商741井区火成岩地震裂缝预测

Seismic prediction of fracture in igneous rock in Shang-741 well zone

应用地震资料预测裂缝不仅与实际油气开发效果有关,而且也是地震勘探领域的前缘课题。本文采用岩性 预测与裂缝预测相结合的思路,首先利用测井约束地震反演方法查明商741井区火成岩分布,再通过三维多尺 度边缘检测技术沿火成岩顶、底界进行非等时的裂缝识别,最后结合构造解释、钻测井资料进行裂缝预测,提出 油气有利分布区。预测结果表明,此方法的预测精度较高,与实际吻合较好,可指导本区井位部署,具有较高的 实用价值。

Applying seismic data to predict the fracture is not only relative to real effects of oil-gas development , but also a front subject of seismic exploration. Adopting the idea companing the prediction of lithology with the prediction of fracture,the paper first used logging-constrained seismic inversion to clarify the distribution of igneous rock in Shang-741 well zone,then,carried out the non-isochronal fracture identification along the top and bottom interfaces of igneous rock by using 3-D multi-scale edge detection technique,finally conducted the prediction of fractures by combining with the structural interpretation and drilling and logging data and presented the areas favorable for oil-gas distribution. The predicted results showed that the method has advantages of high-predicted precision and better fit with practice, which could guide arrangement of well site in this area and have higher practical value.