新疆石油地质 ›› 2008, Vol. 29 ›› Issue (4): 485-487.

• 油气勘探 • 上一篇    下一篇

乌尔禾油田百口泉组层序地层及储集层演化(为庆祝新疆油田勘探开发研究院成立50周年而作)

刘文锋1a, 胡平樱1b, 吴宝成1a, 孟祥超2, 王海明1a, 宫清顺2   

  1. 1.中国石油新疆油田分公司a.勘探开发研究院; b.新港公司, 新疆克拉玛依834000;
    2.中国石油杭州地质研究院, 杭州310023
  • 收稿日期:2008-03-18 发布日期:2020-10-09
  • 作者简介:刘文锋(1975-), 男, 河南沈丘人, 工程师, 石油地质,(Tel)0990-6863375(E-mail)wangansheng@petrochina.com.cn.

Sequence Stratigr aphy and Reservoir Evolvement of Triassic Baikouquan Formation in Wuerhe Oilfield

LIU Wen-feng1a, HU Ping-ying1b, WU Bao-cheng1, MENG Xiang-chao2, WANG Hai-ming1, GONG Qing-shun2   

  1. 1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
    2. Hangzhou Research Institute of Petroleum Geology, PetroChina, Hangzhou, Zhejiang 310023, China
  • Received:2008-03-18 Published:2020-10-09

摘要: 将乌尔禾油田下三叠统百口泉组(T1b) 划分为1个长期基准面上升半旋回(LSC) 、3个中期旋回(MSC) 、7个短期旋回(SSC) 。划分的短期旋回与砂体发育期次相对应, 即每一个短期旋回对应一期砂体的形成。旋回发育规律: 自下而上为不对称旋回-对称旋回-不对称旋回, 前者的不对称旋回是由于前期基准面下降期沉积物被后期河道强烈冲刷而在地层记录中表现为冲刷界面; 后者的不对称旋回则是由于可容空间逐渐增大而使下降旋回表现为欠补偿的饥饿沉积所致。主要储集层段MSC1、MSC2中下部位于长期基准面上升旋回早-中期, 由退积叠加样式的短期旋回组成,沉积物以相互叠置的冲积扇扇中亚相砂砾岩沉积为主。MSC1旋回储集层的均质性和产能要明显好于MSC2旋回。

关键词: 乌尔禾油田, 百口泉组, 长期旋回, 中期旋回, 短期旋回

Abstract: The Baikouquan formation (T1b) of Triassic in Wuerhe oilfield can be divided into one long-stage semi-cycle (LSC), three midstage cycles (MSC) and seven short-stage cycles (SSC) which are in correspondence with the sandbody development period, that is, each period sandbody developed in each SSC correspondingly. The cycle evolvement is characterized by asymmetry-cycle, symmetry-cycle and asymmetry-cycle from bottom to top. The first asymmetry-cycle is resulted from that the sediments of previous stratum descending stage were washed down by post fluvial channels, followed by shaping scour surfaces; the last one is due to the increasing accommodations allowing descending cycles to be under-compensation sediments. The major reservoir units, MSC1and middle-bottom part of MSC2, are located in eary-middle period of LSC and composed of retrograding-upgrading SSC sediments with overlapped sand-gravel lithologies in middle-fan sub-facies of alluvial fan. The quality and productivity of MSC1reservoirs are obviously better than those of MSC2reservoirs.

Key words: Wuerhe oilfield, Baikouquan formation, LSC, MSC, SSC

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