华北油田强振幅高连续地震反射多解性分析及技术对策

华北油田二连盆地具有多旋回层序、多套生储盖组合、多种类型砂岩体圈闭和多期油气成藏等特征,如何有效地提高针对砂泥岩互层的研究与预测成为开展储层预测研究的重要问题。文章论述了"强振幅、高连续"的地球物理响应特征增大了储层预测多解性,并就此问题提出了相应的技术对策。指出砂泥岩互层研究区以提高分辨率为核心,在等时地层格架约束下,结合正演模拟技术,从理论模型出发,利用拓频、分频处理与地震反演相结合的方法开展综合研究。应用实例表明技术对策在研究区取得了较好的效果,为二连盆地的井位部署、储量上交提供重要的理论依据和技术支撑。

Multiplicity Analysis on Seismic Reflection of Strong Amplitude and High Continuity in Huabei Oilfield and Countermeasures

Erlian Basin in Huabei Oilfield features in polycyclic sequence, multiple sets of source-reservoir-cap rock assemblages, diversified sandstone traps, and multi-period accumulation. So how to improve research and prediction on sand-shale interbed efficiently becomes an important issue for conducting reservoir prediction research. This paper discusses the geophysics response characteristics of ＂strong amplitude and high continuity＂, which increases the multiplicity of reservoir prediction, and puts forward corresponding countermeasures. It is pointed out that the sand-shale interbed research area focuses on improving resolution, under the constraint of isochronous stratigraphic framework, combining with forward modeling techniques, proceeding from theoretic model, and using the method integrating frequency broadening, frequency dividing, and seismic inversion to conduct comprehensive research. Application shows that countermeasures have brought about good results, providing important theoretic basis and technical support for well deployment and reserves submission in Erlian Basin.