CN106145440A - Oil gas field waste water-base drilling liquid solid-liquid separating method - Google Patents
Oil gas field waste water-base drilling liquid solid-liquid separating method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The present invention discloses solid-liquid separating method when a kind of oil gas field waste water-base drilling liquid processes, mainly take off steady reagent combination by filtering out applicable waste water-base drilling liquid, respectively Xinjiang, Chuan Dong, each waste water-base drilling liquid creeping into the stage of western sichuan region oil gas field are carried out brokenly glue and process, liquid phase thing therein is made thoroughly to discharge, solid formation fully precipitates, realizing solid-liquid separation by filtration again, the filtrate for postorder processes creation precondition.
Description
Technical field
The present invention relates to sewage disposal technology, specifically, be in a kind of oil gas field waste water-base drilling liquid processing procedure
Solid-liquid separating method.
Background technology
China's oilfield drilling liquid, based on water-base drilling fluid, accounts for more than the 90% of total amount, and water-base drilling fluid is by following
Several parts form:
(1) liquid phase: the water added during preparation mud, the oil etc. added for lubrication；
(2) solid phase: bentonite, heavy weight additive etc.；
(3) drilling fluid additive: add the inorganic salt of people, Organic substance, synthetic polymer, table for improving drilling mud performance
Face activating agent etc..
Waste water-base drilling liquid refer to oil gas field dig a well during formed the most available mud, be one complicated
Heterogeneous system, in addition to the various materials added by preparation drilling mud, the subsoil water that is mixed into when also including creeping into stratum, drilling cuttings,
Clay, crude oil etc., moisture content about 60-80%, solid content about 20-40%, oil content 1-6%, additionally possibly together with other Organic substance
And volatile material.The waste water-base drilling liquid about ten thousand stere more than 90 that annual China oilfield drilling produces, yield is very
Huge.
Waste water-base drilling liquid composition is more complicated, pollutes relatively big, and the impact on environment is also many, main harm
Having: (1) contaminated area is big, region is wide, this is to be produced the features such as mobility is big by drilling well to be determined；(2) excessive concentrations is solvable
Property salt and Organic substance, affect structure and the growth of harm plant of soil；(3) containing heavy metal ion, it is difficult to by animals and plants
Degraded, and the healthy of the mankind can be endangered at environment or animals and plants body accumulation.
Owing to the geological condition of each department Oil/gas Well is different, the system creeping into water-base drilling fluid used by each stage is different,
The formation material being mixed into when creeping into is the most different, and this just brings extreme difficulties to the process of waste water-base drilling liquid, especially, and polymerization
Solid, liquid phase material in the series water-based drilling fluid of objects system, polysulfonate coexists with colloid ion form, how to realize solid-liquid and divides
From, become the key that waste water-base drilling liquid processes.
Summary of the invention
The solid-liquid separating method when present invention provides a kind of oil gas field waste water-base drilling liquid to process, the method is repeatedly to try
The summary of experience tested, and application is proved to effective in practice.
The technical solution of the present invention is:
A kind of oil gas field waste water-base drilling liquid solid-liquid separating method, described waste water-base drilling liquid refer to Xinjiang, Chuan Dong,
The waste water-base drilling liquid of western sichuan region oil gas field；Described Xinjiang region oil gas field opens the stage water base swelling of use in the one of drilling well
Soil body system water-base drilling fluid, opens the stage in the two of drilling well and uses polymeric system water-base drilling fluid, open in the three of drilling well, four open rank
Section uses the series water-based drilling fluid of polysulfonate；Described eastern Sichuan Basin oil gas field opens stage use foam Bentonite System in the one of drilling well
Water-base drilling fluid, opens stage use polymeric system water-base drilling fluid two, opens the stage use series water-based drilling well of polysulfonate three
Liquid；Described western sichuan region opens stage use polymeric system water-base drilling fluid in the one of drilling well, opens two and uses with after-stage
The series water-based drilling fluid of polysulfonate；Each stage is mixed into formation material in drilling process, forms corresponding waste water-base drilling liquid；Press
Following method carries out solid-liquid separation respectively to each department, the waste water-base drilling liquid in each stage:
(1) Xinjiang region
One opens stage Bentonite System waste water-base drilling liquid, uses standing sedimentation method so that it is in suspension solid matter
Natural subsidence, forms mud, then with Filtration, it is achieved solid-liquid separation；
Two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add flocculant PAC14～
15kg, makes solid matter condense, then with Filtration, leaches solid matter, it is achieved solid-liquid separation；
Three open, four open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds flocculant PAC 14
～15kg, flocculation aid PAM 0.45～0.6kg；Make solid matter therein condense, then with Filtration, leach solid matter, real
Existing solid-liquid separation；
(2) eastern Sichuan Basin
One opens stage Bentonite System waste water-base drilling liquid, uses standing sedimentation method so that it is in solid matter natural
Sedimentation, forms mud, then with Filtration, it is achieved solid-liquid separation；
Two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add flocculant PAC18～
20kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg so that it is in solid matter cohesion, then with Filtration, filter
Go out solid matter, it is achieved solid-liquid separation；
Three open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add compounding gel breaker 30～
35kg, flocculant PAC3～4kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg, make colloid ion rupture, wherein
The release of liquid phase thing, solid matter condenses, then with Filtration, leaches solid matter, it is achieved solid-liquid separation；
(3) western sichuan region
One opens stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds gel breaker 10～11kg,
Flocculant PAC3～5kg, stabilizer 4～6kg, make colloid ion rupture, and liquid phase substance therein discharges, and solid matter condenses,
Again with Filtration, leach solid matter, it is achieved solid-liquid separation；
Two open and with after-stage polysulfonate system waste water-base drilling liquid, 1m3Rejected well drilling liquid adds gel breaker 20kg, flocculation
Agent PAC3～4kg, stabilizer 10～12kg, make colloid ion rupture, and liquid phase thing therein discharges, and solid matter condenses, then uses
Filtration, leaches solid matter, it is achieved solid-liquid separation.
