石油学报 ›› 2013, Vol. 34 ›› Issue (4): 683-691.DOI: 10.7623/syxb201304008

• 地质勘探 • 上一篇    下一篇

东营凹陷北带古近系中深层异常高孔带类型及特征

操应长, 远光辉, 李晓艳, 杨田, 王艳忠   

  1. 中国石油大学地球科学与技术学院 山东 青岛 266580
  • 收稿日期:2013-01-30 修回日期:2013-03-30 出版日期:2013-07-25 发布日期:2013-07-04
  • 通讯作者: 远光辉,男,1986年10月生,2009年获中国石油大学(华东)资源勘查工程专业学士学位,现为中国石油大学(华东)博士研究生,主要从事储层地质学方面的学习与研究。Email:youisland@163.com
  • 作者简介:操应长,男,1969年1月生,1992年获石油大学(华东)沉积地质专业学士学位,2003年获中国科学院地质学博士学位,现为中国石油大学教授、博士生导师,主要从事沉积学、层序地层学及油气储层地质学的教学和科研工作。 Email:cyc8391680@163.com
  • 基金资助:

    国家自然科学基金项目(No.U1262203、No.40972080);国家重大科技专项(2011ZX05006-003);中国石油大学(华东)研究生自主创新科研计划项目(12CX06003A)和中国石油大学(华东)优秀博士学位论文培育计划项目资助。

Types and characteristics of anomalously high porosity zones in Paleogene mid-deep buried reservoirs in the northern slope, Dongying sag

CAO Yingchang, YUAN Guanghui, LI Xiaoyan, YANG Tian, WANG Yanzhong   

  1. School of Geosciences, China University of Petroleum, Qingdao 266580, China
  • Received:2013-01-30 Revised:2013-03-30 Online:2013-07-25 Published:2013-07-04

摘要:

异常高孔带类型不同,其成因机制和油气勘探思路也不相同。根据异常高孔隙度储层中原生孔隙和次生孔隙的相对含量,将原生孔隙相对含量大于50% 的异常高孔带定义为原生孔隙型异常高孔带,将次生孔隙相对含量大于50% 的异常高孔带定义为次生孔隙型异常高孔带。东营凹陷北部陡坡带古近系异常流体超压和油气的大量充注等有效保存原生孔隙的地质因素普遍存在,但目前东营凹陷中深层异常高孔带仅被界定为次生孔隙型异常高孔带,其合理性值得商榷。通过对东营凹陷北部陡坡带沙河街组四段和三段中亚段碎屑岩储层的研究,北部陡坡带胜坨地区在2 800~3 300 m和3 300~3 700 m存在2个异常高孔带,其储集空间以原生孔隙为主,原生孔隙含量达到50% ~90%,属原生孔隙型异常高孔带;民丰地区在4 250~4 400 m和4 750~4 900 m存在2个异常高孔带,其储集空间以次生孔隙为主,次生孔隙含量达到60% ~90%,属次生孔隙型异常高孔带。

关键词: 原生孔隙, 次生孔隙, 异常高孔带, 古近系, 东营凹陷

Abstract:

Different types of anomalously high-porosity zones have different genetic mechanisms and require different exploration philosophy. According to relative content of primary pores versus secondary pores in reservoirs, anomalously high porosity zones can be divided into primary anomalously high porosity zone with content of primary pores more than 50% and secondary anomalously high porosity zone with content of secondary pores more than 50%. Though all the anomalously high porosity zones in Paleogene reservoirs in the northern steep slope zone of the Dongying sag are currently defined only as secondary porosity developed zones, there widely exist geological factors,which favour preservation of primary pores, such as fluid overpressure and enormous hydrocarbon filling. Therefore, a systematic study was carried out on clastic reservoirs in the Member 4 and the middle Member 3 of the Shahejie Formation in the northern steep slope zone of the Dongying sag. The results show that two anomalously high porosity zones develop at 2 800 ~3 300 m an d 3 300~3 700 m, respectively, in the Shengtuo area and content of primary pores is from 50% to 90%, indicating a primary anomalously high porosity zone. In addition, two anomalously high porosity zones develop at 4 250 ~4 400 m and 4 750 ~ 4 900 m, respectively, in the Minfeng area and content of secondary pores is from 60% to 90%, suggesting a secondary anomalously high porosity zone.

Key words: primary pore, secondary pore, anomalously high porosity zone, Paleogene, Dongying sag

中图分类号: