells do not converge to that of linear dual-porosity model (DPM) in the absence of natural/microfractures (MFs). The main reason is the assumption of sequential-depletion from matrix to MF, and from MF to hydraulic-fractures (HFs). Pembina Cardium Reservoir Properties •Discovered in the 1950’s, first oil in 1957 •Clastic play in muddy/silt/sandy shore-face shelf, •Over 11,500 wells drilled to date •OOIP>8 billion bbl •17% Recovery Factor to date from primary and waterflood, •Abundant cores and multiple vintage log suites Property Value Porosity 12% When there are 500 natural fractures in the model, the cumulative oil and gas production increase by 1.5% and 6.8%, respectively, compared to the non-planar case. As 1,000 natural fractures exist in one set in the model, the cumulative oil and gas production is 2.8% and 11.4% higher, The paper developed a new semianalytical model for multiple-fractured horizontal wells (MFHWs) with stimulated reservoir volume (SRV) in tight oil reservoirs by combining source function theory with boundary element idea. The model is first validated by both analytical and numerical model. Then new type curves are established. Tight oil reservoirs are adjacent to high-quality source rocks, which leads to relatively little difference in hydrocarbon-supply efficiency (Jia et al. 2014). Therefore, comparing with the hydrocarbon-supply mode, reservoir quality is more crucial for the development of tight oil reservoirs.
In tight oil reservoir, the flow channel of oil and water is tiny and the boundary layer effect is obvious, resulting in large flow resistance and high threshold pressure gradient.
29 Mar 2019 Subsequently, a reservoir simulation model of the Bakken tight oil Unconventional reservoirs, including tight oil, shale gas, and tight gas are Purchase Shale Gas and Tight Oil Reservoir Simulation - 1st Edition. Print Book & E-Book. ISBN 9780128138687, 9780128138694.
21 Jan 2016 Tight oil reservoirs are classified by the types of source–reservoir The Arps hyperbolic decline model (Robertson 1988) is used to calculate
In the oil and gas industry, reservoir modeling involves the construction of a computer model of a petroleum reservoir, for the purposes of improving estimation of reserves and making decisions regarding the development of the field, predicting future production, placing additional wells, and evaluating alternative reservoir management scenarios. A reservoir model represents the physical space of the reservoir by an array of discrete cells, delineated by a grid which may be regular or irregular. Course Content. Input shale gas reservoir characteristics (e.g. adsorption and diffusion) Model a dual permeability system with a natural fracture network. Model planar and complex hydraulic fractures. Incorporate microseismic data. Perform sensitivity analyses and history matches for a tight reservoir using CMOST. 5.2 Model of tight oil reservoirs with natural fractures Many tight reservoirs contain several natural fractures that greatly enhance the flow capacity of the formation. Some natural factures are connected to each other, some are connected with the wellbore, and some are connected with the hydraulic factures. 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. 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 The response of existing transient triple-porosity models for fractured horizontal wells do not converge to that of linear dual-porosity model (DPM) in the absence of natural/microfractures (MFs). The main reason is the assumption of sequential-depletion from matrix to MF, and from MF to hydraulic-fractures (HFs). Pembina Cardium Reservoir Properties •Discovered in the 1950’s, first oil in 1957 •Clastic play in muddy/silt/sandy shore-face shelf, •Over 11,500 wells drilled to date •OOIP>8 billion bbl •17% Recovery Factor to date from primary and waterflood, •Abundant cores and multiple vintage log suites Property Value Porosity 12%
5.2 Model of tight oil reservoirs with natural fractures Many tight reservoirs contain several natural fractures that greatly enhance the flow capacity of the formation. Some natural factures are connected to each other, some are connected with the wellbore, and some are connected with the hydraulic factures.
Tight oil and shale gas reservoirs have a significant part of their pore volume occupied by micro (below 2nm) and mesopores (between 2 and 50nm). This kind of 29 Mar 2019 Subsequently, a reservoir simulation model of the Bakken tight oil Unconventional reservoirs, including tight oil, shale gas, and tight gas are Purchase Shale Gas and Tight Oil Reservoir Simulation - 1st Edition. Print Book & E-Book. ISBN 9780128138687, 9780128138694.
This chapter introduces numerical model for simulating shale gas and tight oil production by considering multiple physics and uncertain fracture patterns. The approach of local grid refinement is used to model biwing hydraulic fractures or orthogonal fracture networks. The Bakken Field located in North Dakota, is one the most productive tight oil reservoirs in North America. The Bakken formation is composed of shale and dolomite layers. The Middle Bakken and Three Forks layers are the most important because of the reservoir quality and hydrocarbon saturation. We hence present a general compositional model and simulator to investigate the complicated multiphase and multicomponent behaviors during gas injection in tight oil reservoirs. This compositional model is able to account for vital physics in unconventional reservoirs, including nanopore confinement, molecular diffusion, rock-compaction, and non-Darcy flow. 5.2 Model of tight oil reservoirs with natural fractures Many tight reservoirs contain several natural fractures that greatly enhance the flow capacity of the formation. Some natural factures are connected to each other, some are connected with the wellbore, and some are connected with the hydraulic factures. In tight oil reservoir, the flow channel of oil and water is tiny and the boundary layer effect is obvious, resulting in large flow resistance and high threshold pressure gradient.