高级检索

    塔河油田高精度勘探地震采集技术分析与实践

    Analysis and application on high-precision seismic acquisition technology in Tahe Oilfield

    • 摘要: 塔河油田主力产油层奥陶系碳酸盐岩缝洞型储层非均质性强, 埋藏深, 以往三维地震资料精度低, 不能满足油田进一步勘探开发的需要。根据该区缝洞型储集体的固有特征, 结合前期地震采集的技术经验, 对数据采集的观测系统设计、检波器接收与噪声压制、地震波激发等3个关键技术环节进行了针对性的分析和优化, 提出了面向开发的高精度勘探地震采集技术:①采用小网格、高覆盖、长排列、宽方位的大道数三维正交横向慢滚动观测系统; ②采用"品"字形组合方式接收, 同时采用调低电机转速等措施压制老油区特殊噪声; ③忽略"低频段"影响, 在潜水面以下最佳激发深度激发。塔河油田10区东、10区西等多块高精度三维地震勘探实践证实了该技术的有效性。

       

      Abstract: The Ordovician carbonate fractured-cavern reservoir, as the main oil pay zone in Tahe Oilfield, is characterized by strong heterogeneity, deep-buried, low-precision 3D seismic data, which cannot meet the needs for the further exploration and development.Aiming at the characteristics of the fractured-cavern reservoirs in the area, combining with the field tests and application of seismic acquisition techniques in the past years, a high-precision seismic acquisition technique facing oilfield development was proposed by analysis and optimization on three key steps including geometry design, geophone receiving and noise suppression, seismic wave shooting.Firstly, the orthogonal three-dimensional slow-rolling geometry consisting of small grid, high fold, long arrangement, wide-azimuth and big trace number is utilized.Secondly, "品" shape array is applied to receive records, meanwhile, the specific noise in old oil area is suppressed by some measures such as reducing motor speed.Thirdly, we shoot at the optimal shooting depth below water table and ignore the impact of "low-frequency section".The application of high-precision 3D seismic acquisition in East10 area and West10 area in Tahe Oilfield proves the effectiveness of the technique.

       

    /

    返回文章
    返回