A kind of preparation method of biological glue for fracturing

A bio-glue and fracturing technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor salt resistance, high construction friction, high gel-breaking residue, etc., achieve good temperature resistance, construction friction Low resistance and good sand-carrying performance

Active Publication Date: 2021-03-26
广饶源润新材料有限公司 +1
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AI Technical Summary

Problems solved by technology

[0009] However, guar gum fracturing fluid also has obvious disadvantages: more types of additives are required in the preparation process, high gel-breaking residue, easy to be corrupted and deteriorated, high construction friction, and difficulties in large-displacement operations
However, the construction friction is still high, and many additives are required in the preparation process. The salt resistance is poor, and it is not suitable for the reuse of gel-breaking flowback fluid.
[0012] Hydrophobic high-molecular polymer fracturing fluid requires few additives in the preparation process, but its sand-carrying performance is poor, and it swells slowly in brine, so it is not suitable for the reuse of gel-breaking flowback fluid
[0013] Hydrophobic surfactants require fewer additives in the preparation process of fracturing fluids, swell quickly in brine, and are suitable for reuse of gel-breaking flowback fluids; but they are expensive, have poor temperature resistance, and limited use conditions
[0014] Xanthan gum-based polymer bio-glue has good salt resistance, and the prepared fracturing fluid has low friction, but poor sand-carrying property and temperature resistance

Method used

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  • A kind of preparation method of biological glue for fracturing
  • A kind of preparation method of biological glue for fracturing

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preparation example Construction

[0039] A kind of preparation method of bioglue for fracturing comprises following realization steps (see figure 1 ):

[0040] Step 1: preparation of the water phase, the proportion of which is: 40-88 parts of water, 2-10 parts of polyoxyethylene succinic monoester sodium rosin acid, and 10-50 parts of acrylamide;

[0041] Described water is pure water, demineralized water.

[0042] The sodium abietic acid polyoxyethylene succinic acid monoester sulfonate is a biosurfactant prepared from natural rosin, which is widely used in washing and cosmetic industries, and the commercially available purity is greater than 95%. Its molecular structural formula is:

[0043] RCOO (CH 2 CH 2 O) n OCCH=CHCO(OCH 2 CH 2 ) n OOCR

[0044] Wherein: n=5-20; R is rosin skeleton, namely

[0045] According to the above proportion, add sodium polyoxyethylene succinic acid monoester sulfonate and acrylamide successively into water, stir until completely dissolved, and then mix evenly to form...

Embodiment 1

[0063] Add 50 parts of water into container A with agitator, start the agitator, then add 8 parts of abietic acid polyoxyethylene succinic acid monoester sodium sulfonate and 42 parts of acrylamide respectively, stir until completely dissolved, and prepare an aqueous phase.

[0064] Add 95 parts of white oil and 80 5 parts of Span into container B with agitator, stir for more than 15 minutes until the mixture is uniform, and prepare the oil phase.

[0065] In the container C with agitator, first add 50 parts of the above-prepared oil phase, start the agitator, then add 50 parts of the above-prepared water phase at a uniform speed, and continue stirring for 30 minutes to form an emulsion.

[0066] Start the agitator of reactor D, and when container C continues to stir, use the homogeneous emulsification pump to pump the emulsion into reactor D; The pump is pumped to container C; after the addition, the emulsion in container C is pumped to reactor D by a homogeneous emulsificati...

Embodiment 2

[0069] Add 60 parts of water into container A with agitator, start the agitator, then add 5 parts of abietic acid polyoxyethylene succinic acid monoester sodium sulfonate and 40 parts of acrylamide respectively, stir until completely dissolved, and prepare an aqueous phase.

[0070] Add 96 parts of white oil and 4 parts of Span 80 into container B with a stirrer, stir for more than 15 minutes until the mixture is even, and prepare an oil phase.

[0071] In container C with a stirrer, first add 60 parts of the above-prepared oil phase, start the agitator, then add 40 parts of the above-prepared water phase at a constant speed, and continue stirring for 30 minutes after the addition is complete to form an emulsion.

[0072] Start the agitator of reactor D, and when container C continues to stir, use the homogeneous emulsification pump to pump the emulsion into reactor D; The pump is pumped to container C; after the addition, the emulsion in container C is pumped to reactor D by ...

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Abstract

The invention discloses a preparation method for biological glue for fracturing. The method is realized through the following steps: step 1: preparing a water phase from the following components in parts by weight: 40 to 88 parts of water, 2 to 10 parts of rosin-based polyoxyethylene sodium sulfosuccinate monoester and 10 to 50 parts of acrylamide; step 2: preparing an oil phase from the followingcomponents in parts by weight: 90 to 99 parts of white oil and 1 to 10 parts of Span 80; step 3: preparing emulsion from the following components in parts by weight: 30 to 60 parts of the water phaseprepared by the step 1 and 40 to 70 parts of the oil phase prepared by the step 2; under a stirring state, slowly adding the water phase into the oil phase; after adding the water phase, performing circular emulsifying for 1 to 3 times by utilizing a homogenization emulsifying pump; step 4: carrying out a polymerization reaction: adding the emulsion prepared by the step 3 into a reaction kettle with a stirrer; performing stirring and introducing nitrogen gas for 10 minutes or more; adding 0.005 to 0.1 part of an oxidant and raising the temperature to be 35 to 45 DEG C; then slowly dropwise adding 0.005 to 0.1 part of a reducing agent and completing the adding after 2 to 5 hours; and after completing the adding of the reducing agent, preserving heat at 35 to 45 DEG C for 1 hour, so as to prepare the biological glue.

Description

[0001] 1. Technical field: [0002] The invention belongs to the technical field of fracturing fluid for hydraulic fracturing of oil and gas wells, and in particular relates to a preparation method of biological glue for fracturing. [0003] 2. Background technology: [0004] Hydraulic fracturing of oil and gas wells is to use surface high-pressure pumps to inject fracturing fluid containing chemical agents into the well at a displacement that greatly exceeds the absorption capacity of the formation, and then suffocate high pressure near the bottom of the well. When this pressure exceeds the ground stress near the borehole wall and the tensile strength of the rock, fractures are formed in the formation. If there are proppants such as quartz sand and ceramsite in the liquid, after the pump is stopped, the liquid will return to the ground under the pressure of the formation pressure, while the proppant will stay in the formation and form in the formation with sufficient length, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C08F220/56C08F222/10C08F2/32
CPCC08F2/32C08F220/56C09K8/68C09K8/882C09K8/90C08F222/1063
Inventor 沈峰张杰
Owner 广饶源润新材料有限公司
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