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Improved calculating method of reasonable bottom hole flowing pressure

A technology of flow pressure and calculation method, which is applied in the field of reservoir engineering of petroleum exploration and development, and can solve problems such as the inability to correctly reflect the reasonable liquid production capacity of oil wells.

Inactive Publication Date: 2017-03-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, these bottomhole flow pressure calculation methods do not take into account the reasonable submergence requirements of pumping wells, and the calculation results are actually the minimum bottomhole flow pressure instead of a reasonable bottomhole flow pressure. Therefore, they cannot correctly reflect the reasonable liquid production capacity of the oil well. For this reason, we invented an improved calculation method of bottomhole flow pressure based on reasonable submergence, which solved the above problems

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  • Improved calculating method of reasonable bottom hole flowing pressure
  • Improved calculating method of reasonable bottom hole flowing pressure
  • Improved calculating method of reasonable bottom hole flowing pressure

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Embodiment Construction

[0022] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0023] Such as figure 1 as shown, figure 1 It is a flow chart of the improved calculation method for reasonable bottomhole flowing pressure of the present invention.

[0024] Step 101, collecting basic information of the reservoir; collecting basic static and dynamic information of the reservoir to provide parameters for calculating reasonable bottomhole flow pressure. In one embodiment, the collected information includes dissolved gas-oil ratio, filling coefficient, oil well water cut, natural gas dissolution coefficient, crude oil surface relative density, water surface relative density, and oil well water cut parameters. The process goes to step 102.

[0025] Step 102, calculate the pump mouth pressure of the oil well pump; according to the disso...

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Abstract

The invention provides an improved calculating method of reasonable bottom hole flowing pressure. The method includes the steps of firstly, collecting the basic static and dynamic information of an oil reservoir so as to provide parameters for the calculating of the reasonable bottom hole flowing pressure; secondly, calculating the pressure at the opening of an oil well pump; thirdly, determining the relation between pump efficiency and submergence depth, and optimizing the reasonable submergence depth of a pumping well; fourthly, improving a shaft fluid column pressure calculating method on the basis of the reasonable submergence depth; fifthly, using the sum of the pressure at the opening of the oil well pump and shaft fluid column pressure as the reasonable bottom hole flowing pressure. The improved calculating method has the advantages that the reasonable bottom hole flowing pressure result calculated by the method can favorably bring oil well productivity into play and can favorably allow an extra-high-water-cut-stage oilfield to keep long-term stable yield or have slowed progressive yield decreasing.

Description

technical field [0001] The invention relates to the field of oil reservoir engineering for oil exploration and development, in particular to a calculation method for reasonable bottom-hole flow pressure. Background technique [0002] Bottomhole flowing pressure (abbreviated as bottomhole flowing pressure) is a basic parameter for calculation and prediction of reservoir engineering in petroleum exploration and development. Large differences in liquid production level and unbalanced liquid production structure are one of the main reasons for low productivity and high water cut of reservoirs in the ultra-high water-cut period. Determining a reasonable liquid volume is of great significance for stable production or slowing down decline of reservoirs in the ultra-high water-cut period. The reasonable liquid volume is the product of the production pressure difference (that is, the difference between the formation pressure maintenance level and the bottom hole flow pressure) and th...

Claims

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Application Information

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IPC IPC(8): E21B47/06E21B49/00
Inventor 陈瑞刘志宏万海艳陶德硕刘伟伟张娣贾元元杨盛波赵培坤
Owner CHINA PETROLEUM & CHEM CORP
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