基于岩石物理分析的叠前同时反演研究——以天草区块岩性油藏为例  

Pre-stack Simultaneous Inversion Research Based on Rock Physics Analysis:A Case Study of Lithologic Reservoir in Tiancao area

作　　者：范亮 Fan Liang(Research Institute of Exploration and Development,Tuha Oilfield Company,PetroChina,Hami 839009)

机构地区：[1]中国石油吐哈油田分公司勘探开发研究院

出　　处：《石化技术》2019年第11期132-133,共2页Petrochemical Industry Technology

摘　　要：研究区位于银额盆地天草凹陷,该区储层为典型的低孔、低渗油藏,物性变化大,非均质性强,砂泥岩纵波阻抗叠置,叠后反演难以解决储层预测问题;为此开展了基于岩石物理分析与岩性目标处理技术的叠前同时反演研究;叠前反演得到的纵横波速度比可以有效的反映岩性及流体特征。通过Xu&White岩石物理模型解决横波预测难题,获得多种弹性参数寻找识别岩性和流体的敏感参数。上述研究为该区地震叠前同时反演提供了可靠的基础资料,使得该区储层预测更有针对性,提高了岩性和流体的识别精度。The research area is located in the Tiancao depression of Yine basin.This area is a typical reservoir with low porosity,low permeability,high heterogeneity and sandstone and mudstone impedance superposition.So It is difficult to solve reservoir prediction problems by post-stack inversion;Therefore a pre-stack simultaneous inversion based on rock physics analysis and lithologic target processing is carried out,so the vp/vs from pre-stack parameter inversion is sensitive to lithology and fluid.Xu&White rock physics model resolve the question of s-wave prediction and find the good parameter for reservoir prediction and fluid discrimination,The above studies provide the reliable foundation data,making the reservoir prediction more targeted and improving lithology and fluid identification accuracy in this area.

关 键 词：岩石物理分析 横波预测 叠前同时反演 

分 类 号：P61[天文地球—矿床学]