Evaluation of Production Effect and Analysis of Production Potential of Tight Sandstone Gas Reservoir in the Late Stage of Stable Production:A Case Study of Shan 2 Gas Reservoir,Zizhou Gas Field
Taking Shan 2 gas reservoir of Zizhou gas field as an example,the production effect and potential of Shan 2 tight sandstone gas reservoir were evaluated in detail by using the calculation and analysis of geological reserves,dynamic reserves,cumulative gas production,cumulative water production and dynamic reserves to static reserves ratio.The results show that the plane production of Shan 2 gas reservoir is seriously unbalanced.Among the 7 well areas,Yu 30 well area in the middle of the main sand body zone has the best production effect,which belongs to Class Ⅰ production areas.Zhou 3 well area in the south of the main sand body and Yu 81 well area in the north of the main sand body have medium production effects,which belongs to Class Ⅱ production areas.The production effects of Yu 69,Yu 48,Qilin Gou and Yu 29 wells around the main sand body are poor,and they belong to Class Ⅲ production areas.It is preliminarily predicted that the overall production potential of Shan 2 gas reservoir is 198.1 × 108 m3.Among them,the production potential of Class Ⅲ areas is 174.7 × 108 m3,accounting for 88.2％,which is the focus of the follow-up potential exploration of Shan 2 gas reservoir.
tight sandstone gas reservoirlate stabilization periodproducing conditionpotential of productionShan 2 gas reservoir in Zizhou gas field
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