本文選題：古地理格局 + 顆粒灘��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：本文以巖石地層學(xué)、生物地層學(xué)、碳酸鹽巖巖石學(xué)、碳酸鹽巖沉積學(xué)和碳酸鹽巖儲(chǔ)層地質(zhì)學(xué)為指導(dǎo),基于四川盆地盆內(nèi)及其周緣171份鉆孔取心和露頭剖面資料,在前人相關(guān)研究的基礎(chǔ)上對(duì)早寒武世龍王廟期地層進(jìn)行巖相古地理相關(guān)研究。在區(qū)域地質(zhì)背景分析的基礎(chǔ)上,通過(guò)野外露頭、測(cè)錄井、巖心、薄片的綜合分析,結(jié)合區(qū)域背景和龍王廟組地層充填厚度分析認(rèn)為,四川盆地周緣北鄰摩天嶺微古陸和漢南古陸、西接康滇古陸,東南和東北分別為威信—黔江、石阡—秀山—龍山和鎮(zhèn)巴—巫溪—巴東水下古隆起環(huán)抱；盆內(nèi)呈近北東方向展布的川中古隆起和閬中—通江拗陷、江津—奉節(jié)拗陷構(gòu)成“一隆兩拗”,南部瀘州—筠連—昭通繼承性拗陷依然存在；盆地及周緣向東北隅和東南隅分別接入秦嶺洋和江南盆地。根據(jù)巖石類型、沉積構(gòu)造、沉積旋回、古生物類型、測(cè)井響應(yīng)特征進(jìn)行單井沉積相劃分、連井沉積相對(duì)比,結(jié)果表明,受古地理背景影響,龍王廟期發(fā)育連陸碳酸鹽巖臺(tái)地—斜坡—盆地沉積體系,連陸碳酸鹽巖臺(tái)地構(gòu)成沉積主體,可識(shí)別出混積潮坪、局限～蒸發(fā)臺(tái)地、半局限～局限臺(tái)地和臺(tái)地邊緣沉積相類型。在此基礎(chǔ)上,結(jié)合碎屑巖含量與陸源方向、石灰?guī)r、白云巖和膏鹽巖含量與海域局限性和臺(tái)地邊緣相對(duì)位置、顆粒巖含量等單因素定量分析,恢復(fù)龍王廟期巖相古地理展布樣式并建立沉積模式。結(jié)果表明盆內(nèi)以發(fā)育局限～蒸發(fā)環(huán)境的云巖類和膏鹽巖類沉積,盆地外圍逐步向石灰?guī)r沉積過(guò)渡為主,間夾白云巖沉積,水體具有逐漸開(kāi)闊、鹽度逐漸正常的趨勢(shì),綿陽(yáng)—鎮(zhèn)巴北所處的潮坪向海側(cè)、樂(lè)山—開(kāi)江所在的川中古隆起,威信—黔江、石阡—秀山—龍山和鎮(zhèn)巴—巫溪—巴東水下古隆起、瀘州—筠連—昭通拗陷周緣為臺(tái)內(nèi)顆粒灘有利發(fā)育區(qū),東南緣石阡—思南—龍山—桑植和東北緣鎮(zhèn)巴—興山一帶為顆粒灘潛在區(qū)域。中上揚(yáng)子地區(qū)具有典型臺(tái)地—陸表海沉積相模式,發(fā)育連陸碳酸鹽巖臺(tái)地—斜坡—盆地沉積體系,川中地區(qū)為局限～蒸發(fā)瀉湖夾顆粒灘的局限～蒸發(fā)臺(tái)地相,向東和南部過(guò)渡為半局限～局限瀉湖夾顆粒灘相為主的半局限～局限臺(tái)地相,東南部和東北部進(jìn)入高能臺(tái)緣帶,向兩個(gè)方向進(jìn)一步發(fā)育半深海斜坡和深海盆地相。顆粒灘相儲(chǔ)集性能優(yōu)越,顆粒巖在大區(qū)內(nèi)保持西淺東深、隆坳相間的古地理格局下,在古地貌高地具有廣覆式“五線一帶”的平面分布樣式。受古隆起寬緩古海底底形控制,次一級(jí)海平面升降影響其橫向連續(xù)性。
[Abstract]:Guided by lithostratigraphy, biostratigraphy, carbonate petrology, carbonate sedimentology and carbonate reservoir geology, this paper is based on 171 drilling coring and outcrop profiles in and around the basin of Sichuan Basin. Based on previous studies, the lithofacies and paleogeography of early Cambrian Longwangmiao strata were studied. Based on the analysis of regional geological background, through the comprehensive analysis of field outcrop, logging, core and slice, combined with the analysis of regional background and the formation filling thickness of Longwangmiao formation, it is concluded that, The margin of Sichuan Basin is bounded by the Tianjiling and Hannan ancient land to the north, KangDian to the west, Weixin to Qianjiang in the southeast and Qianjiang to the northeast, Shipathian-Xiushan-Longshan and Zhenba to Wuxi to the underwater paleouplift. In the basin, the central Sichuan uplift and Langzhong-Tongjiang depression are distributed in the north east direction, the Jiang Jin Fengjie depression constitutes "one uplift and two depressions", and the southern Luzhou-Junlian Zhaotong inherited depression still exists. The basin and its periphery are connected to the Qinling Ocean and the Jiangnan basin to the northeast and southeast, respectively. According to the rock types, sedimentary structures, sedimentary cycles, paleontological types and log response characteristics, single well sedimentary facies are divided, and the sedimentary facies of multiple wells are compared. The results show that they are