Transient pressure data analysis to determine contributing inflow control devices

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• receiving transient pressure data from a permanent downhole monitoring system (PDHMS) in a wellbore, wherein the transient pressure data is a function of time, wherein a plurality of inflow control devices (ICDs) are installed in the wellbore, wherein the plurality of ICDs include a plurality of contributing ICDs that contribute to fluid flow in the wellbore, and wherein n is a total number of the plurality of ICDs;
• performing curve fitting of m composite exponential signals to match the transient pressure data, wherein m is less than or equal to n, and wherein m is determined during the curve fitting;
• determining, based on a result of performing the curve fitting of the m composite exponential signals to match the transient pressure data, a total number of the plurality of contributing ICDs in the plurality of ICDs;
• determining, based on the total number of the plurality of contributing ICDs, a respective normalized distance between each pair of adjacent ICDs of the plurality of contributing ICDs;
• determining a depth of a last ICD in the plurality of contributing ICDs based on the determined respective normalized distance between each pair of adjacent ICDs of the plurality of contributing ICDs;
• determining, based on the determination of the depth of the last ICD, one or more ICDs in the plurality of ICDs that contribute to the fluid flow of the wellbore;
• and
• performing production logging operations of the wellbore using the plurality of candidate ICDs.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• receiving transient pressure data from a permanent downhole monitoring system (PDHMS) in a wellbore, wherein the transient pressure data is a function of time, wherein a plurality of inflow control devices (ICDs) are installed in the wellbore, wherein the plurality of ICDs include a plurality of contributing ICDs that contribute to fluid flow in the wellbore, and wherein n is a total number of the plurality of ICDs;
• performing curve fitting of m composite exponential signals to match the transient pressure data, wherein m is less than or equal to n, and wherein m is determined during the curve fitting;
• determining, based on a result of performing the curve fitting of the m composite exponential signals to match the transient pressure data, a total number of the plurality of contributing ICDs in the plurality of ICDs;
• determining, based on the total number of the plurality of contributing ICDs, a respective normalized distance between each pair of adjacent ICDs of the plurality of contributing ICDs;
• determining a depth of a last ICD in the plurality of contributing ICDs based on the determined respective normalized distance between each pair of adjacent ICDs of the plurality of contributing ICDs;
• determining, based on the determination of the depth of the last ICD, one or more ICDs in the plurality of ICDs that contribute to the fluid flow of the wellbore;
• and
• performing production logging operations of the wellbore using the plurality of candidate ICDs.