深水潜山气井异常压力恢复数据校正方法  

Correction method for abnormal pressure recovery data of deepwater buried hill gas wells

作　　者：辛小军 马少华 徐杨 梁洪波 梁豪 XIN Xiaojun;MA Shaohua;XU Yang;LIANG Hongbo;LIANG Hao(China France Bohai Geoservices Co.,Ltd.,Hainan Branch,Haikou,Hainan 570312,China;CNOOC China Limited,Hainan Branch,Haikou,Hainan 570312,China)

机构地区：[1]中法渤海地质服务有限公司海南分公司,海南海口570312 [2]中海石油(中国)有限公司海南分公司勘探开发部,海南海口570312

出　　处：《油气井测试》2025年第1期1-6,共6页Well Testing

基　　金：国家自然科学基金项目“碳酸盐岩油气藏多物理场耦合系统建模与最优控制研究”(62273060)。

摘　　要：深水潜山气井测试时,部分井层压力恢复测试时压力曲线出现持续下降的异常现象,导致反映储层流动特征的关键段缺失,给储层评价带来了极大困难。通过构建井筒温度场模型和测试管柱伸缩预测模型,实现了关井期间井筒温度场的模拟及管柱伸缩量计算,利用流体密度场、温度场和管柱伸缩量耦合,校正了压力计测试数据。结果显示,关井后井筒温度场变化和管柱收缩是导致压力恢复曲线异常的主要原因,通过压力补偿校正后压恢曲线恢复正常上升趋势,压力双对数曲线能反映地层储层特征,利用该方法实现了X1井测试资料的修正与评价,得到地层压力为29.6 MPa,地层系数为14 910 mD·m,评价结果合理。该方法对深水潜山气藏井下压力恢复曲线的异常资料处理与评价有一定指导意义。During the testing of deep-water buried-hill gas wells,the pressure curve of some wells shows an abnormal phenomenon of continuous decline during the pressure recovery test,which leads to the lack of key sections reflecting the flow characteristics of reservoirs and brings great difficulties to formation evaluation.In this paper,a wellbore temperature field model and a test string expansion prediction model are constructed,the simulation of wellbore temperature field and calculation of string expansion during the shut-in period are realized.Through the coupling of fluid density field,temperature field and string expansion,the pressure gauge test data is corrected.The results shows that the main reasons for the abnormal pressure recovery curve are the changes in wellbore temperature field and the contraction of tubing string after well closure.After pressure compensation correction,the pressure recovery curve returns to a normal upward trend,and the pressure double logarithmic curve can reflect the characteristics of reservoir.This method is used to evaluate the test data of X1 well.The formation pressure is 29.6 MPa and the formation coefficient is 14910 mD·m.The evaluation results are consistent with the actual conditions of formation.The research results have certain guiding significance for the abnormal data processing and evaluation of the downhole pressure recovery curve of deep-water buried gas reservoirs.

关 键 词：深水 潜山储层 气井 压力恢复测试 压力曲线异常 校正方法 测试管柱 流体密度 

分 类 号：TE353[石油与天然气工程—油气田开发工程]