Total Sa

Totalenergies Onetech

UniversitÉ De Pau Et Des Pays De L'adour

Centre National De La Recherche Scientifique

Antoine Jacques

Franck Rey-Bethbeder

Thierry Reess

Justin Martin

Antoine Sylvestre De Ferron

Alain Gibert

Olivier Maurel

Christian LaBorderie

Gilles Pijaudier-Cabot

Pierre Berest

Benoit Brouard

Jean-Luc Boutaud De La Combe

Vincent Jaffrezic

Benoît Brouard

A method for estimating a depth pressure and/or permeability profile of a geological formation having a well extending between a first end and a second end includes equipping the well with an inner tube defining an inner space and an annular space; performing a first well closing phase by injecting a second fluid having a higher viscosity than a first fluid in the well while extracting under a first constant pressure value; performing a second well closing phase by injecting the second fluid while extracting the first fluid under a second constant pressure value, different from the first constant pressure value; and estimating the depth pressure and/or permeability profile of the geological formation based on measurements performed during the first well closing phase and the second well closing phase.

Method and system for estimating a depth pressure and/or permeability profile of a geological formation having a well

A method is provided for fracturing a geological hydrocarbon reservoir, including the static fracturing of the reservoir by hydraulic pressure, and the electrical fracturing of the reservoir by generating an electric arc in a well drilled into the reservoir. This enables the improved fracturing of the reservoir.

Electrical and static fracturing of a reservoir

A device is provided for fracturing a geological hydrocarbon reservoir including two packers defining between them a confined space in a well drilled in the reservoir; a pump for increasing the pressure of a fluid in the confined space; an apparatus for heating the fluid; at least one pair of two electrodes arranged in the confined space; and an electric circuit for generating an electric arc between the two electrodes, the circuit including at least one voltage source connected to the electrodes and an inductance between the voltage source and one of the two electrodes. The device permits improved fracturing of the reservoir.

Electrical fracturing of a reservoir

A well passing through a geological formation is fitted with a tube, open at its bottom end, that is filled with a fluid. Another fluid is in the annular space between the tube and the wall of the well, the two fluids exhibiting an interface situated in the annular space. A hydraulic balance of the fluids of the well is disturbed and the trend of certain quantities is measured. These measurements are moreover simulated by computer by using different sets of values for the physical parameters, and efforts are made to estimate the geological formation. A comparison of the measurements with the simulation results makes it possible to identify an optimum set of values for the parameters.

Method of estimating physical parameters of a geological formation

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Jurancon, France

Antoine Jacques