A kind of nitrogen foam gel plugging regulating agent and its preparation method and application
A foam gel, nitrogen foam technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of unreachable temperature, inability to form glue, inapplicability, etc., and achieve good membrane strength , good plugging effect, and the effect of improving mining efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0031] In the second aspect, the embodiment of the present invention also provides a preparation method of the above nitrogen foam gel temporary plugging agent, the method includes:
[0032] According to the mass percentage of each component, add polyacrylamide, foaming agent, foam stabilizer, organic chromium crosslinking agent, and water into the reaction kettle and stir evenly, then place the reaction kettle in the oven to stand still to obtain a gel , And finally pass nitrogen into the gel to obtain a nitrogen foam gel plugging agent.
[0033] The preparation method of the above-mentioned nitrogen foam gel plugging control agent is simple, and the obtained nitrogen foam gel plugging control agent has good plugging effect, can reduce the number of gas cones and steam channeling channels, can improve the production efficiency of crude oil, and can be widely promoted use.
[0034] Each component can be dissolved in an appropriate amount of water before being evenly mixed and stirre...
Embodiment 1
[0049] In this example, the plugging effect of the nitrogen foam gel plugging agent was evaluated. The specific test process is as follows: select a cemented core of φ250×900 for the air-sealing model experiment, first fix the core in the middle of the cylinder, then inject air from the left end of the cylinder, and install a 10L transition vessel at the other end, and then connect it Air meter, reading Q after 3 minutes ventilation at a rate of 20 mL per minute 1 Then inject 3 times the volume of the core volume of the mixed solution for preparing the gel into the core, and then inject nitrogen gas with a volume ratio of 70:1 to the gel into the cylinder, and keep it at 40°C. Let stand for 10h under the conditions of, inject air from the left end of the cylinder for 3 minutes, and read Q 2 It is 9mL, and finally calculated according to the following formula to obtain the plugging rate of the nitrogen foam gel plugging agent:
[0050]
[0051] Among them, η is the blocking rate, ...
Embodiment 2
[0055] In this example, the plugging effect of the nitrogen foam gel plugging agent was evaluated. The specific test process is the same as the process of obtaining the plugging rate of the nitrogen foam gel plugging agent in Example 1, except that it is allowed to stand at 50°C for 9 hours, and then the cylinder is injected with gelatinous substance. The volume ratio of nitrogen is 80:1. The mixed solution used to prepare the gel includes: 2kg polyacrylamide, 2kg chromium lactate, 0.5kg sodium alkylbenzene sulfonate, 1kg sodium carboxymethyl cellulose, 94.5kg water.
[0056] The test results show that the blocking rate of the above nitrogen foam gel plugging agent is 88%. It can be seen that the nitrogen foam gel plugging regulator provided by the embodiment of the present invention can be used to plug gas cones, steam channeling channels or cracks in medium and low temperature oil layers at 30°C to 70°C, so as to improve the efficiency of crude oil production and meet the requ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More