基于CAT的水平管油水两相流动成像算法改进  

Modification of Imaging Algorithm for Oil-water Flow in a Horizontal Tube Based on CAT Data

作　　者：董勇[1,2] 郭海敏[3] 李梦霞[2] 张闪[4] 

机构地区：[1]中原石油勘探局采油工程技术研究院博士后站,河南濮阳457001 [2]长江大学地球信息与数学学院,湖北湖北荆州434023 [3]油气资源与勘探技术教育部重点试验室(长江大学),湖北荆州434023 [4]长城钻探工程公司解释研究中心,北京100101

出　　处：《测井技术》2014年第3期262-266,共5页Well Logging Technology

基　　金：国家科技重大专项(2008ZX05020-005);国家自然科学基金项目(61273179);湖北省教育厅重点项目(D20101304);湖北省教育厅科学技术项目(Q20121216)

摘　　要：针对电容阵列测井仪(CAT)水平井油水两相流测井资料,已有的基于高斯权重的改进多相流动成像算法的成像效果严重依赖于数据的来源,对来自某仪器的数据展示出了好的效果,而另外某仪器的数据成像效果很差。分析了已有算法的不足,指出设计成像算法时需要考虑12个探头的响应不一致性,充分考虑流型的特点。给出了水平管及近水平管油水两相流动试验的结论:当总流量不大于300m3/d时,流型是相间界面光滑层流和界面波动层流。对水平井油水两相流动,提出了仅对界面附近区域进行局部插值的成像算法。实测数据的处理结果表明了该算法的有效性、稳定性。It is useful to generate images from logging data of oil-water two-phase flow in horizontal wells obtained by capacitance array tool（CAT）.But the quality of the images come from the existing modified multiphase flow imaging algorithm is closely related to the source of logging data.It is good for data comes from a certain instrument,at the same time,it is bad for data comes from the other one.Firstly,the paper analyzes the shortage of the existing algorithm,the inconsistency of the twelve sensors obtained in CAT and the flow pattern characteristic.The author thinks it should consider these factors when designing imaging algorithm.Then,it introduces the results of oil-water flow experiments in horizontal and nearly horizontal tube.That is,the flow pattern is static flow with smooth interface or wavy interface when the total flow rate is less than 300m3/d.For oil-water two-phase flow in horizontal wells,the paper proposed a new imaging algorithm which is interpolate only in region neighboring interphase interface.The result generated from the practical data indicates that the new algorithm is efficient and stable.

关 键 词：生产测井 油水两相流 流动试验 流型 电容阵列仪 成像算法 

分 类 号：P631.83[天文地球—地质矿产勘探]