發(fā)布時(shí)間：2018-11-02 08:15

【摘要】：深水沉積砂巖儲層是近年來全球油氣勘探重點(diǎn)領(lǐng)域之一,對于深水沉積模式認(rèn)識、沉積類型劃分、儲層分布規(guī)律及宏觀演化規(guī)律能否實(shí)現(xiàn)系統(tǒng)深入的認(rèn)知也成為制約全球油氣勘探獲得更多突破的關(guān)鍵問題之一。以典型深水沉積廣泛發(fā)育的西非被動(dòng)大陸邊緣尼日爾三角洲盆地和剛果扇盆地為研究區(qū),以地震資料為主,鉆井資料為輔,開展針對性的深水沉積體系層序界面識別,明確研究區(qū)層序及體系域劃分方案,建立深水沉積層序地層格架;綜合2個(gè)研究區(qū)的深水沉積特征,探索建立了一套西非地區(qū)的深水沉積類型的劃分方案,將其劃分為陸坡峽谷、塊體流、水道體、朵葉體、半深海泥5種亞相;將塊體流細(xì)化為滑移體和滑塌碎屑流2種微相,將水道體進(jìn)一步劃分為高侵蝕充填型水道、低侵蝕過路加積型水道、過路高彎度水道、廢棄水道、堤岸-漫溢5種微相,將朵葉體細(xì)分為末端朵葉和決口扇朵葉2種微相;同時(shí)系統(tǒng)總結(jié)解剖了各微相的巖性組合、地震反射及平面發(fā)育特征;深入分析了研究區(qū)深水沉積體系的宏觀演化特征及展布規(guī)律,認(rèn)識到尼日爾三角洲盆地深水沉積體系中水道體和朵葉體均有發(fā)育,自下向上,隨著相對海平面先下降再上升的過程,早期主要發(fā)育朵葉體沉積,晚期則轉(zhuǎn)變?yōu)橐园l(fā)育大型濁積水道為主。剛果扇盆地深水沉積則主要為水道體沉積,朵葉體較少發(fā)育,早期水道規(guī)模小,中期開始發(fā)育多支復(fù)合水道并呈退積趨勢,水道發(fā)育程度逐漸降低,至晚期水道能量及侵蝕能力復(fù)又轉(zhuǎn)強(qiáng),甚至形成較大的陸坡峽谷及多支水道體。
[Abstract]:Deep-water sedimentary sandstone reservoir is one of the key fields of global oil and gas exploration in recent years. Whether the reservoir distribution law and the macroscopic evolution law can realize the systematic in-depth cognition also becomes one of the key problems which restricts the global oil and gas exploration to obtain more breakthrough. Based on the Niger Delta basin and Congo fan basin on the passive continental margin of West Africa, where the typical deep-water sediments are widely developed, the sequence interface identification of the deep-water sedimentary system is carried out, with seismic data as the main source and drilling data as the auxiliary. The research area sequence and the system tract division plan are defined, and the deep-water sedimentary sequence stratigraphic framework is established. Based on the characteristics of deep-water sediments in two study areas, a set of deep-water sedimentary types in West Africa was established, which was divided into five subfacies: slope canyon, block current, waterway body, flower leaf body and semi-deep sea mud. The block flow is divided into two kinds of microfacies: slip body and sloughing debris flow. The waterway body is further divided into five microfacies: high erosion filling channel, low erosion crossing road plus accumulation channel, crossing high bend channel, abandoned waterway, dike bank and overflowing 5 kinds of microfacies. The flower body was subdivided into two microfacies: the terminal leaf and the cleft leaf. At the same time, the lithologic assemblage, seismic reflection and plane development characteristics of each microfacies are systematically summarized and dissected. The macroscopical evolution and distribution of deep-water sedimentary system in the study area are analyzed in depth. It is recognized that both watercourse body and flower leaf body have developed in the deep-water sedimentary system of Niger Delta basin and are upward from the bottom down. With the process of relative sea level first falling and then rising, the early stage is dominated by the development of flower leaf bodies, and in the late stage, the development of large turbid hydrops is dominant. In the Congo fan basin, the deep-water sediments are mainly watercourse bodies, and the flower leaf bodies are less developed, the scale of the early waterways is small, and the multi-branch composite waterways are developed in the middle of the period, and the development degree of the watercourses decreases gradually. In the late stage, the energy and erosion capacity of waterways were strengthened, and even large slope canyons and multi-channel bodies were formed.
【作者單位】： 中海油研究總院;
【基金】：國家“十二五”科技重大專項(xiàng)“非洲、中東重點(diǎn)勘探區(qū)油氣地質(zhì)評價(jià)及關(guān)鍵技術(shù)研究”(2011ZX05030-003) 國家“十三五”科技重大專項(xiàng)“西非和南美海域重點(diǎn)區(qū)油氣地質(zhì)評價(jià)及關(guān)鍵技術(shù)研究”(2017ZX05032-001)
【分類號】：P618.13

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 Dorrik A.V.Stow,豐全會(huì);深水沉積體系:21世紀(jì)的新模式[J];海洋地質(zhì)動(dòng)態(tài);2000年05期

2 鄧強(qiáng);;深水沉積研究綜述及未來方向[J];西安科技大學(xué)學(xué)報(bào);2014年01期

3 龐雄;陳長民;朱明;何敏;柳保軍;申俊;連世勇;;深水沉積研究前緣問題[J];地質(zhì)論評;2007年01期

4 王亞輝;趙鵬肖;左倩媚;鐘澤紅;李俊良;;淺析深水沉積理論[J];四川地質(zhì)學(xué)報(bào);2010年02期

5 尹繼全;衣英杰;;地震沉積學(xué)在深水沉積儲層預(yù)測中的應(yīng)用[J];地球物理學(xué)進(jìn)展;2013年05期

6 楊飛;章學(xué)剛;張林科;;深水沉積體系內(nèi)部結(jié)構(gòu)的地震沉積學(xué)研究[J];石油物探;2012年03期

7 吉磊;贛西南寒武紀(jì)—奧陶紀(jì)深水沉積[J];地質(zhì)學(xué)報(bào);1994年02期

8 彭勇民,汪名杰,姚鵬;三江地區(qū)北部三疊紀(jì)深水沉積及其意義[J];巖石礦物學(xué)雜志;2000年04期

9 劉軍;龐雄;顏承志;柳保軍;胡璉;李元平;韓晉陽;;南海北部陸坡白云深水區(qū)深水沉積結(jié)構(gòu)要素[J];吉林大學(xué)學(xué)報(bào)(地球科學(xué)版);2011年04期

10 晉慧娟,李育慈,李菊英;新疆準(zhǔn)噶爾盆地西北緣石炭紀(jì)深水沉積的發(fā)現(xiàn)及其沉積特征[J];沉積學(xué)報(bào);1987年03期

相關(guān)會(huì)議論文 前1條

1 張興陽;顧家裕;羅平;高振中;何幼斌;羅順社;;內(nèi)波沉積作用—深水沉積物波的成因研究[A];2001年全國沉積學(xué)大會(huì)摘要論文集[C];2001年

相關(guān)博士學(xué)位論文 前1條

1 陳慧;南海西北次海盆西北陸緣深水沉積體系及其演化研究[D];中國地質(zhì)大學(xué);2014年

相關(guān)碩士學(xué)位論文 前1條

1 苑坤;澳大利亞Vulcan次盆南部Puffin組深水沉積體系展布及有利勘探區(qū)帶預(yù)測[D];中國地質(zhì)大學(xué)（北京）;2010年

，

本文編號：2305449