In the oil and gas production process in deep-water high-temperature–high-pressure (HT–HP) wells, the occurrence of wellhead uplift is often induced by the heat carried by oil and gas flow from the well bottom to the wellhead. This directly leads to the seal failure of wellhead device, causing the great potential safety hazard. Therefore, the wellhead uplift needs to be studied in cementing designing. The calculation model for the wellbore temperature and pressure field as well as the wellhead uplift height was established, we have developed a wellhead uplift experimental device, and experiments for the wellhead uplift under different working conditions were conducted. It was found that the increase of wellbore temperature and trap pressure cause the wellhead uplift, the calculation error of model is less than 10% compared with the experimental data. This could be used to predict the wellhead uplift height under different working conditions. It has certain guiding significance for cementing optimization and improvement of the wellhead integrity.

中文翻译：

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深水井高温高压油气生产井口抬升预测

在深水高温高压（HT-HP）井油气生产过程中，井口隆升的发生往往是由井底油气流向井口携带的热量引起的。这直接导致井口装置密封失效，造成极大的安全隐患。因此，固井设计中需要对井口抬升进行研究。建立了井筒温度、压力场及井口举升高度计算模型，研制了井口举升实验装置，开展了不同工况下井口举升实验。结果表明，井筒温度和圈闭压力的升高导致井口抬升，模型计算误差与实验数据相比小于10%。这可用于预测不同工况下的井口抬升高度。对固井优化、提高井口完整性具有一定的指导意义。