本文選題：東河砂巖段 + 準(zhǔn)層序組�。� 參考：《石油學(xué)報(bào)》2017年02期

【摘要】：東河砂巖段是塔里木盆地最重要的海相碎屑巖油氣勘探層位,廣泛分布于全盆地。為進(jìn)一步解決東河砂巖段內(nèi)部砂體對(duì)比與分布問題,將東河砂巖段進(jìn)行了層序格架內(nèi)的細(xì)分層和沉積相分布研究。利用全盆地110余口井和重點(diǎn)區(qū)域地震大剖面,將塔里木盆地晚泥盆世—早石炭世的東河塘組—巴楚組劃分為一個(gè)層序,東河砂巖段—生屑灰?guī)r段細(xì)分為4個(gè)具有區(qū)域?qū)Ρ纫饬x的準(zhǔn)層序組,恢復(fù)了以準(zhǔn)層序組為單元的巖相古地理與砂體分布。準(zhǔn)層序組I和Ⅱ?yàn)榈臀惑w系域,準(zhǔn)層序組III和IV為海侵體系域。準(zhǔn)層序組I早期低位體系域沉積局限于塔西南地區(qū)西部,以臨濱至前濱亞相為主。準(zhǔn)層序組Ⅱ晚期低位體系域沉積分布于塔里木盆地的中西部地區(qū),以寬闊的前濱、臨濱亞相為主;塔北—塔中—巴楚地區(qū)東南部為寬闊的濱岸前濱—臨濱亞相,盆地中部為臨濱—過渡帶亞相;盆地西南部為濱外淺海亞相泥巖。準(zhǔn)層序組III早期海侵體系域沉積范圍擴(kuò)大,塔北—巴楚地區(qū)以濱岸相前濱—臨濱亞相為主,塔中地區(qū)以濱岸相砂壩為主,盆地內(nèi)部廣大地區(qū)以濱外淺海亞相泥巖為主。準(zhǔn)層序組Ⅳ晚期海侵體系域沉積范圍達(dá)最大,盆地中部以廣闊的碳酸鹽臺(tái)地相為主,塔西南地區(qū)為局限、半局限臺(tái)地相,塔北地區(qū)以混積淺海相為主,在躍南—羊屋—輪古井區(qū)發(fā)育濱岸相沿岸砂壩。全盆地東河砂巖段的砂體分布主要受控于海平面抬升、古隆起或古地貌、物源等,提出的準(zhǔn)層序組格架內(nèi)的砂體分布模式指導(dǎo)并得到了生產(chǎn)鉆井的證實(shí)。
[Abstract]:Donghe sandstone formation is the most important oil and gas exploration horizon of marine clastic rocks in Tarim Basin and is widely distributed throughout the basin. In order to further solve the problem of sandbody correlation and distribution in the Donghe sandstone section, the subdivision and sedimentary facies distribution in the sequence framework of the Donghe sandstone member are studied. The Donghetang formation and Bachu formation of the late Devonian and early Carboniferous in the Tarim Basin are divided into a sequence by using more than 110 wells and large seismic profiles in the key regions of the basin. The Donghe sandstone-bioclastic limestone member is subdivided into four regional correlation sequences, and the lithofacies paleogeography and sandbody distribution with the quasi-sequence formation as the unit is restored. The quasequence groups I and II are low system tracts, and the quasi-sequence groups III and IV are transgressive system tracts. The deposition of early low system tracts in the early stage of sequence formation I is confined to the western part of southwest Tata, and the main facies is from the shore to the foreshore. The deposition of the lower system tract in late stage 鈪，

本文編號(hào)：2070689