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Microbial self-healing gel profile control agent and preparation method and application thereof

A microbial and self-healing technology, applied in chemical instruments and methods, drilling compositions, fixed on/in organic carriers, etc., can solve the problems of reducing the plugging strength of gel particles and the turning effect, etc. The effect of improving water flooding efficiency and enhancing oil recovery

Active Publication Date: 2016-06-15
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a method for preparing a microbial self-repairing gel profile control agent, which can endow the gel profile control agent with the ability of microbial self-repairing, thereby solving the existing high During the particle injection and deep migration of water-absorbing body swelling particles and polymer microgel particle profile control and flooding agents in water-bearing oilfields, the plugging strength of gel particles is reduced due to the phenomenon of gel particle shearing or tearing. The problem with steering effect

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  • Microbial self-healing gel profile control agent and preparation method and application thereof
  • Microbial self-healing gel profile control agent and preparation method and application thereof
  • Microbial self-healing gel profile control agent and preparation method and application thereof

Examples

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Embodiment 1

[0053] This embodiment provides a preparation method of microbial self-repairing gel profile control agent, the process of which is as follows figure 1 shown.

[0054] The preparation method of the microbial self-repairing gel profile control agent comprises the following steps:

[0055] (1) Accurately measure 20mL of distilled water, add 0.06g of nutrient broth, 0.4g of urea, and 0.2g of ammonium chloride into it, stir well until completely dissolved, and this is the microbial nutrient concentrate;

[0056] (2) Place the bacillus sarcina (ATCC11859) that has been cultivated for 12 hours in a high-speed centrifuge, and centrifuge for 15 minutes at a speed of 7000rpm. After the centrifugation, the supernatant is poured out to obtain the purified bacillus Streptococcus sediment; Then use the above-mentioned 20mL microbial nutrient concentrate solution to suspend the sediment to obtain a sarcinina suspension, and the OD600 of the sarcinina suspension is 2;

[0057] (3) Accurate...

Embodiment 2

[0066] This embodiment provides a preparation method of microbial self-repairing gel profile control agent, the process of which is as follows figure 1 shown.

[0067] The preparation method of the microbial self-repairing gel profile control agent comprises the following steps:

[0068] (1) Accurately measure 20mL of distilled water, add 0.06g of nutrient broth, 0.4g of urea, and 0.2g of ammonium chloride into it, stir well until completely dissolved, and this is the microbial nutrient concentrate;

[0069] (2) Place the Bacillus sarcinina that has been cultivated for 12 hours in a high-speed centrifuge, and centrifuge at a speed of 7000rpm for 15 minutes. After the centrifugation, pour off the supernatant to obtain the purified Bacillus sarcinica deposition Thing; Then use the 20mL microbial nutrient concentrate prepared above to suspend the sediment to obtain a suspension of Sarcina sarcini, and the OD600 of the suspension of Sarcina sarcinii is measured to be 2;

[0070]...

Embodiment 3

[0077] This example provides a method for preparing a microbial self-repairing gel profile control agent.

[0078] The preparation method of the microbial self-repairing gel profile control agent comprises the following steps:

[0079] (1) Accurately measure 20mL of distilled water, add 0.06g of nutrient broth, 0.4g of urea, and 0.2g of ammonium chloride into it, stir well until completely dissolved, and this is the microbial nutrient concentrate;

[0080] (2) Place the bacillus sarcina (ATCC11859) that has been cultivated for 12 hours in a high-speed centrifuge, and centrifuge for 15 minutes at a speed of 7000rpm. After the centrifugation, the supernatant is poured out to obtain the purified bacillus Streptococcus sediment; Then use the above-mentioned 20mL microbial nutrient concentrate solution to suspend the sediment to obtain a sarcinina suspension, and the OD600 of the sarcinina suspension is 2;

[0081] (3) Accurately weigh 0.4g of sodium alginate, 1g of acrylamide, 0....

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Abstract

The invention provides a preparation method of a microbial self-healing gel profile control agent.The preparation method includes the following steps that a microbial nutrition concentrated solution is prepared, then the solution is mixed with microorganisms, and microbial suspension liquid is formed; 2-3% of sodium alga acid, 4-6% of acrylamide, 0.1-0.3% of N' N-methylene bisacrylamide and 0.5-0.6% of N, N, N', N'-tetramethylethylenediamine are added to the microbial suspension liquid, and first reaction liquid is formed; 2-4% of a cross-linking agent, 0.2-0.25% of initiator and water are mixed, and second reaction liquid is formed; the first reaction liquid is mixed with the second reaction liquid, a reaction is conducted for 2-3 hours at the normal temperature of 20-25 DEG C, washing is conducted, and the microbial self-healing gel profile control agent is obtained; the optical density of the microbial suspension liquid at the position of 600 nm is 1.5-2.The invention further provides the microbial self-healing gel profile control agent prepared through the preparation method and application of the same to oil exploitation.

Description

technical field [0001] The invention belongs to the field of petroleum exploitation, and relates to a microbial self-repairing gel profile control agent and a preparation method and application thereof. Background technique [0002] More than 80% of my country's water flooding development oilfields have entered the high water cut production period with a water cut greater than 80%. The low efficiency or ineffective circulation of water flooding is the main contradiction in the development of high water cut oilfields. The main work. Ground pre-cross-linked gel particles and microbial plugging agents are widely used in high water-cut oilfields to block the dominant channel of water flow, control the water flow to divert the remaining oil in medium-low permeability storage, and improve water flooding efficiency. At present, there are two main types of ground pre-crosslinked gel particles widely used at home and abroad. One is water-absorbing body-swelling particles, and the gro...

Claims

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Application Information

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IPC IPC(8): C12N11/10C12N11/08C12N11/04C09K8/512C09K8/582
CPCC09K8/512C09K8/582C12N11/04C12N11/08C12N11/10
Inventor 刘合唐孝芬熊春明江如意魏发林曾致翚杨立明邵黎明
Owner PETROCHINA CO LTD
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