本文選題：鄂爾多斯盆地 + 延長(zhǎng)組��； 參考：《西北大學(xué)》2015年碩士論文

【摘要】：“富烴凹陷”目前已成為我國(guó)油氣領(lǐng)域研究的熱點(diǎn),優(yōu)質(zhì)烴源巖作為富烴凹陷形成的物質(zhì)基礎(chǔ),尤為被重視。大量的研究表明,優(yōu)質(zhì)烴源巖的形成與高的古生產(chǎn)力和有機(jī)質(zhì)的良好保存密切相關(guān),且相比較而言古生產(chǎn)力更為重要,為此,古生產(chǎn)力的研究,對(duì)進(jìn)一步探討優(yōu)質(zhì)烴源巖形成機(jī)理及富烴凹陷的形成環(huán)境有著重要的意義。鄂爾多斯盆地礦產(chǎn)資源豐富,油氣資源量巨大,其與延長(zhǎng)組富烴凹陷的存在有著十分緊密的關(guān)系。本論文以天環(huán)坳陷北部鹽56井及盆地南部露頭剖面為重點(diǎn)研究對(duì)象,開展了有機(jī)碳、密度、孔隙度、飽和烴色譜和孢粉化石等測(cè)試分析,并結(jié)合測(cè)井資料計(jì)算有機(jī)碳的方法,對(duì)延長(zhǎng)組優(yōu)質(zhì)烴源巖形成時(shí)期湖盆的古生產(chǎn)力進(jìn)行定性評(píng)價(jià)和定量恢復(fù)；根據(jù)孢粉測(cè)試結(jié)果對(duì)當(dāng)時(shí)的古氣候條件進(jìn)行了分析和恢復(fù)；并結(jié)合該期地質(zhì)事件沉積產(chǎn)物的地球化學(xué)特征,探討古生產(chǎn)力的控制因素及其對(duì)優(yōu)質(zhì)烴源巖形成的影響。以有機(jī)碳含量為指標(biāo),采取實(shí)驗(yàn)測(cè)試和測(cè)井計(jì)算兩種方法對(duì)古生產(chǎn)力進(jìn)行了定性評(píng)價(jià),研究表明兩種方法所獲得的有機(jī)碳數(shù)值吻合度較高,古生產(chǎn)力評(píng)價(jià)結(jié)果一致,說(shuō)明測(cè)井計(jì)算方法在該地區(qū)具有良好的應(yīng)用前景；以此為基礎(chǔ),選取合適的聯(lián)井剖面,根據(jù)測(cè)井資料計(jì)算有機(jī)碳含量的方法,分析了有機(jī)碳含量橫向演變特征。論文首次對(duì)長(zhǎng)7優(yōu)質(zhì)烴源巖發(fā)育期湖盆古生產(chǎn)力進(jìn)行了定量計(jì)算,結(jié)果表明,定性評(píng)價(jià)與定量計(jì)算之間結(jié)論一致,認(rèn)為延長(zhǎng)組優(yōu)質(zhì)烴源巖發(fā)育期湖盆古生產(chǎn)力較高,與國(guó)內(nèi)其它地區(qū)相比,明顯高出許多。根據(jù)定量計(jì)算的結(jié)果,結(jié)合前人劃分的湖泊營(yíng)養(yǎng)類型,對(duì)該期湖泊營(yíng)養(yǎng)類型進(jìn)行了劃分。以實(shí)驗(yàn)測(cè)試數(shù)據(jù)及測(cè)井計(jì)算的數(shù)據(jù)為基礎(chǔ),分析研究了長(zhǎng)73優(yōu)質(zhì)烴源巖有機(jī)碳平面展布特征和長(zhǎng)73時(shí)期湖盆古生產(chǎn)力分布特征。結(jié)合凝灰?guī)r沉積、底部熱液流體活動(dòng)及放射性異常等已有研究成果,研究這些事件性沉積產(chǎn)物與古生產(chǎn)力的空間分布特征,研究結(jié)果表明,以上三者與古生產(chǎn)力在平面展布上有良好的空間對(duì)應(yīng)關(guān)系；并根據(jù)事件沉積產(chǎn)物的地球化學(xué)分析結(jié)果,探討其對(duì)古生產(chǎn)力形成的作用,進(jìn)一步討論其對(duì)優(yōu)質(zhì)烴源巖形成的影響。綜合研究認(rèn)為,延長(zhǎng)組長(zhǎng)7段優(yōu)質(zhì)烴源巖發(fā)育時(shí)期,湖盆具有較高的古生產(chǎn)力,湖泊營(yíng)養(yǎng)類型為富養(yǎng)-超養(yǎng)型,該期高古生產(chǎn)力的形成,是當(dāng)時(shí)湖盆可容空間較大、氣候適宜、地質(zhì)事件廣泛發(fā)育等因素綜合影響的結(jié)果。這些因素為當(dāng)時(shí)水體生物的生長(zhǎng)提供廣闊的空間、適宜的氣候條件、能量和營(yíng)養(yǎng)物質(zhì)等,促使該期存在一次生物勃發(fā)事件,進(jìn)而形成較高的古生產(chǎn)力,為優(yōu)質(zhì)烴源巖的形成提供充足的物質(zhì)基礎(chǔ)。
[Abstract]:"hydrocarbon rich sag" has become a hot spot in the field of oil and gas in China, and high quality source rock, as the material foundation of hydrocarbon rich sag, has been paid more attention to. A large number of studies have shown that the formation of high quality source rocks is closely related to the high paleoproductivity and the good preservation of organic matter, and that paleoproductivity is more important than paleoproductivity. It is of great significance to further study the formation mechanism of high quality source rock and the forming environment of hydrocarbon rich sag. The Ordos Basin is rich in mineral resources and huge in oil and gas resources, which is closely related to the existence of hydrocarbon rich depression in Yanchang formation. In this paper, taking Yan-56 well in the northern Tianhuan depression and outcrop section in the southern part of the basin as the main research object, the organic carbon, density, porosity, saturated hydrocarbon chromatography and sporopollen fossils are tested and analyzed, and the method of calculating organic carbon is combined with the log data. The paleoproductivity of lacustrine basin during the formation of high quality hydrocarbon source rocks in Yanchang formation was qualitatively evaluated and quantitatively restored, and the paleoclimate conditions at that time were analyzed and restored according to the results of sporopollen test. Combined with the geochemical characteristics of sedimentary products of the geological events in this period, the controlling factors of paleoproductivity and their influence on the formation of high quality source rocks are discussed. Taking organic carbon content as index, two methods of experimental test and logging calculation were used to evaluate the paleoproductivity qualitatively. The results showed that the numerical agreement of organic carbon obtained by the two methods was high, and the results of paleoproductivity evaluation were consistent. It is shown that the well logging calculation method has a good application prospect in this area, and on this basis, the transverse evolution characteristics of organic carbon content are analyzed according to the method of calculating organic carbon content according to logging data. In this paper, the paleoproductivity of lacustrine basin during the development period of Chang7 high quality source rock is calculated for the first time. The results show that the conclusion between qualitative evaluation and quantitative calculation is in agreement with the conclusion that the paleoproductivity of lake basin during the development period of high quality source rock of Yanchang formation is higher. Compared with other parts of the country, it is much higher. According to the results of quantitative calculation, the nutrient types of lakes in this period were divided according to the nutrient types of lakes. Based on the experimental data and well logging data, the distribution characteristics of organic carbon in Chang73 high quality source rock and paleoproductivity distribution in Chang73 lacustrine basin were analyzed and studied. Combined with the existing research results of tuff deposition, hydrothermal fluid activity at the bottom and radioactive anomalies, the spatial distribution characteristics of these eventful sedimentary products and paleoproductivity are studied. The above three have a good spatial correspondence with paleoproductivity on the plane distribution, and based on the geochemical analysis results of the event sedimentary products, the effect on the formation of paleoproductivity is discussed, and the influence on the formation of high-quality source rocks is further discussed. The comprehensive study shows that the lake basin has high paleoproductivity during the period of the development of high quality hydrocarbon source rocks in member 7 of Yanchang formation, and the nutrient type of the lake is rich and hypertrophic. The formation of high paleoproductivity in this period is due to the large space of the lake basin and the suitable climate at that time. The result of comprehensive influence of factors such as extensive development of geological events. These factors provided broad space for the growth of organisms in the water body at that time, suitable climatic conditions, energy and nutrients, etc., which contributed to the existence of a biological boom event in that period, and thus formed a relatively high paleoproductivity. It provides sufficient material basis for the formation of high quality source rock.
【學(xué)位授予單位】：西北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 沈俊;馮慶來(lái);;廣西扶綏東攀剖面二疊紀(jì)—三疊紀(jì)之交古生產(chǎn)力演化[J];古地理學(xué)報(bào);2010年03期