influenced by paleogeographic background. In Longwangmiao period, the carbonate platform, slope and basin sedimentary system were developed, and the carbonate platform formed the main sedimentary body. The sedimentary facies types of mixed tidal flat, limited to evaporation platform, semi-limited to restricted platform and platform margin could be identified. On this basis, combined with the single factor quantitative analysis, such as clastic rock content and continental source direction, limestone, dolomite and gypsum salt content and the limitation of sea area and the relative position of platform edge, granulite content, etc. The distribution pattern of lithofacies and paleogeography in Longwangmiao period was restored and sedimentary model was established. The results show that the basin consists of dolomite and gypsum salt deposits with limited ~ evaporative environment, and the transition from the periphery of the basin to the limestone deposit is the main one, and the intercalated dolomite deposits, the water body is gradually open and the salinity is gradually normal. Mianyang-Zhenba north of the tidal flat to the sea side, Leshan-Kaijiang where the middle-ancient uplift of Sichuan, Weixin-Qianjiang, Shiqian-Xiushan-Longshan and Zhenba-Wuxi-Padong underwater ancient uplift, The margin of Luzhou-Junlian-Zhaotong depression is favorable for the development of grain beach in the platform, the area of Shipathian-Sinan-Longshan-Sangzhi in southeastern margin and the area of Zhenba to Xingshan in northeast margin are potential areas of grain beach. In the middle and upper Yangtze area, there is a typical platform-surface sea sedimentary facies model, and the carbonate rock platform-slope-basin sedimentary system is developed, and the central Sichuan area is a limited-evaporative lagoon grained beach limited to evaporative platform facies. The transition to the east and south is mainly semi-confined ~ confined lagoon grained beach facies. In the southeast and the northeast, the high-energy platform margin zone is entered, and the semi-deep sea slope and deep-sea basin facies are further developed in both directions. The granular-beach facies reservoir is superior, the granulite rock keeps the west shallow and the east deep in the big area, under the paleogeographic pattern of the interphase of the long depression, it has the plane distribution style of "five lines" in the paleogeomorphic highland. The horizontal continuity is affected by the subprimary sea level rise and fall controlled by the broad and gentle paleo-seabed bottom shape of the ancient uplift.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13;P531

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王東方;中國(guó)東部中亞構(gòu)造帶及向環(huán)太平洋構(gòu)造帶的轉(zhuǎn)化[J];華北地質(zhì)礦產(chǎn)雜志;1995年02期

2 涂懷奎;摩天嶺古陸地殼演化與金礦床的分帶[J];黃金地質(zhì);1998年02期

3 余家仁;雷懷玉;劉趁花;;試論海相碳酸鹽巖儲(chǔ)層發(fā)育的影響因素——以任丘油田霧迷山組為例[J];海相油氣地質(zhì);1998年01期

4 牛新生;馮常茂;劉進(jìn);;黔中隆起的形成時(shí)間及形成機(jī)制探討[J];海相油氣地質(zhì);2007年02期

5 梁狄剛;郭彤樓;陳建平;邊立曾;趙U，

本文編號(hào)：1855380