石油与天然气地质 ›› 2012, Vol. 33 ›› Issue (1): 77-83.doi: 10.11743/ogg20120110

• 储层与层序 • 上一篇    下一篇

三角洲平原复合分流河道内部单砂体划分——以扶余油田中区南部泉头组四段为例

封从军1,2, 鲍志东1,2, 单启铜3, 孙萌思4, 于世岩5, 段宏臻6   

  1. 1. 中国石油大学 地球科学学院, 北京 102249;
    2. 中国石油大学 油气资源与探测国家重点实验室, 北京102249;
    3. 中国石油 东方地球物理公司 国际勘探事业部, 河北 涿州072751;
    4. 中国石油 东方地球物理公司 信息技术中心数据技术部, 北京 100007;
    5. 中国石油 吉林油田分公司 勘探开发研究院, 吉林 松原 138000;
    6. 中国石油 测井有限公司 青海事业部, 甘肃 敦煌 736202
  • 收稿日期:2011-05-12 修回日期:2011-11-16 出版日期:2012-02-28 发布日期:2012-03-22
  • 基金项目:

    国家科技重大专项(2008ZX05030-005-01)。

Single sand body identification in compound distributary channel of delta plain:a case study from the fourth member of Quantou Formation in the southern part of central Fuyu oilfield

Feng Congjun1,2, Bao Zhidong1,2, Shan Qitong3, Sun Mengsi4, Yu Shiyan5, Duan Hongzhen6   

  1. 1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
    2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
    3. International Exploration Department, CNPC Bureau of Geophysical Prospecting, Zhuozhou, Hebei 072751, China;
    4. Data Technology Department of Information Technology Center, CNPC Bureau of Geophysical Prospecting, Beijing 100007, Hebei 072751, China;
    5. Research Institute of Petroleum Exploration and Development, PetroChina Jilin Oilfield Company, Songyuan, Jilin 138000, China;
    6. Qinghai Business Division, CNPC Logging, Dunhuang, Gansu 736202, China
  • Received:2011-05-12 Revised:2011-11-16 Online:2012-02-28 Published:2012-03-22

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摘要：

以扶余油田中区南部泉头组四段为例,在沉积微相研究的基础上,综合应用岩心、测井、动态等资料,对三角洲平原复合分流河道内部的单砂体进行系统识别。研究结果表明,研究区泉头组四段发育大面积连片状、条带状的多成因复合分流河道砂体。在单砂体精细解剖的基础上,发现该区单砂体主要包括多层式、叠加式、多边式、单边式、对接式、孤立式六种叠置关系,识别出单砂体垂向分期、横向分界的8种测井相标志。采用研究区密井网小井距资料建立了单砂体宽厚比定量预测模式,以此为指导,在研究区泉头组四段5—10小层内共识别出44个低弯度曲流型单砂体。这些单砂体在平面上主要呈西南-东北方向条带状展布,宽度介于150~500 m,厚度介于2~8 m,宽/厚比介于40~100。最后,通过多组示踪剂分析测试资料,验证了单砂体划分的合理性。

关键词: 单砂体, 分流河道, 废弃河道, 三角洲平原, 泉头组, 扶余油田

Abstract:

Taking the fourth member of Quantou Formation(K1q4) in the southern part of central Fuyu oilfield as an example,we systematically identified single sand bodies in the compound distributary channels of delta plain based on study of sedimentary microfacies with integrating various data including cores,well logging and production performance.The results show that K1q4 has well-developed large interconnected and banded compound distributary channel sand bodies of various origins in the study area.Detail characterization of single sand bodies reveals that there are 6 main superposition patterns,including multi-layers,overlapping,multi-boundaries,single-boundary,juxtaposition and isolation.Moreover,8 types of logging-facies marks of single sand bodies are identified for vertical timing and lateral boundary identification.The dense well pattern and small well spacing data in the study area are used to establish a quantitative prediction model for the width-thickness ratio of single sand bodies.By using this model,totally 44 single sand bodies of low sinuous meandering type are recognized in the 5th to 10th layers of K1q4.These single sand bodies show a SW-NE trending banded distribution with a width of 150-500 meters,a thickness of 2-8 meters,and a width-thickness ratio of 40-100.Tracer test results prove the accuracy of single sand body identification.

Key words: single sand body, distributary channel, abandoned channel, delta plain, Quantou Formation, Fuyu oilfield

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