Determination of point of sand production initiation in wellbores using residual deformation characteristics and real time monitoring of sand production
US7653488B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2007 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Sep 10, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Predicting sand production in a wellbore. A first set of characteristics is determined for a formation in the wellbore, wherein determining uses a plastic model of the formation, and wherein the first set of characteristics comprises a yield surface, a failure surface, a stress total strain, an elastic strain, and a plastic-strain relationship. A relationship among a second set of characteristics of the wellbore is determined using an effective stress model, wherein the second set comprises a drawdown pressure, a production rate, pore pressure, a temperature and a viscosity of a fluid in the wellbore, a fluid flow pressure in the wellbore, a drag force of fluid flow in the wellbore, and a type of fluid flow in the wellbore. A critical total strain is determined for the formation using the first set of characteristics and the relationship. The critical total strain is calibrated using a thick wall test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.