Barrels of liquid (typically oil volume). Proportion of the Gross Rock Volume (GRV) that composes the Gas Cap. One relationship published by Peck is shown below with a corresponding relationship between angel of shearing resistance and bulk density. This factor is used to express the expansion of the gas when brought to surface. To try out a fully functional free trail version of this software, please enter your email address below to sign up to our newsletter.
The spreadsheet uses a procedure developed by Bowles based on the Meyerhof and Terzaghi methods to calculate the bearing capacity of the soil from the SPT value. This is called the standard penetration resistance or N number of the soil. HCIIP a function of the Gross Rock volume (GRV) multiplied by the Net to Gross (NTG), Porosity (POR) and Oil or Gas Saturation (Shc). The method is much easier to use than tedious analysis required in commonly used methods. A single formulation is used for static and pseudostatic seismic analyses of active conditions. Unlike the Oil FVF, the inverse value (Gas Expansion Factor) is often used As the units are easier To handle.
The SPT test procedure is detailed in BS 1377 Part 9 or ASTM D-1586. Hence the name STOIIP: Stock Tank Oil Initially In Place when talking about Oil. - Ideal gas law. This done by multiplying NPV (=NRV*POR) with Shc. The HCIIP is an acronym for Hydrocarbons Initially In Place. The International Information Center for Geotechnical Engineers, Soil Liquefaction Analysis Software (NovoLIQ), Designing a Nine-story Residential Building above Subway Tunnels in West Bucharest: Finalist of Bentley Geotechnical Engineering YII 2020 awards, 3D Seepage and Stability Analysis on Oroville Dam, Tallest Earthen Embankment Dam in United States: Finalist of Bentley's YII Geotechnical Engineering Awards, YII 2020 - ACCELERATE Digital Cities Webinar Series: OpenGround, from Ground to Cloud, The Year in Infrastructure 2020: ACCELERATE - Digital Cities Webinar Series, The Year in Infrastructure 2020: ACCELERATE - Design Integration Webinar Series, Finite Element Analysis Shootout: RS2 vs Plaxis vs DIANA, Advantages of pseudo-3D consolidation analysis with SVSOLID, SVFLUX, New freeware on stress and settlement modelling, How to create 3D dykes using SOIVISION 3D extrusion tools.
Stands for Net rock volume and is the volume of rock in the trap above the hydrocarbon water contact with non-reservoir rock discounted.
Several empirical methods have been developed to convert SPT values into allowable bearing pressures.
is an acronym for Hydrocarbons Initially In Place. Alternatively the full CivilWeb Soil Bearing Capacity Calculation Excel Suite including 9 different methods including the SPT value method can be purchased together for just £20. A closed-form expression, as opposed to the constant value commonly used in practice, has been derived for the soil-wall friction angle as a function of the inertial forces and problem geometry for a given pseudostatic acceleration. Units are therefore a ratio of reservoir barrels (bbl) to stocktank barrels (stb). Geoengineer.org uses third party cookies to improve our website and your experience when using it. Million barrels of oil equivalent (combined volume of Oil, Gas or Condensate i.e total hydrocarbon volume). How To Calculate Soil Bearing Capacity And Types Of Bearing Capacity Of The Soil The bearing capacity of soil is defined as the capacity of the soil to bear the loads coming from the foundation. Stands for Hydrocarbon Pore volume and is the volume of oil or gas filled intragranular pores in the trap above the hydrocarbon water contact with non-reservoir rock discounted. This factor is used to express the expansion of the gas when brought to surface. Approximations can however be made and assumptions based on near field analogues.
The CivilWeb Soil Bearing Capacity Calculation from SPT Value XLS Spreadsheet can be used to convert the SPT n value to the bearing capacity of the soil. Solution: Pfluide= Pgauge = rgh. The choice of N value may need to be iterative if the foundation width is adjusted as this will also adjust the influence zone of the foundation. Care must also be taken where there are areas of significantly lower N value below the foundation influence zone as this can lead to higher than expected settlements. The spreadsheet uses a procedure developed by Bowles based on the Meyerhof and Terzaghi methods to calculate the bearing capacity of the soil from the SPT value. These methods were designed to obtain allowable bearing pressures which would limit settlement to a maximum of 25mm, with differential settlement a maximum of 75% of the maximum. The spreadsheet is included in the Soil Bearing Capacity from SI Info Spreadsheet Suite which can be purchased at the bottom of this page for just £10. version removes the file handling capabilities available in the paid (. ) version which allows for the saving, retrieval and export of your analysis. Typically this parameter declines over time, so this figure must represent a typical average over the production life of a field. This done by multiplying GRV with Net to Gross (see below). the % of rock (void space) which can retain a liquid. Pressure drop calculator is suitable for laminar and turbulent flow regime.
