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Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield

A technology for engineering calculation and fluid production, which is used in surveying, earth-moving drilling and production, wellbore/well components, etc. It can solve the problems of not considering the integrity of the injection-production system, not considering the degree of well pattern matching, and long time.

Inactive Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The implementation of numerical simulation method requires many parameters, complex procedures, great difficulty and long time, while empirical methods are not reliable enough, and there are many problems in current reservoir engineering methods, which are mainly manifested in: (1) The calculation method of reasonable bottom hole pressure is not accurate enough; (2) The integrity of the injection-production system is not considered; (3) The degree of well pattern matching is not considered

Method used

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  • Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield
  • Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield
  • Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield

Examples

Experimental program
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Embodiment 1

[0061] The method for determining the reasonable liquid production rate of the reservoir includes the following steps:

[0062] Step 1, calculating the reasonable minimum bottomhole flowing pressure of the reservoir production well;

[0063] Step 2, calculating the reasonable water injection pressure of the water injection well;

[0064] Step 3, calculating the water absorption capacity and fluid production capacity of the reservoir;

[0065] Step 4, calculating the reasonable liquid production rate of the reservoir.

[0066] In order to make the above and other purposes, features and advantages of this embodiment more obvious and easy to understand, the following will introduce the specific process of reservoir engineering methods to determine the reasonable liquid production rate of the reservoir in combination with the technical principles, and at the same time give a better experimental example, and cooperate with the The attached tables and formulas are described in det...

experiment example 2

[0140] Taking Shengtuo Oilfield as an example, the invented technique for determining reservoir engineering with reasonable liquid production was applied to typical units of different sedimentary reservoirs (fluvial facies and delta facies sediments) in Shengli Oil Production Plant: (1) Shaer 9 in Shenger District ~10 units, this unit belongs to the delta facies pure water flooding unit, and it is feasible to restore the pressure of the current well pattern

[0141] Attached Table 1 Calculation Table of Reasonable Liquid Production in Units 9-10 of Sha 2, Sheng 2 District

[0142]

[0143] The optimal and reasonable formation pressure should be restored to 15.3MPa (pressure drop restored to 2.2MPa), and the average single well daily fluid should be reduced from the original 58m 3 / d increased to 200m 3 / d. By the end of 2015, the recovery rate will increase by 5.0%, and the recoverable reserves will increase by 17.7×10 4 t. The pressure is restored after the stratificat...

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Abstract

The invention discloses an oil reservoir engineering calculation method for determining a reasonable oil reservoir liquid yield. The oil reservoir engineering calculation method for determining the reasonable oil reservoir liquid yield is applied to the field of oil reservoir engineering parameter calculation. The oil reservoir engineering calculation method for determining the reasonable oil reservoir liquid yield comprises the following steps that 1, a calculation method for flowing bottomhole pressure in the reasonable submergence depth is derived; 2, reasonable injection pressure of a water injection well is calculated on the basis of an injection-production balance principle; 3, the water absorbing capacity and liquid production capacity of a oil reservoir are calculated; and 4, the reasonable oil reservoir liquid yield is determined according to a productivity formula. According to the oil reservoir engineering calculation method, the defect that partial adjustment is only conducted on part of single wells through traditional dynamic analysis is avoided, injection and production well technological conditions, formation water absorbing capacity and liquid production capacity, injection and production well network matching features and other factors are considered, and the reasonable liquid production capacity scale of the oil reservoir is made to be definite. Oil reservoir engineering parameters needed by the oil reservoir engineering calculation method is simple and easy to obtain, calculation is simple and convenient, the results are quantitative, and guidance can be provided for determining reasonable liquid production capacity of mid-high permeability oil reservoirs.

Description

Technical field: [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a calculation method for determining a reasonable liquid production rate of an oil reservoir. Background technique: [0002] At present, after decades of development in medium and high permeability sandstone oilfields, most of the main development units are in the late stage of ultra-high water cut development, and most oil wells are operating at low oil production levels. Although the benefit of a single well is not high, its production is still considerable due to the huge reserve scale and the number of wells opened. How to increase the oil production of medium-high permeability sandstone reservoirs and delay the comprehensive decline of reservoirs is of great significance for stabilizing the production of such reservoirs. Theoretical studies have shown that the water cut rises slowly in high water-cut oil wells, and high fluid production can im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/003
Inventor 陈瑞万海艳陶德硕刘伟伟唐从见佟颖张娣贾元元
Owner CHINA PETROLEUM & CHEM CORP
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