Prediction of Shale Gas Pressure based on Multi-channel Seismic Inversion in Fuling,Acta Geologica Sinica-English Edition

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Prediction of Shale Gas Pressure based on Multi-channel Seismic Inversion in Fuling
Acta Geologica Sinica-English Edition ( IF 3.5 ) Pub Date : 2021-06-21 , DOI: 10.1111/1755-6724.14778
Lei XING _{1,

2} , Yu LI ₁ , Qianqian LI ₁ , Yaowen LIU ₃ , Yunqiang WAN ₃ , Huiliang YANG _{2,

4}

Affiliation

The accurate prediction of formation pressure is important in oil/gas exploration and development. However, the achievement of this goal remains challenging, due to insufficient logging data and the low predictive data accuracy from seismic data. In this work, a case study was carried out in the Baima area of Wulong, in order to develop a workflow for accurately predicting shale gas formation pressure. The multi-channel stack method was first used, as well as the inversion of single-channel seismic data, to construct velocity and density models of the formation. Combined with the existing well-logging data, the velocity and density models of the whole well section were established. The shale gas formation pressure was then estimated using the Eaton method. The results show that the multi-channel seismic stacking method has a higher accuracy than the inversion of the formation velocity obtained by the single-channel seismic method. The discrepancies between our predicted formation pressure and the actual formation pressure measurement are within an acceptable range, indicating that our workflow is effective.

中文翻译：

基于多道地震反演的涪陵页岩气压力预测

地层压力的准确预测在油气勘探开发中具有重要意义。然而，由于测井数据不足和地震数据的预测数据准确性低，实现这一目标仍然具有挑战性。在这项工作中，以武隆白马地区进行了案例研究，以开发准确预测页岩气地层压力的工作流程。首次使用多道叠加法，以及单道地震资料的反演，构建地层的速度和密度模型。结合已有测井资料，建立了全井段速度和密度模型。然后使用伊顿方法估算页岩气地层压力。结果表明，多道地震叠加法比单道地震法获得的地层速度反演精度更高。我们预测的地层压力与实际地层压力测量值之间的差异在可接受的范围内，表明我们的工作流程是有效的。

更新日期：2021-06-21

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