石油与天然气地质 ›› 2014, Vol. 35 ›› Issue (1): 86-97.doi: 10.11743/ogg20140111

• 盆地构造 • 上一篇    下一篇

南堡凹陷中浅层盖-断组合控油模式及有利含油层位预测

吕延防1, 许辰璐1, 付广1, 刘乃瑜2, 崔守凯3, 庞磊4   

  1. 1. 东北石油大学 地球科学学院, 黑龙江 大庆 163318;
    2. 中国石油 新疆油田分公司 百口泉采油厂, 新疆 克拉玛依 834000;
    3. 中国石油 青海油田分公司 采油二厂, 青海 茫崖 816499;
    4. 中国石油 大庆油田分公司 第二采油厂, 黑龙江 大庆 163414
  • 收稿日期:2013-09-17 修回日期:2013-10-21 出版日期:2014-02-08 发布日期:2014-03-26
  • 第一作者简介:吕延防（1957—），男，教授、博士生导师，油气成藏和油气资源评价。E-mail：571128lyf@nepu.edu.cn。
  • 基金项目:
    国家大型油气田及煤层气开发科技重大专项（2011ZX05007-002）；中国石油科技创新基金项目（2012D-5006-0110）。

Oil-controlling models of caprock-fault combination and prediction of favorable horizons for hydrocarbon accumulation in middle-shallow sequences of Nanpu sag

Lü Yanfang1, Xu Chenlu1, Fu Guang1, Liu Naiyu2, Cui Shoukai3, Pang Lei4   

  1. 1. College of Earth Sciences, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    2. Baikouquan Oil Production Plant, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
    3. No.2 Oil Production Plant, PetroChina Qinghai Oilfield Company, Mangya, Qinghai 816499, China;
    4. No.2 Oil Production Plant, PetroChina Daqing Oilfield Company, Daqing, Heilongjiang 163414, China
  • Received:2013-09-17 Revised:2013-10-21 Online:2014-02-08 Published:2014-03-26
  • Contact: 许辰璐（1988—），男，硕士研究生，矿物学、岩石学、矿床学。E-mail：shmiltw@163.com。 E-mail:shmiltw@163.com

PDF (PC)

698

被引次数

27

摘要： 对南堡凹陷中浅层油气的垂向分布起控制作用的盖层有3套，分别是明化镇组下段泥岩、馆陶组三段火山岩和东营组二段泥岩。由于受到断层的切割，盖层封闭油气的能力受到了不同程度的破坏。通过对各盖层封闭油气的断接厚度临界值进行研究，结合断层垂向断穿层位、平面分布以及活动历史等特点，配合油气纵向和平面分布规律的分析，发现上述3套盖层与断层组合的空间匹配控油模式有3种：①下全封模式，油气有利于在东营组二段盖层之下聚集成藏；②下开中封模式，油气有利于在馆陶组三段盖层之下聚集成藏；③中下有限封盖模式，从下至明化镇组底部皆可能有油气聚集成藏。利用所提出的3种封盖模式，在研究了南堡1-5区块盖层与断层等特征的基础上，对该区的油气有利聚集层位进行了预测，指出f1-3断裂和f2-12断裂控制区域属于下开中封模式，有利油气聚集层位为馆陶组四段、东营组一段及二段以下的各套地层；f4-48断裂控制区域属于下全封模式，有利油气聚集层位在东营组二段盖层之下；f13-1断裂控制区域属于中下有限封盖模式，明化镇组下段盖层之下的所有储层均可能有油气的聚集。提出的模式有效地指导了研究区有利含油层位预测。

关键词: 盖层断接厚度, 控油模式, 油源断裂, 盖层, 南堡凹陷

Abstract: There are 3 caprocks that control the vertical distribution of oil and gas in the middle-shallow sequences of Nanpu sag,namely the mudstone caprock of the Lower Minghuazhen Formation(Nm),the volcanic caprock of the third member of Guantao Formation(Ng3)and the mudstone caprock of the second member of Dongying Formation(Ed2).The sealing abilities of the caprocks were destroyed in different degrees due to faulting.Based on analysis of the thresholds of juxtaposition thickness of faults in these caprocks and in combination the vertical positions of fault cutting cross the caprocks,areal fault distribution and faulting history,we built 3 oil-controlling models of caprock-fault combinations.①Full sealing at the bottom.This model is favorable for oil accumulation under the mudstone caprock of the 2nd members of Dongying Formation;②Open at the bottom but sealing in the middle.This model is favorable for oil accumulation under the volcanic caprock of Ng3;③Limited sealing at the bottom and middle.This model is favorable for oil accumulation all the reservoirs under the mudstone caprock of Ed2 in Nanpu sag.According to these 3 models and the characteristics of caprock and faults in Nanpu 1-5 block,we predicted the horizons favorable for oil accumulation in the study area.Area under the control of fault f1-3 and f2-12 is the second model,and favorable horizons for oil accumulation are the 4th member of Guantao Formation,the 1st member and the reservoirs below the 2nd member of Dongying Formation.Area under control of fault f4-48 is the first model,and the favorable horizons for oil accumulation are reservoirs below the caprock of the second member of Dongying Formation.Area under control of fault f13-1 is the third model,and all reservoirs under the caprock of the Lower Minghuazhen Formation are favorable for oil accumulation.These models have effectively guided the prediction of potential exploration targets.

Key words: juxtaposition thickness of faulted caprock, oil-controlling model, source rock-rooted fault, caprock, Nanpu sag

中图分类号: