Abstract:

Abstract: On the basis of classification and interarchitecture of monosandbody, studies on the influencing factors of the water flood development of low permeability reservoirs were carried out with the combination of geological factors and productions. There are three major geological factors which affect the water flood effect of low permeability reservoir. The first is pore structure. The more complex the pore structure and the smaller the pore diameter, the worse the development effect of low permeability reservoir. The second is interarchitecture of monosandbody. The more complex, the worse the development effect. The third is the frequency of thin interbeds. Moderate thin interbeds improve production effect, but excessive interbeds will decrease the development effects. At the same time, development factors such as the flow characteristics, the Jamin effect and the pressuresensitive effect are also analyzed to see the the development effect of low permeability reservoir. The greater the initial pressure gradient, the worse the development effect. Jamin effect decreases the development effect. The more serious the pressuresensitive effect, the worse the development effect. In view of the above influencing factors, we propose five measures to improve the development effect including the commingled injection and production by monosandbody in small layer, horizontal well development, moderately enlarging production pressure, narrowing well spacing as far as possible and early water flooding.

Key words:  low permeability, architecture, water flooding, development effect