US 12,631,109 B2Granted

Method and system for estimating a depth injection profile of a well

AssigneeTotalenergies Onetech

InventorsAntoine Jacques, Benoit Brouard, Vincent Jaffrezic

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Abstract

A method for estimating an injection profile in function of the depth of a well include performing, when the well is initially filled with an initial fluid: a well closing phase wherein a first fluid is injected at a first end of the well until said first fluid reaches a second end of the well, said first fluid having a higher viscosity than the initial fluid; and a well opening phase wherein a second fluid is injected at the first end until said second fluid reaches the second end, said first fluid having a higher viscosity than the second fluid. The method further comprises measuring at least one temporal injection profile and estimating the depth injection profile of the well based on the at least one temporal injection profile.

Claims23

Dependent claims

A method for estimating an injection profile in function of the depth of a well, said well being used for reaching a geological formation, the well extending between a first end of the well and a second end of the well, said first end being located towards a surface level of the well, said method comprising:

performing, when the well is initially filled with an initial fluid:
a well closing phase which comprises injecting a first fluid at the first end until said first fluid reaches the second end, such that a first interface between the initial fluid and the first fluid travels from the first end towards the second end such that the well is completely filled with the first fluid and the initial fluid has been completely injected into the geological formation when the first interface reaches the second end, wherein said first fluid has a higher viscosity than the initial fluid;
and
a well opening phase which comprises injecting a second fluid at the first end until said second fluid reaches the second end, such that a second interface between the first fluid and the second fluid travels from the first end towards the second end such that the well is completely filled with the second fluid and the first fluid has been completely injected into the geological formation when the second interface reaches the second end, wherein said first fluid has a higher viscosity than the second fluid;
the method further comprising:
measuring at least one temporal injection profile representative of a variation over time of at least one physical quantity measured at the first end during the well closing phase or the well opening phase;
and
estimating a depth injection profile of the well based on the at least one temporal injection profile.

5 more elements

A system for estimating a depth injection profile of a well, said well being used for reaching a geological formation, the well extending between a first end of the well and a second end of the well, said first end being located towards a surface level of the well, the system comprising:

means configured to perform, when the well is initially filled with an initial fluid:
a well closing phase during which the system injects a first fluid at the first end until said first fluid reaches the second end, such that a first interface between the initial fluid and the first fluid travels from the first end towards the second end such that the well is completely filled with the first fluid and the initial fluid has been completely injected into the geological formation when the first interface reaches the second end, wherein said first fluid has a higher viscosity than the initial fluid;
and
a well opening phase during which the system injects a second fluid at the first end until said second fluid reaches the second end, such that a second interface between the first fluid and the second fluid travels from the first end towards the second end such that the well is completely filled with the second fluid and the first fluid has been completely injected into the geological formation when the second interface reaches the second end, wherein said first fluid has a higher viscosity than the second fluid;
the system further comprising:
means configured to measure at least one temporal injection profile representative of a variation over time of at least one physical quantity measured at the first end during the well closing phase or the well opening phase;
and
means configured to estimate the depth injection profile of the well based on the at least one temporal injection profile.

5 more elements

Dependencies are inferred from the claim text.