CN101735782A - Method for preparing profile adjusting and water plugging agent from slurry obtained after treatment on waste water of oil fields - Google Patents

Abstract

The invention belongs to a method for preparing a profile adjusting and water plugging agent from slurry obtained after treatment on waste water of oil fields, comprising the following steps of: adding acrylamide and sodium acrylate monomers in waste polymer gel generated in the exploitation of oil fields for copolymerization crosslinking to synthesize a swelled oil field profile adjusting agent for adjusting the deep profile of a large-oil path oil deposit during the exploitation of the oil field. The obtained profile adjusting and water plugging agent for oil fields is applied to high-water content zones during the exploitation of oil fields and is a swelled oil field profile adjusting agent for adjusting the deep profile of the large-oil path oil deposit. The adsorption time of the product for NaCl saltwater with the weight concentration of 0.9% is 35 g/g to 60 g/g.

Description

Utilize oil field waste to handle the method for back mud for the feedstock production profile-controlling and plugging agent

Technical field

The present invention utilizes oil field waste to handle the method for back mud for the feedstock production profile-controlling and plugging agent.

Background technology

The oilfield waste gel be in oilfield exploitation is produced after treatment, the waste polymer gel of generation, this gel major ingredient are little crosslinked or crosslinked polyacrylamide gels bodies partly.Contain certain crude oil, metal ion and some mineral substance.Generally by treatment processs such as landfills, not only environmental pollution is very big, and the waste resource.Environment had both been protected in the how innoxious and comprehensive utilization of resources with waste, increased waste recycle again, more and more was subjected to people's attention.

Chinese patent CN1781860 " a kind of synthetic method of utilizing oil exploitation sludge to prepare volume expansion type granular profile control agent " has prepared a kind of granular profile control agent with the oil exploitation sludge of discarding landfill originally.The processing more complicated of this its mud of patent and cause dust pollution easily 2 times, the polymkeric substance synthesis condition has limited the additive capacity of greasy filth.

Chinese patent CN1085590 " a kind of water-pluging Polymer amendment " is characterized in that organosilane and yin, yang, non-ionic monomer form a kind of tridimensional network high molecular polymer in the aqueous solution, is the amendment of using always.

Chinese patent CN1796484 " a kind of preparation method of crosslinking copolymerization type particulate state amendment ", this method adopts acrylamide and two kinds of organic monomers of vinylformic acid as host, prepares crosslinking copolymerization type particulate state amendment to add wilkinite or kaolin as toughener.

The raw material that present preparation profile-controlling and plugging agent uses is organic or inorganic industrial chemicals, cost height.

Summary of the invention

The invention provides the present invention is to utilize oil field waste to handle the method for back mud for the feedstock production profile-controlling and plugging agent.Main purpose is that the waste resource in recovering the oil is carried out harmless treatment, avoids the landfill of refuse and discardedly causes environmental pollution, reaches that waste resource is innoxious, the making full use of of resource utilization.

The oil field waste processing back mud that utilizes provided by the invention is as follows for the step and the condition of the method for feedstock production profile-controlling and plugging agent:

Handle the sodium acrylate monomers aqueous solution that adds the weight percent concentration 8-30% acrylamide monomer aqueous solution and weight percent concentration 5-25% in the mud of back at the water and milk shape oil field waste of weight percent concentration 5-50%, stir, fill the nitrogen exhaust, the initiator and the monomer total mass 0.01-0.1% linking agent that add monomer total mass 0.01-0.1%, at 45-65 ℃ of following water-bath 4-8 hour, free radical causes copolymerzation with cross-linking, obtain gum polymers, after the oven dry granulation, obtain utilizing oil field waste to handle back mud and be the feedstock production profile-controlling and plugging agent;

Described acrylamide monomer: the sodium acrylate monomers molar percentage is 60-90%:40-10%; The weight concentration that described oil field waste in the reaction system is handled back mud is 10-30%, and the total concentration by weight of acrylamide monomer and sodium acrylate monomers is 30-50% in the reaction system, and described water is deionized water;

Described initiator is Potassium Persulphate, ammonium persulphate, S-WAT or sodium bisulfite;

Described linking agent is Tiorco 677 or N, N-methyne bisacrylamide.

Beneficial effect: product can be applicable to the high water leg in the oilfield exploitation, the volume expansion type oil field profile control that macropore oil deposit deep part section is adjusted.It is 35g/g to 60g/g that product is inhaled weight concentration 0.9%NaCl salt solution multiple.

Embodiment

Embodiment 1: add weight percent concentration 25% sodium acrylate aqueous solution 55g in weight percent concentration 30% acrylamide solution 45g, stir, adding weight percent concentration 50% utilizes oil field waste to handle back mud 50g, add initiator potassium persulfate 0.005g and sodium bisulfite 0.003g after the inflated with nitrogen deoxygenation, linking agent Tiorco 677 0.02g, the 45 ℃ of synthesis under normal pressure that stir to heat up aggregated into offset plate in 8 hours, carried out fragmentation, oven dry, pulverizing and obtained product.Product is inhaled weight concentration 0.9%NaCl salt solution multiple 60g/g.

Embodiment 2: add 5% sodium acrylate aqueous solution 55g and stir in the 8% acrylamide 75g aqueous solution, add initiator ammonium persulfate 0.0008g and S-WAT 0.0002g after adding 35% waste polymer gel 75g inflated with nitrogen deoxygenation, linking agent N, the N-methyne bisacrylamide 0.0001g 55 ℃ of synthesis under normal pressure that stir to heat up aggregated into offset plate in 8 hours, carried out fragmentation, oven dry, pulverizing and obtained product.Product is inhaled weight concentration 0.9%NaCl salt solution multiple: 80g/g.

Embodiment 3: add 20% sodium acrylate aqueous solution 55g and stir in the 20% acrylamide 45g aqueous solution, add 20% waste polymer gel 100g, add initiator potassium persulfate 0.0026g and sodium bisulfite 0.0017g after the inflated with nitrogen deoxygenation, the linking agent Tiorco 677 0.007g 60 ℃ of synthesis under normal pressure that stir to heat up aggregated into offset plate in 8 hours, carried out fragmentation, oven dry, pulverizing and obtained product.Product is inhaled weight concentration 0.9%NaCl salt solution times 50g/g.

Embodiment 4: add 15% sodium acrylate aqueous solution 55g and stir in the 10% acrylamide 45g aqueous solution, add 50% waste polymer gel 50g, add initiator Ammonium Persulfate 98.5 0.0016g and S-WAT 0.0008g after the inflated with nitrogen deoxygenation, linking agent N, the N-methylene-bisacrylamide 0.004g 65 ℃ of synthesis under normal pressure that stir to heat up aggregated into offset plate in 8 hours, carried out fragmentation, oven dry, pulverizing and obtained product.Product is inhaled weight concentration 0.9%NaCl salt solution multiple: 35g/g.

Claims (1)

1. one kind is utilized oil field waste to handle the method for back mud for the feedstock production profile-controlling and plugging agent, it is characterized in that, handle the sodium acrylate monomers aqueous solution that adds the weight percent concentration 8-30% acrylamide monomer aqueous solution and weight percent concentration 5-25% in the mud of back at the water and milk shape oil field waste of weight percent concentration 5-50%, stir, fill the nitrogen exhaust, the initiator and the monomer total mass 0.01-0.1% linking agent that add monomer total mass 0.01-0.1%, at 45-65 ℃ of following water-bath 4-8 hour, free radical causes copolymerzation with cross-linking, obtain gum polymers, after the oven dry granulation, obtain utilizing oil field waste to handle back mud and be the feedstock production profile-controlling and plugging agent;

Described acrylamide monomer: the sodium acrylate monomers molar percentage is 60-90%: 40-10%; The weight concentration that described oil field waste in the reaction system is handled back mud is 10-30%, and the total concentration by weight of acrylamide monomer and sodium acrylate monomers is 30-50% in the reaction system, and described water is deionized water;

Described initiator is Potassium Persulphate, ammonium persulphate, S-WAT or sodium bisulfite;

Described linking agent is Tiorco 677 or N, N-methyne bisacrylamide.