Unlock instant, AI-driven research and patent intelligence for your innovation.

Imbibition oil displacement effect evaluation device and use method thereof

An evaluation device and imbibition technology, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problems that the fracturing process and formation temperature and pressure conditions cannot be simulated, and achieve the effect of wide coverage

Pending Publication Date: 2020-11-24
SHAANXI YANCHANG PETROLEUM GRP
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device for evaluating the effect of imbibition flooding and its method of use, which can solve the problem that the current evaluation device and method of imbibition flooding effect cannot simulate the real fracturing process and formation temperature and pressure conditions. Evaluate the imbibition flooding effect of various water-based fracturing fluids added with imbibition agents in cores with different permeability, which is close to the real state of fracturing fluid in the formation

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
  • Imbibition oil displacement effect evaluation device and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Set the permeability to 1.1×10 -3 μm 2 After the natural core is fully saturated with crude oil, it is installed on the first acid and alkali resistant core holder 13, closes the first solution inlet valve 11 and the first outlet valve 16, and opens the confining pressure outlet main valve 21 and the first confining pressure inlet Valve 17, the manual pump 22 is used to add confining pressure to the first acid and alkali resistant core holder 13; the vent valve 3 connected to the first piston container 2 is closed, and 1L formula fracturing fluid is added to the first piston container 2 , Fracturing fluid formula: 0.3% hydroxypropyl guar gum + 1% potassium chloride + 0.1% fungicide CJSJ-1 + 0.3% osmotic agent CRS + 0.03% breaker ammonium persulfate, until the fracturing fluid is broken Then, open the solution outlet valve 5 connected to the first piston container 2 and the corresponding valves on the pressurizing valve 4 and the six-way valve 9, turn on the piston contain...

Embodiment 2

[0062] Set the permeability to 1.08×10 -3 μm 2 After the natural core is fully saturated with crude oil, it is installed on the second acid and alkali resistant core holder 12, the second solution inlet valve 10 and the second outlet valve 15 are closed, and the confining pressure outlet main valve 21 and the second confining pressure inlet are opened Valve 20 uses a manual pump 22 to add confining pressure to the second acid and alkali-resistant core holder 12; close the vent valve 3 connected to the second piston vessel 6, and add 1L of formula 2 fracturing fluid to the second piston vessel 6 , Fracturing fluid formula: 0.3% hydroxypropyl guar gum + 1% potassium chloride + 0.1% fungicide CJSJ-1 + 0.3% osmotic agent TGF-1 + 0.03% breaker ammonium persulfate, waiting for fracturing fluid After breaking the glue, open the solution outlet valve 5 connected with the second piston container 6 and the corresponding valves on the pressurizing valve 4 and the six-way valve 9, turn on 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 an imbibition oil displacement effect evaluation device and a use method thereof, and belongs to the field of oil and gas development. The imbibition oil displacement effect evaluation device comprises piston containers, pistons are arranged in the piston containers, and the inner area of each piston container is divided into a solution cavity and a pressure cavity; the three piston containers are the first piston container, the second piston container and the third piston container, and the solution cavities of the first piston container, the second piston container and the third piston container are connected with the same six-way valve through solution outlet valves; fluid pressurizing devices are arranged at the front ends of the inlets of the piston containers,and the pressurizing pump injection process of fracturing fluid entering a stratum can be simulated. According to the imbibition oil displacement effect evaluation device and the use method thereof,acid and alkali resistant core holding units are provided with the heating structures, the reservoir temperature can be simulated, confining pressure is set on the core holding units, the overburden pressure of the stratum can be simulated, and the temperature and pressure conditions are closer to the real stratum conditions.

Description

Technical field [0001] The invention belongs to the field of oil and gas development, and relates to a device and a method for evaluating oil displacement effects by imbibition. Background technique [0002] my country's low-permeability oil and gas reserves account for more than 65% of the country's oil and gas reserves, and low-permeability oil and gas reservoirs are widely distributed. The physical properties of low-permeability reservoirs are poor and uneven, and must undergo fracturing to obtain productivity. Tight reservoirs are often developed by horizontal well fracturing. During the fracturing process, it is found that only 10%-50% of the fracturing fluid can be discharged back, and the flowback rate is low, which causes certain damage to the reservoir. Adding an imbibition agent to the fracturing fluid, there is no need to deal with the flowback fluid after fracturing. The fracturing fluid remaining in the formation can not only supplement the formation energy, but als...

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): E21B43/22
CPCE21B43/16
Inventor 高志亮段玉秀杨洪南蓓蓓毛中源张锋三何静刘安邦朱容婷薛少飞万鑫顾菁华管雅倩李红孙淑娟
Owner SHAANXI YANCHANG PETROLEUM GRP