Abstract: In view of unclear Permian tectonics in Madong Area and unclear favorable hydrocarbon accumulation zone in the target bed series, a comprehensive geological evaluation method and seismic reservoir prediction technology were used to deepen the study on the tectonics, sedimentation and hydrocarbon accumulation of the Permian Jiamuhe-Xiazijie Formation in Madong Area, the geological characteristics of the Permian volcanic rock reservoir in Madong Area were determined, the favorable evaluation targets of Permian reservoir in Madong Area were optimally selected, and finally the wells were deployed and located. The results of the study presented that there were volcanic rock abnormalities developed on large scale in Well Block MD1 in Madong Area under a background of low convex, and the longitudinal favorable oil-bearing stratum was Permian Jiamuhe Formation, with clear characteristics of volcanic rock abnormalities and favorable accumulation conditions. It was recommended to locate Appraisal Well MD103 in Well Block MD1, which urgently needs to be deployed for drilling to achieve a major breakthrough in Permian Formation in Madong Area. The results of the study were of important guidance and reference significance for the exploration of deep volcanic rock abnormalities in Madong Area.

Key words: Madong Well Block, reservoir, trap group, appraisal well, volcanic body, well deployment