本文選題：儲層預測　切入點：地震屬性分析　出處：《長江大學》2015年碩士論文　論文類型：學位論文

【摘要】：地震儲層預測是以高分辨率地震和測井資料為基礎,以地質與鉆井資料為參考,波阻抗反演和屬性分析為主要技術來進行的,因此,波阻抗反演的效果和屬性參數(shù)的運用成為儲層預測的關鍵。大南洼陷地區(qū)是一個陸相斷陷盆地,區(qū)內(nèi)構造比較復雜,整體斷裂較為發(fā)育,具有發(fā)育地層巖性圈閉的有利條件。而地層巖性圈閉的落實和評價缺乏有效的技術手段,其中最為突出的是構造細節(jié)不清,有利沉積相帶和有效儲層發(fā)育范圍不明確,地層巖性圈閉成藏規(guī)律不明確等。通過本次分析研究得知,大南洼陷雙二段的油氣顯示結果最好,其次為雙一段,最差的為雙三段。雙陽組油氣主要分布在研究區(qū)北部,中部和南部鉆井較少,尤其是南部幾乎是空白。鹿鄉(xiāng)斷陷雙陽組烴源巖條件較好,暗色泥巖厚度大,有機質豐度中等,且處于成熟階段。其中雙三段暗色泥巖厚度最大,其次為雙一段；雙一段和雙二段有機質豐度和有機質成熟度略高于雙三段。綜合評價表明,雙一段為最有利生油層位,其次是雙三段；鹿鄉(xiāng)斷陷大南洼陷為最有利生油區(qū),其次為盆地西南部及盆地中北部部分地區(qū),東部為相對較差生油區(qū)。鹿鄉(xiāng)斷陷雙陽組儲層成因類型主要為扇三角洲和水下扇砂體,構造主要以斷塊圈閉為主。本次研究充分利用現(xiàn)有各種資料,以地質、測井、油藏工程等多學科為理論指導,綜合應用鉆井、地震、測井、化驗分析及生產(chǎn)動態(tài)資料,以大南洼陷為主要研究區(qū),重點對基巖潛山、雙一段底礫巖、雙二段砂巖和奢一段扇體展開工作,形成了一套較完整的研究方法,較好的指導了該區(qū)的分析研究,研究方法也可以為其它工區(qū)開展類似研究作為借鑒。通過本次研究,取得的主要成果及認識如下：1、根據(jù)大南洼陷的資料分析,結合以往該區(qū)的地質、沉積方面的解釋成果,綜合層序界面、內(nèi)部結構以及沉積演化的特點,雙陽組至萬昌組可歸結為雙陽組、奢嶺組、永吉組、萬昌組等四個二級層序,10個三級層序。2、從地層對比分析來看,雙陽組在大南洼陷全區(qū)范圍內(nèi)均有分布,厚度變化較大,鉆井揭露厚度為500-600m,巖性為黑-灰色泥巖、粉砂巖、細砂巖-砂礫巖,底部為礫巖。縱向上分為三個巖性段,與下伏前第三系呈不整合接觸。3、根據(jù)地震速度譜解釋結果分析,建立了全區(qū)的3D平均速度場。通過對地震速度場提取的時深曲線和聲波測井計算的時深曲線對比分析得知,速度趨勢基本一致,誤差較小,為構造解釋和儲層預測提供了可靠的3D速度場資料。4、大南洼陷是受控于西北緣及東南緣斷層擠壓形成,構造后期改造作用比較大；研究區(qū)圈閉基本上分為3類：構造圈閉、地層圈閉和巖性圈閉。5、工區(qū)雙陽組地層砂巖儲層比較發(fā)育,多集中在西北和東南兩大斷層附近,從反演獲得的砂巖厚度分析圖看出,雙二段砂巖厚度最大達到將近400m,在X27井區(qū)塊和洼陷的南部砂巖較厚,在2號斷層附近砂巖相對偏薄,統(tǒng)計計算的結果和鉆井實際獲得的砂巖厚度對比,吻合率達到80%以上；雙一段砂體發(fā)育比較均一,砂體的最大厚度將近200m,這個厚度也只是在L2井區(qū)附近出現(xiàn),其它部位砂巖厚度都是在50-100m之間。6、工區(qū)油層主要在奢嶺組和雙陽組,特點是油層多而薄,油藏以構造-巖性為主：生油層主要是在雙一段上部泥巖和雙三段的大套泥巖,儲層以雙一段底礫巖和雙二段的砂巖為主,洼陷的沉積中心由早期的南面逐漸往北遷移,形成目前的格局。7、合適的研究方法將是這種小型洼陷尋找有利目標的重要手段。本次研究工作針對大南洼陷的地震、地質資料特點,以層序地層學理論、斷陷盆地沉積模式為指導,在等時地層格架基礎上對大南洼陷整體開展構造、儲層、油氣成藏及油氣分布規(guī)律研究,同時尋找到適合本地區(qū)的反演方法和敏感屬性,確立了有利區(qū)帶。
[Abstract]:Seismic reservoir prediction is based on the high resolution seismic and well logging data, geological and drilling data as a reference, wave impedance inversion and attribute analysis is the main technique to use, therefore, the effect of wave impedance inversion and attribute parameter becomes the key of reservoir prediction. The south region is a sag faulted basin a continental area, the complex structure, the overall fracture more developed, with favorable conditions for the development of stratigraphic and lithologic traps. And the implementation and evaluation of lithologic stratigraphic traps and lack of effective technical means, the most prominent is the details are not clear, the favorable sedimentary facies and reservoir development scope is not clear, stratigraphic and lithologic traps accumulation is not clear. Through the research and analysis that the oil and gas in South double two section showed the best, followed by the first member, the worst for the double three. Shuangyang oil is mainly distributed in the study group Area in the northern, central and southern less drilling, especially the south is almost blank. In the condition of hydrocarbon source rocks of Shuangyang Formation in Luxiang fault well. The thickness of dark mudstone, organic matter abundance, and in the mature phase. The thickness of dark mudstone double three maximum, followed by a pair of double and double segment; the two section of the abundance of organic matter and organic matter maturity is slightly higher than the double three. Comprehensive evaluation shows that the first member for the most favorable source reservoir, followed by the double three section; Lu Xiang rift South sag is the most favorable source areas, followed by parts of the northern basin and the southwest, East is relatively poor source Lu Xiang rift area. Genetic type reservoir of Shuangyang Formation is mainly fan delta and underwater fan sand body structure, mainly in fault block traps. This study makes full use of the existing data, based on geological, logging, reservoir engineering and other disciplines as the theoretical guidance, the