石油与天然气地质 ›› 1996, Vol. 17 ›› Issue (4): 343-346.doi: 10.11743/ogg19960415

• 论文 • 上一篇    下一篇

川东石炭系有效储层下限标准的确定

周文1, 王允诚1, 张高信2, 冉宏2, 蒲家奇2   

  1. 1. 成都理工学院, 四川成都 610059;
    2. 四川石油管理局川东开发公司, 四川重庆 630021
  • 收稿日期:1995-09-07 修回日期:1995-12-15 出版日期:1996-12-25 发布日期:2012-01-16

DEFINITION OF LOWER LIMIT OF CARBONIFEROUS NET PAY RESERVOIRS IN EAST SICHUAN

Zhou Wen1, Wang Yuncheng1, Zhang Gaoxing2, Ran Hong2, Pu Jiaqi2   

  1. 1. Chengdu Institute of Technology, Chengdu, Sichuan;
    2. East Sichuan Gas Development Co, Sichuan PetroleumAdministration, Chongqing, Sichuan
  • Received:1995-09-07 Revised:1995-12-15 Online:1996-12-25 Published:2012-01-16

PDF (PC)

750

被引次数

21

摘要：

将川东石炭系储层划分为中孔中渗(Ⅰ级)、中孔低渗(Ⅱ级)、低孔低渗(Ⅲ级)和超低孔渗(Ⅳ级)4级,提出以2%及50%的孔隙度、含水饱和度界线划分储层和非储层,再依据储层级别及其所处气水界面以上位置,通过对比注入浮力与各级别毛细管阻力大小,来判断储层是否为有效储层的方法──浮力-毛细管阻力比较法。通过比较认为,Ⅰ级、Ⅱ级、ⅢA级、ⅢB级储层只要分别位于气水界面以上5m,25m,60m和100m,即为有效储层。

关键词: 川东, 石炭系, 白云岩储层, 有效储层下限标准, 特殊物性, 孔隙结构

Abstract:

Carboniferous dolomite reservoirs in East Sichuan could be divided into four grade: 1.middle porsity-middle permeability(grade-I); 2. middle porosity-lower permeability (gradeⅡ); 3. lower porosity-lower permeability (grade-Ⅲ); 4. ultra low porosity-ultra low permeability (grade-Ⅳ).Reservoirs and nonreservoirs could be distinguished by 20% of porosityand 50% of water saturation. Based on the reservoir grades and their position above watergas boundary, the contrast of injected buoyance and different capillary pressures, a newmethod-bouyance-capillary pressure contrast method is proposed in this paper so as to determine a reservoir to be net pay one or not. The result suggests that the reservoirs ofgraded I above water-gas boundary 5 m,of grade-Ⅱ above the boundary 25 m, of grade-ⅢA above the boundary 60 m and of grade-ⅢB above the boundary 100 m are all net pay reservolrs.