Granted Patent B2

US 12,467,358 · App. 18/987,466 · Granted Nov 11, 2025

Inventor: Mehdi Ali Pour Kallehbasti (Houston, TX)

Assignee: Halliburton Energy Services, Inc.

E21B49/088

Abstract

Claims (63)

1 . A method for performing a pressure test comprising:

inserting a formation testing tool into a wellbore, wherein the formation testing tool includes:

at least one probe;

a pump disposed within the formation testing tool and connected to the at least one probe by at least one probe channel and at least one fluid passageway; and

at least one stabilizer disposed on an opposite side of the formation testing tool as the at least one probe;

identifying parameters of the formation testing tool;

activating the at least one stabilizer, wherein the at least one stabilizer is activated into a surface of the wellbore;

activating the at least one probe, wherein the at least one probe is activated into a mudcake, wherein the mudcake is disposed on the surface of the wellbore;

activating the pump, wherein a formation fluid is drawn in through the at least one probe into the at least one probe channel and the at least one fluid passageway by the pump and increasing pressure with the at least one fluid passageway;

measuring the pressure in the at least one fluid passageway by a pressure sensor;

performing a first pre-test with the pressure sensor;

measuring a drawdown pressure, wherein the drawdown pressure is a difference between the measured drawdown pressure at a beginning of a drawdown pressure period and at an end of the drawdown pressure period;

measuring a buildup pressure, wherein the buildup pressure is a difference between the measured buildup pressure at a beginning of a buildup pressure period and at an end of the buildup pressure period;

performing an additional pre-test when the drawdown pressure is above the buildup pressure; and

validating a formation flow when the drawdown pressure is equal to the buildup pressure.

2 . The method of claim 1 , wherein a measured pressure obtained at an asymptote of a pressure curve after the buildup pressure corresponds to a formation pore pressure.

3 . The method of claim 2 , wherein the measured pressure obtained at the asymptote of the pressure curve after the buildup pressure is used to calculate formation mobility.

4 . The method of claim 1 , wherein performing the additional pre-test when the drawdown pressure is above the buildup pressure further comprises a formation fluid drawdown flow rate that is different than a formation fluid drawdown flow rate in the first pre-test.

5 . The method of claim 1 , wherein the formation testing tool is disposed on a drill string.

6 . A method for performing a pressure test comprising:

inserting a formation testing tool into a wellbore, wherein the formation testing tool includes:

at least one probe;

a pump disposed within the formation testing tool and connected to the at least one probe by at least one probe channel and at least one fluid passageway; and

at least one stabilizer disposed on an opposite side of the formation testing tool as the at least one probe;

identifying parameters of the formation testing tool;

activating the at least one stabilizer, wherein the at least one stabilizer is activated into a surface of the wellbore;

activating the at least one probe, wherein the at least one probe is activated into a mudcake, wherein the mudcake is disposed on the surface of the wellbore;

activating the pump, wherein a formation fluid is drawn in through the at least one probe into the at least one probe channel and the at least one fluid passageway by the pump and increasing pressure with the at least one fluid passageway;

measuring the pressure in the at least one fluid passageway by a pressure sensor;

performing a first pre-test with the pressure sensor;

measuring a drawdown pressure, wherein the drawdown pressure is a difference between the measured drawdown pressure at a beginning of a drawdown pressure period and at an end of the drawdown pressure period;

measuring a buildup pressure, wherein the buildup pressure is a difference between the measured buildup pressure at a beginning of a buildup pressure period and at an end of the buildup pressure period;

performing an additional pre-test when the drawdown pressure is above the buildup pressure; and

validating a formation flow by comparing stabilized pressure distribution of the two buildup pressures.

7 . The method of claim 6 , wherein the validating is performed based on statistical parameters.

8 . The method of claim 7 , wherein the statistical parameters comprise standard deviation and variance.

9 . The method of claim 6 , wherein performing the additional pre-test when the drawdown pressure is above the buildup pressure comprises a formation fluid drawdown flow rate that is different than a formation fluid drawdown flow rate in the first pre-test.

10 . The method of claim 6 , wherein the formation testing tool is attached to a conveyance.

11 . The method of claim 6 , wherein the formation testing tool is disposed on a drill string.

12 . A method for performing a pressure test comprising:

inserting a formation testing tool into a wellbore, wherein the formation testing tool includes:

at least one probe;

a pump disposed within the formation testing tool and connected to the at least one probe by at least one probe channel and at least one fluid passageway; and

at least one stabilizer disposed on an opposite side of the formation testing tool as the at least one probe;

identifying parameters of the formation testing tool;

activating the at least one stabilizer, wherein the at least one stabilizer is activated into a surface of the wellbore;

activating the at least one probe, wherein the at least one probe is activated into a mudcake, wherein the mudcake is disposed on the surface of the wellbore;

activating the pump, wherein a formation fluid is drawn in through the at least one probe into the at least one probe channel and the at least one fluid passageway by the pump and increasing pressure with the at least one fluid passageway;

measuring the pressure in the at least one fluid passageway by a pressure sensor;

performing a first pre-test with the pressure sensor;

measuring a drawdown pressure and measuring a rate of pressure change during a drawdown period;

measuring a buildup pressure and measuring a rate of pressure change during a buildup period;

performing an additional pre-test when the drawdown pressure is above the buildup pressure;

measuring a drawdown pressure and measuring a rate of pressure change during a second drawdown period; and

validating a formation flow when the rate of pressure change during the first drawdown period is equal to the rate of pressure change during the second drawdown period.

13 . The method of claim 12 , wherein a measured pressure obtained at an asymptote of a pressure curve after the buildup pressure corresponds to a formation pore pressure.

14 . The method of claim 13 , wherein the measured pressure obtained at the asymptote of the pressure curve after the buildup pressure is used to calculate formation mobility.

15 . The method of claim 12 , wherein validating the formation flow is performed by comparing stabilized pressure distribution of two successive buildup pressures.

16 . The method of claim 12 , wherein validating the formation flow is performed based on statistical parameters.

17 . The method of claim 16 , wherein the statistical parameters comprise standard deviation and variance.

18 . The method of claim 12 , wherein the formation testing tool is disposed on a drill string.

19 . The method of claim 12 , wherein performing the additional pre-test when the drawdown pressure is above the buildup pressure comprises a formation fluid drawdown flow rate that is different than a formation fluid drawdown flow rate in the first pre-test.

20 . The method of claim 19 , wherein the formation testing tool is conveyed by a wireline.

Assignments (1)

Continuity (2)

References Cited (28)