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川西白马庙地区上侏罗统蓬莱镇组气藏砂体分布非均匀性强,对砂体的定性描述已经不能满足气田深入开发的要求。地震反演方法近几年广泛应用于储层预测解释,为此选取该区联井地震剖面,开展多种反演方法效果试验,结合已钻井实际资料分析,最后确定选用伽马反演预测蓬莱镇组内部砂体纵向及横向分布,并进一步反演孔隙度,实现了对砂体的定量描述。实践表明,高斯配置协模拟法对于该区块砂岩储层预测效果最佳。
The gas distribution of the Penglaizhen formation of the Upper Jurassic in the Baimamiao area of western Sichuan is very heterogeneous, and the qualitative description of the sand body can no longer meet the requirements of in-depth development of the gas field. In recent years, the seismic inversion method has been widely used in reservoir prediction and interpretation. For this purpose, the cross-well seismic section in this area is selected and various inversion results are tested. Based on the actual data of the drilling wells, the gamma inversion is used to predict Penglai The vertical and horizontal distribution of the sand body in the Zhenzhan Formation and further inversion of the porosity have realized the quantitative description of the sand body. Practice shows that Gauss collocation method is the best for the prediction of sandstone reservoir in this block.