收稿日期: 2013-05-06
修回日期: 2014-01-27
网络出版日期: 2014-06-10
基金资助
中国石油天然气股份有限公司科学研究与技术开发项目(编号:090106-4)资助.
Seismic Detection of Bank Complex in Xiaohaizi Formation ofCarboniferous,Western Maigaiti Slope
Received date: 2013-05-06
Revised date: 2014-01-27
Online published: 2014-06-10
麦盖提斜坡西段群苦恰克地区钻井揭示石炭系小海子组发育高能滩沉积，并在群苦恰克以南地区发现大规模的异常地震响应特征。为了探索这些异常地震响应特征的地质属性，根据钻井、地震及区域地质资料，探讨了小海子高能滩发育时期的沉积环境，指出斜坡西段小海子组为碳酸盐岩缓坡沉积模式，发育内缓坡、中缓坡和外缓坡相。在沉积相研究的基础上分析各沉积相带的地震相特征，并对异常地震响应特征进行综合描述和解释，有效预测了高能滩的空间展布规律。研究结果表明:高能滩具有反射时间厚度异常增厚和振幅减弱2大典型反射特征，形成了叠瓦状反射、透镜状反射、低频弱反射和波状—串珠状反射4种地震响应，高能滩沿着中缓坡厚度变化带呈NEE向带状展布，具有较大的分布范围和规模。
田雷,崔海峰，陈永权，张年春，李得滋 . 麦盖提斜坡西段石炭系小海子组高能滩沉积体地震识别[J]. 天然气地球科学, 2014 , 25(6) : 928 -933 . DOI: 10.11764/j.issn.1672-1926.2014.06.928
Drilled well demonstrated that the Carboniferous Xiaohaizi Formation develops bank complex at the Qunkuqiake structural belt in western Maigaiti slope,and anomalous seismic responses have been discovered in the south of Qunkuqiake structural belt.For exploring the geology properties of anomalous seismic response,according to drilled wells,seimic and regional geology data,the bank complex's sedimentary environment in Xiaohaizi Formation is investigated.It is pointed out that the sedimentary model of Xiaohaizi Formation in western Maigaiti slope is carbonatite gentle slope.On the basis of the research of sedimentary facies,the seismic facies' characteristics of different sedimentary facies are analyzed,and the characteristics of anomalous seismic responses are depicted and interpreted.Research results show that bank complex has two kinds of typical reflection characteristics,i.e.,abnormal thickening of the reflection time thickness and the decrease of amplitude.It forms four anomalous seismic responses which are imbricate retrograding reflection,lenticular reflection,low frequency weak amplitude reflection and wave-miniliform noncontinuous reflection.Bank complex mainly developed in banding of NEE trending at middle gentle slope facies belt whose thickness changed obviously.Bank complex has major distribution range and scale.
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