地层

Calculating formula of wave impedance is obtained by main values of the inverse tangent function of phase_shift at two neighboring frequencies and the corresponding integral character of phase_shift is denoted as the convergent criterion of wave impedance inversion.

利用复合反射系数中多个频率点的相移反正切函数主值，给出了波阻抗的计算公式，并把套管-地层环空间介质中波的相移的整、实特性作为波阻抗反演收敛的判据。

One type of serious accidents occurred in mine exploitation is water irruption.

矿井突水灾害是煤矿开采中特大事故类型之一，因此采矿前期的一个重要的地质任务就是探测采区内构造的分布及地层的含水性，查明是否存在断层、溶洞、裂隙等对开采可能带来不良影响的地质构造。

The deep water deposition means the deposition in the area where the water depth is larger than 30 meters, in which the major sediments are coarse sand and gravel. This kind of deposition is the relic deposition formed by the Pleistocene alluvial-lacustine deposition reworked under modern channel currents actions, and ususally the Holocene acummulation lack in the deep waters. The transitional zone deposition is the deposition between the low tidal level line and the 30 meters isobath, where the sediment types is changeable and the grain sizes are gradually coarsening from the low tidal line to the deep water area. This kind of deposition is developed by the deep water eroded sediments sorting under the transitional zone current action. The different types distributed along the isobath. The tidal flat deposition is the fine sediment deposition on the tidal flat which is flo sedimentation of the silty clay under the tidal flat dynamic action and ususally developed fluid mud on the lower tidal flat. The channel mouth deposition is the deposition in the channel mouth area. According to the sediment types, it includes sand deposition where there are coarse sediments supply and silt deposition where there are only fine sediments surpport.

峡道深水区沉积是指水深大于30米的峡道底部沉积，它以粗颗粒砂砾石沉积为特色，是现代峡道水动力对第四纪海退时发育的冲洪积和坡积物进行改造形成的蚀余沉积，全新世沉积地层往往缺失；峡道过渡带沉积是指水深介于低潮位线至30米水深线之间发育的峡道边坡沉积，该带沉积以沉积物类型多样为特色，自低潮位线至30米水深线，沉积物粒级逐渐变粗，由粉砂质粘土逐渐递变为中粗砂，是峡道深水区沉积物经多次分选沉积而发育的，基本平行于等深线分布的条带状沉积，在岸坡较陡岸段，过渡带下部可发育重力沉积；峡道潮滩沉积是指在低潮线与海岸线之间发育的细颗粒沉积，它是粘性细颗粒泥沙在潮滩动力作用下，发生动水絮凝沉积而形成的粉砂质粘土沉积，在低潮滩可发育浮泥；峡道口门区沉积则是在峡道汇入大海或海湾时，在峡道出口水流影响所及范围的沉积，根据峡道口门区供给泥沙的特性，峡道口门区沉积有粉砂质淤泥沉积和砂质沉积两种类型。

According to sequence boundary calibration, sequence boundaries were interpreted in isochronal stratigraphic frame with logging constrained inversion technology.

根据层序界面的标定结果，借助于测井约束反演技术，在区域地震剖面上对层序界面进行了追踪解释，建立了层序的等时地层格架。

Some authors proposed that the analyses of transfer cycles of high frequency base level and key surface correlation could be used to correlate isochronal strata.

在前人提出的高频基准面转换旋回分析和关键界面对比分析来确定等时性的基础上，以板中东油田板2油组水下冲积扇沉积为例，就湖盆内事件沉积的特点，提出可以结合洪泛面和事件沉积界面以及异旋回和自旋回来进行高分辨率层序地层的对比研究。

It is an important content of sequence stratigraphy applying in exploration practice that predicting distribution of sandstone through using the seismic data to study deposition spatial distribution, superposition style and sediment evolution in the various system tracts on the basis of isochronal sequence framework.

在等时层序格架建立的基础上，利用地震资料研究各体系域内部沉积体的空间展布、叠置样式和沉积演化过程，进而预测各体系域中砂体的分布，是层序地层学应用于勘探实践的重要内容。

The technique of stratal slices can reveal the isochronism of sediment disperal patterns with high-resolution. And the sedimentary systems can be analyzed with lithologic log data. A shelf-edge deltaic system including fluvial plain, deltaic plain, deltaic-front, prodelta, and incised valleys was identified in Olmos formation of Gold River North Oilfield.

相位转换后可以通过地震振幅分析岩相；地层切片技术能更精确地反映研究区等时的沉积分布特征，结合岩性测井资料可以较准确地分析沉积体系；Olmos组可以识别出一套河流－三角洲沉积体系，包括前三角洲亚相、三角洲前缘亚相、三角洲平原亚相、曲流河相和下切谷沉积等。

An approach has been made to high-precision isochronous stratigraphic and reservoir correlations.

解决了高精度的地层和储层等时性对比问题。

An isochronous unit of Biyang Depression was established.

建立了泌阳凹陷的等时地层单元。

And high resolution isochronous stratigraphic frameworks were established.

提出了2种非线性元件——蠕变体和裂隙塑性体。11。并建立等时地层对比格架。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失