升平气田火山岩储层储集空间特征研究

升平气田火山岩储层具有良好的天然气勘探潜力,是今后大庆油田深层天然气勘探的主要区域。通过大量的薄片资料、压汞资料,对火山岩储层的储集空间和孔隙结构进行了详细研究。研究结果表明:该区火山岩储层主要发育气孔型、孔隙型、裂缝-孔隙型三种孔隙类型;从储集空间和孔隙连通情况来看,气孔型最好,孔隙型一般,裂缝-孔隙型最差;根据压汞资料可以将火山岩储层分为4大类6个小类,其中具有粗态型和偏粗态型孔隙结构的储层最好,主要发育在气孔流纹岩、溶结凝灰岩中。

A Study on Reservoir Space in the Volcanic Reservoirs of Shengping Gas Field

The volcanic reservoirs of Shengping gas field has a good potential for gas exploration,and it will be the main area of deep gas exploration in Daqing in the near future.Through a large number of thin section identification data and mercury injection data,reservoir space and pore structures of the volcanic reservoir have been studied in detail.The result showed that the main volcanic reservoir of this area had developed three types of pore combination,specifically,stomata type,pore type and fractured pore type.Judging from reservoir space and pore connectivity,the stomata type is the best,and fractured porous type is the worst.According to mercury injection data,the volcanic reservoir of Shengping can be divided into four types,which can be subdivided into six classes.Among the four major categories,the rough state and coarse state are the best reservoirs,which developed in stomata rhyolite and dissolved tuff.