These characteristics have close relation with transgression from eastern to western . 4 . reefs undermined various and complicated diagenesis , in which cementation , dolomitization and corrosion etc . play main roles in the history of reef diagenesis 4礁岩的成岩作用具多样性和复杂性，其中泥晶化、填积、胶结、白云化和溶蚀作用最为重要。
Among them , phreatic , vadose and in the middle of convection zones undergone dissolution ( especially in vadose zone ) . the mixing and upper convection zones undergone cementation . the lower convection zone remained unaltered 其中渗流、潜流和深部对流带中部以溶蚀作用为主(潜流带最强烈) ，混合带和对流带上部以胶结作用为主，对流带下部成岩作用不活跃。
Pressure separation is usually controlled by the following factors , such as subsidence rate , sediment types and diagenesis during the diagenetic evolution , as a result the pressure gradient is uncontinuous 地层压力分隔化是由于沉积物在成岩演化过程中受各种因素，如沉积速率、沉积物类型以及成岩作用的影响，使地层中的流体压力梯度呈现出随深度变化不连续的一种现象。
In this research , some conclusions are followed : l ) in the tahe oilfield , multiphase tectonic movement and pleokarst were so deeply worked on the diagenesis that the types of diagenesis are various , and the relation of those are complicated 本次研究最终得出如下结论： 1 )研究区由于受到多期构造运动的影响，又受到多期古岩溶作用的叠加改造，成岩作用类型多样，关系复杂。
Abstract : pressure separation is usually controlled by the following factors , such as subsidence rate , sediment types and diagenesis during the diagenetic evolution , as a result the pressure gradient is uncontinuous 文摘:地层压力分隔化是由于沉积物在成岩演化过程中受各种因素，如沉积速率、沉积物类型以及成岩作用的影响，使地层中的流体压力梯度呈现出随深度变化不连续的一种现象。
Organic chemistry is involved both in the analysis of oil and gas and in the study of the diagenesis of the plant and animal tissues in sediments and the way in which the resultant organic compound , kerogen , generates petroleum 有机化学则可应用于分析原油和天然气，研究沉积物中植物和动物组织的成岩作用，研究动植物组织转化为合成有机化合物，揭示由此而生成的有机化合物干酪根生成石油的方式。
3 . the correlation of isotopic constitution and the relations between diagenesis and co2 indicate that co2 mainly derived from tertiary ca - mud rocks . the carbonate cements in reservoirs under the affection of hot fluid may form co2 , but the yield of co2 is low 基于碳酸盐矿物及本区浅层co _ 2的同位素组成对比分析，并结合浅部储层成岩作用与co _ 2的相互关系，认为co _ 2可能来自第三系钙质泥岩。
The dolostones have experienced several types of post - depositional diagenetic modifications , of which dolomitization , dissolution , recrystallization and tectonic stress processes have exerted an important effect on porosity and permeability 认为该白云岩在沉积期后变化中经历了多种成岩作用改造，其中影响白云岩储集性的作用主要有白云石化作用、溶蚀作用、重结晶作用和构造应力作用，对白云岩孔渗改善起了积极作用。
The distribution of the reservoir is controlled by the depositional environment and the faces which are mainly alluvial , delta and river . determined by the diagenesis and the latter reformation , the physical property of the reservoir in general is poor , ranked as class 3 - 4 储层分布则受沉积环境、沉积相控制，主要有冲积扇、扇三角洲、河道砂等砂体，储油物性则受成岩作用及后期改造影响而较差，属级。
The article mainly analyzes the chang 6 reservoir in the upper triassic in ordos basin . by tectonics , sequence stratigraphy , sedimentology and diagenesis , poly - statistics , and so on . it touches many professional fields , composing of 7 chapters and 23 sections 论文主要应用构造学，层序地层学，沉积学和成岩作用，以及多元统计等知识对鄂尔多斯盆地上三叠统延长组6段储层进行了细致的研究，内容较丰富，共有7章23节。
