磁震协模拟反演预测车排子火成岩储层

An Application of Cosimulation Inversion by Integrating Magnetic Data with Seismic Data in the Prediction of Carboniferous Volcanic Reservoir in Chepaizi Area

准噶尔盆地车排子地区石炭系地层火成岩储层发育,受火成岩岩性及埋深的影响,该区火成岩储层的地震反射特征以弱反射—空白反射、杂乱反射为主,仅利用地震资料预测储层难度较大。而磁法勘探在识别火成岩岩相及岩性方面具有较大的优势。利用三维地震数据的空间结构优势结合磁力数据的优势开展磁震联合协模拟反演,期望获得三维地震格架约束下的连续分布的三维磁力数据体,进而对车排子地区石炭系储层进行预测。预测的结果与实钻吻合较好,表明了磁震联合协模拟反演技术具有一定的可靠性与准确性,为火成岩油藏的勘探提供了一种新的思路与方法。

The volcanic reservoir of carboniferous strata in Chepaizi area in Junggar Basin is well developed.Affected by the various lithologies and burial depth,the seismic reflection of volcanic reservoir showed weak reflection and messy reflection.It is difficult to predict reservoir only using seismic data.Typically,magnetic data has a large advantage to identify volcanic lithofacies and lithology.This paper intends to use the advantages of spatial structure of 3D seismic data combined with magnetic data to carry out cosimulation inversion,expecting to get 3D magnetic data under constraint of 3D seismic data.On this basis,volcanic reservoir of carboniferous strata has been predicted in using this 3D magnetic data.Prediction results are in good agreement with actual drilling results.This study demonstrates that the technology of cosimulation inversion using joint of magnetic and seismic has a certain reliability and accuracy.The study also provides a new idea and method for exploration of volcanic reservoir.