石油学报 ›› 2017, Vol. 38 ›› Issue (2): 135-149.DOI: 10.7623/syxb201702002

• 地质勘探 • 上一篇    下一篇

塔里木盆地东河砂岩段准层序组特征及岩相古地理与砂体分布

贾进华1, 申银民2   

  1. 1. 中国石油勘探开发研究院 北京 100083;
    2. 中国石油塔里木油田公司勘探开发研究院 新疆库尔勒 841000
  • 收稿日期:2016-05-17 修回日期:2016-11-11 出版日期:2017-02-25 发布日期:2017-03-08
  • 通讯作者: 贾进华,男,1965年10月生,1987年获中国地质大学(武汉)学士学位,1993年获中国地质大学(北京)博士学位,现为中国石油勘探开发研究院高级工程师,主要从事沉积学、储层地质学和石油地质学研究工作。Email:jjh@petrochina.com.cn
  • 作者简介:贾进华,男,1965年10月生,1987年获中国地质大学(武汉)学士学位,1993年获中国地质大学(北京)博士学位,现为中国石油勘探开发研究院高级工程师,主要从事沉积学、储层地质学和石油地质学研究工作。Email:jjh@petrochina.com.cn
  • 基金资助:

    国家重大科技专项(2011ZX05001)资助。

Parasequence set division, lithofacies paleogeography and sandbody distribution of Donghe sandstone Member in Tarim Basin

Jia Jinhua1, Shen Yinmin2   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China
  • Received:2016-05-17 Revised:2016-11-11 Online:2017-02-25 Published:2017-03-08

摘要:

东河砂岩段是塔里木盆地最重要的海相碎屑岩油气勘探层位,广泛分布于全盆地。为进一步解决东河砂岩段内部砂体对比与分布问题,将东河砂岩段进行了层序格架内的细分层和沉积相分布研究。利用全盆地110余口井和重点区域地震大剖面,将塔里木盆地晚泥盆世-早石炭世的东河塘组-巴楚组划分为一个层序,东河砂岩段-生屑灰岩段细分为4个具有区域对比意义的准层序组,恢复了以准层序组为单元的岩相古地理与砂体分布。准层序组I和Ⅱ为低位体系域,准层序组III和IV为海侵体系域。准层序组I早期低位体系域沉积局限于塔西南地区西部,以临滨至前滨亚相为主。准层序组Ⅱ晚期低位体系域沉积分布于塔里木盆地的中西部地区,以宽阔的前滨、临滨亚相为主;塔北-塔中-巴楚地区东南部为宽阔的滨岸前滨-临滨亚相,盆地中部为临滨-过渡带亚相;盆地西南部为滨外浅海亚相泥岩。准层序组III早期海侵体系域沉积范围扩大,塔北-巴楚地区以滨岸相前滨-临滨亚相为主,塔中地区以滨岸相砂坝为主,盆地内部广大地区以滨外浅海亚相泥岩为主。准层序组Ⅳ晚期海侵体系域沉积范围达最大,盆地中部以广阔的碳酸盐台地相为主,塔西南地区为局限、半局限台地相,塔北地区以混积浅海相为主,在跃南-羊屋-轮古井区发育滨岸相沿岸砂坝。全盆地东河砂岩段的砂体分布主要受控于海平面抬升、古隆起或古地貌、物源等,提出的准层序组格架内的砂体分布模式指导并得到了生产钻井的证实。

关键词: 东河砂岩段, 准层序组, 岩相古地理, 砂体分布, 塔里木盆地

Abstract:

Donghe sandstone is the most important hydrocarbon exploration horizon of marine clastics in Tarim Basin, which is widely distributed in the whole basin. To further solve sandbody correlation and sedimentary facies distribution in Donghe sandstone, this stratum was studied and explored as a set of sandbody. Using more than 110 wells in the whole basin and the seismic section of key regions, the Late Devonian-Early Carboniferous Donghetang Formation-Bachu Formation in Tarim Basin were divided as a sequence, and Donghe sandstone Member-bioclastic limestone Member was subdivided into I-IV parasequence sets with regional correlations, reconstructing lithofacies paleogeography and sandbody distribution with a parasequence set as the unit. Parasequence sets I-II are low stand system tract, and parasequence sets III-IV are transgressive system tract. The early low stand system tract of parasequence set I was restricted to the west part of southwestern Tarim Basin, dominated by shoreface-foreshore subfacies. The late low stand system tract of parasequence set II was located in the central and western of Tarim Basin, dominated by wide foreshore and shoreface subfacies; littoral foreshore-shore face subfacies are widely developed in the north Tarim-central Tarim-Bachu area, and the central Tarim Basin mainly shows shoreface-transitional zone subfacies; the southwestern Tarim Basin is dominated by offshore shallow sea mudstones. The deposition range of early transgressive system tract in parasequence set III expanded. North Tarim-Bachu area is dominated by littoral foreshore-shoreface subfacies, and littoral-facies sandbar is developed in the central Tarim Basin; the vast areas in the basin are dominated by offshore shallow sea subfacies mudstone. The deposition range of late transgressive system tract in parasequence set IV reached the maximum. The central Tarim Basin is dominated by wide carbonate platform facies, and restricted-semi-restricted platform facies are mainly developed in the southwestern Tarim. The northern Tarim is dominated by mixed shallow sea facies, and littoral coastal sandbars are developed in the Yuenan-Yangwu-Lungu well area. Sandbody distribution in Donghe sandstone in the whole basin is mainly controlled by sea level rise, paleohigh or ancient landform, provenance, etc., and the proposed model of sandbody distribution in the parasequence set framework provides guidance for and is also verified by production drilling.

Key words: Donghe sandstone Member, parasequence set, lithofacies paleogeography, sandbody distribution, Tarim Basin

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