Formation Pressure Determination
AssigneeSchlumberger Technology Corporation
InventorsKeith Pinto, Olivier Marché
Life of this patent
Estimating the term…
Abstract
A method, apparatus, and program product for determining a formation pressure for a reservoir. Measurement data for a pretest of a formation of the reservoir is received. The measurement data is analyzed to determine a last-read event and a corresponding last-read pressure. Derivative data for flow regime identification is determined based at least in part on the measurement data. The derivative data is analyzed to determine a pressure derivative response, and a formation pressure is determined based at least in part on the last-read event, the last-read pressure, and the pressure derivative response.
Claims20
A method of determining a formation pressure for a reservoir, the method comprising:
- receiving measurement data for a pretest of a formation of the reservoir from a data acquisition tool;
- analyzing, with at least one processor of a data processing system, the measurement data to determine a last-read event and a corresponding last-read pressure for the pretest;
- determining, with the at least one processor, derivative data for a flow regime identification based at least in part on the measurement data;
- analyzing, with the at least one processor, the derivative data to determine a pressure derivative response;
- and
- determining, with the at least one processor, the formation pressure for the formation based at least in part on the last-read event, the last-read pressure, and the pressure derivative response.
A data processing system, comprising:
- at least one processor;
- a memory coupled with the at least one processor;
- and
- program code stored on the memory and configured to be executed by the at least one processor to cause the at least one processor to:
- receive measurement data for a pretest of a formation of a reservoir from a data acquisition tool,
- analyze the measurement data to determine a last-read event and a corresponding last-read pressure for the pretest;
- determine derivative data for a flow regime identification based at least in part on the measurement data;
- analyzing the derivative data to determine a pressure derivative response for the pretest;
- and
- determine a formation pressure for the formation based at least in part on the last-read event, the last-read pressure, and the pressure derivative response.
A computer program product comprising:
- a computer readable storage medium;
- and
- program code stored on the computer readable storage medium and configured, upon execution, to cause at least one processor to:
- receive measurement data for a pretest of a formation of a reservoir from a data acquisition tool,
- analyze the measurement data to determine a last-read event and a corresponding last-read pressure for the pretest;
- determine derivative data for a flow regime identification based at least in part on the measurement data;
- analyzing the derivative data to determine a pressure derivative response for the pretest;
- and
- determine a formation pressure for the formation based at least in part on the last-read event, the last-read pressure, and the pressure derivative response.
Dependencies are inferred from the claim text.