Well testing using multiple pressure measurements
AssigneeSchlumberger Technology Corporation
InventorsFikri J. Kuchuk, Terizhandur S. Ramakrishnan, Alpaslan Z. Tengirsek, Ashok K. Belani, Tarek M. Habashy, Adrian Douglas
Life of this patent
Estimating the term…
Abstract
A technique includes measuring a first pressure of well fluid in a first region. The well fluid is produced from a formation into the first region. A second pressure of well fluid is measured in a second region. The second region is isolated from the first region, and the well fluid in the second region is in communication with the formation. characteristics (skin, horizontal permeability or vertical permeability, as examples) of the formation is determined from the first and second measured pressures.
Claims41
A method comprising:
- measuring wellbore pressure in a first region while the fluid is flowing from the formation into the first region;
- measuring wellbore pressure in a second region that is hydraulically isolated from the first region and the wellbore fluid in the second region being in communication with the formation;
- and
- determining characteristics of the formation from the first and second region measured pressures.
A method comprising:
- measuring a first pressure of well fluid in a first region;
- performing an operation in the first region, the operation perturbing a well formation;
- measuring a second pressure of well fluid in a second region, the second region being isolated from the first region and the well fluid in the second region being in communication with the formation;
- and
- regulating the operation based on the measuring of the first and second pressures.
A tool usable in a subterranean well, comprising:
- a first pressure sensor located in a first region of the well;
- a second pressure sensor located in a second region of the well;
- a packer to isolate the first and second regions;
- and
- a circuit to record first measurements by the first pressure sensor made in response to a well fluid in the first region flowing from a formation of the well and record second measurements by the second pressure sensor in response to the well fluid flow from the first region.
A tool usable in a subterranean well, comprising:
- a first pressure sensor located in a first region of the well;
- a second pressure sensor located in a second region of the well;
- a packer to isolate the first and second regions;
- and
- a circuit to communicate first measurements by the first pressure sensor made in response to a well fluid in the first region flowing from a formation of the well to the surface of the well, and communicate second measurements by the second pressure sensor in response to the well fluid flow from the first region to the surface of the well.
A system usable with a subterranean well, comprising:
- a string to be at least partially disposed downhole in the subterranean well;
- a first pressure sensor connected to the string and located in a first region of the well;
- a second pressure sensor connected to the string and located in a second region of the well;
- a packer connected to the string to isolate the first and second regions;
- and
- a circuit connected to the string to record first measurements by the first pressure sensor made in response to a well fluid in the first region flowing from a formation of the well and record second measurements by the second pressure sensor in response to the well fluid flow from the first region.
A system usable with a subterranean well, comprising:
- a string to be at least partially disposed downhole in the subterranean well;
- a first pressure sensor connected to the string and located in a first region of the well;
- a second pressure sensor connected to the string and located in a second region of the well;
- a packer connected to the string to isolate the first and second regions;
- and
- a circuit connected to the string to communicate first measurements by the first pressure sensor made in response to a well fluid in the first region flowing from a formation of the well to the surface of the well, and communicate second measurements by the second pressure sensor in response to the well fluid flow from the first region to the surface of the well.
An article comprising a computer readable storage medium storing instructions to cause a processor to:
- receive at least one measurement of a first pressure of well fluid in a first region of the well, the well fluid in the first region flowing from a formation of the well;
- receive at least one measurement of a second pressure of well fluid in a second region of the well, the second region being isolated from the first region and the well fluid in the second region being in communication with the formation;
- and
- determine characteristics of the formation from the first and second measured pressures.
A tool usable in a subterranean well, comprising:
- a first pressure sensor located in a first region of the well and in hydraulic communication with a formation, the first pressure sensor being adapted to measure a pressure in the first region;
- a second pressure sensor located in a second region of the well and in hydraulic communication with the formation, the second pressure sensor being adapted to measure a pressure in the second region;
- and
- a packer to isolate the first and second regions.
A system usable with a subterranean well, comprising:
- a deep resistivity or induction sonde, or resistivity or induction array
Dependencies are inferred from the claim text.