南海永乐8-3构造在储层压力恢复测试中压力呈下降趋势,缺少反映储层、裂缝渗流特征的关键段、无法利用测试资料对储层进行有效评价。通过构建井筒与地层的瞬态换热模型,分析了关井后井筒内特别是压力计位置与地层中部段的温度场变化,基于温度模型校正了深水潜山储层测试过程中压力计数据,实现了关井压力恢复数据的有效评价。通过对比两井计算结果,表明模型计算误差与实测值误差小于1%,验证了模型计算结果的准确性。建立的关井后井筒温度场分布模型实现了对深水潜山储层测试井温度场的有效预测,为实现关井压力恢复数据的有效评价提供了基础。

The pressure of Yongle 8-3 structure in the South China Sea shows a downward trend in the reservoir pressure recovery test. The key sections reflecting the seepage characteristics of reservoirs and fractures are absent, making it impossible to effectively evaluate the reservoirs using the test data. In this paper, the transient heat transfer model of wellbore and formation is developed to analyze the temperature field changes, especially at the pressure gauge location and the middle section of the formation after the well is shut in. Based on this temperature model, the pressure gauge data from the deepwater buried hill reservoir test are corrected, enabling effective evaluation of the shut-in pressure recovery data. By comparing the calculation results of the two wells, the error between the model calculation error and the measured value is less than 1%, verifying the accuracy of the model calculation results. The developed model of wellbore temperature field distribution after shut-in realizes the effective prediction of the temperature field in the test well of the deepwater buried hill reservoir, thereby providing a basis for the effective evaluation of the shut-in pressure recovery data.