平衡剖面技术在龙门山中段构造解释中的应用

Application of balanced section technique in structural interpretation of middle Longmen mountains

龙门山推覆冲断带地形条件恶劣,构造断裂复杂,阻碍了该区油气资源的勘探进程。为搞清龙门山推覆冲断带下的构造样式,验证其构造解释方案,应用平衡剖面技术,对龙门山中段具典型构造特征的地质、地震综合解释剖面进行平衡恢复。实例分析证明,平衡剖面技术可正确指导龙门山中段构造剧烈变形区的构造解释方案,并可定性、定量分析构造变形期次和变形程度,为下一步油气勘探提供可靠依据。

The extreme topographic conditions and complex structures of Longmen mountains thrust belts hold back the process of oil resources exploration.In order to insight into the structural styles of thrust belts in Longmen mountains and verify the scheme of structural interpretation,the balanced-section technique has been used in the build-up of the interpretational model with the typical seismological and geological characteristics in middle Longmen mountains based on the data of surface geology,seismic and wells,which also can analyze the tectonic process quantitatively and verify the justifiability of structure interpretation.The result of example analysis proves that the balanced section technique can correctly guide the interpretation scheme of complexly deformed area in middle Longmen mountains thrust belt,and can quantitatively analyze the stage and degree of tectonic deformation,the result can supply faithful foundation for further exploration.