Main controlling factors analysis and reservoir evaluation of Chang-6 tight oil reservoir in Chuankou area

Hydrocarbon enrichment and productivity of Chang-6tight oil reservoir varies greatly in Chuankou area,Honghe oilfield.Through main controlling factors analysis and four properties relationship research,the reservoir evaluation has been re-evaluated.In combination with development status,the main controlling factors are considered to be the followings,namely sedimentary facies,sand thickness,reservoir physical properties and the weathered crust leaching process.Based on the production testing results and logging data,the reservoir lithology and the separate lower limits of the oil-bearing property,the physical property and the electrical property have been determined.The secondary log interpretation models have been established and they are well matched with the situation of each horizon,which plays a guiding role in the comprehensive reservoir evaluation and development deployment in this area.