US 2020/0370430 A1 · METHODS AND SYSTEMS FOR CHARACTERIZING AND/OR MONITORING WORMHOLE REGIMES IN MATRIX ACIDIZING

Abstract

Methods and systems for designing, monitoring, and/or performing acidizing treatments in subterranean formations are provided. A method comprises: determining a wellbore pressure and a fluid flow distribution for an acidizing fluid introduced into an interval of a well bore penetrating a portion of a subterranean formation; determining an optimum interstitial velocity for the acidizing fluid in the subterranean formation and an interstitial velocity of the acidizing fluid at a tip of a wormhole in the subterranean formation at a first flow rate at each of a plurality of depths; and if the interstitial velocity of the acidizing fluid at the tip of the wormhole is less than the optimum interstitial velocity at one or more of the plurality of depths, identifying a second flow rate for introducing the acidizing fluid into the interval of the well bore that is greater than the first flow rate.

Claims20

Dependent claims

A method comprising:

determining a wellbore pressure and a fluid flow distribution for an acidizing fluid introduced into an interval of a well bore penetrating a portion of a subterranean formation;
determining an optimum interstitial velocity for the acidizing fluid in the subterranean formation and an interstitial velocity of the acidizing fluid at a tip of a wormhole in the subterranean formation at a first flow rate at each of a plurality of depths;
and
if the interstitial velocity of the acidizing fluid at the tip of the wormhole is less than the optimum interstitial velocity or a minimum point of a range of tolerance thereof at one or more of the plurality of depths, identifying a second flow rate for introducing the acidizing fluid into the interval of the well bore that is greater than the first flow rate.

1 more element

A well treatment system, comprising:

a pump subsystem, wherein the pump subsystem is configured to pump an acidizing fluid into a well bore at an initial injection rate;
a plurality of sensors;
a work string, wherein the pump subsystem is coupled to the work string;
one or more sets of packers;
and
an information handling system, wherein the information handling system is communicatively coupled to the pump subsystem and the plurality of sensors, wherein the information handling system is configured to:
receive measurements from the plurality of sensors;
determine a wellbore pressure and a fluid flow distribution for the acidizing fluid introduced into an interval of the well bore penetrating a portion of a subterranean formation;
and
determine an optimum interstitial velocity for the acidizing fluid in the subterranean formation and an interstitial velocity of the acidizing fluid at a tip of a wormhole in the subterranean formation at a first flow rate at each of a plurality of depths.

7 more elements

Dependencies are inferred from the claim text.

Methods and systems for characterizing and/or monitoring wormhole regimes in matrix acidizing

Life of this patent

Methods and systems for characterizing and/or monitoring wormhole regimes in matrix acidizing

Life of this patent

Abstract

Claims20