涪陵焦石坝页岩气层压力预测技术研究

发布时间：2018-04-30 20:19

本文选题：涪陵页岩气田 + 复杂构造区　；参考：《石油物探》2017年04期

【摘要】：压力系数是页岩气保存条件的综合判别指标。以涪陵焦石坝页岩气藏为例,基于压力偏低系数与高角度裂缝密度呈正相关关系,提出了复杂构造区基于裂缝修正的压力系数预测技术及实现流程。首先利用已知井建立封存型和逸散型压力系数预测模型,然后基于归一化的曲率属性定量表征裂缝密度,建立压力偏低系数预测模型,最后综合考虑地层速度和裂缝密度,实现复杂构造区的压力系数预测。焦石坝三维工区五峰组—龙马溪组页岩气层压力系数的预测结果表明,该技术适应性强,预测精度高,在中国南方多期构造运动影响下的勘探区块具有很好的推广应用价值。
[Abstract]:The pressure coefficient is a comprehensive discriminant index of shale gas preservation conditions. Taking Fuling Jiaoshiba shale gas reservoir as an example, based on the positive correlation between low pressure coefficient and high angle fracture density, the prediction technology and realization process of pressure coefficient based on fracture correction in complex structural area are put forward. First, the pressure-coefficient prediction model of sealed and dissipative type is established by using known wells, then the fracture density is quantitatively characterized based on normalized curvature attribute, and the prediction model of pressure coefficient is established. Finally, the formation velocity and fracture density are considered synthetically. The prediction of pressure coefficient in complex tectonic area is realized. The prediction results of shale gas pressure coefficient of Wufeng formation and Longmaxi formation in three dimensional Jiaoshiba area show that the technology has strong adaptability and high prediction accuracy, and it has a good application value in the exploration blocks under the influence of multi-stage tectonic movement in southern China.
【作者单位】：中国石油化工股份有限公司勘探分公司;
【基金】：国家科技重大专项(2017ZX05036) 中国石油化工股份有限公司科技部基础研究项目(P15074)联合资助~~
【分类号】：P618.13;P631.4

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