Determination of stimulated reservoir volume and estimated ultimate recovery of hydrocarbons for unconventional reservoirs
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United States of America Patent
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Jul 18, 2023
Grant Date -
Jul 14, 2022
app pub date -
Jan 8, 2021
filing date -
Jan 8, 2021
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Abstract
A method for determining SRV and EUR includes: monitoring an amount and a density of a hydrocarbon fluid produced from the production well; obtaining a cumulative amount of the fluid that has accumulated from a beginning of production; obtaining a relationship between the cumulative amount and a square root of the time; determining a deviation point where the relationship changes from linear to non-linear; determining a deviation amount of the fluid corresponding to the deviation point; determining a first density of the hydrocarbon fluid at the beginning of production, a second density at a pore pressure equal to a bottom hole pressure in the production well, a first porosity at the beginning of production, and a second porosity for a pore pressure equal to the bottom hole pressure; and determining SRV and the EUR based on the deviation amount, the first and second densities, and the first and second porosities.
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