The use of elastomer additives to solve the problems in oil well cementing has been investigated in recent years by several research groups in the petroleum industry. This study includes the laboratory examination of the effect of elastomer additives on the physical properties of heavy-weight oil well cement. In the research process, a candidate well is selected and the properties of the cement slurry used in a problematic section of the well are tested in the laboratory. Then, elastomer additives are added as an elastic agent and the improvements in the cement slurry and stone properties are studied. This article discusses the problems associated with the conventional heavy-weight oil well cement used in the candidate well and reports the detail of the improvements in cement properties obtained by adding an elastomer additive to the cement slurry formulation as an elastic agent. These properties include cement slurry rheological properties, free water, fluid loss, thickening time, cement stone elasticity properties, and compressive strength. The elastomer additive increases the yield point and plastic viscosity, but it decreases the free water and fluid loss of cement slurry. In addition, the cement stone compressive strength decreases; however, there is an optimum concentration of the elastomer additive at which the maximum compressive strength is reached. Moreover, the elasticity properties of the cement stone are improved and a lower value for the Young’s modulus and a higher value for the Poisson’s ratio are achieved. The theories supporting the results are discussed in the discussion section. The results of this study can be used to optimize the cement slurry design in any given set of conditions.
Boukhelifa L., Moroni N., James S. G., Le Roy-Delage S., et al., “Evaluation of Cement Systems for Oil and Gas Well Zonal Isolation in a Full Scale Annular Geometry,” SPE 87195-MS,Dallas, Texas, 2004.
Bannister C.E., "Evaluation of Cement Fluid Loss Behavior under Dynamic Conditions,” SPE 7592-MS, Houston, Texas, 1978.
Destrade M., Gilchrist M. D., Motherway J., and Murphy J. G., “Slight Compressibility and Sensitivity to Changes in Poisson’s Ratio,” International Journal for Numerical Methods in Engineering, 90, 403-411, 2011.
Fleckenstein W. W., Eustes A. W., Rodriguez W. J., Berger A., et al., “Cemented Casing: the True Stress Picture,” AADE-05-NTCE-14,National Technical Conference and Exhibition, Houston, Texas, 2005.
El-Hassan H., Sultan M., Saeed A. A., Johnson C., et al., ‘Using a Flexible, Expandable Sealant System to Prevent Microannulus Formation in a Gas Well: A Case History,” SPE 92361, SPE Middle East Oil & Gas Conference, Bahrain, 12–15 March, 2005.
Le Roy-Delage S., Baumgarte C., Thiercelin M., and Vidick B., “New Cement Systems for Durable Zonal Isolation,” SPE 59132-MS, IADC/SPE Drilling Conference, New Orleans, Louisiana, USA, 23-25 February, 2000.
Mack J. and Dillenbeck L. R., “Cement: How Tough is Tough enough? A Laboratory and Field Study,” SPE 78712-MS, SPE Eastern Regional Meeting, Lexington, Kentucky, USA., 23-26 October,2002.
Morris W., Criado M. A., Robles J., and Bianchi G., “Design of High Toughness Cement for Effective Long Lasting Well Isolations,” SPE 81001-MS, SPE Latin American and Caribbean Petroleum Engineering Conference, Port-of-Spain, Trinidad and Tobago, 27-30 April, 2003.
Mueller D. T., “Producing Stress-resistant High-temperature/High-pressure Cement Formulations through Microstructural Optimization,” SPE 84562-MS, SPE Annual Technical Conference and Exhibition, Denver, Colorado, USA, 5-8 October, 2003.
Ravi K., Bosma M., and Gastebled O., “Safe and Economic Gas Wells through Cement Design for Life of the Well,” SPE 75700-MS, SPE Gas Technology Symposium, Calgary, Alberta, Canada, 30 April-2 May, 2002.
Yuan Z., Schubert J., Teodoriu C., and Gardoni P., “HPHT Gas Well Cementing Complications and its Effect on Casing Collapse Resistance,” SPE 153986-MS, 28-30 March, Mumbai, India, 2012.
Wray B., Bedford D., Leotaud L., and Hunter B., “The Application of High-Density Elastic Cements to Solve HP/HT Challenges in South Texas: The Success Story,” SPE 122762-MS, SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, USA, 4-7 October, 2009.
Khalaf F. and Cairo U., “Increasing Casing Collapse Resistance against Salt-inducedLoads,” SPE 13712-MS,11-14 March, Bahrain,1985.
“API Recommended Practice for Testing Well Cements,” RP 10B API, Washington, 2010.
Nelson E., GuillotD., Well Cementing, 2nd Ed.,Sugar Land, Tex.: Schlumberger, 2006.
Feder J., “Casing and Cementing,” 3rd Ed., Austin, Texas:The University of Texas at Austin-Petroleum Extension Service, 2001.
Feder J., Well Cementing (Oil and Gas Production), Austin, Texas:The University of Texas at Austin-Petroleum Extension services, 1983.
Rahman S. S., and Chilinggar G. V., “Casing Design: Theory and Practice,” Amsterdam: Elsevier, 1995.
Ravi K., Bosma M., and Hunter L.,“Optimizing the Cement Sheath Design in HPHT Shearwater Field,” SPE 79905-MS, 19-21 February, Amsterdam, Netherlands,2003.