A Method for Evaluating Effectiveness of Water Injection Development in Oil Production Wells

An evaluation method and technology for oil wells, which are applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., which can solve the problems of inability to quantify, spend a lot of time observing, and eliminate many factors.

Active Publication Date: 2021-07-30
PETROCHINA CO LTD
View PDF8 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method for Evaluating Effectiveness of Water Injection Development in Oil Production Wells
  • A Method for Evaluating Effectiveness of Water Injection Development in Oil Production Wells
  • A Method for Evaluating Effectiveness of Water Injection Development in Oil Production Wells

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 standard wells; standard wells are effective oi...

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of oilfield development, and in particular relates to a method for evaluating the effectiveness of water injection development in oil production wells, which introduces two parameters: a decline rate of effectiveness and an effectiveness coefficient, and the contents include: collecting production data of oil production wells; The production time node of the effect and the actual production output under this time node; select the standard well; calculate the standard decline rate; calculate the effective theoretical output of the target oil production well; calculate the effective coefficient of the target oil production well. This method overcomes the defect that traditional methods can only qualitatively judge whether a single oil well is effective or not, and cannot further evaluate the effectiveness of the entire oil reservoir. The effective results have laid the foundation for further 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap