Title: In‐situ hydrocarbon identification and reservoir monitoring using sonic logs, La Cira‐Infantas oil field (Colombia)
Abstract: Summary This paper presents a rock physics model for identifying the quality of rock and pore fluid in a cased hole from dipole sonic data, as well as for monitoring temporal changes in the reservoir from repeated compressional-wave data in the well. By analyzing the Vp/Vs ratio from multi-pole velocity logs in a tertiary fluvial reservoir in La Cira oil field, we differentiated between nonhydrocarbon- and hydrocarbonbearing sands. Comparison of open (1988), cased-hole (1995) compressional sonic logs and production history confirmed these results. This comparison shows a drop in compressional velocity, which corresponds to the producing intervals where gas might have come out of solution. The Vp/Vs ratio as calculated from multi-pole sonic logs is a promising indicator for delineating bypassed oil behind the casing and pay intervals. It can also be used for reservoir depletion monitoring.
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 1
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot