CN101690937B - Process technology for treating drilling waste while drilling before falling onto ground in oil-gas fields - Google Patents
Process technology for treating drilling waste while drilling before falling onto ground in oil-gas fields Download PDFInfo
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- CN101690937B CN101690937B CN2008100496730A CN200810049673A CN101690937B CN 101690937 B CN101690937 B CN 101690937B CN 2008100496730 A CN2008100496730 A CN 2008100496730A CN 200810049673 A CN200810049673 A CN 200810049673A CN 101690937 B CN101690937 B CN 101690937B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses process technology for treating drilling waste while drilling before falling onto ground in oil-gas fields, which is the technology for treating the drilling waste and overcomes defects of other technology. Based on principles of solid-liquid separation, classification treatment and comprehensive utilization, the process technology comprises the steps of: separation and cleaning of rock debris, destabilization and solid-liquid separation of slurry, and destabilization, flocculation, air flotation and sedimentation, oxidation, filtration and absorption and reverse osmosis treatment of filtrate water, so that the rock debris separated in the treatment on the drilling waste can be taken as concrete aggregate for utilization after being cleaned; mud cakes obtained after the solid-liquid separation can be mixed with clay or shale powder in proportion for making bricks; the separated filtrate water can be used for refilling and recharging safe formations after being pre-treated to reach standards or be discharged after reaching the standards; salts in sewage can be removed after advanced treatment, such as hyperfiltration or reverse osmosis and the like, so that the sewage meets the quality standards of farm irrigation water; and concentrated water generated after the advanced treatment can be used for preparing industrial salts after being heated, evaporated, concentrated and crystallized.
Description
One, technical field:
The present invention relates to a kind of treatment technology of drilling wastes, in particular for the technology of drilling waste while drilling before falling onto ground in oil-gas fields processing.
Two, background technology:
The oilfield drilling discarded object is the mixture of drilling waste water, drilling mud and landwaste, it is a kind of colloidal suspension system of quite stable, contain clay, weighting material, various chemical treatments, sewage, sump oil and drilling cuttings etc., environmentally hazardous main chemical compositions has modifiers such as foreign material in hydro carbons, salt, each base polymer, heavy metal ion, the barite and pitch, these pollutants have characteristics such as high chroma, high petroleum-type, high COD, high suspended matter, high salinity, are the major pollutants that produce in the petroleum exploration and development process.The every brill of oil gas field finishes a bite well, all will lose next discarded mud pit in the original place.An oil gas field has thousands of mouthfuls of wells, and thousands of discarded slurry ponds are just arranged, and the drilling wastes in each mud pit has hundreds of side at least, and several thousand sides are arranged at most.These discarded objects in case washed away by rainwater immersion, river, will cause very serious pollution as if stacking in the well site or burying to soil, water source, farmland and air on every side.Not landing with boring processing and comprehensive utilization to drilling wastes is the only way that the radical cure drilling wastes pollutes.
Before this, most of oil gas field has all adopted the method for solidifying landfill that drilling wastes is handled.In fact, solidification method is exactly to add a large amount of curing agent (account for discarded object total amount about 1/3) in drilling wastes, makes moisture wherein be adsorbed the back emergency burial.The curing agent that is added mainly contains: flyash, lime, cement, waterglass etc.This has just increased the total amount of discarded object and the cost of comprehensive utilization widely.More seriously, bury the pollution that afterwards leachate of discarded object still can be serious to underground water generates.
Three, summary of the invention:
The purpose of this invention is to provide Separation of Solid and Liquid, classification is handled, the technology that is used for the drilling waste while drilling before falling onto ground in oil-gas fields processing of comprehensive utilization, it has overcome that other technology exists landing the shortcoming that the back unicity handles, the present invention is that mud pit pollutes and the minimizing occupation of land is purpose for drilling well is finally eliminated, it can carry out the drilling wastes that returns out from well head handling with boring before landing, also the processing of classifying again after the dilution of the discarded slurry in the discarded slurry pond can be realized innoxious comprehensive utilization.Integrated artistic can accomplish that can be used as aggregate after isolated landwaste is cleaned totally from drilling wastes is used; The slime water that produces of bringing bottoms up forms mud cake through dosing, after taking off steady, flocculation, Separation of Solid and Liquid, can admix in proportion with clay or shale powder to be used for baking bricks; Pretreating process such as separated filtrate water is steady through taking off, flocculation, air supporting, oxidation and adsorption filtration are removed major pollutants, can be used for the oil field re-injection, recharge safe formation or qualified discharge; After the advanced treating of sewage through methods such as ultrafiltration, reverse osmosis deaslinations, can reach agricultural irrigation water quality standard.The useless brill of drilling well thing does not land and with boring the technical process of handling is:
1, the drilling wastes landwaste separate to clean, mud takes off surely, Separation of Solid and Liquid and mud cake utilization.Send on the first module-vibratory sieve sand-washing device of the landwaste separation cleaning device of forming by three unit by a cover screw conveyor by the discarded object that contains landwaste that shale shaker is discharged.At first move ahead and adhering on the landwaste of mud in vibration with drilling waste water spray, most of mud that landwaste is adhered to comes off.First module is cleaned the slime water that is produced and is entered in the holding vessel, does not add any medicament during owing to spray, can guarantee not modification of drilling waste water; The landwaste that leaves the vibratory sieve sand-washing device falls into a spiral sand moisture of Unit second from washer, during rising with spiral pushing device, landwaste is subjected to containing the spray of the pretreated water of medicines such as destabilizing agent, coagulant here again, make its residue harmful substance that adheres to obtain removing, wash back sewage and enter in the foul water tank of its below; The landwaste of being discharged from washer by the sand moisture of Unit second falls into the sand moisture of Unit the 3rd from washer, landwaste makes its salt that adheres to and harmful substance further obtain removing here with the spray of a small amount of clear water of getting back in the spiral pushing device rising.The clear water consumption seldom recycles and can accomplish using water wisely in the 3rd unit spray.At vibratory sieve washer and each spiral sand moisture foul water tank is arranged all below washer, be used for the sewage that splendid attire brings bottoms up and produced, be convenient to come wash cycles with pump.
After cleaning, the requirement that the pollutant index of landwaste leachate is up to state standards can be used as construction material or is used for hardening ground, well site.Wherein the landwaste extrusion rate has reached 98%, deviates from the landwaste particle diameter and reaches d 〉=0.23mm, and landwaste cleans effluent index control: pH6-9, colourity≤80, COD≤300mg/l, CI
-≤ 250mg/l, Cr
6+≤ 0.5mg/l, total chromium≤1.5mg/l.
The slime water that is produced after the landwaste cleaning is pumped into mud from foul water tank take off in steady and the equipment for separating liquid from solid.Here, be pumped to again in the filter press through taking off steady slime water after dosing, the stirring, carry out Separation of Solid and Liquid, isolated solid phase is pressed into mud cake, the pollutant index of its leachate reaches the requirement of discharging standards fully, and mud cake and clay are admixed the utilization that is used for baking bricks with the ratio greater than 5: 1; The filtrate sewage that filter press is deviate from enter sewage take off steady and air-floating apparatus in handle.
In the mud pit existing drilling wastes also can pump into mud take off steady and equipment for separating liquid from solid in, begin to handle, with the difficult problem of solution Separation of Solid and Liquid under current discharging modes.
2, sewage is up to standard divides utilize the processing stage three processes (1) sewage to take off steady and air supporting, entering sewage takes off surely and the sewage in the air-floating apparatus, through dosing, stir, take off steady, air supporting, scrape technology such as slag, after having removed oxious component and most suspended substances, enter and accept in the sewage oxidation flocculation plant further to handle.(2) oxidation forced filtration, along with the adding and the continuous stirring of oxidant, organic matter and harmful microorganism are removed in the oxidizing, flocculating device, the effect that having reached discolors distinguishes the flavor of, after adding flocculant, again sewage is pumped in 600 ~ 1000 order filter presses, make further Separation of Solid and Liquid.The water that is come out by filter press is pumped in the meticulous adsorption filtration device again to be handled.(3) meticulous adsorption filtration, meticulous adsorption filtration device is to be in series by a fine filter and two charcoal filters, sewage flows to three filters here successively, suspension greater than 2m μ is separated, and most of harmful chemical analysis and organic matter are also further removed.
Arrive this, the standard that the major pollutants index of sewage can reach re-injection, recharge safe formation or qualified discharge.
3, reverse-osmosis treated and dense water conservancy are used: the sewage that is come out by meticulous adsorption filtration device is pumped in ultrafiltration or the reverse osmosis unit makes advanced treating, so that remove the dissolving salt in the decontaminated water.Reached agricultural irrigation water quality standard from the water that comes out here.The dense water salt content that obtains through ultrafiltration and reverse-osmosis treated is very high, can be heated, evaporates, concentrate and crystallization goes out Nacl and is used.
Meaning of the present invention is: by above not the landing with boring handling process of drilling wastes realized the Separation of Solid and Liquid of oilfield drilling discarded object, classification is handled, and comprehensive utilization has thoroughly solved the pollution of drilling wastes to environment.
Four, description of drawings:
Fig. 1 is used for the technology schematic flow sheet that drilling waste while drilling before falling onto ground in oil-gas fields is handled
Fig. 2 is used for the complete skid mounted equipment combination of the technology schematic diagram that drilling waste while drilling before falling onto ground in oil-gas fields is handled
Fig. 3 is a landwaste cleaning device schematic diagram
Five, the specific embodiment:
The present invention can carry out the drilling wastes that returns out from well head handling with boring before landing, and also the processing and utilizing of classifying again after the dilution of the discarded slurry in the discarded slurry pond can be realized drilling well environmental protection equipment skidization.Can be used as aggregate after isolated landwaste is cleaned totally from drilling wastes is used; The slime water that produces of bringing bottoms up forms mud cake through dosing, after taking off steady, flocculation, Separation of Solid and Liquid, can admix in proportion with clay or shale powder to be used for baking bricks; Pretreating process such as separated filtrate water is steady through taking off, flocculation, air supporting, oxidation and adsorption filtration are removed major pollutants, can be used for the oil field re-injection, recharge safe formation or qualified discharge; After the advanced treating of sewage through methods such as ultrafiltration, reverse osmosis deaslinations, can reach agricultural irrigation water quality standard.
The useless brill of drilling well thing does not land and with boring the technical process of handling is:
1, landwaste separate to clean, mud takes off surely, Separation of Solid and Liquid and mud cake utilization, and the landwaste of being discharged by shale shaker overlaps screw conveyor by one and sends on the first module-vibratory sieve washer of the landwaste cleaning device of being made up of three unit.At first move ahead and adhering on the landwaste of mud in vibration with drilling waste water spray, most of mud that landwaste is adhered to comes off.First module is cleaned the slime water that is produced and is entered in the sludge water holding vessel.Owing to do not add any medicament during spray, can guarantee not modification of drilling waste water, satisfy drilling well and join the slurry needs; The landwaste that leaves vibratory sieve falls into a spiral sand moisture of Unit second from washer, during rising with spiral pushing device, landwaste is subjected to containing the spray of the pretreated water of medicines such as destabilizing agent, coagulant here again, make its residue harmful substance that adheres to obtain removing, wash back sewage and enter in the foul water tank of its below; The grit water separator that the landwaste of being discharged from washer by first sand moisture falls into Unit the 3rd cleans, and the spray of a small amount of clear water of getting back during landwaste here rises with spiral pushing device makes its salt that adheres to and harmful substance further obtain removing.The clear water consumption seldom can be accomplished using water wisely in the 3rd unit spray.Below vibratory sieve and each spiral grit water separator, foul water tank is arranged all, be used for the sewage that splendid attire brings bottoms up and produced, be convenient to be used for wash cycles.
