A new type of floating solid foam row rod and its preparation method

A technology of soaking rods and solids, which is applied to chemical instruments and methods, mining fluids, earth drilling and mining, etc., can solve the problems of slow dissolution rate, small contact surface, inconvenient storage and use, etc., and achieves the simple and easy preparation method, Enhance foam stability and good compatibility

Active Publication Date: 2019-11-22
陕西森瑞石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design of three fan blades increases the contact area between the foaming agent and the bottom well fluid to a certain extent, and shortens the dissolving time of the foam stripping rod in the bottom well fluid, but the preparation of this foam stripping rod is complicated and not easy. Easy to store and use
[0008] (1) The density of foam row sticks is usually 1.2 ~ 1.4g / cm 3 , greater than the wellbore fluid density 1.05 ~ 1.15g / cm 3 After being put into the wellbore, it will gradually sink into the bottom of the well. The deeper the foam row rod is immersed in the bottom of the well, the greater the force of the accumulated fluid pressure on the foam row rod, and the less likely it is to generate air bubbles, so that the foaming effect cannot be fully exerted, and serious Those who will block the bottom of the well;
[0009] (2) The contact surface between the cylindrical foam row rod and the bottom of the well is small, and the dissolution rate is relatively slow, which cannot effectively play the role of the foam row rod

Method used

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  • A new type of floating solid foam row rod and its preparation method
  • A new type of floating solid foam row rod and its preparation method
  • A new type of floating solid foam row rod and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This example provides the components and proportions of several floatable solid foam discharge sticks, and also provides the preparation method of each foam discharge stick.

[0047] (1) Floatable solid bubble row stick SRP-1

[0048] The components and their proportions are: 50 kg of dodecyl ethoxy sulfobetaine, 15 kg of cocoic acid monoethanolamide, 10 kg of thiourea, 5 kg of sodium chloride, 3 kg of polyvinyl alcohol, and 2 kg of sodium benzoate.

[0049] The preparation method of floating solid bubble row stick SRP-1:

[0050] Step 1: Put 50 kg of lauryl ethoxy sulfobetaine, 15 kg of cocoic acid monoethanolamide, and 10 kg of thiourea into a container, mix well, heat to 50°C, and heat-preserve and dry for 3 hours.

[0051] Step 2: Add 5 kg of sodium chloride, 3 kg of polyvinyl alcohol, and 2 kg of sodium benzoate into the container of step 1, mix evenly, start heating, gradually heat up to 80 ° C, and keep warm for 5 hours until the material is dried;

[0052] Ste...

Embodiment 2

[0078] The above-mentioned floatable solid bubble-discharge sticks SRP-1, SRP-2, SRP-3, SRP-4, and SRP-5 were prepared according to the preparation method described in Example 1 to prepare bubble-discharge sticks. For the structure of these sticks see Figure 1 to Figure 4 .

[0079] Such as figure 1 and 4 As shown, this embodiment provides a kind of floating foam row rod for gas recovery in oil and gas fields. In terms of overall appearance, the bubble discharge rod is similar to the existing foam discharge rod, and is a cylindrical rod 1 made of foam discharge agent. The difference is that arc-shaped transition sections 2 are provided at both ends of the bubble discharge stick in this embodiment, and threads 4 are provided on the surfaces of the cylindrical rod body 1 and the arc-shaped transition section 2 . It should be noted that the cylindrical rod body 1 and the arc-shaped transition sections 2 at both ends are of an integral structure.

[0080] In this embodiment,...

Embodiment 3

[0084] In this example, the performance of the floatable solid bubble discharge sticks SRP-1, SRP-2, SRP-3, SRP-4, and SRP-5 was tested, and compared with the performance of the commercially available bubble discharge stick UT-6. Refer to industry standard SY / T5761-1995, design performance test. The preparation of mineralized water with different concentrations used in this embodiment is as follows.

[0085] Industry standard water type: weigh 12.5g NaCl and 2.5g CaCl 2 Dissolve it in a clean small beaker, then pour it into a 250ml volumetric flask and make it into an aqueous solution with a salinity of 60g / L.

[0086] NaHCO 3 Water type: weigh 1.25g NaHCO 3 Dissolve it in a clean small beaker, then pour it into a 250ml volumetric flask and make it into an aqueous solution with a salinity of 5g / L.

[0087] CaCl 2 Water type: weigh 15g NaCl and 27.5g CaCl 2 Dissolve it in a clean small beaker, then pour it into a 250ml volumetric flask and make it into an aqueous solution...

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Abstract

The invention belongs to the technical field of oil-gas field gas extraction production and discloses a novel floatable solid foam scrubbing rod. The novel floatable solid foam scrubbing rod comprises, by mass, 40-60 parts of a foaming agent, 10-20 parts of a foam stabilizer, 10 parts of a filler, 5 parts of a solubilizer, 3 parts of a fluidizer and 2 parts of a lubrication release agent. The foaming agent adopts one or more of dodecyl oxethyl sulphobetaine, dodecyl hydroxypropyl sulphobetaine and dodecyl sulfopropyl betaine; the foam stabilizer adopts one or two of coconut oil monoethanolamide and dodecyl polyglucoside; the filler adopts thiourea; the solubilizer adopts water soluble solid salt; the fluidizer adopts polyvinyl alcohol; and the lubrication release agent adopts one or two of polyethylene glycol 6000 and sodium benzoate. The foam scrubbing rod is small than or equal to shaft liquid loading in density and can float on the shaft liquid loading, the influence of liquid loading on foaming is reduced, foam scrubbing performance is further improved, the foaming quantity is increased, and the liquid drainage effect is improved.

Description

technical field [0001] The invention belongs to the technical field of gas recovery production in oil and gas fields, and relates to a foam row rod for gas recovery, in particular to a novel floatable solid foam row rod and a preparation method thereof. The foam discharge rod of the present invention is especially suitable for water-flooded wells with low gas production. Background technique [0002] As the gas production of gas wells enters the middle and later stages, the pressure of gas reservoirs and the flow rate of natural gas gradually decrease, so that formation water or condensate cannot be carried out of the wellbore with the flow of natural gas, resulting in the advancement of edge water and the rise of bottom water. After a period of time, these liquids accumulate at the bottom of the well, and a liquid column is formed thereupon, seriously affecting the normal production of the gas well. If this situation continues, too much fluid will form in the wellbore, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C09K8/58C09K8/584
CPCC09K8/58C09K8/584C09K2208/34E21B43/16
Inventor 曾华张蕊玲马林张凯
Owner 陕西森瑞石油技术开发有限公司
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