徐深气田徐深21区块火山岩储层预测与分类

松辽盆地徐深气田徐深21区块火山岩储层地质情况复杂，井间岩性、岩相变化快，储层横向不连续，非均质性强，气水关系极其复杂，常规的地震反演方法不能有效地反映火山岩储层变化特征。采用优选的拟声波重构密度反演和高斯配置协模拟密度反演相结合方案，对该区火山岩储层进行定量预测，预测结果与井对比符合率较高，效果较好。在此基础上根据储层分类标准进行了火山岩储层分类预测，结论认为：徐深21区块火山岩储层类型以Ⅱ、Ⅲ类储层为主，Ⅰ类储层局部发育。

Prediction and classification of volcanic reservoirs in the block Xushen-21 of Xushen gas field

The volcanic reservoirs in the block Xushen 21 of Xushen gas field are characterized by complex geologic conditions, rapid change of interwell lithology and lithofacies, lateral discontinuity, strong heterogeneity, and complicated gas water contact, thus conventional seismic inversion methods cannot effectively capture the changes of the volcanic reservoirs. Two density inversion methodologies of Pseudo acoustic Impedance and Sequential Gaussian Collocated Co simulation (SGCCS) were integrated to quantitatively predict the volcanic reservoirs in the study area. The prediction results match the well data quite well. On the basis of the prediction results, the volcanic reservoirs were classified according to the reservoir classification criteria. It is believed that volcanic reservoirs of type Ⅱ and type Ⅲ predominate in the block Xushen 21, while the reservoirs of type Ⅰare partly distributed.