The abnormal log responses to the beds were found after completion of Well M38.The stratigraphic horizons of abnormal intervals have been determined from log correlation and petrographical analyses.

• M38井在完井后发现其水平段异常测井响应特征,随后以测井资料为主要依据展开了一系列分析,通过测井对比及岩相分析落实了异常地层的层位归位问题。