西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

复杂裂缝网络系统油水相渗曲线特征实验研究

潘毅1 *,王攀荣2,宋道万3,董亚娟3,孙雷1   

  1. 1.“油气藏地质及开发工程”国家重点实验室·西南石油大学,四川成都610500;
    2. 中海石油(中国)有限公司湛江分公司,广东湛江524000;3. 中国石化股份胜利油田分公司,山东东营257015
  • 出版日期:2016-08-01 发布日期:2016-08-01
  • 通讯作者: 潘毅,E-mail:anyiswpu@126.com
  • 基金资助:

    国家科技重大专项(2011ZX05014 004)。

Experimental Researches on Relative Permeability Curve of Complex#br# Fracture System

PAN Yi1*, WANG Panrong2, SONG Daowan3, DONG Yajuan3, SUN Lei1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Zhanjiang Branch Co Ltd,CNOOC,Zhanjiang,Guangdong 524000,China
    3. Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257015,China
  • Online:2016-08-01 Published:2016-08-01

摘要:

裂缝系统油水相对渗透率曲线的研究对指导裂缝性碳酸盐岩油藏注水开发起至关重要的作用。以实际裂缝
性碳酸盐岩油藏储层地质特征为基础,设计并制作了裂缝系统逐渐由简单到复杂状态的多组大尺寸裂缝型渗流物理
模型。参照行业标准,采用非稳态法水驱油相渗实验测试方法,研究了裂缝系统中不同裂缝宽度与不同缝网结构和缝
网密度对油水相对渗透率曲线形态的影响。结果表明,裂缝系统平均裂缝宽度越大,油水相渗曲线形态越向交叉斜直
线形态靠近,两相共渗区范围越大;缝网密度越大,结构越复杂,相渗曲线中的束缚水饱和度就越大,两相共渗区范围
就越小,等渗点位置则逐渐向右移动。

关键词: 裂缝性碳酸盐岩油藏, 裂缝网络结构, 裂缝宽度, 裂缝密度, 相渗曲线

Abstract:

Oil-water relative permeability curve of fracture system is very important in the waterflooding process of naturally
fractured reservoirs. We designed and made a series of large size physical model of fracture system based on the geological
charac- teristics of a certain fractured carbonate reservoir. Oil-water relative permeability curves were measured by using
unsteady-state method.The influence of fracture density and average fracture aperture on oil-water relative permeability curves
was studied. The results show that the shape of relative permeability curve is close to X curve type,and common percolation area
of two phases turns wide. When the irreducible water saturation increases,the common percolation area of two phases reduces
with the fracture density growing. With greater fracture density,the structure becomes more complex,the irreducible water
saturation in the phase permeability curve greater,and the range of the two-phase percolation area smaller,and the position of
the seepage point gradually moves to the right.

Key words: fractured carbonate reservoi, structure of the fracture system, fracture aperture, fracture density, relative permeability
curve

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