本文關鍵詞： 四川盆地 震旦紀 德陽—安岳臺內(nèi)裂陷 巖相古地理 沉積模式 臺緣帶 裂陷邊緣臺緣帶　出處：《天然氣工業(yè)》2017年01期 　論文類型：期刊論文

【摘要】：為指導四川盆地安岳古老碳酸鹽巖特大型氣田有利儲集相帶的展布預測,從構(gòu)造和巖相古地理分析入手,結(jié)合野外露頭剖面、鉆井和地震資料,重建了該盆地震旦系燈影組巖相古地理及其沉積模式,取得了4項研究成果:①盆地及其周緣震旦紀處于伸展構(gòu)造環(huán)境,強烈的伸展作用導致德陽—安岳臺內(nèi)裂陷的形成,其最終將四川盆地分隔成"兩隆四凹"的古地理格局,"兩隆"演化為臺地,"四凹"演化成斜坡—盆地環(huán)境;②燈二期發(fā)育大陸邊緣丘灘、裂陷邊緣丘灘及臺內(nèi)丘灘等有利儲集相帶,裂陷邊緣丘灘沿德陽—安岳裂陷兩側(cè)發(fā)育,呈U形分布,寬5~40 km、長約500 km,向西在什邡一帶、向北在廣元附近與大陸邊緣臺緣帶相接;③燈四期繼承了燈二期的巖相古地理特點,但由于德陽—安岳裂陷不斷向南張裂,并最終貫穿盆地南北,裂陷邊緣臺緣帶演化成東西2條,東部臺緣帶分布在廣元—鹽亭—安岳—瀘州一帶,南北向展布,長約450 km、寬4~50 km,西部臺緣發(fā)育在都江堰—成都—威遠—宜賓—馬邊一帶,呈向東凸出的弧狀分布,長約300 km、寬4~30 km;④建立了燈影組"雙臺緣"鑲邊臺地沉積模式,指導了有利儲集相帶的展布預測。
[Abstract]:In order to guide the distribution and prediction of favorable reservoir facies in Anyue ancient carbonate gas field in Sichuan Basin, starting with structural and lithofacies paleogeography analysis, combined with outcrop profile, drilling and seismic data, The lithofacies paleogeography and sedimentary model of the Dengying formation of the Sinian system in this basin have been reconstructed, and four research results have been obtained. The basin and its surrounding Sinian are in an extensional tectonic environment. The strong extensional process resulted in the formation of the Deyang-Anyue platform rift depression. In the end, the Sichuan basin is divided into a paleogeographic pattern of "two uplift and four concave", "two uplift" evolves into a platform, and "four concave" evolves into a slope-basin environment, the second stage of which develops the continental margin hilly beach. There are favorable reservoir facies zones such as margin shoal and terrace hilly beach, which develop along both sides of Deyang-Anyue rift, with U-shaped distribution, 540 km wide and about 500 km long. They are located in Shifang area to the west. The northward connection with the margin zone of the continental margin near Guangyuan inherits the lithofacies paleogeographic features of the second phase of the lantern, but because the Deyang-Anyue rift depression is constantly spreading southward, it eventually runs through the north and the south of the basin. The platform margin of the rifting margin evolved into east-west two, and the eastern margin was distributed in the area of Guangyuan-Yanting-Anyue Luzhou, spreading from north to south, about 450 km in length and 450 km in width. The western margin developed in Dujiangyan, Chengdu, Weiyuan, Yibin and Mambian areas. The sedimentary model of the "double platform margin" edge platform of the Dengying formation is established, which indicates the distribution and prediction of favorable reservoir facies belt.
【作者單位】： 中國石油杭州地質(zhì)研究院;中國石油天然氣集團公司碳酸鹽巖儲層重點實驗室;
【基金】：國家科技重大專項(編號:2016ZX05004-002) 中國石油天然氣集團公司科技重大專項(編號:2014E-32)
【分類號】：P618.13;P534.31

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