复杂断块油藏的精细构造解释方法

FINE STRUCTURAL INTERPRETING METHOD OF THE COMPLEX FAULT-BLOCK OIL RESERVOIRS

海拉尔盆地为断陷盆地,构造起伏大,断裂复杂。针对断陷盆地地震资料主频低、小断层识别难的问题,通过叠前深度偏移处理提高了地震资料的分辨率。采用高精度的合成地震记录和第四代相干、三色混相分频等技术开展了井—震联合精细构造解释,并结合三维地质建模进行了断点组合,实现了断层"线—面—体"的空间识别和解释,重构了该区的构造认识体系。

Hailer Basin is characterized by the complex rifted basin, large-amplitude structure relief and complex faults. In view of the problems of the lower primary frequency of seismic data and difficult-to-identify small faults, the resolution of the seismic data is improved by means of the pre-stack depth migration processing. With the help of the high-precision synthesis seismic traces/records, the fourth-generation coherent, three-color mixed phase crossover techniques and so on, the fine structure interpretation by well and seismic combination is carried out. And furthermore combining with the 3D geological modeling, the breakpoint assembly is achieved, thus the space identification and interpretation of the ＂line-plane-body＂ faults are realized and moreover the structural knowledge system in this area has been reconstructed.