【摘要】 济阳拗陷有 10 0多口井在泥岩地层中见到良好的油气显示 ,其中河口地区 10多口井获商业油流或高产商业油流 ,一般地这些泥岩裂缝油气藏呈条带状分布在沙三段下部地层中 ,以自生自储为主 ,泥岩地层富含钙质或砂质。针对该地区的地质特点及多波勘探技术优势 ,在河口地区部署及实施了 8条二维测线的多波勘探 ,其中东西向测线 4条 ,南北向测线 4条。室内建立了各测线的 VP及 VS速度模型 ,获得了纵波及转换波的叠加剖面及有关参数剖面。目的层的含油裂缝泥岩体现了纵波层速度明显降低 ,而转换波层速度几乎不变化的基本特征。AVA反演和裂缝参数反演结果与目的层的地质结构基本吻合 ,特别是由快、慢横波分离求取的裂缝参数正确反映了泥岩裂缝等各向异性信息 ,预测出的泥岩裂缝发育主方向与钻井提供的裂缝方向及断层的走向基本一致 ,预测的裂缝发育程度与油井产量有很好的一致关系。泥岩裂缝发育区分布呈北东走向的特点 ,为今后确定井位提供了宏观指导的依据。更多还原

【Abstract】 There are more than 100 wells that good oil gas shows have been found in shale formation in Jiyang depression,among which the commercial oil or the commercial oil with high production have been found in more than 10 wells in Hekou area.These fractured oil gas reservoirs in shale generally distribute in lower formation of Es 3 section,forming a belt zone.The reservoirs are mainly self source and self reserve.There is rich in calcium and sandy in shale formation.Aimed at the geologic feature of the region and the advantage of multi wave exploration,eight 2 D lines of multi wave exploration have been planned and operated,among which 4 lines are for east west direction and other 4 lines are for north south direction.The V P and V S velocity model for each line has been built,from which the stack sections of P wave,converted wave and corresponding parameter sections are obtained.Oil bearing fractured shale of targets show the basic feature that interval velocity of P wave sharply decreases while that of converted wave is nearly unchanged.AVA inversion and inversive results of fractured parameters basically coincide with geologic structure of targets,especially the fractured parameters obtained from separating fast and slow S wave correctly reflect the anisotropic information of fractured shale,predicted major developed direction of fractured shale is basically consistent with the direction of fracture or fault provided by drilling results and predicted fracture developed degree has good consistent relation with well production rate.The distribution of fractured shale developed zone has the feature of northeast orientation,providing the basis of macro guide for defining well site in future.更多还原