伊拉克A油田Asmari组沉积特征研究

发布时间：2018-05-08 12:09

本文选题：伊拉克 + Asmari组　；参考：《西南石油大学》2015年硕士论文

【摘要】：伊拉克A油田是中海油与伊拉克政府合作开发的一个油田,曾因伊拉克战争而停产,战后急需恢复生产,而研究其沉积特征对恢复生产具有重要的意义。本文以沉积学、沉积岩石学、层序地层学、地球物理测井等理论作为指导,对研究区进行地层划分对比,建立了地层格架,并综合运用岩心资料、薄片资料、测井资料、分析化验资料及前人研究成果,建立了一套沉积相识别标志。在此基础上,完成了研究区内16口井的单井沉积相划分,采用单井—联井—空间的研究思路,遵循从沉积相识别和划分到单井、联井、平面沉积相分布特征分析及空间沉积相建模的技术路线,对研究区沉积特征进行了分析,取得的成果和认识如下： (1)在岩心资料和测井资料的基础上,对研究区内16口井进行了地层划分对比,将Asmari组分为A、B、C3个油组,A1、A2、A3、B1、B2、B3、B4、C8个小层,建立了研究区的地层格架。A油田从上到下为三个岩性段,A油组主要为白云岩,B油组主要为石灰岩,C油组主要为砂泥岩。 (2)从岩心和薄片观察入手,对岩性特征、颜色特征、结构特征、沉积构造特征、古生物特征和测井相等沉积相标志进行精细刻画,建立了一套研究区Asmari组的沉积相识别标志。 (3)根据沉积相识别标志,结合前人的研究,分析了研究区的沉积环境,总结出研究区Asmari组为广海陆棚—开阔台地—局限(蒸发)台地环境变迁模式,划分出5个亚相：陆棚泥、半局限泻湖、台内滩、局限泻湖和碎屑潮坪。建立了单井垂向沉积序列,进而研究了沉积相横向和平面展布特征,在参考前人研究的基础上建立了研究区的沉积模式。 (4)根据地层划分对比得到的分层数据和单井的沉积相数据,采用确定性建模的方法,将地质学家的思想融入三维模型中,建立了研究区的沉积相模型,实现了沉积相的三维可视化。
[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.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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