基于地震沉积学的隐蔽圈闭识别—一个胜利油田的实例分析(英文)
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摘要
地震沉积学由于受地震分辨率的限制,往往不能定量刻画沉积体的特征,高精度的反演突破了地震传统分辨率的极限,将其引入到地震沉积学的研究领域,能够解决复杂地质条件下的隐蔽圈闭识别问题,从而拓展了地震沉积学的应用范围、改善应用效果。本文采用地震相控非线性随机反演作为核心技术,以地震沉积学理论为主体思路,应用于胜利油田车镇凹陷Es 3段砂砾岩体储层预测,编制了多期砂砾岩体的厚度分布图与沉积微相图,预测了多个隐蔽圈闭目标,经钻探后得到证实,取得了好的应用效果。
Seismic sedimentology is the study of sedimentary rocks and facies using seismic data.However,often the sedimentary body features can't be described quantitatively due to the limit of seismic resolution.High resolution inversion offsets this limitation and is applied to seismic sedimentology to identify subtle traps under complex geologic conditions,thereby widening the applicable range of seismic sedimentology.In this paper,based on seismic sedimentology,seismic phase-controlled nonlinear random inversion is used to predict the sandy conglomerate reservoir of Es3 in the Chezhen depression in Shengli Oilfield. Thickness and sedimentary microfacies maps of sandy conglomerate bodies in several stages are presented and several subtle traps were predicted and verified by drilling.
引文
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