Yanchang 4 + 5 sector to yanchang 3 sector lithofacies palaeogeography pattern was stable , because the constitution background was steady , and the source direction had no change , and supply was abundant . in those sectors the basin development was in lake retreat , and in the period of extinction gradually , and formatted construction delta deposit , but in yanchang 33 period the sedimentary speed were greater than construction speed , showing that overriding river mouth bars were abundant 长4 + 5 ?长3期湖盆发展处于湖退、萎缩逐渐消亡时期,由于构造背景稳定,物源来源方向没有变化,物源供给充分,所以岩相古地理格局基本一致,形成建设性三角洲沉积,但长3 ~ 3期沉积速率大于构造沉降速率,表现为叠置河口砂坝极其发育。
The shallow thermocline distributes in the areas of guangdong , guangxi , fujian and vietnam continental shelf , with obviously seasonal variabilily , and at the same time , in the south and middle areas of nanhai , even in winter when there is no thermocline in the coastal area , there also exists the shallow thermocline 后者广东、广西、福建沿海陆架区则与黄、东海相同,表现为季节性温跃层,有成长、强盛、消衰、无跃层的年周期变化过程。南海深温度跃层基本属于水团叠置型,跃层分布范围及跃层强度、上界深度、厚度与气候关系不大。
Furthermore , sorting of the sandstones in the braided river is better compared with that of in the meandering river system . in the same subfacies , grain size is larger and sorting is better in the channel sandstones which developed with large - scale cross - beddings such as trough cross - bedding , compared with sandstones in the flood microfacies . in the same microfacies , better sorting and coarser grained sandstones are distributed in the middle and lower part of the unit 与曲流河亚相相比,辫状河亚相砂岩的粒度较粗,分选性较好,砂体多次叠置而规模更大;相同河流亚相的河道微相与泛滥平原微相相比,前者的砂岩粒度较粗、分选性较好,发育槽状交错层理等大型层理构造;在同一微相内,处于中下部的流体单元其粒度较粗,分选较好。
Early days this paper pluses the land type figure and the land use figure to achieve type unit of land ecosystem based on defining the evaluation principle and system . the different evaluation factors are selected in view of different use types and experimentally defined the pawer of factors 本文在确定评价原则与系土地资源评价与统的基础上,采用自然土地类型图与土地利用现状图进行叠置的办法获得土地生态类型单元,对不同利用类型有针对性地选择了不同的评价因子。
Guided with the theories of plate tectonics and complex hydrocarbon system , based on the analysis of geological factors of hydrocarbon pools in the northern area of tarim basin , the author puts forward the geological background favorable for and the possible areas most suitable for the formation of complex traps . the identification and description of complex traps lead to the recognization of five large and four middle or small complex traps , by the means of the main techniques and methods include the detailed interpretation of seismic profiles , drilling , logging , map compiling based on the depth of sealing surface and on the superimposed relation of stratigraphic lithology over and beneath the unconformity surfaces , and the the use of the reversion of jason and 3d coherent data . at the same time , the major controlling factors of complex trap oil pool have been analyzed based on the case study of typical oil pools in the paper 目前,复合圈闭勘探及研究工作在我国还比较薄弱,本文以板块构造学、复式含油气系统等理论为指导,通过对塔北地区石油地质特征的整体解剖,从动态的角度,综合分析和探索了塔北地区复合圈闭形成的地质背景及发育的有利区带和领域,根据钻、测井及地震剖面精细解释成果,采用封闭面编图、不整合面顶底板地层岩性叠置关系编图方法和jason及三维相干数据体等地球物理反演技术,发现大型复合圈闭显示2个,中小型复合圈闭4个,复查落实大型复合圈闭3个,并通过典型油气藏解剖,分析了塔北地区复合圈闭成藏主控因素分析。
It can be dispart 137 sand layers in the droop of 15 sand groups and adds up to 1191single sand layers , summarizes 7 types of correlation : steady , spite , pinch , stack , stack - pinch , stack - spite , complex in the work . the relation between the distribution types of substrata with reservoir levels are four types of reservoir , and i , ii are good reservoir of gas in bawu gas field 通过对15个砂层组内的小砂层进行认真、详细地划分,在垂向上共划分出137个小层,共计1191个单砂层,并总结出七种井间小层对比分布类型:稳定分布型、分叉型、叠置尖灭型、稳定叠置型、重叠分叉型、复合型。