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现代地质 ›› 2011, Vol. 25 ›› Issue (4): 626-634.

• 能源地质学 • 上一篇    下一篇

东营凹陷西部古近系沙三段沉积特征的再认识及其石油地质意义

王红亮1,2 ，周廷全3，宋建勇3，苗小龙1,2   

  1. 1中国地质大学  能源学院，北京100083；2中国地质大学 海相储层演化与油气富集机理教育部重点实验室，北京100083；
    3中国石化 胜利油田有限公司，山东 东营257015
  • 收稿日期:2011-02-10 修回日期:2011-03-12 出版日期:2011-08-29 发布日期:2011-08-31
  • 作者简介:王红亮，男，副教授，1970年出生，矿产普查与勘探专业，主要从事沉积储层及层序地层等方面的教学及科研工作。Email: whliang@cugb.edu.cn。
  • 基金资助:

    国家自然科学基金项目（40672078）。

Recognition of Sedimentary Characteristics and Its Significance to Petroleum

WANG Hongliang1,2, ZHOU Tingquan3, SONG Jianyong3, MIAO Xiaolong1,2
   

  1. 1School of Energy Resources, China University of Geosciences, Beijing100083, China；2Key Laboratory of Marine Reservoir
    Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Geosciences, Beijing100083,China；
     3Shengli Oilfield Company Ltd, SINOPEC, Dongying, Shandong257015, China
  • Received:2011-02-10 Revised:2011-03-12 Online:2011-08-29 Published:2011-08-31

PDF (PC)

2860

被引次数

10

摘要：

东营凹陷西部沙三段进一步勘探重点为岩性圈闭，但对其沉积特征的认识还存在争议。在前人沉积特征研究基础上，从沉积相类型、物源体系、沉积相分布及沉积模式等方面重新认识该区的沉积特征。新认识包括以下几个方面：研究区发育有辫状三角洲、近岸水下扇、浊积扇、滑塌浊积岩、湖泊等几种主要沉积相类型；发育有南部金家、西部高青凸起和东南部等3大物源体系，其中南部金家物源体系对研究区影响最大，形成较大规模的辫状三角洲（金家砂体和高青砂体）及其前端浊积扇体（樊家砂体）；高青凸起物源在高青断层下降盘形成近岸水下扇，影响范围并不大；东南部物源体系的影响主要是在沙三段沉积后期，形成来自东南部的辫状三角洲（正理庄砂体），与南部物源体系交汇。在沉积相分布认识基础上，建立了研究区辫状三角洲—浊积扇的沉积模式，其与墨西哥湾新生界发育的海相三角洲模式具有很大相似性。在此基础上，指出研究区岩性圈闭勘探的主要目标是三角洲前端的浊积扇。

关键词: 东营凹陷, 沙三段, 物源体系, 沉积相, 岩性圈闭

Abstract:

Lithologic traps are the main play for the further exploration in western Dongying Depression. But the knowledge about sedimentary characteristics in this area is disputed. Based on the former views, sedimentary characteristics are reidentified through facies types, provenance systems, facies distribution and facies model. The new understandings are as follows. The main facies types are  braided delta, nearshore sublacustrine fan, turbidite fan and lake. There are three provenance systems which are southern Jinjia, western Gaoqing and southeast provenance systems. The southern Jinjia provenance system is the main one, which formed largescale braided delta （Jinjia sandbody and Gaoqing sandbody） and turbidite fans located at toe of the delta. The western Gaoqing provenance system formed nearshore sublacustrine fan along fault throw wall, which is located in limited area. The southeast provenance system entered into the study area in the late of Sha 3 period, which converge with the southern provenance system. Sedimentary facies model of braided delta to turbidite is constructed in light of sedimentary characteristics which is similar to the delta model in the Gulf of Mexico. Based on this, we draw a conclusion that turbidite fans are the main play for lithologic traps in this area.

Key words: Dongying Depression, the 3rd Member of Shahejie Formation, provenance system, sedimentary facies, lithologic trap

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