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Foam drainage agent resistant to gas condensate and mineralization degree and preparation method thereof

A foam drainage agent, anti-condensation oil technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of reducing the foaming and stabilizing foam of the foam drainage agent, and the liquid carrying capacity of the foam.

Inactive Publication Date: 2015-09-09
NINGXIA ZHONGKE KANGYU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, condensate oil is a kind of defoamer, and its existence will reduce the foam stabilization and liquid-carrying ability of the foam discharge agent.

Method used

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  • Foam drainage agent resistant to gas condensate and mineralization degree and preparation method thereof
  • Foam drainage agent resistant to gas condensate and mineralization degree and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of foaming agent

[0020] The dosage of each raw material component in the foam drainage agent of this embodiment is as follows:

[0021] AES: 18%; saponin: 2%; betaine: 6%; polyacrylamide (molecular weight: 10 million): 0.04%; the balance is water.

[0022] The foam drainage agent of this embodiment is synthesized through the following steps:

[0023] (1) Add 50% of the total amount of water to the reactor, heat to 40°C, add polyacrylamide, stir for 0.5 to 1 hour, then add the remaining 50% water, and stir until uniform;

[0024] (2) Add fatty alcohol polyoxyethylene ether sodium sulfate, betaine, and saponins into the reaction kettle, and stir thoroughly for 1 to 2 hours; obtain a foam drainage agent (AZT-P) suitable for natural gas exploitation.

[0025] The properties of the prepared foaming agent are shown in Table 2.

Embodiment 2

[0027] Performance test of foaming agent

[0028] Laboratory preparation of mineralized water with 60g / L salinity: Weigh 10g of anhydrous calcium chloride (CaCl2) and 50g of sodium chloride (NaCl) in a beaker, dissolve and dilute with distilled water to a total volume of 1L. The total salinity is 60g / L (all reagents used are chemically pure).

[0029] Pipette 4mL finished product to prepare 1000mL test solution, and determine its carrying capacity:

[0030] (1) 5% oil (volume fraction): the liquid carrying capacity is 103mL;

[0031] (2) 30% oil + 20% methanol (volume fraction): the total amount of liquid carried is 98 mL (of which water and methanol are 58 mL).

[0032] Reference ratio 1

[0033] Pipette 4mL of industrial products to prepare 1000mL test solution (its salinity is 60g / L, containing 10g of anhydrous calcium chloride (CaCl2) and 50g of sodium chloride (NaCl)), and determine its carrying capacity:

[0034] (1) 5% oil (volume fraction): the liquid carrying capacity is 22mL;

...

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Abstract

On the basis of analysis of a composition and physicochemical conditions of an accumulated fluid of a natural gas well, based on a synergistic effect between an anionic surfactant and a nonionic surfactant, through compounding of the anionic surfactant and the nonionic surfactant, and with supplement of modification of a foam stabilizer and an amphoteric surfactant, a foam drainage agent which is strong in fluid-carrying capability and can meet drainage and gas exploitation of the natural gas well containing more gas condensate and having relatively high alkaline earth metal ion concentration in the well cylinder accumulated fluid is obtained. The foam drainage agent is applicable for drainage and gas exploitation of the natural gas well, and especially for drainage and gas exploitation of the natural gas well having high gas condensate content and high alkaline earth metal ion concentration.

Description

Technical field [0001] The invention relates to a chemical additive for the drainage and gas recovery of natural gas wells in the field of oil and gas field development, in particular to a situation where the condensate oil content in the formation is high, the salinity is high, and the calcium and magnesium ion content is high, and there is a large amount of methanol. Foam drainage agent for drainage and gas recovery. Background technique [0002] Foam drainage agent used in natural gas wells (hereinafter referred to as foam drainage agent) is a type of chemical additives that are mainly surfactants and supplemented by other chemical additives for the drainage and gas recovery of natural gas wells. The principle of foaming agent drainage and gas recovery is to use the foaming properties of surfactants, and with the agitation of gas well natural gas, the liquid accumulation of gas wells (including water, condensate oil, methanol and methanol added to inhibit the formation of natu...

Claims

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Application Information

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IPC IPC(8): C09K8/584
Inventor 王立国石国军李翠王永军何生龙周辉
Owner NINGXIA ZHONGKE KANGYU CHEM
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