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Method for preparing oil extraction production promoter

The technology of a production stimulation agent and an accelerator is applied in the field of preparation of oil production stimulation agent, which can solve the problems of polymer flooding restriction, slow dissolution rate, polymer loss, etc., and achieves improvement of wet state, enhanced oil recovery, and increased crude oil production. Effect

Inactive Publication Date: 2008-08-27
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

For example, polymer flooding has slow dissolution rate, shear degradation, thermal degradation, oxidative degradation and high salinity formation water, which will cause loss of polymer.
In addition, during the process of polymer flooding, due to various factors, it has been found that polymers produce new plugs in formations near the wellbore, etc.
Therefore, the use of polymer flooding in large areas is restricted to varying degrees.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] (1) With the structural formula as The liquid accelerator CH 2 SO 2 ·H 2 O and the structural formula is slow release agent C 4 h 10 NO as raw material;

[0013] (2) The above-mentioned liquid accelerator and slow-release agent are based on a weight ratio of 2:1, and are mixed and prepared under natural conditions. After 10 minutes of mixing, the ingredients are mutually soluble, and they are placed for 20 minutes. Under the premise of ensuring that there is no precipitation , adding 1.2% of the total weight of the liquid accelerator agent and the slow release agent, the structural formula is liquid curing agent C 6 h 8 o 7 ·H 2 O, kept for 15 minutes to prepare the oil recovery stimulation agent.

[0014] According to the obtained water flooding efficiency test results, it is shown that the water-free recovery rate is increased by 6% and the ultimate recovery rate is increased by about 10% by adding the oil recovery booster to the injected water.

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PUM

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Abstract

The invention discloses a method for preparing oil recovery production promoter, which comprises the following steps: firstly, utilizing liquid-state accelerating agent CH2SO2.H2O and slow releasing agent C4H10NO to be raw material, secondly, the above liquid-state accelerating agent and releasing agent take the weight ratio which is 2:1 as reference, mixing preparation under natural condition, mixing for 10 minutes, leading components to be miscible, placing for 20 minutes, adding liquid-state accelerating agent and liquid curing agent C6H8O7.H2O which is 1-1.5% of the total amount of slow releasing agent under the premise without precipitate, keeping for 15 minutes, and preparing oil recovery production promoter. The oil recovery production promoter which is prepared by the invention is beneficial for improving moist status of base oil storage layer rocks and physical indexes of oil wells, which plays the function of increasing base oil output and improving recovery efficiency.

Description

technical field [0001] The invention relates to a preparation method of an oil production increasing agent. Background technique [0002] Polymer flooding has been used successively by major oilfields in my country, and has achieved remarkable results in enhancing oil recovery. At present, the commonly used methods include HPAM (partial water polyacrylamide), XG (xanthan gum), alkali flooding, surfactant flooding, compound flooding, etc. With the application of various methods and the expansion of fields, the accompanying problems are constantly exposed. For example, polymer flooding has slow dissolution rate, shear degradation, thermal degradation, oxidative degradation and high salinity formation water, which will cause loss of polymer. In addition, in the process of polymer flooding, due to various factors, it has been found that polymers produce new plugs in formations near the wellbore and other problems. Therefore, the use of polymer flooding in large areas is restr...

Claims

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Application Information

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IPC IPC(8): C09K8/60
Inventor 陈南春钟夏平
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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