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   low wave impedance 在 石油天然气工业 分类中 的翻译结果: 查询用时:0.423秒
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low wave impedance
相关语句
  低波阻抗
    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;
短句来源
    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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  low wave impedance
There is no radiation of acoustic waves into the gas fill because the gas has a very low wave impedance.
      
A small magnetic loop sets up a primarily magnetic field and therefore leads to low wave impedance close to the antenna.
      


The Suining Formation gas pools as newly-explored gas pools in Luodai have an explored reserve of more than 10~(10) m~3 of natural gas.The sedimentary environments are dominated by ephemeral shallow lakes,where the prograded delta front subfacies deposits are developed.The favourable sedimentary microfacies consist of the delta front subaqueous distributary channel,channel-mouth bar and sheet sands.The clastics are predominantly derived from the Longmen Mountains west of the western Sichuan depression.The Xindu-Luodai...

The Suining Formation gas pools as newly-explored gas pools in Luodai have an explored reserve of more than 10~(10) m~3 of natural gas.The sedimentary environments are dominated by ephemeral shallow lakes,where the prograded delta front subfacies deposits are developed.The favourable sedimentary microfacies consist of the delta front subaqueous distributary channel,channel-mouth bar and sheet sands.The clastics are predominantly derived from the Longmen Mountains west of the western Sichuan depression.The Xindu-Luodai zone on the eastern slope of the depression is(occupied) by the delta facies with the intercalations of sandstone and mudstone,in which a number of Suining Formation lithologic traps are developed.Several sets of reservoir-seal associations near the underlying source rocks facilitate the(accumulation) and preservation of natural gas.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".The discovery of these(large-)(sized) lithologic gas pools opened(up a) vast range of prospects for the shallow gas exploration in western Sichuan.The Suining Formation gas pools will(serve as) the key target of extended assessment and risk exploration of the shallow gas in the study area.

洛带遂宁组气藏为新发现气藏,已提交天然气探明储量上百亿立方米。洛带遂宁组沉积环境以季节性浅水湖为主,发育进积型三角洲前缘亚相沉积,有利的沉积微相是三角洲前缘水下分流河道、河口砂坝和席状砂。物源来自川西坳陷西侧的龙门山,其中坳陷东坡的新都—洛带地区处于中部的砂泥岩互层的三角洲相带,在斜坡带上形成了大型的遂宁组岩性圈闭。洛带地区遂宁组具有多套储盖组合,又靠近下伏烃源岩,对天然气的富集和保存十分有利。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;砂泥互层型的地震响应是“强中弱”。该大型岩性气藏的发现,说明川西地区浅层气仍然具有大的勘探前景,遂宁组气藏将是浅层扩展评价勘探和风险勘探的重要目标。

The non-marine shallow-middle gas reservoirs(with depth ranging from 500 m to 3000 m) in western Sichuan depression are near-normal to tight sandstone of distal facies.These reservoirs are mainly distributed in the Jurassic and Cretaceous formations where large-to medium-sized gas fields,such as Xinchang,Luodai,Xindu,Majing,and etc,are harbored.The shallow-middle reservoirs in western Sichuan depression feature in well-developed reservoirs,favorable transportation conditions,ideal matching of reservoir distribution...

The non-marine shallow-middle gas reservoirs(with depth ranging from 500 m to 3000 m) in western Sichuan depression are near-normal to tight sandstone of distal facies.These reservoirs are mainly distributed in the Jurassic and Cretaceous formations where large-to medium-sized gas fields,such as Xinchang,Luodai,Xindu,Majing,and etc,are harbored.The shallow-middle reservoirs in western Sichuan depression feature in well-developed reservoirs,favorable transportation conditions,ideal matching of reservoir distribution and structure configuration,and good sealing.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.The seismogeological conditions are rather unfavorable in western Sichuan depression,where the surface is covered by unconsolidated pebble and sandy soil beds with thickness ranging from several meters to 200 meters,resulting in severe high frequency attenuation and strong interference waves,such as surface wave,acoustic wave and refraction wave,and low S/N ratio.Therefore,a successful gas reservoir recognition in the study area involves the application of high-precision 3D seismic data acquisition in areas covered by unconsolidated pebble layers,3D seismic processing with gas bearing seismic responses preserved,reservoir seismic attributes extraction and analysis based on forward modeling,and reservoir spatial delineation and multi-disciplinary integrated evaluation.The exploration and production of the shallow-middle gas reservoirs in the study area show that seismic exploration plays an important role in delineation of reservoir distribution,description of the spatial geometry of the reservoirs,inverse modeling of the reservoir parameters,study of sedimentary facies and heterogeneity,determining prolific gas-bearing zone,and recognition of gas-bearing properties.

川西坳陷陆相沉积领域浅、中层(深度大约在500-3000 m)天然气藏属近常规到致密砂岩远源气藏。这些气藏主要分布在侏罗系─白垩系的地层中,并形成了如新场气田、洛带气田、新都气田、马井气田等大、中型气田。川西坳陷的中、浅层气藏具有储层发育良好、输导条件较好、储层展布与构造配置关系好及封盖保存条件良好等特点。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。川西坳陷地震地质条件较差,地表覆盖有几米至200多米厚的卵石和沙土,高频吸收严重,原始地震记录干扰波(面波、声波及折射波)发育,信噪比较低。因此,川西坳陷中、浅层气藏储层识别成功的关键技术是卵石覆盖区高精度的三维地震采集、保持含气地震响应特征的三维地震资料处理、正演模拟指导下的储层地震属性提取及分析和储层空间展布刻划及多学科协同的综合评价等。川西中、浅层气藏的勘探开发实践表明,地震勘探技术在气藏分布范围确定、空间几何形态描述、储层物性参数反演、沉积相和储层非均质性研究以及高产富集带预测、含气性识别等方面发挥了十分关键的作用。

 
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