diagenetic 中文意思是什麼

During diagenetic process, there may exist the fractional crystallization of clino - pyroxene, plagioclase, olivine and ti - fe oxide, and the accumulation of olivine. the alkalic - ultramafic dikes formed by low degree partial melting ( 3. 4 % ) of enriched mantle, consist of single olivine pyroxenolite, the dominating olivine fractionation is evident

成因上為富集地幔部分熔融作用的結果，但在成巖過程中也可能存在單斜輝石、斜長石、橄欖石和ti - fe氧化物等礦物的分離結晶作用。

Researches of more than four decades in the field, especially from the early 1980s on, during which the analysis of the isotopes in fossil brachiopods and early diagenetic cements has contributed much to the knowledge, achieved appreciable progress

40多年的研究結果，尤其是進入80年代方解石質的腕足化石殼體和早期成巖膠結物等特殊樣品的應用，取得了若干重大研究進展，但同時也發現了一些新的問題。

Based on the authigenic and clay mineral assemblage, two types of diagenetic ambient have been recognized in the meso - cainozoic detrital rocks in tarim basin

根據自生礦物與粘土礦物組合，在塔里木中新生界碎屑巖中可以識別出兩種成巖環境。

Celestite is usually diagenetic but commonly forms very early in the history of the sediment.

天青石一般是成巖期的，但通常是在沉積史的極早期形成的。

The division of diagenetic stages in clastic rocks

碎屑巖成巖階段劃分

The main diagenetic stage and relevant rock types are the middle proterozoic assemblage of gneissoid granodiorite - adamellite and the sinean schistosity diorates

主要成巖期及代表性巖類有：中元古界為片麻狀花崗閃長巖二長花崗巖，震旦紀為片理化閃長巖。

Diagenetic traps in fault - depressed lacus basin : take eh3 member in biyang depression as an example

以泌陽凹陷下第三系核桃園組三段為例

We find that the petrology characteristic of all the samples have no characteristic of meteoric water such as geopetal structure, infiltrative sand, ( uniform cement and gravitational cement on base of the research of the dolomite in the regions. on the dot diagram of combination of mgco3 ( mol % ) and sr, the dot are all close to the line of seawater whether they are microlite - crystalline penecontemporaneous dolostone or diagenetic dolostone of various crystals. the 87sr / 86sr value of dolostone or matrix is less than the one of sparry calcite in cave or vein, and close to the value of seawater

通過本區白雲巖的研究發現：已有的白雲巖樣品的巖石學特徵沒有顯示出如示底構造、滲濾沙、新月型膠結物和重力膠結物等大氣淡水作用的特徵；在白雲石mgco _ 3mol百分數和白雲石sr含量的投點圖中，無論是準同生成因的泥?微晶白雲巖，還是粉?細晶（或中晶，或細晶以上的不等晶）的成巖白雲巖，均投在海水線的附近；白雲巖（或基質）的~ （ 87 ） sr / ~ （ 86 ） sr比值顯著低於與孔洞或脈中充填的亮晶方解石，且與海水值十分接近， ~ （ 13 ） c和~ （ 18 ） o值顯著高於孔洞或脈中充填的亮晶方解石，也偏向于海水值； mn含量則顯著低於孔洞或脈中充填的亮晶方解石。

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

系統的儲層特徵研究表明，該區延長組儲層成因類型主要為三角洲前緣水下分流河道、河口砂壩及三角洲平原水上分流河道微相細粒長石砂巖、粉砂巖；儲層巖石經歷了壓實，膠結，溶蝕等成巖作用，歷經早成巖機械壓實和化學壓溶孔隙縮小期、晚成巖a亞期溶蝕作用孔隙擴大期及晚成巖a亞期（ b亞期）膠結充填孔隙縮小期三個成巖-孔隙演化階段；儲層物性總體上具有較低孔滲、低孔滲的特點，孔隙類型主要為粒間溶孔、殘余粒間孔隙、粒內溶孔、晶間孔及晶間溶孔，裂縫不發育，儲集巖排驅壓力和中值壓力較高，孔隙結構類型以細小孔-微孔隙，微細喉-微喉型為主。

There are three kinds of crack include of structure crack, diagenetic crack and synaeresis crack in this area

