Process for hydraulically fracturing a geological formation along a predetermined direction
US4683950A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1981 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | May 22, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This process comprises positioning along a predetermined direction two walls penetrating a geological formation to be fractured. During a preliminary period a predetermined amount of hydraulic fluid in injected. During a preliminary period/hydraulic fluid is injected simultaneously into both wells during for a sufficient time interval at a pressure insufficient to fracture the formation, either at a substantially constant flow rate, or in a stepwise manner at progressively increasing pressure levels. This preliminary injection is followed by the injection of hydraulic fluid into at least one of the wells at a pressure higher than the pressure of fractuation of the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.