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Online continuous production and injection integrating method and device for jelly dispersoid

A jelly dispersion and jelly technology, which are applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problem of inability to achieve deep profile control or flood control, continuous online injection, and continuous large-scale construction. Difficulties and other problems, to achieve the effect of shortening production time, practical and convenient, and good liquidity

Active Publication Date: 2014-02-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, during the implementation of profile control (displacement) technology, the method of preparing profile control (displacement) agent on site and pumping the profile control (displacement) agent directly into the water injection well at the head of the water injection well is mostly used. This injection method exists The following deficiencies: (1) Injection cannot be done online, it is necessary to stop injecting water into the injection well, inject profile control (displacement) agent from the wellhead, and then open the well for water injection, or perform slug injection, that is, inject a section of profile control (displacement) agent , inject a section of water, then inject a section of profile control (displacement control) agent, and then inject water. Repeatedly, this will lead to a large amount of construction, and the pressure of the water injection well will rise too fast, and the purpose of deep profile control or flood control cannot be achieved.
(2) The concentration is not easy to control during the injection process, and it is easy to cause blockage near the wellbore of the injection well, which affects the effect of profile control and flooding (3) The above injection method is only suitable for single well injection, and continuous online injection cannot be realized for blocks or multi-well groups
[0004] However, the above-mentioned online injection device only considers how to prepare the profile control (displacement) agent system stored on the construction site to realize the online injection of the profile control (displacement) agent, and fails to fully consider the multi-well group or block size. The need for continuous profile control (displacement control) by dose, especially not suitable for profile control (displacement control) agents that are difficult to transport or not easy to store for a long time, which brings certain difficulties to long-term continuous large-scale construction on site

Method used

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  • Online continuous production and injection integrating method and device for jelly dispersoid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An integrated device for continuous on-line production and injection of jelly dispersion, the structure is figure 1 Shown, comprise high-pressure plunger pump 23, curing tank 4, cross-linking agent storage tank 9, jelly reaction tank 8, colloid mill 16 and buffer tank 19, high-pressure plunger pump 23 is connected with water injection pipeline 25 by pipeline, ripening The liquid inlet of tank 4 is connected with water injection pipeline 25, and the liquid outlet of ripening tank 4 is connected with the liquid inlet of jelly reaction tank 8, and the liquid inlet of jelly reaction tank 8 is also connected with crosslinking agent storage tank 9, The liquid outlet of the jelly reaction tank 8 is connected with the feeding port of the colloid mill 16 by the rotor pump 13, the water inlet of the colloid mill 16 is connected with the water injection pipeline 25 by the water delivery pipeline 17, and the discharge port of the colloid mill 16 is connected with the buffer The li...

Embodiment 2

[0043] Utilize the device described in embodiment 1 to carry out the method for jelly dispersion continuous on-line production and injection, may further comprise the steps:

[0044] 1. Choose a molecular weight of 9.6×10 6 1. Add non-ionic polyacrylamide with a degree of hydrolysis of 3.6% into the aging tank 4, add water and stir for aging, and prepare a non-ionic polyacrylamide solution with a mass fraction of 0.6%;

[0045] 2. The non-ionic polyacrylamide solution with a mass fraction of 0.6% prepared in step 1 is transported to the jelly reaction tank 8 through the metering pump 6. Deliver zirconium acetate solution in jelly reaction tank 8, the flow rate of metering pump 10 is 32 liters / hour; The mass ratio of metering pump control nonionic polyacrylamide solution and zirconium acetate solution is 62.5: 1, the jelly reaction tank 8. Stir the non-ionic polyacrylamide solution and the zirconium acetate solution for 10 minutes to prepare the jelly system;

[0046] 3. The ...

Embodiment 3

[0050] Utilize the device described in embodiment 1 as described in embodiment 2 to carry out the method for continuous on-line production and injection of jelly dispersion, the difference is:

[0051] Step 2, the metering pump controls the mass ratio of the nonionic polyacrylamide solution to the zirconium acetate solution to be 60:1, and stirs the nonionic polyacrylamide solution and the zirconium acetate solution in the jelly reaction tank 8 for 8 minutes to prepare the jelly system;

[0052] Step 3, the rotor pump 13 sucks the jelly system in the jelly reaction tank 8 into the colloid mill 16 through the flow meter 15, and at the same time, the water delivery pipeline 17 injects water into the colloid mill 16 through the flow meter 2, and the flow meter controls The mass ratio of the jelly system to water is 1:3, adjust the rotation speed of the colloid mill 16 to 1000 rpm, and grind for 3 minutes to obtain a jelly dispersion.

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Abstract

The invention relates to an online continuous production and injection integrating method and device for a jelly dispersoid. The method comprises the following steps of: curing a polymer and preparing a jelly system; then, pumping the prepared jelly system into a colloid grinder through a flow meter, meanwhile, injecting water into the colloid grinder, and grinding by using the colloid grinder at the rotating speed of 1000-3000rpm for 3-5 minutes to prepare the jelly dispersoid; enabling the prepared jelly dispersoid to enter a buffer tank; and pumping the jelly dispersoid in the buffer tank into a water injection well through a high-pressure plunger pump. Production and injection integration of a profile control agent (profiling / flooding agent) is realized, the jelly system and the jelly dispersoid are prepared simultaneously while the jelly dispersoid is pumped into the water injection well, the production and the injection of the jelly dispersoid are continuously carried out on line, and production and injection are simultaneously carried out, so that the production and injection time of the jelly dispersoid is greatly shortened, and the large-dosage continuous profiling and flooding requirements of multiple well groups or blocks can be met.

Description

technical field [0001] The invention relates to an online production and injection method and an integrated device of a profile control (displacement) agent for a water injection well, in particular to an integrated method and device for continuous on-line production and injection of a jelly dispersion. Background technique [0002] Waterflood development is the main method of oilfield exploitation in my country, but the long-term waterflood development of oilfields leads to the intensification of stratum heterogeneity, which accelerates the rise of water cut in the middle and late stages of oilfield development, and water flooding is inefficient or ineffective in circulation. Profile control (modulation and flooding) technology is currently an effective means to improve formation heterogeneity and achieve stable and increased production in oilfields. Profile control (displacement control) technology is to inject profile control (displacement control) agent into water inject...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/20E21B43/22
Inventor 戴彩丽赵光由庆赵明伟汪卫东赵健慧杨帅
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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