周矶油田潜3~2、潜4~1油组储层分布研究

发布时间：2018-01-28 19:19

  本文关键词： 精细构造解释 地质模型正演 属性分析 储层分布预测　出处：《长江大学》2017年硕士论文　论文类型：学位论文

【摘要】：在国内石油工业发展几十年的历程里,构造解释技术也随着地震资料采集处理技术和精细地震解释手段的发展而有了更大的应用空间,其中三维精细地震解释技术的应用更是核心部分;储层分布规律的预测研究在油气资源的勘探中有重要的作用,储层分布规律的预测是在储层基本特征的基础上,通过地质模型正演、地震属性分析等技术来预测储层的物性、岩性以及含油气性等。储层分布规律研究是有效认识和评价储层并指导油田开发的重要技术。本论文以研究工区的地震资料为基础,以勘探地震学、层序地层学和构造地质学等为指导,从标定层位和建立地层格架入手,综合应用地震资料剖面的层位追踪技术、水平切片解释技术、连井剖面解释技术、断层叠合解释技术、相干体分析技术等,最终完成了该工区的三维地震资料精细构造解释工作,并逐步落实了工区内断层、断块和断鼻的分布情况。综合本工区的构造特征研究结论,以及通过地震属性分析手段和地质模型正演方法完成初步储层分布预测,为勘探目标预测及评价提供了可靠的基础数据资料。经过认真细致的工作得出以下主要认识:(1)在工区的三维地震资料的基础上,结合钻井、测井等资料进行了工区的精细构造解释,完成了2个目的层的区域构造图;共落实构造层圈闭9个,累计圈闭面积约12.397平方公里。圈闭类型主要有断鼻和断块,并对有利构造圈闭进行了详细描述;(2)通过速度分析,确定了周返地区投井引层的综合平均速度,准确标定了目的层的地震地质层位和重点层组的储层;(3)通过岩石物性统计分析,查明了不同岩石物性参数(声波速度、密度和波阻抗)随深度的变化规律。声波速度关系为:V油砂〈V水砂〈V泥岩〈V干砂;密度关系为:ρ油砂〈ρ水砂〈ρ干砂〈ρ泥岩;(4)通过模型正演等方法,确定了目的层段不同岩性界面的地震反射特征及地震分辨率,明确了不同岩性组合的储层地震响应特征。(1)大套盐韵律层段的盐层底与大套砂泥岩段的泥岩顶的界面,由于盐层的波阻抗值最小,泥岩的波阻抗值大,地震反射在剖面上形成强同相轴。(2)在砂泥岩层段中,厚砂岩底与泥岩顶的波阻抗差较大,是正值,形成较强反射同相轴,薄砂岩与泥岩的反射界面是一个综合响应,同相轴反射较弱。(3)在盐韵律层中的砂岩或与上覆盐岩紧邻的砂岩,随着渗透性砂岩厚度增加,主要表现为上方盐韵律底反射波振幅减弱;盐韵律层中的薄层砂岩,由于渗透性砂岩与盐岩的波阻抗大体相当,并且砂岩是以泥岩为过渡相变为盐岩的,在地震剖面上很难识别,要依据地质背景进行分析;(5)基于地质和地球物理资料将周30井区潜41油组划分为第(1)、第(2)、第(3)、第(4)、第(5)五个小层和Ⅰ、Ⅱ、Ⅲ三个油组,并且每个小层和油组在全井区可以对比。第(1)、第(2)小层以三角洲沉积粉砂岩和泥岩为主;第(4)小层以泥盐滩沉积为主;第(5)小层以三角洲沉积为主。将周16井潜32划分为第(1)、第(2)、第(3)三个小层和Ⅰ、Ⅱ、Ⅲ三个油组,并且各小层和油组可以进行全区对比。第(1)小层以三角洲沉积和泥盐滩沉积为主;第(2)、第(3)小层以三角洲沉积和湖相沉积为主;(6)依据钻井岩性、电测曲线及取芯资料,结合构造与层序分析成果,周30井区潜41油组和周16井区潜32油组沉积期主要有三角洲、泥盐滩、半咸水湖泊、泥膏滩等沉积相的发育。沉积中心主要以盐岩沉积为主,向外逐渐过渡为膏岩、泥岩沉积,为典型的盐湖沉积序列。三角洲沉积在靠近主控断裂一侧,大断裂下将盘附近地区发育三角洲前缘亚相亚相,总体上来看砂岩沉积范围小、粒度细、缺少粗粒砂岩沉积;(7)根据地震相分析、地震多属性分析等方法,对目的层进行储层预测,结合沉积相和已钻井小层数据,预测周16井区Eq32油组、周30井区Eq41油组砂体平面展布规律。
[Abstract]:In the course of the domestic oil industry decades of development, structural interpretation technology with the development of seismic data acquisition and processing technology and fine seismic interpretation methods and the application of more space, the 3D seismic interpretation technology application is the core part; prediction of reservoir distribution plays an important role in oil and gas the exploration of resources, prediction of reservoir distribution is based on the basic characteristics of the reservoir, through the geological modeling, seismic attribute analysis technique to predict the reservoir, lithology and hydrocarbon reservoir distribution. The research is effective to understand and evaluate the important technology of reservoir and guide the oil field development. This thesis is based on the seismic data of study area, the exploration seismology, sequence stratigraphy and structural geology as a guide, from the horizon calibration and the establishment of stratigraphic framework of comprehensive application Seismic data profiles of horizon tracing technology, horizontal slice technique, well profile interpretation, fault superimposed interpretation technology, coherent analysis technology, finally completed the work of fine structural interpretation of 3D seismic data in the area, and gradually implement the work of fault distribution, fault block and fault nose structure. Conclusion study on the characteristics of the area, and by means of seismic attribute analysis and geological modeling methods are completed preliminary layer distribution prediction can provide basic data storage, reliable for the prediction and evaluation of exploration targets. After careful and meticulous work obtained the following main conclusions: (1) based on 3D seismic data of the area. Combining the drilling and logging data of fine structure interpretation of the completed work area, regional tectonic map of 2 layer; the implementation of structural layer 9 traps, trap total area of about 12.397 square kilometers. The main trap types are fault nose and fault block, and the favorable structural traps are described in detail; (2) the speed of analysis, to determine the zhoufan area toujing lead layer comprehensive average speed, accurate calibration of purpose layer and key layer seismic geological horizon group reservoir; (3) through the analysis of rock physical statistics, find out the different petrophysical parameters (acoustic velocity, density and wave impedance) changes with depth. The acoustic velocity relationship is: V "V" V oil sands water sand mudstone "V dry sand; density: P P < p < sand sand sand mudstone (P <; 4) through forward modeling method, the seismic reflection characteristics and seismic resolution interval different lithologic interface, clear lithology reservoir seismic response characteristics. (1) a large set of salt rhythm layers with large salt bottom sand mudstone mudstone roof interface, because the value of wave impedance layer 灏，

本文编号：1471328