petak, 20 okt 2017

Baner
Baner
Baner

 

 

Original scientific paper
UDC: 691.54:624.153.7
DOI: 10.7251/afts.2014.0610.065B
COBISS.RS-ID: 4226328



 

STRESS CHANGES IN CEMENTED BOREHOLE ANNULUS

 

Bošković Zvonimir1, Čebašek Vladimir1

1 Rudarsko-geološki fakultet, Beograd, E-mail: Ova adresa el. pošte zaštićena je od spam napada, treba omogućiti JavaSkript da biste je videli

 

 

ABSTRACT  Full text (pdf)

SUMMARY

Cemented boreholes annulus its stability achieved tightness must be maintained in the continuation phase of drilling, is that in the process of drilling, cementing, production. Preserving stability in the working life of the wells threatened and technological stage of the production process due to the natural development of conditioned stress-laden formation (swelling) and a reduction of fluid volume in the reservoir and operational procedures (from moderate to high pressures and temperatures, as well as - technical interventions (changes type of working fluid, leaking  testing, perforating, injection, hydraulic fracturing, other operations).  From cement  mixture composition  depend on the mechanical properties of hardened cement stone. Increase elasticity is associated with a reduction in the compressive strength and must always check that the compressive strength of cement stone ensure the stability of pipes due to well working life.

Key words: borehole, cement stone, stress state, finite element method
 

LITERATURE

[1]

Brady, B. H. G., Brown, E. T. (1985). Rock mechanics for underground mining. London. Allen and Unwin.

[2]

Bošković, Z. (2006). Optimizacija procesa cementacije eksploatacionih kolona zaštitnih cevi dubokih bušotina u jugoistočnom delu Panonskog basena. Beograd. Doktorska disertacija.

[3]

Hoek, E. (2000-2009). Toronto. Phase2 Tutorials, Rocscience Inc.

[4]

Ravi, K. et al. „A comparative study of mechanical properties  of density-reduced cement compositions“, SPE 90068

[5]

Butsch, R.J., Morris, C.W., Wydrinski, R., and Kasecky, M.J. „The evolution of specialized cements”, SPE 76713, Z., Svrkota, I. (2003). Caving of coal roof - the most important phase of coal seam excavation. Bor. Journal of Mining Engineering No. 1-2/2003.

[6]

Thiercelin, M., Dargsud, B., Baret,  J.F., and Rodrigez, W.J. (1997). Cement design based on cement mechanical response, paper SPE 52890 pressented at the SPE Annual technical conference and exhibition, San Antonio, Texas, USA, 5-8.

[7]

American Petroleum Institute. API Specification Practice 10 B. Recommended practice for testing well cements 22nd edition, december 1997.

[8]

Baumgarte, C., Thiercerin, M. and Klaus, D. (1999). Case studies of expanding cement to prevent microannular formation, SPE 56535 presented at the SPE Annual Technical Conference and Exhibition in Houston- Oct 3-6.
 

 

 

 

 

  

  

  

  

  

  

 

   

 
Copyright Tehnički institut Bijeljina, 2010.
Web dizajn : Stanko Zarić

uređuje: www.asteh.com