Described flocculant PAC is aluminium polychlorid, and described flocculation aid PAM is polyacrylamide, and described stabilizer is oxidation
Calcium, described gel breaker is aluminum sulfate, and described compounding gel breaker is the mixture of aluminum sulfate and sulphuric acid, and its proportioning is aluminum sulfate 30-
The sulphuric acid 0.02L of 35kg:2mol/L.
Described flocculation aid PAM is the PAMC of molecular weight >=6,000,000.
Described Filtration is to use Filter Press.
Beneficial effects of the present invention:
Using above-mentioned medicament to process waste water-base drilling liquid, broken glue is respond well, and liquid phase substance thoroughly discharges, Gu
Phase material fully condenses, then realizes solid-liquid separation by filter pressing, and the filtrate process for postorder creates superior precondition.
The main detailed description present invention as a example by east, river below.
Accompanying drawing explanation
Fig. 1 is the impact on East, river rejected well drilling liquid of the gel breaker aluminum chloride dosage
Fig. 2 is the compounding gel breaker dosage impact on East, river rejected well drilling liquid
Fig. 3 is the impact on East, river polymeric system rejected well drilling liquid CST of the PAC dosage
Fig. 4 is the impact on East, river polysulfonate system rejected well drilling liquid CST of the PAC dosage
Fig. 5 is the impact on dewatering of the flocculation aid dosage
Fig. 6 is the impact on dewatering of the stabilizer dosage.
Detailed description of the invention
Embodiment one
Eastern Sichuan Basin waste water-base drilling liquid solid-liquid separating method, this area opens stage use foam swelling in the one of drilling well
Soil body system water-base drilling fluid, opens stage use polymeric system water-base drilling fluid two, opens stage use polysulfonate system water three
Base drilling fluid；Each stage is mixed into formation material in drilling process, forms the waste water-base drilling liquid of corresponding system；By such as lower section
Method waste water-base drilling liquid to each stage respectively carries out solid-liquid separation:
One opens stage Bentonite System waste water-base drilling liquid, uses standing sedimentation method so that it is in solid matter natural
Sedimentation, forms mud, then with Filtration, it is achieved solid-liquid separation.
Two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add flocculant PAC18～
20kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg so that it is in solid matter cohesion, then with Filtration, filter
Go out solid matter, it is achieved solid-liquid separation.
Three open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add compounding gel breaker 30～
35kg, flocculant PAC3～4kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg, make colloid ion rupture, wherein
The release of liquid phase thing, solid matter condenses, then with Filtration, leaches solid matter, it is achieved solid-liquid separation.
Described compounding gel breaker is the mixture of aluminum sulfate and sulphuric acid, and described flocculant PAC is aluminium polychlorid, described in help
Solidifying agent PAM is polyacrylamide, and described stabilizer is calcium oxide.
Described flocculation aid PAM is the PAMC of molecular weight >=6,000,000.
Described two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds flocculant PAC18
～20kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg.
Described three open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds compounding gel breaker 30
～35kg, flocculant PAC3～4kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg；Described compounding gel breaker is
Aluminum sulfate and the mixture of sulphuric acid, its proportioning is the sulphuric acid 0.02L of aluminum sulfate 30-35kg:2mol/L.
Described Filtration is to use Filter Press.
The core content of the present invention, is intended to find applicable treatment agent and dosage thereof, makes in waste water-base drilling liquid
Solid matter fully condense, solid-liquid separation could be realized.
Owing to the composition of waste water-base drilling liquid is extremely complex, it is impossible to determined the class for the treatment of agent by theory analysis
Type, can not calculate the dosage of medicament, have to be found by experiment, and technique scheme is drawn by following experiment.
