新疆石油地质

新疆石油地质 ›› 2002, Vol. 23 ›› Issue (4): 314-316.

• 油藏工程 • 上一篇    下一篇

预测水驱砂岩油藏含水上升规律的新方法

俞启泰   

  1. 中国石油 石油勘探开发科学研究院,北京 100083
  • 收稿日期:2001-12-10 出版日期:2002-08-01 发布日期:2020-08-10
  • 作者简介:俞启泰(1940-),男,浙江绍兴人,教授级高级工程师,油藏工程。

A New Method for Predicting Laws of Water Cut Raising in Sandstone Reservoir by Waterflooding Process

YU Qi-tai   

  • Received:2001-12-10 Online:2002-08-01 Published:2020-08-10
  • About author:YU Qi-tai (1940-), Male, Professor of Engineering, Reservoir Engineering, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China

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摘要： Y1 水驱特征曲线是一种广义水驱特征曲线;其斜率b可以反映不同的含水上升规律,我国油田根据地层原油粘度μ。可分为低粘(μ0<3 mPa·s)、中粘(3 mPa·s<μ0<30 mPa·s)和高粘(μ0>30 mPa·s)三级。根据34个低粘砂岩油田、35个中粘砂岩油田和19个高粘砂岩油田的数据,用Y1水驱特征曲线计算它们的6值,并与空气渗透率建立联系,发现可将油田分为低渗(K<100×10-3 μm2)、中渗(100×10-3 μm2<K<600×10-3 μm2)和高渗(K>600×10-3 μum2)三级。分别对低粘、中粘和高粘油田以及所有油田的b值和它们的K、μ0值,用二元回归法得出了计算b值的回归公式。该公式可用于新油藏的开发评价与设计,预测含水率与可采储量采出程度关系。实例表明该公式的预测结果有一定的准确性。

关键词: 水驱特征曲线, 含水率, 采出程度, 预测

Abstract: The Y1 water drive curve, which is a generalized water drive curve, can reflect different laws of water cut raising by its slope b. In terms of varying oil viscosity μ0 in different formations obtained from domestic oilfields, it can be divided into low viscosity (μ0< 3 mPa·s), medium viscosity (3 mPa·s<μ0< 30 mPa·s) and high viscosity (μ0> 30 mPa·s). According to data of 34 oilfields with low viscosity, 35 oilfields with medium viscosity and 19 oilfields with high viscosity, calculation of b for these fields are made by using Y1 water drive curve. After constructing the contact of b and permeability K, it is found that these fields can be divided into three types in terms of low permeability (K< 100×10-3 μm2),medium permeability (100×10-3 μm2<K< 600×10-3 μm2) and high permeability (K> 600×10-3 μum2). According to b, K and μ0 from these 88 oilfields, binary regression method is applied to obtain regression equations for calculating b,which can be used to predict the relationship of water cut Vs recovery of recoverable reserves for development evaluation and design of the new oilfields. An example shows that the results calculated by using these equations have a certain accuracy.

Key words: water drive curve, water cut, recovery factor, prediction

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