Simulating downhole flow through a perforation

• US 9,995,136 B2
• Filed: 01/27/2016
• Issued: 06/12/2018
• Est. Priority Date: 05/06/2010
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Brooks, James E., Haggerty, Dennis
• Primary Examiner(s): Fitzgerald, John
• Assistant Examiner(s): Frank, Rodney T
• Application Number:
  US15/008,068
• Publication Number:
  US 20160138394A1
• Time in Patent Office: 867 Days
• Field of Search: 7315207
• CPC Class Codes: E21B 43/11 Perforators; Permeators
• CPC Class Codes: E21B 49/02 by mechanically taking samples of the soil
• CPC Class Codes: G01V 11/002 Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant means for transmitting well survey signals E21B47/12; signal transmission systems in general G08C; transmission in general H04B

Abstract

A perforation test target is provided. The perforation test target includes a metal plate and a core sample adhered to the metal plate at one end. The perforation test target further including a first sleeve adhered to the core sample, where a flow impedance of each of a plurality of portions of the first sleeve is based on a predetermined impedance map.

Claims

1. A perforation test target, comprising:

a metal plate;

a core sample adhered to the metal plate at one end; and

a first sleeve adhered to the core sample, wherein the first sleeve is configured to transform a constant surface fluid pressure incident on an outside of the first sleeve to a non-constant fluid pressure distribution on a surface of the core sample when fluid is flowing.

2. The perforation test target of claim 1, further comprising a cap portion engaging an end of the core sample opposite the metal plate, wherein a flow impedance of the cap portion varies from a center of the cap portion to an edge of the cap portion.

3. The perforation test target of claim 1, wherein an impedance of the first sleeve varies only in the axial direction.

4. The perforation test target of claim 1, wherein the first sleeve comprises a sheet rolled about the core sample.

5. The perforation test target of claim 4, wherein a ratio of a major radius of the core sample to a minor radius of the core sample is between about 1.1 and about 2.

6. The perforation test target of claim 4, wherein a flow impedance of the first sleeve varies only in an axial direction.