Under the guidance of theories of sedimentology , petroleum geology and sequence stratigraphy , and through the comprehensive analysis of outcropsrock , cores , well logs and testing outcomes of rock gas , this paper studies the depositional systems of neopaleozoic and the character of aeration zone in tabamiao area of ordos basin . the result indicates that the object layers are divided into two depositional systems , the barrier seacoast depositional systems are recognized on upper carboniferous taiyuan phase with tidal flat , lagoon and barrier bar sedimentary deposit 本文根据沉积学、石油地质学和层序地层学理论，综合利用地表露头、钻井岩芯、测井曲线资料和试气成果资料，对鄂尔多斯盆地塔巴庙区块晚古生代沉积体系及含气层特征进行了研究。结果表明，研究区内目的层段可以划分为2个沉积体系： ( 1 )上石炭统太原期为有障壁海岸沉积体系，发育潮坪?泻湖?障壁砂坝沉积。
The variations in trace element contents and ratios may hold up a mirror to the lake - level fluctuations and climatic changes , which , in turn , have exerted a direct and important effect on the sequence stratigraphic development . collectively , the reservoir rocks from the yanchang formation consist dominantly of the delta front subfacies subaqueous distributary channel and channel - mouth bar microfacies and delta plain subfacies subaerial distributary channel microfacies fine - grained feldspar sandstones and siltstones . the reservoir rocks have been subjected to three stages of diagenetic and porosity evolution : ( 1 ) the porosity reduction by the mechanical compaction and chemical pressure solution during the early diagenetic stage ; ( 2 ) the porosity increase by the dissolution during the a substage of the late diagenetic stage , and ( 3 ) the porosity reduction by the cementation and filling during the b substage of the late diagenetic stage 系统的储层特征研究表明，该区延长组储层成因类型主要为三角洲前缘水下分流河道、河口砂坝及三角洲平原水上分流河道微相细粒长石砂岩、粉砂岩；储层岩石经历了压实，胶结，溶蚀等成岩作用，历经早成岩机械压实和化学压溶孔隙缩小期、晚成岩a亚期溶蚀作用孔隙扩大期及晚成岩a亚期( b亚期)胶结充填孔隙缩小期三个成岩-孔隙演化阶段；储层物性总体上具有较低孔渗、低孔渗的特点，孔隙类型主要为粒间溶孔、残余粒间孔隙、粒内溶孔、晶间孔及晶间溶孔，裂缝不发育，储集岩排驱压力和中值压力较高，孔隙结构类型以细小孔-微孔隙，微细喉-微喉型为主。
According to the abundance well logging , mud logging and core analysis data , gaotaizi reservoir has been classified into four sand group with the principle of cycle comparison and classified control . based on the detailed study of lithologic character , sedimentary structure , paleontologic fossils , depositional sequence , rock association and logging data , the microfacies of the studied area are divided into such seven types : subaqueous distributary channel microfacies ; river mouth bar microfacies ; subaqueous interdistributary channel microfacies ; subaqueous crevasse channel microfacies ; subaqueous natural barrier microfacies ; distal bar microfacies ; delta front sheet sand microfacies . the characteristic of each sedimentary microfacies are described detailedly 通过研究大量测井、录井资料和岩芯资料，依据“旋回对比，分级控制”的原则，把研究区高台子油层划分为g 、 g 、 g 、 g四个砂层组。通过对研究区岩性、沉积构造、古生物、沉积序列、岩石组合及测井曲线特征进行研究的基础上，认为研究区高台子油层属于三角洲前缘亚相沉积，并将研究区沉积微相划分为：水下分流河道、河口坝、水下分流河道间、水下决口扇、水下天然堤、远砂坝、席状砂等七种微相类型。
The sediments of the incised valleys show an upward - fining succession , and can be grouped into four sedimentary fades : gravel lag - deposit of in - channel to partly over bank sediments of a meandering river , flood plain - estuary , estuary - shallow marine , and estuary sand bar , based on lithology , paleontology , and sedimentary textures and structures 根据岩石学、沉积结构和沉积构造特征，本区下切河谷充填沉积物具有向上变细的沉积层序，可以划分为4个沉积相类型：河床滞留沉积物到部分曲流河沉积体系的边滩沉积、河漫滩河口湾沉积、河口湾浅海沉积和河口湾砂坝沉积。
Check dams , typhoons and rising temperature interact to suppress the salmon population repeatedly each year . the population must be uninterruptedly enlarged by artificial reproduction before the demolition of check dams to fortify the resilience and stability of salmon population under the impacts of natural calamities 拦砂坝、台风与逐年升高的水温已使樱花钩吻鲑面临严重生存危机，建议坝未拆除前，必须持续人工繁殖及放流工作，以扩大族群量，增加其天灾冲击下之回复力与稳定性。
They are skeletal sand bodies in system of delta and places of most reservoir distribution . the diagenetic processes that govern reservoir properties include the extent of compaction , cementation and dissolution of grains . we recognize that at the early diagenesis phase , mechanical and chemical compaction is very strong , which reduced the original porosity 河口砂坝多位于分流河道或次一级分流河道河口部位，向湖盆中心呈放射状分布，因而河口砂坝砂体多构成朵状砂体，覆盖面积大、连片好，砂体厚度大，是本区已知油藏主要分布区。
Sedimentary facies consist of fan delta , delta , nearshore submarine fan , sublacustrine fan , littoral - shallow lake beach and bar , as well as littoral - shallow lake , and semideep - deep lake facies and subfacies , of which the preferred sedimentary facies include delta , fan delta front , sublacustrine fan , midfan and outer fan of the nearshore submarine fan , and beach - bar facies developed in the littoral - shallow lake 综合考虑物源特徵、沉积环境、沉积体系平面展布以及生、储、盖组合关系，认为有利的沉积相带主要是三角洲、扇三角洲前缘、湖底扇、近岸水下扇的中扇和外扇以及滨浅湖中发育的滩坝和砂坝。
This research will try to resolve the distribution and controlling factors of gas layers by the study of division of substrata in bawu gas field . the main reservoir of bawu gas field are the sand layers in the formation of k1sh , k1y , k1d , k2q , sediment delta plane , delta frontier , plait delta developing distributary riverway sand , bayou sand dam , far sand dam and river sand of plait 八屋气田主要储层为早白垩世的沙河子组( k _ 1sh ) 、营城组( k _ 1y ) 、登娄库组( k _ 1d )及晚白垩世的泉头组( k _ 2q ) ，为三角洲平原、三角洲前缘及辫状河三角洲沉积体系，发育分流河道砂、河口砂坝、远砂坝、辫状河道砂等，砂层在平面上连通性差。
The rock types comprise the delta front subfacies subaqueous distributary channel , channel - mouth bar and distal bar microfacies , and delta plain subfacies subaerial distributary channel microfacies sandstones and siltstones . as for the reservoir quality , the subaqueous ( subaerial ) distributary microfacies channel sandstones are the first , the channel - mouth bar microfacies sandstones come second , the distal bar microfacies sandstones is the third , and the last one is the interdistributary bay microfacies sandstones . the intense compaction , pressure solution and late carbonate cementation are responsible for the reduction of the porosity and permeability of the reservoir rocks 三角洲前缘水下分流河道、河口砂坝、远砂坝及三角洲平原水上分流河道微相决定了储集岩的发育，分布及原始物性条件；水下(上)分流河道微相砂体厚度大、物性和孔隙结构好，次之为河口砂坝微相砂体，远砂坝微相砂体储集性较差，而分流伺湾微相砂体物性和孔隙结构最差。
