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低波阻抗
    Four low wave impedance intervals are identified which correspond to the following 4 reservoir intervals: (1) 3150-3170m, log interpreted water-and oil-bearing interval in Peng xl2 well;
    这4个低波阻抗段分别对应的储层段为:(1)3150~3170m井段,为蓬xl2井测井解释的含水、油层段;
    1. Utilizing the comprehensive research of geology, log well, seimsmology we thought, jialingjiang group semismology respond characteristic show as the low wave impedance mainly.
    1.利用地质,测井,地震的综合研究认为,嘉陵江组储层的地震响应特征主要表现为低波阻抗特征。
    So it is of multiple solubility to predict the gas bearing san ds tone only by use of the low wave impedance,because both the gas bearing sandsto n e and the mudstone have the low wave impedance.
    泥岩表现为高伽玛和低波阻抗特征 ,这样含气砂岩与泥岩均有低波阻抗特征 ,故仅用低波阻抗来预测含气砂岩则具有多解性。
    Analyzing well logging, seismic and geologic data in the studied area indicates that the logging response modes of an oil-bearing sandbody are low wave impedance, mid-low gamma ray and mid-high resistivity, its seismic response is low frequency and high amplitude, its sedimentary facies is mainly a delta frontal channel mouth bar.
    对研究区测井、地震和地质资料分析表明,含气砂体的测井响应模式为低波阻抗、中低伽马、中高电阻率,其地震响应为低频强振幅,沉积相主要为三角洲前缘河口砂坝。
    The integration of synthetic well logs and Jason inversion shows that the(seismic) responses of the Suining Formation gas-bearing sandstones are manifested by the model of "strong wave trough,(moderate)-strong wave crest and low wave impedance".
    通过合成记录的标定J、ason反演表明,遂宁组含气砂岩的地震响应模式为“强波谷、中—强波峰,低波阻抗”模式;
    Sedimentary micro-facies reservoirs are mainly composed of delta front sill-like sand,delta front distributary channel sand,estuarine sand bar,and sublacustrine fan sand. The reservoirs typically show low wave impedance and large wave impedance difference with surrounding rocks.
    储层沉积微相以三角洲前缘毯状砂体、三角洲前缘分流河道砂体、河口坝砂体和湖底扇砂体等为主,储层地球物理特性通常表现为低波阻抗特征,与围岩具有良好的波阻抗差异。
 

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