These geomorphic units of paleogeography constitute the basic model of paleocontinent , littoral - neritic sea and carbonate plateform at that stage , and this depositional model is similar to the pattern of the east china continent and ocean , which is the result of evolution during the past long geologic age 這些古地理地貌單元構(gòu)成了湖北省泥盆紀(jì)時(shí)期古陸濱淺海和碳酸鹽巖臺(tái)地的基本沉積模式,這種沉積模式與現(xiàn)今中國(guó)東海大陸、海洋格局基本一致,亦是經(jīng)過(guò)了漫長(zhǎng)地質(zhì)歷史時(shí)期演化,而形成現(xiàn)今這種格局的。
With regard to the causes of formation and sources of salt , people have different point of views in different basins , and different depositional models are set up , even in one same basin there are also divergent view to exist different opinions still exist on the position of the salt bearing strata in sequence stratigraphy . it will greatly influence the exploration level of resources in salt - bearing basin if the above doublts can not be made clear . in this way , it will be of great significance to make it clear about the above issues and the relationships about salt and oil & gas 對(duì)于鹽巖的成因及鹽源在不同盆地有不同的認(rèn)識(shí),并建立了各自的沉積模式,就是同一含鹽沉積盆地或含鹽沉積凹陷人們的認(rèn)識(shí)依然分歧很大,關(guān)于鹽巖在層序地層中的位置人們的認(rèn)識(shí)依然不同,對(duì)這些問(wèn)題的認(rèn)識(shí)不清將極大的影響對(duì)人們含鹽盆地的能源勘探開(kāi)發(fā)水平,因此搞清鹽巖的成因及其與油氣聚集的關(guān)系具有重要意義。
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(xué)、沉積巖石學(xué)、沉積成巖作用與儲(chǔ)層地質(zhì)學(xué)、儲(chǔ)層評(píng)價(jià)技術(shù)的新理論新方法為指導(dǎo),以塔里木盆地巴楚組東河砂巖段海相碎屑巖儲(chǔ)層為主要研究對(duì)象,通過(guò)17口典型井的單井地層沉積相分析和成巖作用分析,結(jié)合地震資料,對(duì)東河砂巖段地層和沉積體系進(jìn)行了詳細(xì)劃分,研究了東河砂巖段分布區(qū)的典型沉積相類(lèi)型、沉積模式及其平面展布特征;系統(tǒng)分析了東河砂巖段碎屑巖儲(chǔ)層的主要成巖事件、成巖期次及其四史配置關(guān)系,指出了儲(chǔ)層成巖與孔隙演化的關(guān)系;深入研究了東河砂巖段碎屑巖儲(chǔ)層的巖石學(xué)特征、物性分布、孔隙結(jié)構(gòu)等特征,著重討論研究了沉積環(huán)境、成巖作用和構(gòu)造作用對(duì)儲(chǔ)層發(fā)育的影響;運(yùn)用“權(quán)重”評(píng)價(jià)法結(jié)合地層沉積相、成巖演化和儲(chǔ)層特征研究的結(jié)果,選取了五個(gè)對(duì)儲(chǔ)層發(fā)育有重要影響的參數(shù)對(duì)儲(chǔ)層進(jìn)行了整體的評(píng)價(jià)和預(yù)測(cè),指出了塔里木盆地東河砂巖段儲(chǔ)層有利儲(chǔ)集體的分布狀況。