序

On the basis of analyzing the law of variation of the zero order current, the zero order voltage and the zero order power in the isolated neutral system, a synthetic criteria principle of selecting the grounded fault line according to three criterias at the same time was put forward.

1中性点不接地系统零序电流的分析中性点不接地系统在发生故障时零序电流的变化最明显，因而对故障情形下零序电流的大小、相位及其功率等关系进行分析很有必要。1.1零序电流的大小关系对于NUS，其线路图见图1。图中kl和k：断开。

From bottom to top, a complete terrigeous sequence in fault-depressed lacustrine basin consists of the following sequence units in turn: Sequence Boundary→Lowstand System Tract (no coast-onlap)→Trangressive System Tract (distinct coast-onlap)→Highstand System Tract being composed aggradational lacustrine mudstone with low sedimentation rate→Regressive System Tract (distinct coast-dropback)→Sequence Boundary.

断陷湖盆中一个完整的陆相层序自下而上依次由下列层序单元构成；层序界面→无湖岸上超的低水位体系域→湖岸显著上超的水进体系域→由沉积速率缓慢的垂向加积型湖相泥质岩构成的高水位体系域→湖岸显著退却的水退体系域→层序界面。

Seven thirdorder seismic sequences can be recognized from bottom to top in the Paleogene in the Wushi sag, which consist of a depositional sequence from transgression to regression as a whole and correspond to different stages of structural evolution. Sequences developed in different stages of structural evolution are different in filling sequence and distribution of sedimentary system. Multiphase structural evolutions result in development of source rocks and reservoir and cap rocks in various parts of the sag. The sequence 2-4 deposited in strong chasmic stage have the best source rocks and sealing conditions as well as various favorable reservoirs, thus are the most favorable targets for obtaining discoveries in this sag.

结果认为：乌石凹陷古近系从下至上可以划分为7个三级地震层序，整体上为一个水进到水退的序列，分别对应不同的构造演化阶段；不同构造演化阶段发育的层序具有不同的充填序列和沉积体系分布；构造演化的多期性使得该凹陷多个部位都有烃源岩和储、盖层发育；其中以强烈裂陷阶段沉积的层序2-层序4中发育的烃源岩和盖层条件为最好且发育多种有利储集体，是该凹陷寻找油气藏的最有利层段。

The sedimentary formation can be summarized as epicontinental sea filling sequence, offshore debris lake basin sequence and inner continental lake basin sequence etc.

在此基础上，对沉积层序地层进行了探讨，划分出了陆表海、近岸碎屑湖盆和内陆湖盆等3个层序组以及18个沉积层序，建立了研究区层序地层学格架。

Based on the identification of the sequence boundry with the comprehensive analyses of the seismic, well logging and well drilling data, the palaeogene in Jiyang depression can be divided into one lst-order and three 2nd-order sequences, of which six 3rd-order sequences can be subdivided from the third stage of Shahejie formation to Dongying formation.

本文在综合利用地震、声波时差测井、地层倾角测井、电阻率测井、岩心、地球化学等方法进行层序地层界面识别的基础上，将济阳坳陷古近系划分出1个一级层序，3个二级层序，其中沙三段-东营组分出6个三级层序。

Basing on theregional sequence stratal framework, carry through the elaboratecompartmentalization of sequence stratum in major horizon and basing on seismicand logging data, use seismic sequence stratigraphy and drilling sequence stratigraphyto discuss isochronous stratal distributed pattern in framework.

在建立区域层序地层格架的基础之上，对重点层位进行精细层序地层划分，在地震资料和测井资料的基础上，利用地震层序地层和钻井层序地层，探讨等时地层格架内的地层分布模式。

The Upper Submember of the 4th Member of the Shahejie Formation in Huimin Depression represents one third-order sequence according to sequence stratigraphic analysis based on well log and seismic reflective data. Lowstand, lacustrine transgressive and highstand systems tracts can be recognized based on the stacking patterns and changes of lithology and lithofacies. The sequence stratigraphic correlation of well-tie sections made it possible to construct the regional stratigraphic framework.

应用层序地层学方法，通过钻井、测井、地震反射等标志，将惠民凹陷沙四上亚段划分为1个三级层序，并以地层叠置样式、岩性、岩相的变化细分为低位、湖侵和高位3个体系域；在连井剖面层序对比的基础上建立起研究区沙四上亚段层序地层格架。

The development of sequences and system tracts are mainly controlled by the tectonic events,and the most favorable sequence types are the quickly faulted-depressed sequence and syngenetic faulted-depressed sequence,for they both contain best source rock,reservoir bed and caprock.

在充分利用钻井、测井、地震资料的基础上建立了该地区层序地层充填模式；指出油气在这些层序和体系域类型中的赋集规律，认为快速断坳层序和同生断坳层序能形成最有利的生储盖组合。

On the basis of systemic and embedded analysis of the sequence stratigraphy and basin, and combining with the factors of global sea level fluctuation, tectonic subsidence, paleoclimate change, terrigenous sediments filling and carbonate productivity, the dynamic model of sequence filling have been founded, which can be used to explain forming mechanism of special parasequence in studying area and ultimately give the definition of sequence filling dynamics.

在系统、深入的层序研究和盆地分析的基础上，结合全球海平面升降、构造沉降、古气候背景、陆源沉积物的注入和碳酸盐的产率等因素，分别建立了不同类型盆地的层序充填动力学模型，并根据这些模型对研究区特殊的准层序形成机理进行了解释，最后给出了层序充填动力学的定义。

According to the analysis of features of the key outcrop sequence stratigraphy, build the sequence frame, through the section comparison, and the study of feature of the 5 key outcrops, then it can be concluded that, conglomerate on the denudation plane or the other contrastive sediment are the main features surrounding the bottom border of the sequence. In the foreland basin sediment environment, the transilient group of mud rock and sandstone are the main sediment features of low-stand system tract. Thick mud rock and sandstone interbedded is the chief component of transgressive system tract, sometimes together with thick turbidity current sandstone; High-stand system tract is composed by the combination of mud rock and sandstone interbedded, with the progradation as its main style. Maximum flooding surface Sediment are usually mudstone, and the thickness is different from each other.

依据关键露头剖面高精度层序特征分析，通过剖面对比建立高精度等时层序地层格架，通过对5条关键露头剖面的详细高精度层序特征分析，认识到：剥蚀面上的粗碎屑岩或与之可区域对比的其它沉积是层序底部边界附近的主要沉积特征；在盆地沉积环境中，砂泥岩发育，厚层、块状砂岩与泥质岩类的突变组合是低位体系域的主要沉积特征；湖进体系域以厚层泥岩夹砂岩为主，有时夹厚度较大的重力流砂体；高位体系域为砂泥互层沉积组合，以进积式叠加样式为主；最大湖泛面多为泥岩，但其厚薄不一。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。