新疆石油地质 ›› 2006, Vol. 27 ›› Issue (1): 104-106.

• 应用技术 • 上一篇    下一篇

用毛细管压力曲线确定储集层孔隙喉道半径下限

万文胜a, 杜军社a, 佟国彰b, 邹民a, 秦旭生c, 谭文东a, 南惠a   

  1. 中国石油新疆油田分公司:a. 准东采油厂准东勘探开发研究所; b. 准东石油技术有限公司; c. 彩南作业区, 新疆阜康831511
  • 收稿日期:2005-03-23 修回日期:2005-03-23 发布日期:2020-10-19
  • 作者简介:万文胜( 1968-),男,湖南湘潭人,高级工程师,石油地质,(Tel)0994- 3832334(E- mail)wanws@petrochina.com.cn.

Application of Capillary Pr essur e to Determination of Cut-off Pore-Throat Radius in Reservoirs

WAN Wen-shenga, DU Jun-shea, TONG Guo-zhangb, ZOU Mina, QIN Xu-shengc, TAN Wen-donga, NAN Huia   

  1. Xinjiang Oilfield Company, PetroChina: a. Zhundong Institute of Exploration and Development, Zhundong Production Plant; b. Zhundong Petroleum Technology Company Ltd; c. Cainan Oilfield, Fukang, Xinjiang 831511, China
  • Received:2005-03-23 Revised:2005-03-23 Published:2020-10-19

摘要: 毛细管压力曲线是研究储集层孔隙喉道结构的基础,是油藏评价的重要组成部分。对毛细管压力曲线进行处理即对孔隙喉道半径与进汞饱和度作对数与累计概率图,可以给出类似于粒度概率累计曲线悬浮段的直线段的油藏含义。该段代表的是难流动和不流动孔隙群,可直接读取主要流动孔隙喉道半径的下限值。这一下限值得到了传统求流动孔隙喉道方法和现代核磁研究的验证。另外,将毛细管压力曲线和核磁共振t2 谱相结合可以求出含油孔隙喉道半径下限值。

关键词: 毛细管压力曲线, 概率, 核磁共振, 孔隙喉道半径, 界限

Abstract: The logarithmic graph and the cumulative probability diagram for pore-throat radius vs mercury injection saturation are presented, in which the straight-line portion similar with the suspending line portion on cumulative grain-size probability curve means the difficult-to-flow and stagnation pore domains in reservoirs, from which the typical cut-off pore-throat radius is read directly and verified by the conventional pore-throat radius method and the modern nuclear magnetic resonance technique. In addition, the combination of capillary pressure curve and spectrum t2 of nuclear magnetic resonance can help to directly determine the cut-off oil-bearing pore-throat radius.

Key words: capillary pressure curve, probability, nuclear magnetic resonance, pore-throat radius, limitation, cut-off value

中图分类号: