Optimizing matrix acidizing operations
US10047593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2015 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Jul 18, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/255
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In one possible implementation, fresh hydrochloric acid or (partially) spent hydrochloric acid can be pressurized by a pressure source. The pressurized acid from the acid source is injected into a wellbore during an acidizing operation. In addition, a carbon dioxide source may be provided. Acid from the acid source is combined with carbon dioxide from the carbon dioxide source, and the combined acid and carbon dioxide, pressurized by the pressure source, are injected into the wellbore during the acidizing operation. A processor located at the earth's surface or downhole may be provided. The processor can monitor the relative proportions of carbon dioxide and acid in the acid/carbon dioxide combination, as well as the pressure of the acid/carbon dioxide combination at an injection site in the wellbore. Acidizing operation management decisions can be made based on the monitored relative proportions and/or the monitored pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.