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

Fixed-point gel-placing water shutoff profile control agent and use method thereof

A technology of water profile control agent and gel, which is applied in chemical instruments and methods, earthwork drilling, mining fluids, etc., can solve problems such as hindering the advancing route of the slug behind and difficult to realize deep water plugging and profile control, and shorten the construction period. Period, the effect of ensuring the effect of measures

Active Publication Date: 2012-07-25
PETROCHINA CO LTD
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of water plugging and profile control combined with different slugs has no obvious difference in delayed cross-linking time, often before the construction is over, the front slugs have been gelled, which hinders the advancing route of the latter slugs. For ultra-low permeability reservoirs , it is difficult to realize deep water plugging and profile control

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
  • Fixed-point gel-placing water shutoff profile control agent and use method thereof
  • Fixed-point gel-placing water shutoff profile control agent and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: No. 1 water well and oil well, refer to figure 1 .

[0023] Step 1. On February 3 of a certain year, inject 1.5% ammonium thiocyanate and sodium bromide aqueous solution into the No. 1 water well through a cement truck. 3 . And start timing, and stop timing when the tracer is detected in the oil well on February 29, and the cumulative journey is 26 days. Take the water well as the starting point and connect a straight line with the oil well as the end point. The 70% point of the distance between the oil and water wells in the advancing direction of the injected water is the remote target position point for profile control. The distance between the remote target position point (F) and the water well is The horizontal distance between them is equally divided into six sections; the end point of each section is set as a target location point, and each target location point is sorted into target location points A, B, C, D, E, and F in turn.

[0024] Step 2. ...

Embodiment 2

[0071] Embodiment 2: No. 2 water well and oil well, refer to figure 1 .

[0072] Step 1. On March 10 of a certain year, the actual daily water injection is 23m 3 , inject 15m of 1.5% ammonium thiocyanate and sodium bromide aqueous solution into the No. 2 water well by cement truck 3 . And start timing, and stop timing on April 14 when the tracer is detected in the oil well, and the accumulated journey is 35 days. Taking the water well as the starting point and the oil well as the end point to connect a straight line, the 60% point of the distance between the oil and water wells in the advancing direction of the injected water is the remote target point of profile control, and the distance between the remote target point (F*) and the water well The horizontal distance between them is equally divided into six segments; the end point of each segment is set as a target position point, and each target position point is sorted into target position points A*, B*, C*, D*, E* , F*....

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 relates to a use method of a fixed-point gel-placing water shutoff profile control agent, which is applied to water shutoff profile control of oil field flooding. The use method comprises the following steps of: step 1, pumping tracer suspension liquid to a water well via a cement truck, and timing, setting a terminal point of each section as a destination point, and ordering the destination points in sequence; step 2, calculating the time of the fixed-point gel-placing water shutoff profile control agent expected to reach each destination point, respectively; regulating the mass ratio of components of the fixed-point gel-placing water shutoff profile control agent according to the delay crosslinking time corresponding to the fixed-point gel-placing water shutoff profile control agent; and establishing the fixed-point gel-placing water shutoff profile control agent corresponding to the delay crosslinking time; and step 3, injecting the fixed-point gel-placing water shutoff profile control agent to the water well by using an electric pump; sequentially and continuously injecting to each destination point; closing the water well to complete the process of injecting the fixed-point gel-placing water shutoff profile control agent to the water well. The use method of the fixed-point gel-placing water shutoff profile control agent has the following effects: the water shutoff profile control can be better implemented, the measurement effect is guaranteed, the well is not needed to close for a long period of time, and the construction period of the water shutoff profile control is shortened.

Description

technical field [0001] The invention relates to the technical field of water flooding and oil production in oilfields, in particular to fixed-point placement of a gel water plugging and profile control agent for tight reservoirs in ultra-low permeability reservoirs and a method for using the gel water plugging and profile control agent. Background technique [0002] At present, some ultra-low permeability reservoirs in Changqing have developed fractures. During the water injection development process, due to the serious heterogeneity of the reservoir, the injected water channeled along the high permeability zone, resulting in poor sweeping effect of injected water and rapid rise of water cut in oil wells. Therefore, in order to improve the water injection sweep coefficient and improve the water injection development effect, using deep water plugging to control profile is a phased technology for oilfield development with medium and high water cut, and it is also a practical wa...

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 Applications(China)
IPC IPC(8): E21B43/22E21B43/20C09K8/44C09K8/58
Inventor 赵继勇常彦荣陆红军李建山陈宝春董立全曹润荣陈文斌常笃杜现飞段鹏辉李楷赵修太
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