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< Natural Gas and Oil > Editorial Department
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Tang Xiaoyong,Pu Liming
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Issue:ISSN 1006-5539
          CN 51-1183/TE

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    Your Position ：Home->Past Journals Catalog->2015 Vol.2

    Treatment of Drilling Fluid Contaminated by Carbonate and Bicarbonate in Deep Drilling and Study on Its Mechanism
    Author of the article:Feng Li, Lei Futao, Zhu Xuefei, Yan Fushou, Huang Nianyi
    Author's Workplace：CNPC Chuanqing Drilling Engineering Co., Ltd., Tarim Engineering Company
    Key Words：Drilling fluid; Contamination; Carbonate; Bicarbonate; Quick lime
    Abstract：When Dafeng Well 1 drilling entered Anjihai layer about 3,000m under the ground, slurry shear viscosity significantly increased and drilling fluid was contaminated by carbonate and bicarbonate. In laboratory experiment, conducted is analysis on drilling fluid filtrate and applied is chemical process to treat carbonate and bicarbonate contamination specifically. Right amount of lime is added and such treating agents are supplemented as RSTF and SP-80, which not only can stabilize performance of drilling fluid, but also save treating agents and reduce drilling costs. Results obtained from performance analysis on drilling fluid added with CSW-1 show that mechanism of drilling fluid contamination by carbonate and bicarbonate is mainly gel structure theory.

     


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