High-temperature-resistant salt-resistant anti-sloughing filtrate reducer and preparation method thereof

Abstract

The invention relates to the technical field of filtrate reducers, in particular to a high-temperature-resistant salt-resistant anti-sloughing filtrate reducer and a preparation method thereof. The high-temperature-resistant salt-resistant anti-sloughing filtrate reducer is prepared by polymerizing lignin degradation liquid, maleic anhydride, sodium p-styrenesulfonate and dimethyl diallyl ammonium chloride under the action of an initiator and a cross-linking agent. The lignin degraded by the immobilized feruloyl esterase is small in molecular quantity, increased in active sites and prone to reaction with other monomers; and a compound obtained by polymerization is good in dissolving property, has good compatibility with other drilling fluid additives, and is outstanding in high temperature resistance, salt resistance and collapse resistance.

Description

technical field

[0001] The invention belongs to the technical field of fluid loss control agents, and in particular relates to a high-temperature, salt-resistant, anti-collapse fluid loss control agent and a preparation method thereof. Background technique

[0002] Fluid loss reducer is an additive that can ensure the stability of drilling fluid performance, reduce the loss of harmful liquid to geological formations, improve the stability of the well wall and ensure the regular diameter of oil wells. The use of fluid loss reducer can effectively ensure the safe production of oil fields. With the continuous increase of mining volume and the continuous improvement of exploration technology, more and more deep wells and ultra-deep wells appear, which put forward more and more requirements for drilling fluid and various additives used in drilling fluid, such as fluid loss control agent. High requirements, such as continuous high temperature resistance and salt resistance. And ...

Examples

Embodiment 1

[0042] An anti-high temperature, anti-salt, anti-slump, and anti-slump fluid loss reducing agent is composed of the following raw materials: 6 parts by weight of lignin degradation liquid, 15 parts by weight of maleic anhydride, 9 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride 6 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.1 parts by weight of benzoyl peroxide (BPO), 0.02 parts by weight of dicumyl peroxide (DCP), and 0.06 parts by weight of potassium persulfate are prepared by chemical reaction.

[0043] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0044] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 700 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 8, Obtain ...

Embodiment 2

[0051] An anti-high temperature, anti-salt, anti-slump and fluid loss reducing agent is composed of the following raw materials: 5 parts by weight of lignin degradation liquid, 12 parts by weight of maleic anhydride, 7 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride It is prepared by chemical reaction of 5 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.04 parts by weight of benzoyl peroxide (BPO), 0.01 parts by weight of dicumyl peroxide (DCP), and 0.05 parts by weight of potassium persulfate.

[0052] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0053] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 600 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 8, Obtain mixtur...

Embodiment 3

[0060] An anti-high temperature, anti-salt, anti-slump, and anti-slump fluid loss reducing agent is composed of the following raw materials: 8 parts by weight of lignin degradation liquid, 18 parts by weight of maleic anhydride, 13 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride 10 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.17 parts by weight of benzoyl peroxide (BPO), 0.03 parts by weight of dicumyl peroxide (DCP), and 0.07 parts by weight of potassium persulfate are prepared by chemical reaction.

[0061] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0062] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 800 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 9, Obta...

technical field

[0001] The invention belongs to the technical field of fluid loss control agents, and in particular relates to a high-temperature, salt-resistant, anti-collapse fluid loss control agent and a preparation method thereof. Background technique

[0002] Fluid loss reducer is an additive that can ensure the stability of drilling fluid performance, reduce the loss of harmful liquid to geological formations, improve the stability of the well wall and ensure the regular diameter of oil wells. The use of fluid loss reducer can effectively ensure the safe production of oil fields. With the continuous increase of mining volume and the continuous improvement of exploration technology, more and more deep wells and ultra-deep wells appear, which put forward more and more requirements for drilling fluid and various additives used in drilling fluid, such as fluid loss control agent. High requirements, such as continuous high temperature resistance and salt resistance. And ...

Examples

Embodiment 1

[0042] An anti-high temperature, anti-salt, anti-slump, and anti-slump fluid loss reducing agent is composed of the following raw materials: 6 parts by weight of lignin degradation liquid, 15 parts by weight of maleic anhydride, 9 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride 6 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.1 parts by weight of benzoyl peroxide (BPO), 0.02 parts by weight of dicumyl peroxide (DCP), and 0.06 parts by weight of potassium persulfate are prepared by chemical reaction.

[0043] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0044] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 700 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 8, Obtain ...

Embodiment 2

[0051] An anti-high temperature, anti-salt, anti-slump and fluid loss reducing agent is composed of the following raw materials: 5 parts by weight of lignin degradation liquid, 12 parts by weight of maleic anhydride, 7 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride It is prepared by chemical reaction of 5 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.04 parts by weight of benzoyl peroxide (BPO), 0.01 parts by weight of dicumyl peroxide (DCP), and 0.05 parts by weight of potassium persulfate.

[0052] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0053] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 600 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 8, Obtain mixtur...

Embodiment 3

[0060] An anti-high temperature, anti-salt, anti-slump, and anti-slump fluid loss reducing agent is composed of the following raw materials: 8 parts by weight of lignin degradation liquid, 18 parts by weight of maleic anhydride, 13 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride 10 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.17 parts by weight of benzoyl peroxide (BPO), 0.03 parts by weight of dicumyl peroxide (DCP), and 0.07 parts by weight of potassium persulfate are prepared by chemical reaction.

[0061] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0062] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 800 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 9, Obta...

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