本文關(guān)鍵詞：大王莊油田沙二段灘壩砂層序地層特征及控制因素　出處：《成都理工大學(xué)》2015年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 層序地層 灘壩砂體 控制因素 沙二段 大王莊油田

【摘要】：灘壩砂是我國(guó)東部中新生代斷陷湖盆中一種非常重要的砂體類型,主要表現(xiàn)為砂體厚度小,橫向和縱向變化快,其規(guī)模、砂體發(fā)育程度遠(yuǎn)不及沖積扇、河流、三角洲、濁積扇等其它類型的砂體,過(guò)去對(duì)該類砂體的關(guān)注程度比較低,隨著勘探開發(fā)程度的不斷提高,后備接替儲(chǔ)量的需要,灘壩砂成為近十年來(lái)巖性油藏的重要勘探對(duì)象之一,尤其是在勝利油田,灘壩砂儲(chǔ)層已經(jīng)成為油田后備儲(chǔ)量和產(chǎn)量接替的重要目標(biāo)。但是,在不同的次一級(jí)凹陷中,灘壩砂的沉積特征、組合特征以及分布特征都完全不同,盡管前人曾經(jīng)對(duì)斷陷湖盆中灘壩儲(chǔ)集體有了較為深入的研究,也摸索出一些規(guī)律。然而,因?yàn)椴煌我患?jí)凹陷的構(gòu)造演化程度和發(fā)育歷史不完全一樣,因而,在不同的凹陷,必須從凹陷的具體演化特征出發(fā),探索沉積規(guī)律,從而預(yù)測(cè)灘壩砂的發(fā)育規(guī)律,有效指導(dǎo)油氣的勘探和開發(fā)。在車鎮(zhèn)凹陷沙二段的滾動(dòng)勘探中,已發(fā)現(xiàn)灘砂、壩砂、碳酸鹽巖灘壩等多種灘壩類型的儲(chǔ)層,并有良好的油氣顯示,儲(chǔ)集層多樣,沉積類型豐富。由于斷陷湖盆頻繁的構(gòu)造運(yùn)動(dòng)、復(fù)雜多變的盆地沉積基底構(gòu)造特征、沉積動(dòng)力學(xué)差別較大等原因,其灘壩砂體的成因及控砂機(jī)制具有自身的特點(diǎn)和發(fā)育規(guī)律。本文選擇車鎮(zhèn)凹陷沙二段灘壩作為研究對(duì)象,以現(xiàn)代沉積為參考,以層序地層學(xué)理論為指導(dǎo),以現(xiàn)代地球物理處理和解釋方法為手段,地質(zhì)與地球物理相結(jié)合,結(jié)合地球化學(xué)的分析資料,把古氣候條件、古地貌條件、古水深分析和構(gòu)造演化特征、石油地質(zhì)條件和油藏分布綜合研究,在充分吸收和消化前人研究成果的基礎(chǔ)上,摸清車鎮(zhèn)凹陷的層序發(fā)育特征、沉積相特征、灘壩砂的分布特征以及控制灘壩砂發(fā)育的因素,為滾動(dòng)勘探和開發(fā)提供可靠的地質(zhì)依據(jù),同時(shí)豐富灘壩砂研究的理論。取得的主要成果和認(rèn)識(shí)如下:(1)充分利用三維地震資料、測(cè)井資料、鉆井巖心和地球化學(xué)資料,依據(jù)不整合面的類型和特征、湖泛面的識(shí)別、沉積特征和旋回分析,將沙河街組劃分為5個(gè)級(jí)別層序組合。通過(guò)區(qū)域上的層序地層對(duì)比,發(fā)現(xiàn)層序地層和灘壩砂體之間具有較為明顯的相關(guān)關(guān)系,灘壩砂體在基準(zhǔn)面下降轉(zhuǎn)為上升的過(guò)程以及上升半旋回的下部最為發(fā)育。古地貌也影響了地層的發(fā)育情況,砂層組在構(gòu)造高點(diǎn)處地層變薄,砂層組減少;在構(gòu)造低部位,地層厚度較大,砂層發(fā)育多,一些砂層在高部位缺失。(2)詳細(xì)研究了沙二段的巖性特征、粒度分布特征、層理類型和生物擾動(dòng)組合特征,結(jié)合測(cè)井曲線特征和類型以及沉積構(gòu)造和巖性在縱向上的變化特征,對(duì)灘壩砂體進(jìn)行了詳細(xì)劃分,劃分出了砂壩主體微相、砂壩側(cè)緣微相、壩間微相、灘主體微相、灘間微相,建立了研究區(qū)的沉積模型。通過(guò)單井沉積相的分析和剖面沉積相對(duì)比,建立了研究區(qū)沙二段的沉積體系。通過(guò)對(duì)地震資料頻譜處理、波形分類、相位和振幅的處理和解釋,實(shí)現(xiàn)了薄砂體的識(shí)別和預(yù)測(cè)。通過(guò)對(duì)地震波形的自組織神經(jīng)網(wǎng)絡(luò)分析,建立了能代表全區(qū)地震道形狀變化的典型梯度序列,通過(guò)瞬時(shí)頻率分析技術(shù)振幅疊合屬性分析技術(shù),建立了砂巖楔狀體的正演模型,識(shí)別了薄層砂體的分布。(3)全面分析了灘壩砂體發(fā)育的控制因素,從古氣候條件、古地貌條件、古水深的計(jì)算、剝蝕量的恢復(fù)、地層厚度的壓實(shí)校正等方法綜合分析了研究區(qū)影響灘壩砂體分布的影響和控制因素,確定了半深湖和淺湖的分界線。認(rèn)為有利于灘壩砂體發(fā)育的是斜坡帶以及波浪帶及其附近的溝谷地帶和古地貌高地。(4)根據(jù)現(xiàn)今油氣藏的發(fā)育特征和分布特征,結(jié)合沉積、層序和構(gòu)造分布以及有利灘壩砂體發(fā)育的位置,分析認(rèn)為研究區(qū)沙二段成藏的主要控制因素為:油源斷層控制了油氣的運(yùn)移,油源斷裂附近及連通的砂體是油氣富集的地方,鼻狀構(gòu)造為油氣運(yùn)移的主要指向區(qū),從而影響了油氣的平面分布規(guī)律,儲(chǔ)層的優(yōu)劣與斷層的配置決定了油氣藏類型及縱向分布,綜合分析地質(zhì)因素和成藏因素,總結(jié)了研究區(qū)油氣成藏的模式為階梯運(yùn)移、扇形成藏。
[Abstract]:The beach bar sand is in the east of the new generation of off one of the most important types of sand bodies in the basin, mainly for the thickness of sand body is small, transverse and longitudinal changes quickly, the scale, the development degree of sand than the alluvial fan, river, Delta, turbidite fan and other types. In the past the degree of concern on this kind of sand body is relatively low, with the development of exploration and improvement of the degree of reserve replacement reserves, beach sand dam has become one of the most important exploration targets for lithologic reservoir in recent ten years, especially in Shengli Oilfield, beach sand dam reservoir has become