Tengiz sour gas injection project

Sabyrzhan Darmentaev, Arailym Yessaliyeva, Aizada Azhigaliyeva, Dave Belanger, Mike Sullivan, Gregory R. King, Tayo Feyijimi, Phil Bateman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

Gas Injection into the Tengiz oilfield began in January 2007 with sweet gas injection as Phase 1 of the SGI pilot project. Phase 2 of the project, sour gas injection, began in October 2007, but was interrupted due to initial injection start up problems. Continuous sour gas injection began in January 2008. As part of the SGI Surveillance Plan, a variety of reservoir measurements are routinely acquired to monitor the progress of the flood. The SGI project has four signposts for success: Compressor reliability. Injectivity, wellbore durability, and reservoir performance. The sour gas compressor at Tengiz was the first of its kind and has had greater than 90% availability when SGP has been operational. Injectivity has exceeded expectations and wellbore durability has also been excellent. The fourth area is reservoir performance and all indications are that the reservoir is performing as expected. The SGI project consists of seven inverted five-spot patterns. To expedite data acquisition, the SGI well patterns were designed to include one "super-spot" pattern (twin injectors 100 m apart providing dedicated injection support to different geologic layers) and three short-spaced producers (producer-injector spacing approximately 1/3 of the standard spacing). Tracers, pulse tests, multiphase meters, gas saturation logging, and production and injection are used to monitor and understand reservoir performance. A specialized simulation model (Monitoring Model) was constructed which uses local grid refinement in the SGI pattern area. On August 22, 2008, gas breakthrough occurred in Well T-318, the first of the short-spaced producers. This breakthrough was predicted with the Monitoring Model. Predictions from Monitoring Model suggest most likely breakthrough is near top of reservoir, and this was substantiated by logs. The gas injection project will continue to be closely monitored to improve our understanding and reservoir forecasts.

Original languageEnglish (US)
Title of host publicationSociety of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010
Pages103-114
Number of pages12
StatePublished - Dec 1 2010
EventSPE Caspian Carbonates Technology Conference 2010 - Atyrau, Kazakhstan
Duration: Nov 8 2010Nov 10 2010

Publication series

NameSociety of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010

Other

OtherSPE Caspian Carbonates Technology Conference 2010
CountryKazakhstan
CityAtyrau
Period11/8/1011/10/10

Fingerprint

Sour gas
gas
Monitoring
Durability
Gas meters
Gas compressors
durability
Compressors
Data acquisition
spacing
monitoring
Gases
Availability
Gas injection (Enhanced recovery)
project
data acquisition
tracer
saturation

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Darmentaev, S., Yessaliyeva, A., Azhigaliyeva, A., Belanger, D., Sullivan, M., King, G. R., ... Bateman, P. (2010). Tengiz sour gas injection project. In Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010 (pp. 103-114). (Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010).
Darmentaev, Sabyrzhan ; Yessaliyeva, Arailym ; Azhigaliyeva, Aizada ; Belanger, Dave ; Sullivan, Mike ; King, Gregory R. ; Feyijimi, Tayo ; Bateman, Phil. / Tengiz sour gas injection project. Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010. 2010. pp. 103-114 (Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010).
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Darmentaev, S, Yessaliyeva, A, Azhigaliyeva, A, Belanger, D, Sullivan, M, King, GR, Feyijimi, T & Bateman, P 2010, Tengiz sour gas injection project. in Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010. Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010, pp. 103-114, SPE Caspian Carbonates Technology Conference 2010, Atyrau, Kazakhstan, 11/8/10.

Tengiz sour gas injection project. / Darmentaev, Sabyrzhan; Yessaliyeva, Arailym; Azhigaliyeva, Aizada; Belanger, Dave; Sullivan, Mike; King, Gregory R.; Feyijimi, Tayo; Bateman, Phil.

Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010. 2010. p. 103-114 (Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Darmentaev S, Yessaliyeva A, Azhigaliyeva A, Belanger D, Sullivan M, King GR et al. Tengiz sour gas injection project. In Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010. 2010. p. 103-114. (Society of Petroleum Engineers - SPE Caspian Carbonates Technology Conference 2010).