深层高压气井负压验窜测试平均压力恢复速率分布特征分析  

Analysis on distribution characteristics of average pressure recovery rate in negative pressure channeling test for deep high-pressure gas wells

作　　者：徐强 穆耶赛尔·穆拉提 高颂 宋迦南 雷胜林 XU Qiang;MUYESAIER Mulati;GAO Song;SONG Jianan;LEI Shenglin(Exploration and Development Department,PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China)

机构地区：[1]中国石油集团塔里木油田分公司勘探事业部,新疆库尔勒841000

出　　处：《油气井测试》2022年第4期46-53,共8页Well Testing

摘　　要：针对负压验窜测试资料定量评价没有规范的方法、验窜结果量化判定规则尚无相关指标的现状,统计70井次、101支次压力计负压验窜测试资料,以平均压力恢复速率为研究对象,分析其统计分布规律。结果表明,无论以实际关井时间还是等时6h关井时间计算的平均压力恢复速率,按从小到大顺次排列具有明显三个斜率段,拐点值为0.3 MPa/h、0.9 MPa/h,第一斜率段对应的样本占75%以上;对平均压力恢复速率相关影响因素逐一分析,认为平均压力恢复速率大小取决于井底、喇叭口封固质量;以关井6 h的平均压力恢复速率顺次排列的拐点处斜率为临界参数,将负压验窜结果评定为优、合格、差三类。该研究成果为负压验窜测试结果量化评定规则建立提供了实际数据支撑。Currently,there is no standard method for quantitatively evaluating negative pressure channeling test data and no relevant indicators for quantitatively judging channeling results.The data of negative pressure channeling tests with 101 pressure gauges in 70 wells were collected to analyze the distribution of average pressure recovery rate.The results show that the distribution curve of average pressure recovery rate,no matter calculated at the actual shut-in time or the isochronous shut-in time of 6 h,and plotted in an ascending order,contains three obvious slope sections inflecting at 0.3 MPa/h and 0.9 MPa/h.The samples corresponding to the first slope section account for more than 75%.Analysis on the factors influencing average pressure recovery rate reveals that the average pressure recovery rate depends on the cementing quality at the bottom hole and the bell.Taking the slope at the inflection point of the curve of average pressure recovery rate at the shut-in time of 6 h as the critical parameter,the negative pressure channeling results are evaluated as excellent,qualified,and poor.The research results provide practical data support for establishing quantitative evaluation rules for negative pressure channeling test results.

关 键 词：高压气井 负压测试 负压验窜 压力恢复速率 量化规则 分析方法 分布规律 

分 类 号：TE256[石油与天然气工程—油气井工程]