Volume 38 Issue 4
Jul.  2021
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WANG Jianyao, YANG Kunpeng, MEI Mingjia.The adaptability and application of a water non-dispersible cement slurry[J]. Drilling Fluid & Completion Fluid，2021, 38（4）：499-503 doi: 10.12358/j.issn.1001-5620.2021.04.016
Citation: WANG Jianyao, YANG Kunpeng, MEI Mingjia.The adaptability and application of a water non-dispersible cement slurry[J]. Drilling Fluid & Completion Fluid，2021, 38（4）：499-503 doi: 10.12358/j.issn.1001-5620.2021.04.016
shu

The Adaptability and Application of a Water Non-Dispersible Cement Slurry

doi: 10.12358/j.issn.1001-5620.2021.04.016
  • 1.

    CNPC Tianjin Boxing Engineering Science & Technology Co., Ltd., Tianjin 300451

  • 2.

    CNPC Key Laboratory of Drilling Engineering; Laboratory of Cementing Technology, Tianjin 300451

  • 3.

    National Engineering Laboratory of Petroleum Drilling Technology, Tianjin 300451

  • 4.

    CCDC Changqing Well Cementing Company, Xi’an, Shaanxi 710000

  • Received Date: 2021-03-20
  • Publish Date: 2021-07-31
    Abstract
  • There has long been a water invasion and channeling problem in the water injection blocks and high water cut formations in Changqing oilfield which always happened during and/or after well cementing. To deal with this problem, the field adaptability of the anti-dispersing flocculant BCY-100L was studied taking into account the conditions of field operation. A secondary anti-dispersing agent A was selected through laboratory experiment. Different water non-dispersible cement slurries can be formulated by adding different cement additives to suit different requirements of well cementing. This water non-dispersible cement slurry can maintain its gel structure integrity when water invasion occurs, having outstanding non-dispersing performance and erosion resistance when in contact with water. It is able to resist the invasion of formation water and protect the good bonding at both sides of the cement sheath. This cement slurry has been used twice in wells penetrating water bearing zones, and the pass rate of the quality of the cement sheath with the casing and the borehole wall is 100%, and the high-quality rate of the bonding was 95%. The job quality of the cementing in the water bearing section was increased from 28% to 95%. Field application indicates that this cement slurry has good prospects in cementing wells in water injection area and wells penetrating water bearing formations.

     

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