本文關(guān)鍵詞：上揚(yáng)子地區(qū)五峰組—龍馬溪組優(yōu)質(zhì)頁巖沉積主控因素　出處：《天然氣工業(yè)》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 上揚(yáng)子地區(qū) 晚奧陶世—早志留世 優(yōu)質(zhì)頁巖 斑脫巖 海平面 古生產(chǎn)力 沉積速率 主力勘探層系

【摘要】：為揭示上揚(yáng)子地區(qū)優(yōu)質(zhì)頁巖的分布規(guī)律和沉積主控因素,基于四川盆地南部(以下簡稱川南)野外露頭剖面和鉆井資料,結(jié)合地球化學(xué)元素測試和生物地層分析結(jié)果,從板塊運(yùn)動(dòng)、海平面變化、古生產(chǎn)力、沉積速率、古地理環(huán)境等方面研究了該區(qū)上奧陶統(tǒng)五峰組—下志留統(tǒng)龍馬溪組頁巖的分布規(guī)律和沉積主控因素。結(jié)果表明:①揚(yáng)子地塊與周緣地塊的碰撞、拼合及板內(nèi)變形作用總體呈現(xiàn)早期和緩、晚期強(qiáng)烈,西北部和緩、東南部強(qiáng)烈的態(tài)勢,造就了上揚(yáng)子沉降沉積中心向西北遷移,川南海域封閉性出現(xiàn)早期弱、晚期強(qiáng)的演化特征;②海平面在奧陶紀(jì)—志留紀(jì)之交呈現(xiàn)由深→淺→深→淺的旋回變化,早期的高海平面與穩(wěn)定海盆配置,形成了海底大面積缺氧、有機(jī)質(zhì)有效保存的構(gòu)造沉積空間;③受構(gòu)造活動(dòng)和海域封閉性的影響,川南海域古生產(chǎn)力呈現(xiàn)早期高、晚期低的變化趨勢,沉積速率則表現(xiàn)為早期慢、晚期快的變化特點(diǎn);④富有機(jī)質(zhì)、富硅質(zhì)頁巖的規(guī)模沉積和分布主要受緩慢沉降的穩(wěn)定海盆、相對(duì)較高的海平面、半封閉水體和低沉積速率等因素的控制。結(jié)論認(rèn)為:①該區(qū)優(yōu)質(zhì)頁巖多期疊置、橫向連片、沉積時(shí)代向西北不斷變新,優(yōu)質(zhì)頁巖形成主要在五峰期—魯?shù)て?其次為埃隆期;②主力勘探層系在川南—川東坳陷區(qū)為五峰組—魯?shù)るA,在威遠(yuǎn)地區(qū)為魯?shù)るA—埃隆階,在川中—川北地區(qū)則為五峰組—特列奇階。
[Abstract]:For the distribution and deposition of the master to reveal the upper Yangtze area of shale factors, southern Sichuan basin (hereinafter referred to as Sichuan) based on the outcrop and drilling data, combined with the geochemical test and biostratigraphic analysis results from plate movement, sea level change, paleo productivity, deposition rate, paleogeographic environment etc. study on the distribution and deposition of the main control area of Upper Ordovician five peak - Lower Silurian Longmaxi shale factors. The results show that the collision of the Yangtze block and the surrounding block, split and intraplate deformation in general is early and late, strong, northwest and Southeast, strong the situation, created the sedimentation center migrated to the northwest, South Sichuan area closed early weak, the evolution characteristics of late strong; the sea level in the Ordovician Silurian to show from deep to shallow to deep and shallow. To change the high sea level and stable basin configuration early, forming a large area of seafloor anoxia, tectonic and sedimentary organic matter preservation space effectively; the waters closed by tectonic movement and the influence of Sichuan, the southern waters of paleo productivity showed an early trend of advanced high, low, deposition rate is early slow. The change characteristics of advanced fast; the organic rich, scale deposition and distribution of rich siliceous shale is mainly affected by the stable slow subsidence of the basin, the sea level is relatively high, control of semi enclosed water bodies and low deposition rate and other factors. The conclusion is: the area of shale multi-phase superimposition and sedimentary Era to laterally. The constant changes of shale formation, mainly in the five peak - Lu Danqi, followed by eilon period; the main exploration strata in South Sichuan Sichuan depression area five peak group - Lu Danjie, in the Weiyuan area for Lu Dan eilon - order order, in Sichuan In North Sichuan area is five of peak - telychian.

【作者單位】： 中國石油勘探開發(fā)研究院;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(編號(hào):2013CB228001) 國家科技重大專項(xiàng)(編號(hào):2011ZX05018-001)
【分類號(hào)】：P618.13
【正文快照】： Main factors controlling the sedimentation of high-quality shale inWufeng Longmaxi Fm,Upper Yangtze regionWang Yuman,Li Xinjing,Dong Dazhong,Zhang ChenchenWang Shufang(Petro China Petroleum ExplorationDevelopment Research Institute,Beijing 100083,Chin

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