Abstract: Wangji oilfield southwestern margin is an oil bearing block controled by fault and lithology,oil bearing layer is more,oil bearing segment is long,single layer oil bearing thickness is thin,reservoir property is poor.Rock cutting logging show includs fluorescent and oil trace.Mainly consists of fine sandstone,different nature fluid gas logging data difference is bad,gas logging construction is different in middle shallow layer and deep layer,different geochemical content shows abnormally.Based on logging show features and a large number of cross plots chart,abnormal show identification criteria has been established,gas logging,geochemical abnormal display interpretation chart has been established for middle shallow layer and deep layer.Tested with new well,it can meet the requirement of interpretation and evaluation.Especially,the fine interpretation of E Wang 30 well and successful testing provided reference for previously thought dry layer and bad oil layer in H3 segment middle shallow layer.Aiming at the present situation in the study area,most of layers have to go through transform to acquire industrial oil fluid,this article provided suggestion to the option of transformed layer.