an important goal of oil reserves and production replacement however, in different sub sag, the sedimentary characteristics of beach sand dam, assemblages and distribution characteristics are completely different, although once on the lake beach dam reservoir fault depression has more in-depth research, also found out some rules. However, because A different tectonic depression evolution and development history is not exactly the same, therefore, in different depression, we must proceed from the specific characteristics of the evolution of the sag, explore the development regularity of deposition, thus predicting beach sand dam, effectively guide the exploration and development of oil and gas. In the two section of rolling exploration of Chezhen Sag sand that has been found in beach sand. The sand reservoir dam, various types of carbonate beach and bar beach bar, and a good show of oil and gas reservoir, diverse, abundant sedimentary types. The tectonic movement of faulted basin frequently, the basin basement tectonics in the complex, large differences due to sedimentary dynamics and the beach bar sand body genesis and sand control mechanism has its own characteristics and development law. This paper chooses Chezhen Sag two sections of sand beach dam as the research object, based on modern deposition for reference, based on the sequence stratigraphy theory as the guide to modern geophysics Processing and interpretation methods as a means of Geology and Geophysics, combined with geochemical analysis data, the ancient climate, ancient landform, characteristics and tectonic evolution of the paleo water depth, comprehensive study on petroleum geological conditions and reservoir distribution, based on the digestion and absorption of the previous research results, the development characteristics of depression sequence to find out the town car, the characteristics of sedimentary facies of beach bar sand distribution features and control factors for the development of beach bar sand, provides the reliable geological basis for rolling exploration and development, at the same time rich beach sand dam theory research. The main results are as follows: (1) make full use of 3D seismic data, well logging data. Core drilling and geochemical data, on the basis of the types and characteristics of unconformity surface, flooding surface recognition, analysis of sedimentary characteristics and cycle, divides Shahe Street group into 5 levels. Through sequence combination region on the layer Sequence stratigraphic correlation, have obvious correlation between sequence stratigraphy and beach bar sand, beach bar sand decreased as the rise process development and lower the ascending half cycle is most in datum. Paleogeomorphology also affected the development of strata, sand group in the construction of high stratum thinning the sand group decreased; in the low parts of the structure, stratum thickness, sandstone development, some sand in the high place of missing. (2) a detailed study of the lithologic characteristics of Sha two section, grain size distribution, bedding types and bioturbation