The N number can then be converted using empirical methods to an allowable bearing capacity. Recovery efficiency of Gas component measured as a % of Stocktank Volume. i.e rock that fails to meet the criteria is considered 'Non Net' and therefore not part of the resulting STOIIP calculation. 6. Our full Foundation Design Suite includes all 12 of our foundation design spreadsheets for only £50 (80% discount). The pressure which the soil can easily withstand against load is called allowable bearing pressure. The expanded solution is based on the conjugate stress concept, without employing any additional assumptions. F a = resultant force acting on the basement wall (kN) h s = height of backfill soil (m) γ = specific weight of backfill soil (kN/m 3) K = coefficient of earth pressure at rest Oil Formation Volume Factor (FVF) relates to the volume of oil at stock-tank conditions to the volume of oil at elevated pressure and temperature in the reservoir. Proportion of the gas phase that is composed of non salable hydrocarbons, typically inert compounds such as CO2 (Carbon Dioxide), SO2 (Sulphur Dioxide). Used as an easy way to vary the resource calculation i.e. Pipe soil pressure load calculator solving for soil weight pressure given soil unit weight and height from pipe top to ground surface In this case the N value used in the calculations should be adjusted. This is a measure of the amount of Natural Gas Liquids (NGL) that are liberated from a wet gas at surface conditions. The recovery Factor is a last factor that can be used to estimate the recoverable volume of Hydrocarbons but is very much dependent on the development method for the field. The units are therefore a ratio of standard cubic feet of gas (scf) per barrel of oil (bbl). Soil Bearing Capacity Calculation from SPT Value XLS, Soil Bearing Capacity Calculation Excel Suite, Soil Bearing Capacity Calculation Spreadsheet Suite. The app is able to handle separate oil, gas and condensate phases, as well as mixtures of all three including gas caps and oil rims. The volume of oil will therefore shrink slightly after the gas has been liberated. The spreadsheet also includes unique analysis tools which allow the designer to complete a fully optimised bearing capacity calculation in minutes without time consuing iterative hand calculations. In order to ensure that the N values used for design are representative, further adjustments are often required. the maximum GRV of a 4-way closed feature can be entered, and varying spill points can be played with to understand the resulting resource calculation. The zone of soil affected by the foundation is typically taken as between 0.5 x the foundation width above the foundation base to a depth of 2 x the foundation width below the base.
Comparison of the formulation with the widely used Mononobe-Okabe solution revealed a perfect match for the proposed predictions, provided the same soil-wall friction angle is used in both formulations.
Furthermore HCIIP is not the volume of hydrocarbons in the reservoir, but at stock tank (at the surface) conditions. This app calculates hydrocarbon stocktank volumes and recoverable resources for oil fields and exploration prospects. To calculate stock tank conditions the temperature, composition and pressure of the fluids in the reservoir is used to calculate a Formation Volume Factor. All these fractions are used to discount any volume of the GRV that does not add to the Hydrocarbon volume. The exact figure is a direct property of the PVT (Pressure Volume Temperature) componant of the gas and is therefore unique in each case. 'Net to Gross' specifies the amount of Net Rock Volume (NRV) as a proportion (%) of the Gross Rock Volume (GRV). The ideal gas law states that:. You can't use this calculator for compressible gas flow where the pressure of the gas is changing more than 5-10%. The CivilWeb Soil Bearing Capacity Calculation from SPT Value XLS Spreadsheet also includes unique analysis tools which allow the designer to see at a glance exactly what effects different sized foundations will have on the soil bearing capacity allowing an optimised design to be completed easily. For gas the name is just GIIP. These methods were widely used however experimental and field observation data has shown them to be overly conservative (around 50%). = 98 kPa.
=98000+ 101 325 . The inverse of this % is calculated and assumed to hold the hydrocarbon (gas/oil/condensate) componant.
The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel (42 U.S. gallons or 158.9873 litres) of crude oil. Stands for Net Pore volume and is the volume of fluid or gas filled intragranular pores in the trap above the hydrocarbon water contact with non-reservoir rock discounted. Area componant used to calculate the GRV when using the 'Area x Thickness' input method.","Area").
The POR does need to be the average porosity in the net reservoir, usually called PORNET and is somewhere between 0 to 45%. The number of blows to drive the sampler 300mm in to the soil is recorded. In granular soils it can be very difficult to obtain undisturbed samples for testing in a laboratory. Calculation of Bearing Capacity. This is particularly useful for granular soils where undisturbed samples can be difficult to obtain.
Bowles adjusted these methods by 50% to obtain the below equations where qa is the allowable bearing pressure, D is the foundation depth and B is the foundation width; The settlement is assumed to be directly proportional to the bearing pressure. Accounts for the gas shrinkage that occurs through subtraction of the liquid portion. so if you use the app why not pay for it and get all the PRO features!