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
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.
TIAN Lei,CUI Hai-feng,CHEN Yong-quan,ZHANG Nian-chun,LI De-zi . Seismic Detection of Bank Complex in Xiaohaizi Formation ofCarboniferous,Western Maigaiti Slope[J]. Natural Gas Geoscience, 2014 , 25(6) : 928 -933 . DOI: 10.11764/j.issn.1672-1926.2014.06.928
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