Volume 33 Issue 1
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BU Yvhuan, HOU Xianhai, GUO Shenglai. Study on Low Temperature Cementing Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(1): 79-83. doi: 10.3969/j.issn.1001-5620.2016.01.016
Citation: BU Yvhuan, HOU Xianhai, GUO Shenglai. Study on Low Temperature Cementing Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(1): 79-83. doi: 10.3969/j.issn.1001-5620.2016.01.016
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Study on Low Temperature Cementing Slurry

doi: 10.3969/j.issn.1001-5620.2016.01.016

  • School of Petroleum Engineering, China Petroleum University(East China), Qingdao, Shandong 266580, China

  • Received Date: 2015-10-13
  • Publish Date: 2016-01-30
    Abstract
  • A chlorine-free early-strength agent AA was developed by compounding colloidal SiO2, sulfate and alcohol amine. The development of AA is aimed at solving the troubles existed in cementing low temperature coalbed methane wells and cementing the surface hole section of deep water offshore wells. Effects of AA on the performance of oil well cement were studied. Using XRD and SEM, the hydrate of cement and the functioning mechanism of AA were analyzed. A 1.35-1.87 g/cm3 cement slurry suitable for low temperature well cementing was prepared using light weight material and other additives. Laboratory study shows that AA simultaneouslyaccelerates the hydration of cement clinkers C3S and C2S, and consumes the Ca(OH)2 produced. Pozzlanic reaction between SiO2 and Ca(OH)2 give birth to a C-S-H gel, which fills the pores and spaces formed by cement particles. Early strength of set cement is thus remarkably enhanced. This low temperature cement slurry has 24 h compressive strength of 13 MPa at 30℃, thickening time of 196-258 min, filter loss of 24 mL, free liquid of 0, and mobility greater than 20 cm. Other advantages of this cement slurry include short transient time and gas channeling prevention.

     

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