assemblages, changes according to the characteristics of logging curves and types, sedimentary structure and lithology in the longitudinal direction on the beach bar sand body is divided in detail, divided into the main sand dam microfacies, sand dam edge microfacies, dam microfacies, main beach microfacies, inter beach microfacies, sedimentary model established in the study area. Through the single well sedimentary facies division Contrast analysis and sedimentary depositional system, established two research area of sand. Based on seismic data spectrum processing, waveform classification, processing and interpretation of amplitude and phase, the recognition and prediction of thin sand bodies. Through the analysis of self-organizing neural network for seismic waveform, the typical gradient series is built to on behalf of the seismic shape changes, through the analysis of the instantaneous frequency amplitude Superposition Technology attribute analysis technology, established a forward model sand wedge, identify the distribution of thin sand. (3) a comprehensive analysis of the beach bar sand body development control factors, the ancient climate, ancient landform, calculation the ancient water depth, denudation recovery, compaction strata thickness correction method of the comprehensive analysis of the influence of beach bar sand body distribution and control factors affecting the study area, determine the boundary of semi deep lake and shallow lake. That is conducive to the development of beach bar sand body The slope zone and wave zone and the nearby Valley and paleogeomorphology highlands. (4) according to the features of the present development of oil and gas accumulation and distribution characteristics of sedimentary sequence and structure, distribution and position of beach bar sand body development, analysis of the study area that Sha two section into the main controlling factors of reservoir are as follows: the migration of oil source faults control the oil and gas, near the oil source faults and connected sand body is the oil and gas accumulation place, nose structure as the main target areas of oil and gas migration, thus affecting the plane distribution of oil and gas, the pros and cons of fault reservoir configuration determines the type of oil and gas reservoir the longitudinal distribution, comprehensive analysis of geological factors and reservoir factors, summarizes the research of hydrocarbon accumulation model for step migration, accumulation of sector.

【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13;P539.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 曾勝?gòu)?qiáng);王劍;陳明;付修根;吳滔;熊興國(guó);;北羌塘盆地索瓦組上段的時(shí)代、古氣候及石油地質(zhì)特征[J];現(xiàn)代地質(zhì);2012年01期

2 林治家;陳多福;劉芊;;海相沉積氧化還原環(huán)境的地球化學(xué)識(shí)別指標(biāo)[J];礦物巖石地球化學(xué)通報(bào);2008年01期

3 許輝群;桂志先;;利用測(cè)井約束地震反演預(yù)測(cè)砂體展布[J];石油天然氣學(xué)報(bào)(江漢石油學(xué)院學(xué)報(bào));2006年03期

4 顧家裕;陸相盆地層序地層學(xué)格架概念及模式[J];石油勘探與開發(fā);1995年04期

5 鄧宏文;美國(guó)層序地層研究中的新學(xué)派──高分辨率層序地層學(xué)[J];石油與天然氣地質(zhì);1995年02期

6 裘亦楠;中國(guó)陸相碎屑巖儲(chǔ)層沉積學(xué)的進(jìn)展[J];沉積學(xué)報(bào);1992年03期

，

本文編號(hào)：1383671