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US 2016/0259088 A1Published application
Estimating Well Production Performance In Fractured Reservoir Systems
AssigneeLandmark Graphics Corporation
InventorsGustavo Carvajal, Vitaly Khoriakov, Andrey Filppov, Marko Maucec, Arturo Diaz, Steven Knabe
Life of this patent
Estimating the term…
Abstract
Systems and methods for estimating well production performance in fractured reservoir systems using real-time down-hole temperature and stress information from advanced monitoring techniques.
Claims20
A method for identifying poor fracture conductivity in fractured reservoir systems to use in refracturing, which comprises:
- a) sampling an average effective fracture length from a distribution of average effective fracture lengths;
- b) selecting current pressure and temperature profiles over a length of each fracture stage;
- c) performing history matching to determine a misfit using the current pressure and temperature profiles, the distribution of average effective fracture lengths, the sampled average effective fracture length and a computer processor;
- d) updating a static well model using the current pressure and temperature profiles, the distribution of average effective fracture lengths and the sampled average effective fracture length for the static well model;
- e) calculating a fracture conductivity for each fracture stage;
- f) selecting pressure and temperature profiles for a predetermined period of time over the length of each fracture stage;
- g) performing history matching using at least one pressure and temperature profile from the pressure and temperature profiles selected for the predetermined period of time, the distribution of any effective fracture lengths, the sampled average effective fracture length and the computer processor;
- h) updating the updated static well model, which represents a new updated static well model, using the at least one pressure and temperature profile from the pressure and temperature profiles selected for the predetermined period of time, the distribution of average effective fracture lengths and the sampled average effective fracture length for the updated static well model;
- i) calculating a Reynolds number for each fracture stage based on the new updated static well model;
- and
- j) identifying each fracture stage with poor fracture conductivity using at least one of the fracture conductivity and the Reynolds number calculated for each fracture stage.
8 more elements
A non-transitory program carrier device tangibly carrying computer-executable instructions for identifying poor fracture conductivity in fractured reservoir systems to use in refracturing, the instructions being executable to implement:
- a) sampling an average effective fracture length from a distribution of average effective fracture lengths;
- b) selecting current pressure and temperature profiles over a length of each fracture stage;
- c) performing history matching to determine a misfit using the current pressure and temperature profiles, the distribution of average effective fracture lengths, the sampled average effective fracture length;
- d) updating a static well model using the current pressure and temperature profiles, the distribution of average effective fracture lengths and the sampled average effective fracture length for the static well model;
- e) calculating a fracture conductivity for each fracture stage;
- f) selecting pressure and temperature profiles for a predetermined period of time over the length of each fracture stage;
- g) performing history matching using at least one pressure and temperature profile from the pressure and temperature profiles selected for the predetermined period of time, the distribution of any effective fracture lengths, the sampled average effective fracture length;
- h) updating the updated static well model, which represents a new updated static well model, using the at least one pressure and temperature profile from the pressure and temperature profiles selected for the predetermined period of time, the distribution of average effective fracture lengths and the sampled average effective fracture length for the updated static well model;
- i) calculating a Reynolds number for each fracture stage based on the new updated static well model;
- and
- j) identifying each fracture stage with poor fracture conductivity using at least one of the fracture conductivity and the Reynolds number calculated for each fracture stage.
8 more elements
A method for identifying poor fracture conductivity in fractured reservoir systems to use in refracturing, which comprises:
- a) selecting acoustic profiles for a predetermined period of time over a length of each fracture stage;
- b) calculating a compressional velocity using at least one of the acoustic profiles;
- c) identifying a main lithology of an acoustic medium represented by the acoustic profiles and a related Gardner coefficient;
- d) calculating an effective stress using the compressional velocity and the Gardner coefficient;
- e) calculating a fracture conductivity for each fracture stage using the effective stress and a computer processor;
- and
- f) identifying each fracture stage with poor fracture conductivity.
4 more elements
A non-transitory program carrier device tangibly carrying computer-executable instructions for identifying poor fracture conductivity in fractured reservoir systems to use in refracturing, the instructions being executable to implement:
- a) selecting acoustic profiles for a predetermined period of time over a length of each fracture stage;
- b) calculating a compressional velocity using at least one of the acoustic profiles;
- c) identifying a main lithology of an acoustic medium represented by the acoustic profiles and a related Gardner coefficient;
- d) calculating an effective stress using the compressional velocity and the Gardner coefficient;
- e) calculating a fracture conductivity for each fracture stage using the effective stress;
- and
- f) identifying each fracture stage with poor fracture conductivity.
4 more elements
Dependencies are inferred from the claim text.