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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

渤海湾盆地歧北次凹超压背景下异常高孔带成因分析与有利储层预测

肖丽华,张阳，吴晨亮，杜虹宝，孟元林，高煜婷，王志国   

  1. 1.东北石油大学地球科学学院，黑龙江 大庆 163318；
    2.C and C Reservoirs Inc.,Houston TX77036；
    3.庆新油田开发有限责任公司,黑龙江 安达 151413；
    4.中国石油大庆油田有限责任公司勘探开发研究院，黑龙江 大庆 163712
  • 收稿日期:2014-01-16 修回日期:2014-03-27 出版日期:2014-08-10 发布日期:2014-08-10
  • 作者简介:肖丽华(1960-)，女，辽宁抚顺人，教授，主要从事石油地质学与储层的研究和教学工作.E-mail:qhdxlh@163.com.
  • 基金资助:

    国家自然科学基金项目(编号:U1262106)资助.

Analysis of the Causes of Anomalously High Porosity Zones and Prediction of the Favorable Reservoirs under Overpressure in Qibei Sub-sag,Bohai Bay Basin

XIAO Li-hua，ZHANG Yang，WU Chen-liang，DU Hong-bao，MENG Yuan-lin，GAO Yu-ting，WANG Zhi-guo   

  1. 1.Northeast Petroleum University,Daqing 163318,China;2.C and C Reservoirs Inc.,Houston 77036,USA;
    3.Qingxin Oilfield Development Company Ltd.,Anda 151413,China;
    4.The Exploration & Development Institute of Daqing Oilfield Limited Company,Daqing 163712,China  
  • Received:2014-01-16 Revised:2014-03-27 Online:2014-08-10 Published:2014-08-10

PDF (PC)

630

摘要：

为了预测渤海湾盆地歧北次凹深层高温、高压背景下，低孔、低渗致密砂岩中有利储层的分布，首先应用储层实测数据研究了储层异常高孔带在纵向上的分布及其成因，然后应用成岩作用数值模拟技术，预测了Es下1储层的成岩阶段，结合前人沉积相和超压的研究成果，预测了有利储层的分布。结果表明，歧北凹陷在2300~2 740m、3 000~3 400m、3 600~4 200m及4 400~4 950m的深度范围内，发育4个异常高孔带，其成因为大气水淋滤、有机酸溶蚀以及超压对成岩作用的抑制；处于早成岩阶段B期—中成岩阶段A1亚期且有砂体发育的区域，或目前处于中成岩阶段A2亚期但有超压发育，超压可使地史时期形成的次生孔隙保存下来的砂体发育区,是储层发育的有利地区，这些地区位于港东断裂的东部和马棚口地区。

 

关键词: 异常高孔带, 致密砂岩, 超压, 孔隙演化动平衡, 歧北次凹

Abstract:

In order to predict the distribution of favorable reservoirs in the tight sandstones with low porosity and low permeability under high temperature and high pressure in Qibei Sub-sag,Bohai Bay Basin,core porosity analysis data were used to show the vertical distribution of anomalously high porosity zones and the causes of them,and numerical diagenetic modeling and sedimentary facies analysis were used to predict the diagenetic stages of EsL1 and favorable reservoir zones.The results show,four zones with anomalously high porosity were discovered in the depth ranges of 2 300-2 740m,3 000-3 400m,3 600-4 200m,and 4 400-4 950m.They are caused by meteoric water leaching,organic acid resolving,and overpressure's retardation to diagenesis.Both the area developing sandstones in early diagenetic stage B-middle diagenetic stage A1 and the area developing sandstones in middle diagenetic stage A2 but under the environment of overpressure which could preserve the secondary pores formed in geohistory are the favorable area of reservoirs,where high-quality reservoirs are developed,including the Mapengkou area and the Area to the east of Gangdong fault.

 

Key words: Anomalously high porosity zone, Tight sandstone, Overpressure, Porosity evolution dynamic balance, Qibei Sub-sag

中图分类号: 

  • TE122.1+2

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