【摘要】 针对以往利用三维纵波地震资料无法准确预测川西地区深层致密砂岩裂缝,特别是网状发育的规模裂缝系统的难题,在川西地区实施了三维多分量地震勘探。充分利用三维多分量地震纵横波地震属性、方位各向异性以及横波分裂现象估算裂缝发育的方位和密度,较好地解决了川西新场气田须家河组超致密砂岩裂缝网络系统的预测问题,为勘探和开发井位设计提供了可靠依据;同时,形成了针对不同尺度裂缝的预测方法和技术流程。钻探证实,三维多分量地震技术在川西新场地区深层致密砂岩裂缝预测中效果显著,钻井成功率由过去的50%提高到了89%。更多还原

【Abstract】 The 3D multi-component seismic exploration was carried out in the western Sichuan Basin for the previous use of 3D P-wave seismic data failed to precisely predict fractures in deep-seated tight sandstones of this area,especially disabling to solve the problem of determining giant net-fractured systems. The 3D multi-component seismic exploring technique can predict the azimuth and density of the fracture development by means of P-and S-wave seismic attributes,azimuthal anisotropy and S-wave splitting phenomenon,and it contains various predicting methods and technical processes for different-size fractures. A full application of this technique preferably resolved the problem in predicting multi-size net-fractured systems of ultra-tight sandstones of the Xujiahe Formation in the Xinchang gasfield,western Sichuan and offered some credible proofs for the well planning in gas exploration and development. The drilling has proved that the newly drilled wells planned by means of the 3D multi-component seismic exploring technique in the Xinchang area,western Sichuan,are almost high-yield gas-wells,and the drilling success ratio has been raised from 50% in the past to 89% at present.更多还原