System and method for performing downhole stimulation operations

Patent metadata

Field	Value
Publication number	US-9556720-B2
Application number	US-201113338732-A
Country	US
Kind code	B2
Filing date	Dec 28, 2011
Priority date	Jan 29, 2007
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A system and method for performing stimulation operations at a wellsite having a subterranean formation with of a reservoir therein is provided. The method involves generating a plurality of quality indicators from a plurality of logs, and combining the plurality of quality indicators to form a composite quality indicator. The composite quality indicator may be combined with a stress log to form a combined stress and composite quality indicator, the combined stress and composite quality indicator comprising a plurality of blocks with boundaries therebetween. The method may further comprise identifying classifications for the plurality of blocks; defining stages along the combined stress and composite quality indicator based on the classifications; and selectively positioning perforations in select stages based on the classifications thereon.

First claim

What is claimed is:

1. A method for staging a stimulation operation for a wellsite having a reservoir positioned in a subterranean formation, comprising:
generating from measured wellsite data, a plurality of quality indicators from a plurality of logs;
using modeling techniques to combine the plurality of quality indicators to form a composite quality indicator;
using modeling techniques to combine the composite quality indicator with a stress log to form a combined stress and composite quality indicator, the combined stress and composite quality indicator comprising a plurality of blocks with boundaries therebetween;
identifying classifications for the plurality of blocks;
defining stages along the combined stress and composite quality indicator based on the classifications; and
perforating a wellbore at select stages based on the classifications thereon.

2. The method of claim 1 , wherein the generating comprises measuring downhole parameters with a downhole tool positioned in a wellbore at the wellsite.

3. The method of claim 1 , wherein the generating comprises generating a reservoir quality indicator by combining a plurality of reservoir logs and generating a completions quality indicator by combining a plurality of completions logs.

4. The method of claim 3 , wherein the plurality of reservoir logs and the plurality of completions logs comprise a plurality of resistivity logs, permittivity logs, productions logs and combinations thereof.

5. The method of claim 1 , wherein the classifications comprise one of good, bad and combinations thereof.

6. The method of claim 1 , further comprising selectively adjusting the boundaries.

7. The method of claim 6 , wherein the selectively adjusting comprises selectively eliminating the plurality of blocks that are less than a minimum stage length.

8. The method of claim 6 , wherein the selectively adjusting comprises splitting the plurality of blocks having a length greater than a maximum stage length.

9. The method of claim 6 , wherein the selectively adjusting comprises selectively shifting boundaries based on the classifications.

Assignees

• Onda Hitoshi
• Ganguly Utpal
• Weng Xiaowei
• Schlumberger Technology Corp

Inventors

• Onda Hitoshi
• Ganguly Utpal
• Weng Xiaowei

Classifications

• E21B43/25 Primary

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• E21B43/17

  Interconnecting two or more wells by fracturing or otherwise attacking the formation ({E21B43/2405,} E21B43/247 take precedence) · CPC title

• E21B49/00

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title

• E21B43/26 Primary

  by forming crevices or fractures · CPC title

• E21B44/00 Primary

  Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions · CPC title