Method for relieving water blocking at high temperature in oil and gas exploitation process

A medium-high temperature technology for oil and gas production, applied in earthwork drilling, isolation devices, boreholes/well components, etc., can solve problems such as difficulty in installing high-power microwaves and high power requirements, and improve gas phase permeability and cost Low, damage-reducing effect

Inactive Publication Date: 2014-05-14
SOUTHWEST PETROLEUM UNIV
View PDF7 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of them involve the method of using high temperature evaporation
[0004] Compared with the patent CN102536165A "method and device for removing water lock damage in low-permeability tight sandstone gas layers", microwave heating is char

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
  • Method for relieving water blocking at high temperature in oil and gas exploitation process
  • Method for relieving water blocking at high temperature in oil and gas exploitation process
  • Method for relieving water blocking at high temperature in oil and gas exploitation process

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] The present invention will be further described below in conjunction with the drawings.

[0027] See figure 1 .

[0028] The steel wire armored high-voltage cable 6 is connected to an electric heating rod 7, and the steel wire armored high-voltage cable 6 is lowered into the oil pipe 4 by using the step-up transformer 1, the ground mains power supply 2 and the drawworks 3 on the ground of the well site. 5. The electric heating rod 7 is then lowered to the corresponding depth of the reservoir section 8.

[0029] See figure 2 .

[0030] The steel wire armored high-voltage cable 6 is connected to an electric heating rod. The electric heating rod has a power supply electrode 10 and a power supply loop electrode 13. The quartz glass cover 9 has a tungsten wire 11, a tungsten wire support 12, and a hydrogen bromide gas 14.

[0031] See image 3 .

[0032] After the electric heating rod connected with the steel wire armored high-voltage cable is lowered into the reservoir section with...

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

PropertyMeasurementUnit
Fever temperatureaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for relieving water blocking at a high temperature in the oil and gas exploitation process. According to the method, an electrical heating rod is lowered into a reservoir stratum segment and is heated to a certain temperature, heat is transferred into a formation water blocking area through a casing pipe and a cement sheath, formation fluid in gaps is heated to evaporate and flow into a shaft, and then damages caused by water blocking can be avoided. The diameter of the electrical heating rod is 4/5 the inner diameter of the casing pipe of the reservoir stratum segment; the length of the electrical heating rod should be equal to the thickness of the reservoir stratum segment, and the electrical heating rod can be formed by connecting a plurality of fixed-length heating rods in series; the electrical heating rod should be parallel to the reservoir stratum segment when lowered into the reservoir stratum segment; the heating temperature of the electrical heating rod ranges from 300 DEG C to 600 DEG C, and the heating time is estimated. Principles are reliable, and the method is easy and convenient to implement, capable of effectively solving the problem of formation water blocking and suitable for barefoot well completion as well as cased hole completion and has broad application prospects.

Description

technical field [0001] The invention relates to a method for releasing formation water lock in the field of oil and gas exploitation, which can effectively improve the recovery rate. Background technique [0002] In the process of drilling, well completion, workover and production operations, in many cases, the phenomenon of foreign fluids staying in porous media is called water lock phenomenon. The water locking phenomenon will cause the increase of water saturation near the wellbore or the increase of the saturation of the original immiscible phase in the porous medium, the increase of the capillary resistance of the oil-water interface in the rock pores, and the Jamin effect, so that the crude oil in the formation is more productive than normal. In this state, an additional flow resistance will be generated, which will damage the relative permeability of oil and gas. Macroscopically, the crude oil production of oil wells will decrease, which will hinder oil and gas exploi...

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): E21B36/04
Inventor 陈一健李皋王希勇李诚李永杰孟英峰杨旭肖贵林毛迪
Owner SOUTHWEST PETROLEUM UNIV
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