本文選題：伊拉克 + Asmari組　； 參考：《西南石油大學》2015年碩士論文

【摘要】：伊拉克A油田是中海油與伊拉克政府合作開發(fā)的一個油田,曾因伊拉克戰(zhàn)爭而停產,戰(zhàn)后急需恢復生產,而研究其沉積特征對恢復生產具有重要的意義。本文以沉積學、沉積巖石學、層序地層學、地球物理測井等理論作為指導,對研究區(qū)進行地層劃分對比,建立了地層格架,并綜合運用巖心資料、薄片資料、測井資料、分析化驗資料及前人研究成果,建立了一套沉積相識別標志。在此基礎上,完成了研究區(qū)內16口井的單井沉積相劃分,采用單井—聯(lián)井—空間的研究思路,遵循從沉積相識別和劃分到單井、聯(lián)井、平面沉積相分布特征分析及空間沉積相建模的技術路線,對研究區(qū)沉積特征進行了分析,取得的成果和認識如下： (1)在巖心資料和測井資料的基礎上,對研究區(qū)內16口井進行了地層劃分對比,將Asmari組分為A、B、C3個油組,A1、A2、A3、B1、B2、B3、B4、C8個小層,建立了研究區(qū)的地層格架。A油田從上到下為三個巖性段,A油組主要為白云巖,B油組主要為石灰?guī)r,C油組主要為砂泥巖。 (2)從巖心和薄片觀察入手,對巖性特征、顏色特征、結構特征、沉積構造特征、古生物特征和測井相等沉積相標志進行精細刻畫,建立了一套研究區(qū)Asmari組的沉積相識別標志。 (3)根據(jù)沉積相識別標志,結合前人的研究,分析了研究區(qū)的沉積環(huán)境,總結出研究區(qū)Asmari組為廣海陸棚—開闊臺地—局限(蒸發(fā))臺地環(huán)境變遷模式,劃分出5個亞相：陸棚泥、半局限瀉湖、臺內灘、局限瀉湖和碎屑潮坪。建立了單井垂向沉積序列,進而研究了沉積相橫向和平面展布特征,在參考前人研究的基礎上建立了研究區(qū)的沉積模式。 (4)根據(jù)地層劃分對比得到的分層數(shù)據(jù)和單井的沉積相數(shù)據(jù),采用確定性建模的方法,將地質學家的思想融入三維模型中,建立了研究區(qū)的沉積相模型,實現(xiàn)了沉積相的三維可視化。
[Abstract]:Iraqi oil field A is an oil field developed jointly by CNOOC and the Iraqi government. It is urgent to resume production because of the war in Iraq, and it is of great significance to study the sedimentary characteristics of the oil field. Guided by the theories of sedimentology, sedimentary petrology, sequence stratigraphy and geophysical logging, this paper makes stratigraphic division and correlation in the study area, establishes a stratigraphic framework, and synthetically uses core data, thin slice data, logging data, etc. Based on the analysis of laboratory data and previous research results, a set of sedimentary facies identification marks has been established. On this basis, the single well sedimentary facies division of 16 wells in the study area has been completed. The single well combined well space research idea has been adopted, and the sedimentary facies recognition and division from single well to single well and joint well have been followed. The distribution characteristics of planar sedimentary facies and the technical route of spatial sedimentary facies modeling are analyzed. The results and understandings are as follows: (1) based on core data and logging data, 16 wells in the study area were divided into 8 sublayers of A1A1, A2A2, A2, B3, B1, B2, B3, B3, B3, and B4, respectively, of which 16 wells in the study area were divided and correlated. The stratigraphic framework. A oil formation of three lithologic formations from top to bottom in the study area is mainly composed of dolomite and B oil formation, mainly limestone and C oil formation, mainly sand and mudstone. (2) based on the observation of cores and thin sections, the characteristics of lithology, color, structure, sedimentary structure, paleobiology and logging equivalent sedimentary facies are described in detail, and a set of sedimentary facies identification marks of Asmari formation in the study area are established. 3) based on the sedimentary facies identification criteria and previous studies, the sedimentary environment of the study area is analyzed, and the Asmari formation in the study area is concluded to be a model of environmental change of Guanghai continental shelf, open platform and limited (evaporation) platform, which is divided into five subfacies: shelf mud. Semi-restricted lagoons, terrace beaches, limited lagoons and clastic tidal flat. The vertical sedimentary sequence of single well is established, and the characteristics of lateral and planar distribution of sedimentary facies are studied, and the sedimentary model of the study area is established on the basis of reference to previous studies. 4) according to stratigraphic data and sedimentary facies data of single well, the method of deterministic modeling is used to integrate the ideas of geologists into the three-dimensional model, and the sedimentary facies model of the study area is established. The 3D visualization of sedimentary facies is realized.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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