Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Petroleum reservoir carbon dioxide miscible flooding pressure prediction method and device

A technology of carbon dioxide and prediction methods, which is applied in earth-moving drilling, special data processing applications, and production of fluids, etc., can solve the problems of difficult component data, prediction of minimum miscible pressure of carbon dioxide flooding reservoirs, lack of empirical formulas, etc. Quick and easy predictions

Active Publication Date: 2016-03-16
PETROCHINA CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for predicting the miscible pressure of a carbon dioxide flooding reservoir to solve the difficulty in obtaining the molecular weight and component data of crude oil in each reservoir block in the prior art, and many empirical formulas lack corresponding data , it is difficult to quickly predict the minimum miscible pressure of carbon dioxide flooding reservoirs by relying on conventional reservoir parameters

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
  • Petroleum reservoir carbon dioxide miscible flooding pressure prediction method and device
  • Petroleum reservoir carbon dioxide miscible flooding pressure prediction method and device
  • Petroleum reservoir carbon dioxide miscible flooding pressure prediction method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0066] Such as figure 1 As shown, a method for predicting the miscible pressure of a carbon dioxide flooding reservoir provided by an embodiment of the present invention includes:

[0067] Step 101. Obtain basic parameters for predicting the miscible pressure of the carbon dioxide flooding reservoir.

[0068] The basic parameters include: reservoir temperature, reservoir original formation pressure, and crude oil viscosity at current reservoir conditions.

...

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 provides a petroleum reservoir carbon dioxide miscible flooding pressure prediction method and device and relates to the technical field of petroleum reservoir exploitation. The method includes the steps that the basic parameters for predicting petroleum reservoir carbon dioxide miscible flooding pressure are obtained; the solubility parameter of petroleum is determined; petroleum reservoir initial reservoir pressure serves as the trial pressure value, the current trial pressure value and the carbon dioxide density at the petroleum reservoir temperature are determined, and the solubility parameter of the carbon dioxide is determined; the absolute value of the difference of the solubility parameter of the petroleum and the solubility parameter of the carbon dioxide is determined; if the error of the absolute value of the difference and the preset threshold value is smaller than the preset error value, the trial pressure value serves as the minimum petroleum reservoir carbon dioxide miscible flooding pressure; and if the error is larger than or equal to the preset error value, the trial pressure value is adjusted, the updated trial pressure value is formed, the current trial pressure value and the density of the carbon dioxide at the petroleum reservoir temperature are re-determined, and the solubility parameter of the carbon dioxide is re-determined till the error is smaller than the preset error value.

Description

technical field [0001] The invention relates to the technical field of reservoir development, in particular to a method and device for predicting the miscible pressure of a carbon dioxide flooding reservoir. Background technique [0002] Currently, in carbon dioxide (CO 2 ) flooding reservoir development process, since the oil displacement efficiency of miscible flooding is better than that of immiscible flooding, the determination of the minimum miscible pressure becomes the key basic parameter for the evaluation of development effect. At present, experimental measurement is the main means to accurately obtain the minimum miscibility pressure of carbon dioxide flooding, but the process of experimental measurement is complicated and time-consuming, and this method is not applicable in the stage of reservoir screening or potential evaluation. [0003] Aiming at this problem, some empirical formulas have been proposed in the prior art to predict the minimum miscibility pressu...

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
IPC IPC(8): E21B43/16G06F17/50
Inventor 周体尧杨思玉杨永智张曙光宫伟高建
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com