Volume 37 Issue 2
Apr.  2020
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2020  >  37(2): 202-208
LIU Huibin, LI Jianhua, PANG Heshan, ZHENG Huikai, LIU Dongqing, SUN Xinghua, SONG Weibin. Ultra-high Temperature Cement Slurry for Cementing Well GR1 Penetrating Hot Dry Rock Formations in Gonghe Basin, Qinghai[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(2): 202-208. doi: 10.3969/j.issn.1001-5620.2020.02.012
Citation: LIU Huibin, LI Jianhua, PANG Heshan, ZHENG Huikai, LIU Dongqing, SUN Xinghua, SONG Weibin. Ultra-high Temperature Cement Slurry for Cementing Well GR1 Penetrating Hot Dry Rock Formations in Gonghe Basin, Qinghai[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(2): 202-208. doi: 10.3969/j.issn.1001-5620.2020.02.012
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Ultra-high Temperature Cement Slurry for Cementing Well GR1 Penetrating Hot Dry Rock Formations in Gonghe Basin, Qinghai

doi: 10.3969/j.issn.1001-5620.2020.02.012

  • 1. Cementing Technical Center of Shengli Petroleum Engineering Limited Corporation of SINOPEC, Dongying, Shandong 257064;

  • 2. Tianjin Bo-Xing Engineering Science and Technology Limited Company of CPOE, Tianjin, 300451;

  • 3. CCDC Changqing Well Cementing Company, Xi'an, Shannxi 710018

  • Received Date: 2019-11-24
  • Publish Date: 2020-04-28
    Abstract
  • The job quality of well cementing is the key factor affecting the borehole quality of a well penetrating hot dry rock formations. The major technical difficulties in cementing the wells penetrating hot dry rock formations in the Gonghe Basin in Qinghai were determined by studying the geological characteristics and the conditions for the hot dry rock to exist. An ultra-high temperature cement slurry for cementing the wells was formulated with a high temperature retarder BCR-320L and a high temperature filter loss reducer BXF-200L (AF), based on the investigation of strength decline mechanisms of the set cement with different concentrations of silica powder. Laboratory experimental results showed that the cement slurry can be used to cement wells at circulation temperature of 200℃. The cement slurry has good rheology and adjustable thickening time. The strength of the set cement does not decline at 200℃, and the compressive strength of the cement slurry after aging 72 h is 44.1 MPa. This cement slurry has been successfully used in cementing the well GR1 which penetrated hot dry rock formations in the Gonghe Basin in Qinghai. The quality of the cementing job was excellent. This cementing technology has provided a reference for subsequent hot dry rock well cementing.

     

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