本文關(guān)鍵詞： 精細構(gòu)造解釋 地質(zhì)模型正演 屬性分析 儲層分布預(yù)測　出處：《長江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在國內(nèi)石油工業(yè)發(fā)展幾十年的歷程里,構(gòu)造解釋技術(shù)也隨著地震資料采集處理技術(shù)和精細地震解釋手段的發(fā)展而有了更大的應(yīng)用空間,其中三維精細地震解釋技術(shù)的應(yīng)用更是核心部分;儲層分布規(guī)律的預(yù)測研究在油氣資源的勘探中有重要的作用,儲層分布規(guī)律的預(yù)測是在儲層基本特征的基礎(chǔ)上,通過地質(zhì)模型正演、地震屬性分析等技術(shù)來預(yù)測儲層的物性、巖性以及含油氣性等。儲層分布規(guī)律研究是有效認識和評價儲層并指導(dǎo)油田開發(fā)的重要技術(shù)。本論文以研究工區(qū)的地震資料為基礎(chǔ),以勘探地震學(xué)、層序地層學(xué)和構(gòu)造地質(zhì)學(xué)等為指導(dǎo),從標(biāo)定層位和建立地層格架入手,綜合應(yīng)用地震資料剖面的層位追蹤技術(shù)、水平切片解釋技術(shù)、連井剖面解釋技術(shù)、斷層疊合解釋技術(shù)、相干體分析技術(shù)等,最終完成了該工區(qū)的三維地震資料精細構(gòu)造解釋工作,并逐步落實了工區(qū)內(nèi)斷層、斷塊和斷鼻的分布情況。綜合本工區(qū)的構(gòu)造特征研究結(jié)論,以及通過地震屬性分析手段和地質(zhì)模型正演方法完成初步儲層分布預(yù)測,為勘探目標(biāo)預(yù)測及評價提供了可靠的基礎(chǔ)數(shù)據(jù)資料。經(jīng)過認真細致的工作得出以下主要認識:(1)在工區(qū)的三維地震資料的基礎(chǔ)上,結(jié)合鉆井、測井等資料進行了工區(qū)的精細構(gòu)造解釋,完成了2個目的層的區(qū)域構(gòu)造圖;共落實構(gòu)造層圈閉9個,累計圈閉面積約12.397平方公里。圈閉類型主要有斷鼻和斷塊,并對有利構(gòu)造圈閉進行了詳細描述;(2)通過速度分析,確定了周返地區(qū)投井引層的綜合平均速度,準(zhǔn)確標(biāo)定了目的層的地震地質(zhì)層位和重點層組的儲層;(3)通過巖石物性統(tǒng)計分析,查明了不同巖石物性參數(shù)(聲波速度、密度和波阻抗)隨深度的變化規(guī)律。聲波速度關(guān)系為:V油砂〈V水砂〈V泥巖〈V干砂;密度關(guān)系為:ρ油砂〈ρ水砂〈ρ干砂〈ρ泥巖;(4)通過模型正演等方法,確定了目的層段不同巖性界面的地震反射特征及地震分辨率,明確了不同巖性組合的儲層地震響應(yīng)特征。(1)大套鹽韻律層段的鹽層底與大套砂泥巖段的泥巖頂?shù)慕缑?由于鹽層的波阻抗值最小,泥巖的波阻抗值大,地震反射在剖面上形成強同相軸。(2)在砂泥巖層段中,厚砂巖底與泥巖頂?shù)牟ㄗ杩共钶^大,是正值,形成較強反射同相軸,薄砂巖與泥巖的反射界面是一個綜合響應(yīng),同相軸反射較弱。(3)在鹽韻律層中的砂巖或與上覆鹽巖緊鄰的砂巖,隨著滲透性砂巖厚度增加,主要表現(xiàn)為上方鹽韻律底反射波振幅減弱;鹽韻律層中的薄層砂巖,由于滲透性砂巖與鹽巖的波阻抗大體相當(dāng),并且砂巖是以泥巖為過渡相變?yōu)辂}巖的,在地震剖面上很難識別,要依據(jù)地質(zhì)背景進行分析;(5)基于地質(zhì)和地球物理資料將周30井區(qū)潛41油組劃分為第(1)、第(2)、第(3)、第(4)、第(5)五個小層和Ⅰ、Ⅱ、Ⅲ三個油組,并且每個小層和油組在全井區(qū)可以對比。第(1)、第(2)小層以三角洲沉積粉砂巖和泥巖為主;第(4)小層以泥鹽灘沉積為主;第(5)小層以三角洲沉積為主。將周16井潛32劃分為第(1)、第(2)、第(3)三個小層和Ⅰ、Ⅱ、Ⅲ三個油組,并且各小層和油組可以進行全區(qū)對比。第(1)小層以三角洲沉積和泥鹽灘沉積為主;第(2)、第(3)小層以三角洲沉積和湖相沉積為主;(6)依據(jù)鉆井巖性、電測曲線及取芯資料,結(jié)合構(gòu)造與層序分析成果,周30井區(qū)潛41油組和周16井區(qū)潛32油組沉積期主要有三角洲、泥鹽灘、半咸水湖泊、泥膏灘等沉積相的發(fā)育。沉積中心主要以鹽巖沉積為主,向外逐漸過渡為膏巖、泥巖沉積,為典型的鹽湖沉積序列。三角洲沉積在靠近主控斷裂一側(cè),大斷裂下將盤附近地區(qū)發(fā)育三角洲前緣亞相亞相,總體上來看砂巖沉積范圍小、粒度細、缺少粗粒砂巖沉積;(7)根據(jù)地震相分析、地震多屬性分析等方法,對目的層進行儲層預(yù)測,結(jié)合沉積相和已鉆井小層數(shù)據(jù),預(yù)測周16井區(qū)Eq32油組、周30井區(qū)Eq41油組砂體平面展布規(guī)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 灝，

本文編號：1471328