System and method for performing downhole stimulation operations

Patent metadata

Field	Value
Publication number	US-9135475-B2
Application number	US-201314101028-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Jan 29, 2007
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

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 plurality of stress blocks may then be merged using diversion criterion. The composite quality indicator may be combined with the merged stress blocks 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 defining stages along the combined stress and composite quality indicator based on the diverter-assisted stage classifications; and selectively positioning perforations in select stages based on the diverter-assisted stage 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;
merging a plurality of stress blocks using diversion criterion;
using modeling techniques to combine the composite quality indicator with the merged stress blocks to form a combined stress block and composite quality indicator, the combined stress block and composite quality indicator comprising a plurality of blocks with boundaries therebetween;
defining stages along the combined stress and composite quality indicator based on diverter-assisted stage classifications; and
perforating a wellbore at select stages based on the diverter-assisted stage 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 diverter-assisted stage classifications comprise one of good, bad and combinations thereof.

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

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

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

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

10. The method of claim 1 , wherein the merging further comprises:
creating a plurality of stress blocks;
computing fracture initiation pressure using one or more of well properties, near-wellbore properties and the plurality of stress logs; and
merging fracture initiation blocks using the diversion criterion.

11. The method of claim 10 , wherein the merged stress blocks are the merged fracture initiation blocks.

12. The method of claim 1 , wherein the perforating further comprises selecting positioning the perforations to impart a direction to the fracturing sequence.

13. The method of claim 1 , wherein the perforating further comprises selectively positioning the perforations to fracture stress shadowed regions of the formation.

Assignees

• Schlumberger Technology Corp
• Sclumberger Technology Corp

Inventors

• Lecerf Bruno
• Usoltsev Dmitriy
• Pope Timothy L
• Pena Alejandro
• Itibrout Tarik
• Weng Xiaowei
• Onda Hitoshi
• Enkababian Philippe

Classifications

• G06G7/50 Primary

  for distribution networks, e.g. for fluids (G06G7/62 takes precedence) · CPC title

• E21B43/00 Primary

  Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (applicable only to water E03B) · CPC title

• E21B43/17

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

• E21B43/26

  by forming crevices or fractures · CPC title

• G06F30/00

  Computer-aided design [CAD] · CPC title