After cleaning, the requirement that the pollutant index of landwaste leachate is up to state standards can be used as construction material or is used for hardening ground, well site.
The slime water that is produced after the landwaste cleaning is pumped into mud from foul water tank take off in steady and the equipment for separating liquid from solid.Here, be pumped to again in the order filter press through taking off steady slime water after dosing, the stirring, carry out Separation of Solid and Liquid, isolated solid phase is pressed into mud cake, the pollutant index of its leachate reaches the requirement of discharging standards fully, can be used for baking bricks with the ratio blending greater than 5: 1 with clay; The filtrate sewage that filter press is deviate from enter sewage take off steady and air-floating apparatus in handle.
In the mud pit existing drilling wastes also can pump into mud take off steady and equipment for separating liquid from solid in, begin to handle, with the difficult problem of solution Separation of Solid and Liquid under current discharging modes.
2, sewage disposal stage (1) sewage takes off steady and air supporting, entering sewage takes off surely and the sewage in the air-floating apparatus, through dosing, stir, take off steady, air supporting, scrape technology such as slag, after having removed oxious component and most suspended substances, enter and accept in the sewage oxidation flocculation plant further to handle.(2) oxidation forced filtration, along with the adding and the continuous stirring of oxidant, organic matter and harmful microorganism are removed in the oxidizing, flocculating device, the effect that having reached discolors distinguishes the flavor of.After adding flocculant, again sewage is pumped in the 1000 order filter presses, make further Separation of Solid and Liquid.The water that is come out by filter press is pumped in the meticulous adsorption filtration device again to be handled.(3) meticulous adsorption filtration, meticulous adsorption filtration device is to be in series by a fine filter and two charcoal filters, sewage flows to three filters here successively, suspension greater than 5m μ is separated, and most of harmful chemical analysis and organic matter are also further removed.
Arrive this, the standard that the major pollutants index of sewage can reach re-injection, recharge safe formation or qualified discharge.
3, reverse-osmosis treated and dense water conservancy are used: the sewage that is come out by meticulous adsorption filtration device is pumped in ultrafiltration or the reverse osmosis unit makes advanced treating, so that remove the dissolving salt in the decontaminated water.Reached agricultural irrigation water quality standard from the water that comes out here.The dense water salt content that obtains through ultrafiltration and reverse-osmosis treated is very high, can be heated, evaporates, concentrate and crystallization goes out Nacl and is used.
Claims (1)
1. one kind is used for the technology that drilling waste while drilling before falling onto ground in oil-gas fields is handled, it is characterized in that: it carried out handling with boring before landing to the drilling wastes that returns out from well head, realize innoxious comprehensive utilization, isolated landwaste is cleaned clean then being used as aggregate from drilling wastes; The slime water that produces of bringing bottoms up forms mud cake through dosing, after taking off steady, flocculation, Separation of Solid and Liquid, can admix in proportion with clay or shale powder to be used for baking bricks; Separated filtrate water is steady through taking off, flocculation, air supporting, oxidation and adsorption filtration pretreating process, removes major pollutants, is used for the oil field re-injection, recharges safe formation or qualified discharge; After the advanced treating of sewage through ultrafiltration, reverse osmosis deaslination method, reach agricultural irrigation water quality standard; Wherein,
Landwaste separate to clean the landwaste of being discharged by shale shaker and sends into by a cover screw conveyor on the vibratory sieve sand-washing device of first module of the landwaste cleaning device of being made up of three unit, at first move ahead and adhering on the landwaste of mud in vibration with drilling waste water spray, most of mud that landwaste is adhered to comes off, first module is cleaned the slime water that is produced and is entered in the sludge water holding vessel, owing to do not add any medicament during spray, can guarantee not modification of drilling waste water; The landwaste that leaves vibratory sieve falls into the spiral sand moisture of Unit second from washer, during rising with spiral pushing device, landwaste