Volume 37 Issue 6
Dec.  2020
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ZHANG Hong, YANG Yan, YU Wenyan, LI Lukuan, ZHANG Xingguo. A Cementing Slurry Used in Alternating Ultra-High Temperatures[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(6): 771-776. doi: 10.3969/j.issn.1001-5620.2020.06.016
Citation: ZHANG Hong, YANG Yan, YU Wenyan, LI Lukuan, ZHANG Xingguo. A Cementing Slurry Used in Alternating Ultra-High Temperatures[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(6): 771-776. doi: 10.3969/j.issn.1001-5620.2020.06.016
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A Cementing Slurry Used in Alternating Ultra-High Temperatures

doi: 10.3969/j.issn.1001-5620.2020.06.016

  • 1. State Key Laboratory of Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu 610500;

  • 2. Research Institute of Drilling and Production Technology, Jidong Oilfield, CNPC, Tangshan, Hebei 063004

  • Received Date: 2020-09-12
  • Publish Date: 2020-12-28
    Abstract
  • Alternating ultra-high temperatures in heavy oil thermal producers have significant effects on the mechanical performance of set cement. In developing a high temperature cement slurry, XRD, TG nitrogen adsorption and SEM were used to study the effects of metakaolin and graphite on the compressive strength of set cement, the chemical structure and micro-structure of the hydration products of the cement under alternating ultra-high temperatures. The study showed that alternating ultra-high temperature can change the pattern of the C-S-H bonds of a sand-contained set cement from “chain” or “network” to “particle”, thereby damaging the structure integrity and reducing the compressive strength of the set cement. After blended with metakaolin and graphite, the set sand-contained set cement has its ability to resist alternating ultra-high temperature improved, and the metakaolin and graphite have only minor effects on the phase composition of the set cement. The metakaolin has particle filling effect and volcanic ash effect, the graphite has good bonding with the cement body; these two factors help enhance the structural integrity and mechanical property of the set cement in two dimensions. All these research findings have provided references to the performance evaluation and composition optimization of cement slurries for heavy oil thermal producers.

     

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