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Prediction method of water cut in early stage of production in ultra-low permeability sandstone reservoir

A technology for sandstone reservoirs and prediction methods, applied in prediction, data processing applications, instruments, etc., can solve problems such as unsystematic and hinder the efficient development of ultra-low permeability sandstone reservoirs in theory and technology research and development, etc. Improved water flooding recovery and significant economic and social benefits

Active Publication Date: 2022-02-11
GUANGDONG UNIV OF PETROCHEMICAL TECH
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Problems solved by technology

It can be seen that there are currently few and unsystematic studies on the causes of water cut in ultra-low permeability reservoirs when they are put into production and the prediction of water cut at the initial stage of oil well production. research and development

Method used

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  • Prediction method of water cut in early stage of production in ultra-low permeability sandstone reservoir
  • Prediction method of water cut in early stage of production in ultra-low permeability sandstone reservoir
  • Prediction method of water cut in early stage of production in ultra-low permeability sandstone reservoir

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Embodiment

[0028] like figure 1 As shown in the present invention, the method for predicting the water content in the initial stage of production of an oil well in an ultra-low permeability sandstone reservoir is as follows:

[0029] In step 101, according to the geological and development characteristics of the ultra-low permeability sandstone reservoir under study, the calculation parameters are collected and arranged to provide parameter values ​​for the prediction of water content in the initial stage of production of the subsequent oil wells. The reservoir calculation parameters include: pore volume of the reservoir under original conditions , rock volume ,Porosity , volume of bound water , bound water saturation ; compressibility of reservoir rock pore volume , the reservoir pressure drop , the compressibility of the reservoir irreducible water ; a drop in formation pressure , the decrease in pore volume , the volume change of bound water , the pore volume of t...

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Abstract

The invention discloses a method for predicting the water content of an ultra-low permeability sandstone oil well in the initial stage of production. The method includes: collecting and arranging the calculation parameters of the selected ultra-low permeability sandstone oil reservoir; using the functional relationship between effective stress and water saturation to predict ultra-low Water cut of wells in permeable sandstone reservoirs at the initial stage of production. The water cut prediction method of the ultra-low permeability sandstone reservoir oil wells in the early stage of production provides a theoretical basis for explaining and revealing the water cut of oil wells in this type of reservoirs and predicting the water cut of oil wells in the early stage of production. Therefore, it has certain theoretical and practical significance.

Description

technical field [0001] The invention relates to the field of high-efficiency development of ultra-low permeability sandstone oil reservoirs and greatly improving water flooding recovery, in particular to a method for predicting water content in the initial stage of production of oil wells in ultra-low permeability sandstone oil reservoirs. Background technique [0002] With the development of economic and technological level and the in-depth exploration and development of oil and gas resources, ultra-low permeability reservoirs have attracted more and more attention. Based on theoretical and field practice research results, my country defines a reservoir with an air permeability of 1 to 10 mD as an ultra-low permeability reservoir. During the development of this type of reservoir, it is found that the initial water cut of the oil well is different from the conventional understanding, and the phenomenon of high initial water cut after the oil well is put into production often...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 胡罡田选华李鹏春王刘英张晓雨唐永建傅仕豪林国平陈嘉杰陈敏谊何晓琳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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