Methods and systems for determining reservoir properties of subterranean formations
US7272973B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2005 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | May 26, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and systems are provided for evaluating subsurface earth oil and gas formations. More particularly, methods and systems are provided for determining reservoir properties such as reservoir transmissibilities and average reservoir pressures of a formation layer or multiple layers using fracture-injection/falloff test methods. The methods herein may use pressure falloff data generated by the introduction of an injection fluid at a pressure above the formation fracture pressure in conjunction with a fracture-injection/falloff test model to analyze reservoir properties. The fracture-injection/falloff test model recognizes that a new induced fracture creates additional storage volume in the formation and that a fracture-injection/falloff test in a layer may exhibit variable storage during the pressure falloff, and a change in storage may be observed at hydraulic fracture closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.