面向地质目标需求的变密度采集方法研究及应用

Research and application of a variable density acquisition method for geological target demand

为兼顾当前高质量、低成本勘探的要求,充分满足油田不同地质目标任务需求,在分析以往高精度三维观测系统采集成本、开展经济性评价分析的基础上,针对不同地质目标、不同地质需求,进行变密度观测系统优化方法的研究与应用。结合东部平原和南方山地等地区的三维地震采集,系统提出面向不同地质目标的变密度采集对策。通过野外精心施工、严格落实方法,获得较高质量的变密度采集数据。后续成像处理及经济评估证明了该方法不仅能够较好地完成地质任务,而且能够实现较低成本的高质量勘探。

In order to meet the current requirements of high-quality and low-cost exploration across different geological targets in an oilfield,based on the analysis of the acquisition costs of existing high-precision three-dimensional(3 D)observation systems,an optimization method based on a variable density observation system has been developed and applied to areas with different geological targets and requirements.After obtaining information from 3 D seismic acquisition campaigns in YC,CL-FCZ,and WL areas,various density acquisition countermeasures were proposed for different geological targets.Through careful field construction and strict implementation of the method,high-quality variable density acquisition data were obtained.The subsequent image processing and economic evaluation demonstrated that the proposed method can not only complete the geological task well but also achieves high-quality exploration with a low cost.