After analyzing of the whole situation , granularity is smaller . the lithology of chang 6 oil - bearing is a set of felspar sandstone . little of them are rock - scraps felspar sandstone 通过研究发现延长组6段储层砂岩为一套中?细粒长石砂岩及少量粉砂岩，油层组砂岩远离物源区，成分单一，表明其物源稳定。
The dark - gray traction current deposits belong to internal - tide deposits , it develops sandstones and siltsands , and charactered with lenticular , wave , flaser bedding , bimodal cross - bedding and ripple mark 深水牵引流沉积为内潮汐沉积类型，岩性为细砂岩、粉砂岩，以发育透镜状、波状、脉状层理、双向交错层理、波痕等沉积构造为特征。
Thus it became well - known for frequent geologic - disaster and landslide in the stratum area . xigeda soft rock is made up from minute sandstone , mud siltstone , siltstone mud and mudstone . it is inland fluviolacustrine phase deposit rock with rhythm - cyclic character of depositional geology 昔格达组极软岩属内陆静水河湖相沉积，主要由粉细砂岩、泥质粉砂岩、粉砂质泥岩和泥岩组成，具有明显的沉积韵律特征。
Under the guidance of new principles and methods of modern sedimentology , detrital petrography , reservoir geology , diagenesis , this thesis has carried out detailed study on paleogene formation correlation , sedimentary environment , characteristics of sedimentary facies and diagenesis of the eastern kuche depression , tarim basin , dina area being taken as the main target of the study . based on the core , geology logging , log and seismic data from 9 typical wells , combined with the data of the adjoining area , the dominant sedimentary types of the study area have been recognized and illustrated , such as fan - delta , lacus and normal delta . in terms of the analysis on the sedimentary facies of typical and connecting wells in different areas and facies belt , together with the paleogene tectonic evolution characteristics of foreland basin , the distribution and evolution of the sedimentary facies of the study area have been clearly discovered both vertically and laterally 通过对该区9口井的岩芯、录井、测井、地震资料及邻区资料的分析，识别并阐述了库车坳陷东部下第三系的几种主要的沉积相类型，如扇三角洲相、湖泊相和正常三角洲相；通过对不同地区、不同相带典型井及连井的沉积相分析，结合前陆盆地在下第三系的构造演化特点，弄清了迪那地区下第三系沉积相的纵横相发育展布和演化规律，并建立了沉积相模式；同时，初步开展了成岩作用、储层孔隙演化和储层发育模式的研究工作，科学合理地解释了现今迪那地区下第三系储产层主要发育在粉砂岩中的特殊现象，首次建立了下第三系储层的发育演化模式，为库车坳陷东部地区进一步寻找下第三系大储量、高产油气藏和有利的勘探区块提供科学的、可靠的和最直接的地质依据。
Based on the analysis of thin sections by microscope , measurement of porosity and density , and geological setting , we tested the rock physical parameters of sandstone , siltstone , carbonate and other transitional sedimentary rocks by the mts system under formation conditions ( temperatures , pressures and pore fluid properties ) . the rocks we tested are from tertiary ( including zhujiang formation , zhuhai formation , enping formation , hanjiang formation ) of zhujiangkou basin in southern china sea . according to the analysis results , we studied the main ultrasonic wave velocity characters of rocks , which are compressive and shear wave velocity and poisson ' s ratio under different formation conditions 在对珠江口盆地第三系储集岩进行显微镜薄片分析、孔隙度和密度分析，以及地质背景分析的基础上，利用岩石物理参数测试系统( mts )模拟地层条件(温度、压力和孔隙流体状况)测试了珠江口盆地第三系(包括珠江组、珠海组、恩平组、韩江组，以下有关讨论同)砂岩、粉砂岩、碳酸盐岩及其过渡性岩石物理性质，重点研究了不同地层条件下岩石的声学特征(岩石的纵横波速度和泊松比) 。
They are the finely - layered siltstone that formed ping chau , the port island conglomerate , the thick volcanic rock layers ( tuff ) along the coast of po pin chau and the granite at lamma island . these stamps appeal not only to the eyes , but also to the hands because of the tactile coating that achieved with the application of thermography 四款邮票上的岩石图案和设计分别取材自平洲的粉砂岩、赤洲的砾岩、破边洲的凝灰岩和南丫岛的花岗岩；我们除了可以用肉眼去欣赏之外，更可以用手去触摸、去感受。
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 rock and mineral analysis , the formation consists dominantly of detrital feldspathic fine - sandstone with medium and silt sandstone secondly . lithologically , the content quartz is lower than those of feldspar and detritus , and the cement is dominated by clay , which gives the feature of low compositional maturity and low textural maturity 馆上段储层岩性以岩屑质长石细砂岩为主，其次为中细砂岩和粉砂岩，岩石中石英含量低，而长石、岩屑含量高，胶结物以泥质为主，表现出低成分成熟度和低结构成熟度的特点。
3 ) from the samples saturated completely by air to those saturated completely by brine , the velocities of compressive wave of the rocks increase obviously , with the extent of 11 . 73 % ; the velocities of shear wave change little or decrease slightly , with the average of decreasing extent of 1 . 21 % for shear wave 1 and 1 . 16 % for shear wave 2 . the difference of velocity between compressive wave and shear wave makes poisson ' s ratio increase obviously , with the average extent of 87 . 25 % 3 )从完全饱和气到完全饱和水，珠江口盆地第三系砂岩、粉砂岩、碳酸盐岩及其过渡性岩石类型的纵波速度是显著增加的，平均增加幅度为11 . 73 ；横波速度变化很小，或略有降低，横波1平均降低幅度为1 . 21 ，横波2平均降低幅度为1 . 16 ；纵横波速度的这种差异变化导致泊松比显著增加，平均增加幅度为87 . 25 。
