微测井时深关系质量控制方法研究

微测井是目前公认的精度最高的表层调查方法,其主要作用是宏观下的质控建模及静校正各方法应用精度的量化检验。在野外施工时,往往会遇到如电缆堆积等问题,使微测井的时深关系出现异常点,影响表层建模精度。本方法在不改变原微测井观测方式基础上,增加中远偏移距接收点记录,依据井中激发点之间的旅行时初至时差关系,准确判定出波阻抗界面位置,保证了微测井采集的可靠性。此方法在准噶尔盆地不同表层介质条件下进行测试和应用,均获得良好效果。

Research on Quality Control Method of Time-Depth Relation in Uphole Survey

Uphole survey is a optimum accuracy method on surface survey. Uphole survey can control the quality of surface model macroscopically, and inspect the accuracy of other static methods.On field,there are some problems such as cable stack to produce suspicious interpret points in uphole data.These problems can reduce precision of surface model. New method can recognize the top boundary of high velocity layer by the difference of first break of different borehole receivers and shots.The method don't change conventional uphole survey method,only adds middle and far distance receivers from well points.The method increases reliability of uphole survey.Application and test of the method in different surface conditions in Junggar basin achieve good results.