Reservoir monitoring

US6645769B2 · kind B2 · utility

Assignee

• Sinvent AS · NO

Inventors

• Davoud Tayebi · Trondheim, NO
• Lars Kilaas · Trondheim, NO
• Are Lund · Trondheim, NO
• Arne Lund Kvernheim · Nesoddtangen, NO
• Odd Ivar Eriksen · Oslo, NO
• Jostein Sveen · Trondheim, NO
• Ole Bernt Lile · Trondheim, NO
• Marit Valeur Ramstad · Trondheim, NO
• Ole Widar Saastad · Oslo, NO

Key dates

• Filing date: Nov 29, 2000
• Grant date: Nov 11, 2003
• Expiry date: Dec 4, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/13
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for monitoring hydrocarbon and water production from different production zones/sections in a hydrocarbon reservoir and/or injection wells and detection of different phenomena such as e.g. local variations in pH, salinity, hydrocarbon composition, temperature, pressure, microorganisms, and the difference between production of formation and/or injection water from various zones/sections. The method includes dividing regions around wells in the reservoir into a number of zones/sections, and injecting or placing specific tracers with unique characteristics for each zone/section into the formation in these regions such that tracers are placed as integrated parts of the well completion or placed and immobilized in these regions through injection, squeeze or by other techniques. The tracers can also be immobilized or placed on a filter, a casing or other constructions surrounding the well in each zone/section. The tracers are specific or introduced to give specific information from each zone/section. The method further includes chemically immobilizing or integrating the tracers in the formation or constructions or filters around the wells, the tracers (tracer carriers) being che…