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

Combined thermal recovery method for thickened oil reservoir with gas cap

A technology for heavy oil reservoirs and gas caps, which is applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc., can solve problems such as low crude oil recovery, save steam, efficiently utilize, and expand the scope of application Effect

Active Publication Date: 2018-11-23
PETROCHINA CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of low oil recovery in heavy oil reservoirs with gas cap

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
  • Combined thermal recovery method for thickened oil reservoir with gas cap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] A combined thermal recovery method for heavy oil reservoirs with gas caps, in a space rectangular coordinate system with X, Y, and Z axes as coordinate axes, the combined thermal recovery method for heavy oil reservoirs with gas caps comprises the following steps:

[0027] Step 1. Screening suitable heavy oil reservoirs with gas cap;

[0028] Step 2, the stage of deploying vertical wells and horizontal wells three-dimensional combination well groups; along the X-axis direction, the second batch of well groups, the first batch of well groups and the second batch of well groups arranged in sequence of the vertical wells and horizontal well three-dimensional combination well groups, Both t...

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 discloses a combined thermal recovery method for a thickened oil reservoir with a gas cap. According to the method, heating of the top of an oil layer is achieved through a method of igniting the gas cap, and combustion heat of a top air layer is utilized to heat the whole oil layer, thereby reducing viscosity of crude on the contact face between the gas cap and a thickened oil layerand achieving the cross-well communication between a vertical well and a horizontal well; flue gases produced after combustion further reduces the viscosity of the thickened oil and provides energy to the entire oil reservoir. The combined thermal recovery method for the thickened oil reservoir with the gas cap not only achieves the exploitation of the thickened oil reservoir with the gas cap, but also saves the steam injection amount through the combustion of the gas cap, and entirely improves the comprehensive benefits of the thickened oil exploitation in the vertical well and horizontal well in a steam driving stage.

Description

technical field [0001] The invention relates to the technical field of oil recovery in heavy oil fields with gas caps, in particular to a combined thermal recovery method for heavy oil reservoirs with gas caps. Background technique [0002] The distribution of gas cap heavy oil reservoirs is complex, and the influence of reservoir heterogeneity makes the movement of oil and gas and oil and water more complicated. At present, there is no very effective development method for heavy oil reservoirs with gas cap. If only oil is produced but no gas is produced, the steam injected into the lower oil layer is easily lost to the gas layer, which reduces the development effect of steam injection. If in order to eliminate the hidden dangers of heavy oil production in the later stage, if the gas is produced first and the heavy oil is not recovered, as the pressure decreases, the light crude oil in the heavy oil will invade the gas cap area, so that the density of hydrocarbons in the oi...

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): E21B43/24E21B43/243
CPCE21B43/24E21B43/2406E21B43/243
Inventor 周游刘彤张忠义席长丰齐宗耀
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