2 劉惠民,李守軍,鄭德順,李學(xué)艷;東營(yíng)凹陷沙三段沉積期湖泊古生產(chǎn)力研究[J];石油勘探與開發(fā);2003年03期

3 吳楓,安芷生,曹軍驥;晚第四紀(jì)以來(lái)中緯度北太平洋古生產(chǎn)力記錄[J];海洋地質(zhì)與第四紀(jì)地質(zhì);2004年03期

4 陳建芳;李宏亮;金海燕;陳法錦;M G WIESNER;鄭連福;;南海若干古生產(chǎn)力替代指標(biāo)探討[J];海洋學(xué)研究;2010年01期

5 嚴(yán)德天;汪建國(guó);王卓卓;;揚(yáng)子地區(qū)上奧陶—下志留統(tǒng)生物鋇特征及其古生產(chǎn)力意義[J];西安石油大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年04期

6 嚴(yán)德天;汪建國(guó);張麗琴;;海相烴源巖中高活性鐵豐度對(duì)古生產(chǎn)力的指示[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年01期

7 胡瑋;盧宗盛;喻鵬;;陸相盆地古生產(chǎn)力研究現(xiàn)狀[J];地質(zhì)科技情報(bào);2010年06期

8 劉傳聯(lián),徐金鯉;生油古湖泊生產(chǎn)力的估算方法及應(yīng)用實(shí)例[J];沉積學(xué)報(bào);2002年01期

9 陳紹勇,田正隆,龍愛民,吳云華;南沙群島海域以鋇為指標(biāo)的古生產(chǎn)力研究[J];海洋學(xué)報(bào)(中文版);2005年04期

10 吳時(shí)國(guó),涂霞,羅又郎;海洋古生產(chǎn)力重建初探──以南沙群島海區(qū)NS90-103柱樣為例[J];海洋科學(xué);1996年02期

相關(guān)碩士學(xué)位論文 前2條

1 王磊;鄂爾多斯盆地延長(zhǎng)組長(zhǎng)7期湖盆古生產(chǎn)力恢復(fù)及其控制因素[D];西北大學(xué);2015年

2 王立成;西藏南部特提斯喜馬拉雅白堊系沉積特征及其與油氣資源潛力關(guān)系[D];中國(guó)地質(zhì)大學(xué)（北京）;2008年

，

本文編號(hào)：1830008