is subjected to containing the spray of the pretreated water of destabilizing agent, coagulant here again, make its residue harmful substance that adheres to obtain removing, wash back sewage and enter in the foul water tank of its below; The landwaste of being discharged from washer by the sand moisture of Unit second falls into the sand moisture of Unit the 3rd from washer, landwaste makes its solubility salt that adheres to and harmful substance further obtain removing here with the spray of a small amount of clear water of getting back in the spiral pushing device rising; The clear water consumption seldom recycles and can accomplish using water wisely in the 3rd unit spray; At vibratory sieve and each spiral sand moisture foul water tank is arranged all below washer, be used for the sewage that splendid attire brings bottoms up and produced, be convenient to be used for wash cycles, after cleaning, the requirement that the pollutant index of landwaste leachate is up to state standards is as construction material or the ground, well site that is used for hardening;
Mud takes off surely, Separation of Solid and Liquid and mud cake utilization are will landwaste to clean slime water that the back produced to pump into mud take off in steady and the equipment for separating liquid from solid from foul water tank, here, be pumped in the filter press again through taking off steady slime water after dosing, the stirring, carry out Separation of Solid and Liquid, isolated solid phase is pressed into mud cake, the pollutant index of its leachate reaches the requirement of discharging standards fully, can be used for baking bricks with the ratio blending greater than 5: 1 with clay; The filtrate sewage that filter press is deviate from enter sewage take off steady and air-floating apparatus in handle; In the mud pit existing drilling wastes pump into mud take off steady and equipment for separating liquid from solid in handle, with the difficult problem of solution Separation of Solid and Liquid under current discharging modes;
The sewage disposal stage, the one, the sewage dosing is taken off steady and air supporting, enter sewage and take off sewage in steady and the air-floating apparatus, through dosing, stir, take off surely, air supporting and scrape slag technology, after having removed oxious component and most suspended substances, enter and accept in the sewage oxidation flocculation plant further to handle; The 2nd, the oxidation forced filtration, in the oxidizing, flocculating device along with the adding and the continuous stirring of oxidant, the oxidized removal of organic matter and harmful microorganism, the effect that having reached discolors distinguishes the flavor of; After adding flocculant, again sewage is pumped into 600---in the 1000 order filter presses, make further Separation of Solid and Liquid; The water that is come out by filter press is pumped in the meticulous adsorption filtration device again to be handled; The 3rd, meticulous adsorption filtration, meticulous adsorption filtration device is to be in series by a fine filter and two charcoal filters, sewage flows to three filters here successively, suspension greater than 2 μ m is separated, and most of harmful chemical analysis and organic matter are also further removed; Arrive this, the standard that the major pollutants index of sewage reaches re-injection, recharges safe formation or qualified discharge;
Reverse-osmosis treated and dense water conservancy are used, the sewage that is come out by meticulous adsorption filtration device is pumped in ultrafiltration or the reverse osmosis unit makes advanced treating, so that remove the dissolving salt in the decontaminated water, reached agricultural irrigation water quality standard from the water that comes out here, the dense water salt content that obtains through ultrafiltration and reverse-osmosis treated is very high, is heated, evaporates, concentrates and crystallization goes out Nacl and is used.
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| CN2008100496730A CN101690937B (en) | 2008-04-30 | 2008-04-30 | Process technology for treating drilling waste while drilling before falling onto ground in oil-gas fields |
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| CN101690937B true CN101690937B (en) | 2011-06-29 |
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| CN101690937A (en) | 2010-04-07 |
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Address after: In Puyang city 457000 East Industrial Agglomeration Area in Henan Province Kam Tin Road Patentee after: Puyang environmental Polytron Technologies Inc Address before: 457001 Zhongyuan Oilfield Industrial Zone, Zhongyuan Road, Henan, Puyang Patentee before: Tiandiren Environment Protecting Engineering & Techn Co., Ltd., Puyang |