准噶尔盆地地震勘探评价优化体系的建立和应用

Establishment and Application of the Optimized Evaluation System forSeismic Exploration in Junggar Basin

近年来,在“提质增效,高效勘探”的总体战略背景下,地震勘探的评价优化引起了人们广泛关注。准噶尔盆地地震勘探资料的处理和解释工作中,通过实施面向目标的一体化工作流程,提出了“三单一策”的研究方法及评价体系,并在实际应用中取得了显著效果。但该评价体系没有包含地震资料的采集工作,并且主要采用的是一些定性描述方法。为此,通过构建以地震资料有效频宽为核心评价指标,提出了地震采集的相应指标体系,从而将地震采集方案评估及优化纳入到地震勘探的评价优化中,提出了“三单一策2.0”,构建了一种地震勘探评价优化体系,并在多个勘探项目中实施,取得了显著的效果。所提出的方法思路,可为类似地区地震勘探的评价优化提供一定借鉴。

During implementing the recent“High⁃Quality and Efficient Exploration”strategy,evaluation and optimization of seismic explo⁃ration have attracted extensive attention.In processing and interpretation of the seismic data from the lithologic reservoirs in Junggar basin,a“Three Lists and One Countermeasure”method and its evaluation system are put forward based on a goal⁃oriented integrated workflow,and remarkable results have been achieved in field application.However,this evaluation system does not cover seismic data acquisition and mainly consists of some qualitative description methods.Therefore,by taking seismic data with effective bandwidth as a key indicator,a corresponding index system of seismic acquisition is proposed,then evaluation and optimization of seismic acquisition plan are contained in the evaluation and optimization system for seismic exploration,and finally the“Three Lists and One Countermeasure V2.0”is estab⁃lished.The optimized seismic evaluation system has been applied in multiple projects for lithologic reservoir exploration and remarkable results have been obtained.The methods proposed in this paper can be references to evaluating and optimizing seismic exploration for litho⁃logic reservoirs in similar areas.