摘要
塔中北坡顺南地区奥陶系碳酸盐岩具有良好的勘探开发前景,近期在多个层系钻遇了储层和油气.研究显示该地区裂缝比较发育,并对储层的形成和改造起到了非常关键的作用,但目前针对该区的裂缝预测技术研究成果较少,以叠后属性评价为主.因此,本文从裂缝实际地质特征观察出发,基于叠前地震资料,综合多种方法进行裂缝预测.首先利用叠前构造应力场反演间接评价裂缝的发育密度和方向,基于评价结果对地震叠前数据进行不同方位划分方案的资料处理并对比,使用纵波方位各向异性方法预测储层裂缝发育方向与相对密度.多方法结合的预测结果符合研究区裂缝发育规律并与地质模式相吻合,通过与岩心及成像测井资料对比,验证了该地区使用较窄方位采集的地震数据进行裂缝预测结果的有效性.
There is a great prospect of exploration and production in Ordovician carbonate formation in Shunnan area,Northern slope of the Tazhong uplift. Reservoirs and hydrocarbon are discovered in different series of strata recently. The fractures which are important to the reservoir formation and reconstruction are well developed in the area. But presently there is little technique application and research result of fracture prediction,which is mainly predicted by post-stack seismic attributes. Therefore,based on the geological characteristics of fractures and pre-stack seismic data,the fractures are predicted by integrate method. First of all,the density and directions of fractures are estimated by structure stress field inversion. Then they are predicted by P-wave anisotropic parameters inversion using seismic data with different azimuth. The data processed with different schemes according to azimuth angle are compared. The predicted result obtained from integrate method fit well with the development laws of fractures in the area and coincide with the geological model research result. The effectiveness of fracture prediction by seismic data acquainted with relatively narrow azimuth angle in the area is proved by comparing the result with well cores and FMI.
作者
王康宁
李慧莉
张继标
WANG Kang-ning;LI Hui-li;ZHANG Ji-biao(SINOPEC Petroleum Exploration ＆ Production Research Institute, Beijing 100083, China)
出处
《地球物理学进展》
CSCD
北大核心
2017年第5期2078-2084,共7页
Progress in Geophysics
基金
国家重大专项(2017ZX05005-002)
中石化科技部项目(塔里木深层碳酸盐岩储层成因与分布)联合资助
关键词
塔中北坡
碳酸盐岩储层
裂缝
各向异性参数反演
应力场反演
northem slope of the Tazhong uplift
carbonate reservoir
fracture
anisotropie parameters inversion
stress field inversion
