發(fā)布時(shí)間：2018-03-08 15:45

  本文選題：開闊臺地相　切入點(diǎn)：濱外陸棚相　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：論文以層序地層學(xué)、沉積學(xué)等相關(guān)理論為指導(dǎo),充分利用研究區(qū)內(nèi)地震、鉆井、測井、錄井、巖心、巖屑等基礎(chǔ)資料,應(yīng)用宏觀和微觀研究相結(jié)合的手段,建立了塔里木盆地東河砂巖沉積期層序地層格架,并對該時(shí)期沉積相類型及特征、沉積相分布及沉積模式進(jìn)行了綜合分析描述。依據(jù)盆地各典型單井巖電特征及露頭特征,結(jié)合東河砂巖沉積期相對海平面變化,認(rèn)為沉積期發(fā)育一個(gè)三級層序,包括海侵、高位體系域及8個(gè)四級層序,其中四級層序1、2、3、4、5、6屬于三級層序的海侵體系域,四級層序7、8屬于三級層序的高位體系域。東河砂巖沉積期形成的巴楚組地層的巖石類型比較豐富,包括碳酸鹽巖類和碎屑巖類,巴楚組包括東河砂巖段、下泥巖段及生屑灰?guī)r段,其中碳酸鹽巖類主要發(fā)育于東河砂巖沉積期的生屑灰?guī)r段,碎屑巖類主要發(fā)育于東河砂巖沉積期的東河砂巖段和下泥巖段;東河砂巖段巖石類型主要為成熟度高的砂巖,下泥巖段巖石類型主要為低能的暗色泥巖,亦出現(xiàn)少量泥晶灰?guī)r;生屑灰?guī)r段巖石類型主要為生屑灰?guī)r、泥晶灰?guī)r等。在盆地東河砂巖沉積期發(fā)育開闊臺地相、半局限臺地相、濱外陸棚相、濱岸相、河口灣相以及辮狀河三角洲相等6個(gè)沉積相和臺內(nèi)灘、灘間海、瀉湖、半局限臺地海、臨濱、前濱、后濱、辮狀河三角洲平原等多個(gè)沉積亞相。其中濱岸相、河口灣相、辮狀河三角洲相主要分布于東河砂巖沉積期地層中下部,濱外陸棚相主要分布于中部,半局限臺地相、開闊臺地相主要分布于頂部。在東河砂巖沉積期,海水不斷向東入侵,自西向東,海侵體系域內(nèi)各四級層序的濱外陸棚-濱岸沉積體系不斷向東遷移,東河砂巖沉積位置隨之東移;高位體系域內(nèi)四級層序形成開闊臺地-半局限臺地-濱岸相沉積體系,且臺地相沉積范圍寬廣而濱岸相僅在研究區(qū)東北部沿古陸呈狹窄帶狀分布。
[Abstract]:Based on sequence stratigraphy, sedimentology and other related theories, make full use of the study area of seismic, drilling, logging, logging, core, debris and other basic data, application of macroscopic and microcosmic research method, established the Donghe sandstone sedimentary period in Tarim Basin, sequence stratigraphy, and the sedimentary facies types and characteristics of period that makes a comprehensive analysis of the distribution of sedimentary facies and sedimentary model description. According to the typical electrical characteristics of single well basin and outcrop characteristics, combined with the Donghe sandstone sedimentary period of relative sea-level change, considered a three grade sequence, depositional period including transgressive, highstand system tract and 8 four level sequence, including four transgressive system tract sequence 1,2,3,4,5,6 is three order sequence, HST four sequence 7,8 belongs to the three grade sequence. The Bachu formation formed during the deposition of the Donghe sandstone rock types are abundant, including carbonate 綾誨拰紕庡睉宀╃被,宸存緇勫寘鎷笢娌崇爞宀╂,涓嬫償宀╂鍙?qiáng)鐢熷睉鐏板博娈?鍏朵腑紕抽吀鐩愬博綾諱富瑕佸彂鑲蹭簬涓滄渤鐮傚博娌夌Н鏈熺殑鐢熷睉鐏板博孌，

本文編號：1584519