comprehensive application of drilling Well, well logging, seismic, laboratory analysis and dynamic production data, to the South sag is the main research area, focusing on the bedrock of Qianshan, the first member of two double bottom conglomerate, sandstone and a luxury fan work, formed a relatively complete set of research methods, better guidance to the analysis and Research on this area. The research method can also be used as reference for other similar research work area. Through this study, the main results are as follows: 1, according to the analysis of the South sag, combined with the previous data, the geological deposition, the interpretation results of interface layer order, the internal structure and sedimentary evolution characteristics of Shuangyang Formation to Wanchang group can be attributed to the Shuangyang group, Sheling group, Yongji group, Wanchang group four two level sequence, 10 three level sequence from.2, stratigraphic correlation analysis, Shuangyang group were distributed in the south in the region, large variation of thickness, drilling Expose the thickness of 500-600m, the lithology is black and grey mudstone, siltstone, fine sandstone, glutenite, bottom conglomerate. Vertically divided into three lithologic sections, has an unconformable contact with the underlying.3 before third, according to the interpretation of the results of seismic velocity spectrum analysis, 3D was established by average velocity field in the region. The calculation of seismic velocity field extraction time depth curve and acoustic logging time depth curve comparison analysis showed that the speed of a similar trend, less error, provides the reliable data of.4 3D velocity field for structural interpretation and reservoir prediction, the South sag is controlled by the northwestern and southeastern fault extrusion to form the late reformation, construction relatively large; the traps are basically divided into 3 categories: structural traps, stratigraphic traps and lithologic traps in.5 area, Shuangyang Formation sandstone reservoir development, more concentrated in the vicinity of the northwest and Southeast two faults, retrieved from sandstone The thickness of sandstone thickness analysis diagram, double two maximum reached nearly 400m in X27 well block and the southern sag are thick sandstone, in the vicinity of fault No. 2 relatively thin sandstone, sandstone thickness contrast statistical calculation results and actual drilling is obtained, the coincidence rate reached above 80%; a double sand body development uniform, the maximum thickness of sand body thickness is nearly 200m, this also appeared in the vicinity of L2 well area, other parts of the sandstone thickness are between 50-100m.6, the main reservoir area in Shuangyang Sheling group and group, and is characterized in multi layer thin reservoir to lithologic reservoir is mainly in the main: the first member the upper mudstone and double three section of mudstone, reservoir in the first member and the two section of the double bottom conglomerate sandstone, the sedimentary center in the south to the north gradually from early migration, formation of the current pattern of.7, the appropriate research methods will be the small wa In an important means to find favorable targets. The research work in the South sag of the earthquake, the geological data characteristics, the theory of sequence stratigraphy, sedimentary rift basin model as a guide, stratigraphic framework on the basis of the overall development structure in the South sag, such as reservoir, oil and gas and oil and gas distribution of reservoirs. At the same time to find the inversion method for the region and the sensitive attribute, establish favorable zones.

【學位授予單位】：長江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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