Analysis and assessment of accumulation condition in Hangjinqi exploration area in Ordos basin

In Hanjinqi exploration area,the geological condition is special,structure is relatively complex,trap types is various.Accumulation conditions and trap types of different tectonic units,different zones and different layers varied.According to characteristics of structural divisions,geological conditions and trap types,the study area is divided into six zones:Shiguhao zone,Shilijiahan zone,Xinzhao zone,Haoraozhao zone,Azhen zone and Gongkahan zone.Based on the zone division,combined with source rock conditions,exploration results,development situation,reserve base,gas- bearing layers,burial depth,we carried out assessment selection and put forward different ideas and strategies for exploration.Evaluation showed that Shiguhao zone of north fault gas layer buried relatively shallow,the exploration degree is relatively high,oil and gas reserves is more practical,multilayer gas reservoir had laminated development,which made it preferred target area;Shilijiahan and Xinzhao zone of the south fault is located in Yishan slope,Tianhuan syncline,source rock developed,oil and gas accumulated,lithologic traps developed with wide gas area and large reserves,which is favorable in the following exploration and development.