南海深水超深水常用钻井液流变参数通用预测模型
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1.中海石油中国有限公司海南分公司 海口;2.中国石油大学华东 青岛

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TE52

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国家重点研发计划课题(2022YFC2806504);国家自然科学基金面上项目(52274020);国家自然科学基金联合基金重点项目(U21B2069)


A New Model for Predicting Rheological Parameters of Drilling Fluid Suitable for Deep and Ultra-deep Water Drilling in the South China Sea
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CNOOC China Limited, Hainan Branch

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    摘要:

    钻井液的流变参数对于精准预测深水、超深水井钻井水力参数具有重要影响。本文开展了南海深水常用HEM钻井液和合成基钻井液在4到210℃、30到180MPa条件下的流变实验,揭示了大温压范围内表观粘度、塑性粘度及动切力等流变参数随温压的变化规律;基于实验数据对比评价了已有九种流变模型,发现罗斯模型适用于合成基钻井液、赫巴模型适用于HEM钻井液选,在此基础上创建了一种适用于高低温、高低压交变,HEM和合成基钻井液的流变参数通用预测模型,最大误差11.95%、平均误差为0.62%,均优于已有模型;在使用HEM钻井液时计算井底压力误差为0.28%,在使用合成基钻井液时计算井底压力误差为0.181%,可满足南海深水钻井要求。

    Abstract:

    The rheological parameters of drilling fluid have an important impact on accurately predicting the hydraulic parameters of deepwater and ultra-deepwater drilling wells. In this paper, rheological experiments were carried out on commonly used HEM drilling fluids and synthetic-based drilling fluids in the deep waters of the South China Sea under conditions of 4 to 210℃ and 30 to 180MPa. The variation laws of rheological parameters such as apparent viscosity, plastic viscosity, and dynamic shear stress with temperature and pressure were revealed in a wide range of temperature and pressure. Based on the experimental data, nine existing rheological models were compared and evaluated. It was found that the Ross model is suitable for synthetic-based drilling fluid, and the Herschel-Bulkley model is suitable for HEM drilling fluid. On this basis, a general predictive model for rheological parameters of HEM and synthetic-based drilling fluids was created, which is applicable to alternating high and low temperatures, high and low pressures. The maximum error of this model is 11.95%, with an average error of 0.62%, which is better than existing models.The bottom hole pressure error is 0.28% when using HEM drilling fluid and 0.181% when using synthetic drilling fluid, which can meet the requirement of deep water drilling in South China Sea.

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陈浩东,罗鸣,马传华,等. 南海深水超深水常用钻井液流变参数通用预测模型[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-04-25
  • 最后修改日期:2024-05-27
  • 录用日期:2024-06-05
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