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辽河油田杜229块油藏已进入开发中后期,区块主体部位井网比较密集,没有部署挖潜潜力,产能部署方向转为区块边部断层复杂区域。边部三维地震资料受其分辨率、信噪比的限制,在落实小断层、寻找微构造、追踪薄储层上难度较大。为此引入了VSP技术,并在杜229块西南部首先进行了应用。利用VSP测井高分辨率特征,通过零偏VSP资料提取的时深关系,准确进行层位标定;通过非零偏VSP资料识别小断层具体位置及构造情况。最后,根据VSP资料的解释结果 ,结合该区域三维地震资料和岩性资料以及储层及油层发育分布情况,对该地区重新进行地震解释,结合试采井状况,在潜力区域规划部署5口井,充分挖掘油藏潜力。该技术的应用为精细地质体研究、落实小断层位置、新井部署、改善区块开发效果提供了技术保障。
Du 229 reservoir in Liaohe Oilfield has entered the middle and late stages of development. The main part of the block has a large number of well patterns. There is no potential for potential tapping and the production deployment direction is turned into a complex area with fault-edge faults. Edge 3D seismic data is limited by its resolution and signal-to-noise ratio, which makes it difficult to implement small faults, find micro-structures and track thin reservoirs. VSP technology was introduced for this purpose and was first applied in the Southwest of Du 229. By using the high-resolution VSP logging features, the horizon calibration can be accurately carried out through the time-depth relationship of VSP data extraction. The specific location and structure of small faults can be identified by non-zero VSP data. Finally, based on the interpretation results of VSP data, combined with the three-dimensional seismic data and lithology data and the reservoir and reservoir development and distribution in this area, the seismic interpretation is re-conducted in this area. Based on the conditions of the test production wells, five wells are planned in the potential area , Fully tap the potential of the reservoir. The application of this technology provides technical support for fine geological study, implementation of small fault location, deployment of new wells and improvement of the effect of block development.