該區裂縫主要有構造縫、成巖縫和收縮縫三種類型。

In 1979 in terms of the resources of the cement oil field dr t. j. donovan, worked in the geo - survey graduate school, proposed that there is diagenetic magnetite in sediment terrane above oil and gas reservoir

1979年美國地調所t . j . donovan博士根據cement油田資料推測在油氣藏上覆沉積巖層中存在與烴類垂向運移相關的成巖作用磁鐵礦。

Directed by new theories and approaches of sedimentology, diagenesis and reservoir evaluation, focused on marine clastic reservoir of donghe sandstone member, in tarim basin, strata and depositional system of donghe sandstone member are classified ; typical depositional facies types, depositional model and horizontal distribution have been studied through depositional facies analysis of 17 single wells, combined with seismic data. major diagenetic events, stages and " four history " collaboration have been systematically analysesed, furthermore, the relation between reservoir diagenesis and porosity evolution has been built ; thorough studies on reservoir lithology, physical property and pore structure, reservoir development related to depositional envoironment, diagenesis and tectonic has been discussed ; reservoir has been evaluated and predicted by five influential parameters drawn from the results of the study on depositional facies, diagenesis and reservoir characteristic. in the end, favourable reservoir body distribution has been pointed out

本論文以沉積學、沉積巖石學、沉積成巖作用與儲層地質學、儲層評價技術的新理論新方法為指導，以塔里木盆地巴楚組東河砂巖段海相碎屑巖儲層為主要研究對象，通過17口典型井的單井地層沉積相分析和成巖作用分析，結合地震資料，對東河砂巖段地層和沉積體系進行了詳細劃分，研究了東河砂巖段分佈區的典型沉積相類型、沉積模式及其平面展布特徵；系統分析了東河砂巖段碎屑巖儲層的主要成巖事件、成巖期次及其四史配置關系，指出了儲層成巖與孔隙演化的關系；深入研究了東河砂巖段碎屑巖儲層的巖石學特徵、物性分佈、孔隙結構等特徵，著重討論研究了沉積環境、成巖作用和構造作用對儲層發育的影響；運用「權重」評價法結合地層沉積相、成巖演化和儲層特徵研究的結果，選取了五個對儲層發育有重要影響的參數對儲層進行了整體的評價和預測，指出了塔里木盆地東河砂巖段儲層有利儲集體的分佈狀況。

Among of them, carbonate rock is the primary type of them, it is the product of stable platform facies of marine. we study the geochemical characteristic of carbonate rock of lower palaeozoic burial hills in the regions of zhuangxi and chengdao and find that the calcite fillings in cave or vein have high value of 87sr / 86sr, low value of 13c and 18o and high mn content among of different structural components. so it has been exposed to be dissolved by meteoric water on supcrgene diagenetic stage

通過對樁西、埕島地區下古生界碳酸鹽巖的地球化學特徵研究，表明在巖石的各種結構組分中，洞或脈中的方解石充填物具有顯著較高的~ （ 87 ） sr ~ （ 86 ） sr比值，較低的~ （ 13 ） c 、 ~ （ 18 ） o和較高的mn含量，其所經歷的重要巖溶作用是大氣淡水成巖作用，發生的時間為表生成巖階段。

The diagenetic state of a deposit might also be connected with the underground temperatures.

一個礦床的成巖狀態也可能和地下溫度有關。

The division of diagenetic stages in carbonate rocks

碳酸鹽巖成巖階段劃分

Poor diagenetic grade

成巖性差

The diagenetic environment results in different water - rock reaction and development of secondary porosity

成巖環境在一定程度上影響了水巖反應及次生孔隙發育。

The main diagenetic minerals of the reservoir rock are chlorite, laumontite, calcite and authigenic quartz and so on

在成巖作用研究的基礎上，建立了成巖及孔隙演化模式。

The fracture in studied area can he divided into diagenetic micro - facture, weathering fracture and structural fracture

研究區的裂縫可以劃分為巖微裂隙、風化裂隙和構造裂縫3種類型。

The formation mechanism of the pore of diagenetic dolostone includes : 1 ) the primary porosity is essential condition for the formation of dolostone reservoir

成巖白雲巖孔隙的形成機制有: l ）巖石的原生孔隙度是成巖白雲巖儲層形成的必要條件。