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Effectiveness evaluation method for oil producing water injection development

An evaluation method and technology for oil production wells, applied in the fields of production fluid, earthwork drilling and production, wellbore/well components, etc., can solve problems that cannot be quantified, take a lot of time to observe, and have many factors to be eliminated

Active Publication Date: 2019-11-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following defects: first, the effect identified by this method is qualitative and cannot be quantified; second, the speed of this method is relatively slow, and it takes a lot of time to observe the production curve of each oil well, and there are many factors that need to be eliminated; It is impossible to evaluate the effectiveness of the reservoir as a whole

Method used

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  • Effectiveness evaluation method for oil producing water injection development
  • Effectiveness evaluation method for oil producing water injection development
  • Effectiveness evaluation method for oil producing water injection development

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a method for evaluating the effectiveness of water injection development in oil production wells, including the following steps:

[0048] Step 1) collect monthly production data of all oil production wells in the oil reservoir to obtain daily oil production;

[0049] Step 2) Determine the production time node M that needs to quantify the effective effect of the target oil production well 0 , and the production time node M 0 The actual daily oil production Q n ;

[0050] Step 3) select standard well;

[0051] Step 4) Calculate the initial daily oil production Q of the standard well 0t ;

[0052] Step 5) According to the initial daily oil production Q of the standard well 0t and the standard well at the production time node M that needs to quantify the effective effect 0 Nissan Oil Q 0 , to calculate the effective decline rate D of the standard well 0 ;

[0053] Step 6) Calculate the initial daily oil production Q of the target oil produ...

Embodiment 2

[0060] This embodiment provides a method for evaluating the effectiveness of water injection development in oil production wells, including the following steps:

[0061] Step 1) collecting the monthly production data of all oil production wells in the oil reservoir to obtain daily oil production; the monthly production data of the oil production wells are all monthly production data since putting into production;

[0062] Step 2) Determine the production time node M that needs to quantify the effective effect of the target oil production well 0 , and the production time node M 0 The actual daily oil production Q n ; Among them, the target production well needs to quantify the effective production time node M 0 Not less than 6 months;

[0063] For example, it is necessary to quantify the effective effect of production well A in the 24th production month, M 0 The value is 24, the actual output is Q n .

[0064] Step 3) Select a standard well; a standard well is an effectiv...

Embodiment 3

[0090] A certain water injection development reservoir is selected, and on the basis of Example 2, this embodiment quantifies the effective effect of oil production wells (horizontal wells) in the reservoir according to this method.

[0091] Step 1: Collect monthly production data (daily oil production level) of the reservoir;

[0092] Step 2: Determine the target horizontal well A and the production time node M that needs to quantify the effect 0 = 24 and the actual production output Q at this time node n =6.19t / d;

[0093] Step 3: Select GP0 as the standard well by collecting dynamic monitoring data of reservoir wells and observing the production curves of each production well;

[0094] Step 4: Calculate the initial production of GP0, through data extraction, q 01 =8.37t / d,q 02 =8.22t / d,q 03 =7.77t / d, calculate Q 0t =8.12t / d;

[0095] Step 5: Calculate the effective decline rate D 0 , through data extraction, the standard well production month is 24 daily oil product...

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Abstract

The invention belongs to the technical field of oilfield development, and particularly relates to an effectiveness evaluation method for oil producing water injection development. Two parameters of effective declining rate and effective coefficient are introduced, and the effectiveness evaluation method comprises the steps: target oil producing wells, production time nodes needing to quantifying effectiveness and the actual production yield under the time nodes are determined; standard wells are selected; the standard declining rate is calculated; the effective theoretical yield of the targetoil producing wells is calculated; and the effective coefficient of the target oil producing wells is calculated. According to the effectiveness evaluation method, the defects that a traditional method can only conduct qualitative judgment of good or bad effectiveness on one single oil producing well and cannot conducts further effective degree evaluation on a whole oil reservoir are overcome, theeffectiveness of one single well and the whole oil reservoir in different production periods can be quickly quantified, and a foundation is laid for further oil reservoir research.

Description

technical field [0001] The invention belongs to the technical field of oil field development, and in particular relates to a method for evaluating the effective effect of water injection development of oil production wells. Background technique [0002] Water injection development is one of the methods widely used in oilfield development to enhance the ultimate recovery of oil reservoirs. After water injection in the water injection well, the formation pressure increases and spreads continuously along the streamline direction to the oil production well. When the pressure is transmitted to the oil production well, the oil production well begins to take effect and the development effect is improved. With the further fine management of water flooding reservoir development, further evaluation of development effect is required. [0003] Usually, in addition to using development indicators to measure the overall reservoir, it is also required to evaluate the water flooding effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B47/00G06Q10/06G06Q50/02G06Q50/06
CPCE21B43/20E21B47/00G06Q10/0639G06Q50/02G06Q50/06
Inventor 张原立王晶刘俊刚李洪畅王小娟王睿恒欧泉旺
Owner PETROCHINA CO LTD
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