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地震综合反演方法在准噶尔盆地YJ地区砂体预测中的应用
石油物探
2009年 48卷 第No. 6期
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Title
Application of integrated seismic inversion method on sand prediction in YJ area
单位
中国石油化工股份有限公司石油勘探开发研究院南京石油物探研究所，江苏南京210014
Organization
Nanjing Institute of Geophysical Prospecting,Exploration & Production Research Institute,SINOPEC,Nanjing 210014,China
摘要
在准噶尔盆地YJ地区，中、上侏罗统中发育的地层圈闭和地层〗岩性复合圈闭是主要的勘探目标。但该区目的层埋深大，储层薄，地层接触关系复杂，储集体与围岩波阻抗差异小，储层的识别与预测较为困难。针对该地区储层预测存在的问题，提出了解决方案：应用波形分析技术刻画地层剥蚀线，应用三维相干技术识别断层，应用井约束波阻抗反演技术描述目的层段的大套砂组和波阻抗差异明显的反射界面，应用地震特征约束下的多参数岩性反演技术描述薄砂体的展布特征。后验井证实，采用以上方法可以对YJ地区薄砂体进行有效识别和预测。
Abstract
Middle and Upper Jurassic stratigraphic traps and stratigraphiclithology traps in YJ area of Junggar Basin are the main exploration targets.Its difficult to identify and predict the reservoir because of deep buried strata,thin reservoir,complex stratigraphic contact,and weak impedance contrast between reservoir and the shoulderbed.Aiming at the problems,a resolving scheme was proposed:waveform analysis technique is used to characterize stratigraphic erosion line,3D coherence technique is used to identify fault,wellconstrained impedance inversion is used to identify targeted large sets of sandstone and reflection interfaces with strong wave impedance constrast,seismic characteristics constrained multiparameter lithologic inversion is used to identify and characterize the distribution of thin sandbody.Then,the posterior drilling information proved that the method can be used to effectively recognize and predict the thin sand bodies in YJ area.
关键词：
准噶尔盆地;
地层圈闭;
地层岩性圈闭;
井约束波阻抗反演;
多参数岩性反演;
砂体预测;
Keywords:
Junggar Basin;
stratigraphic trap;
stratigraphiclithologic trap;
wellconstrained impedance inversion;
multiattributes lithology inversion;
sand body prediction;
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