Treatment agent screening experiment
(1) screening of medicament kind
Gel breaker, flocculant, flocculation aid kind is determined according to pharmacy test (single medicament or compound drug)；By investigating
The funnel viscosity parameter of rejected well drilling liquid determines medicament kind.
(2) the best dosage determines
The treatment agent screened is carried out the test of different proportion, various combination, with capillary water absorbing time (CST) for examining
Examine index, determine the optimum dosage of medicament.
(3) determination of optimal reagent combination
On the basis of (1) (2) experimental study, bored by the incompatible waste water-base determining different drilling fluid system of test group
The optimization process reagent combination of well liquid, with capillary water absorbing time as inspection target.
(1) screening of gel breaker
The most single gel breaker performance study
Take the waste water-base drilling liquid of 100mL in beaker, add a certain amount of as shown in table 2-6 be configured to the denseest
The solution of degree, stirs 10min with 150r/min, then stirs 20min with 80r/min, and after standing 20min, broken glue completes.In examination
Swelling first occurs during testing, along with the change of mixing time, gradually has flco to produce, measure the funnel of rejected well drilling liquid
Viscosity, the treatment effect of different gel breakers is as shown in table 1.
The different gel breaker treatment effect of table 1
Table 1 can be seen that, it is adaptable to the gel breaker of the rejected well drilling liquid of East, river polymeric system is AlCl3, but process
DeGrain.The gel breaker of the rejected well drilling liquid being applicable to East, river polysulfonate system is Al2(SO4)3、FeCl3And H2SO4, warp
Cross funnel viscosity after breaking gel and all have significantly reduction.But H2SO4Water body pH after breaking gel is acidity, to follow-up water treatment facilities
Antiseptic property require the highest, therefore can be by H in Practical Project2SO4It is used in combination with other gel breakers, for the brill of alkalescence
Well liquid may also operate as neutralizing the effect of pH.
2. gel breaker performance study is compounded
Filter out three kinds of gel breakers are made built agent, the waste water-base drilling liquid of East, river polysulfonate system is broken
Glue is tested, and result of the test is as shown in table 2.
Table 2 compounds gel breaker treatment effect
From table 2 it can be seen that using H2SO4With other gel breakers carry out certain proportion compounding after, broken glue effect is better than
The using effect of single gel breaker.Al is can be seen that from funnel viscosity index2(SO4)3With H2SO4Built agent is better than Fe Cl3With
H2SO4Built agent, and FeCl3The color of compounding gel breaker water outlet is dark yellow, and this is a large amount of owing to introducing in waste water system
Iron ion, be not easy to the process of waste water, the most do not select this gel breaker.Retouch for the ease of follow-up test
State, by Al2(SO4)3With H2SO4Built agent is defined as compounding gel breaker.
(2) flocculant and the screening of flocculation aid
1. the screening of flocculant
Take 100mL respectively through Al2(SO4)3The compound gel breaker waste water-base drilling liquid of polysulfonate system after breaking gel, warp
Cross AlCl3Polymeric system waste water-base drilling liquid after breaking gel and do not break the waste water-base drilling well of the polymeric system that glue processes
Liquid, in three beakers, is separately added into 20mL and prepares the flocculant of 10% concentration, and experimental result is shown in Table 3.
The treatment effect of the different flocculant of table 3
From table 3 it can be seen that PAC has preferably process to the waste water-base drilling liquid of polymeric system and polysulfonate system
Effect, especially polymeric system dehydration is substantially.Although PFC also has good treatment effect, funnel viscosity has significantly reduction,
But the remaining colourity due to himself so that the water quality colourity of dehydration is high, and poly-ferric chloride itself also has strong corruption simultaneously
Erosion property, therefore has higher requirement, thus considers in this project and be not suitable for this flocculant equipment anticorrosion performance.
2. the screening of flocculation aid
PAM solution to 0.5% of the sample addition 40mL configuration after flocculation, experimental result is shown in Table 4.
The treatment effect of the different flocculation aid of table 4
Being analyzed by table 4 and show, molecular weight is that the PAM of 6,000,000 is to East, river polymeric system and the waste water of polysulfonate system
Base drilling fluid has preferable treatment effect, and rejected well drilling liquid funnel viscosity value after treatment is minimum.
(3) determination of single factor test added amount of chemical
1. gel breaker consumption test
By the screening of gel breaker it can be seen that the polymeric system of East, river is applicable to aluminum chloride gel breaker, polysulfonate body
The rejected well drilling liquid of system is applicable to compounding gel breaker.The dosage that different gel breaker is optimal is explored in this test further.At room temperature
Under the conditions of, take the waste water-base drilling liquid of 100mL in beaker, add different amounts of gel breaker, with waste water-base drilling liquid
Zeta potential and capillary water absorbing time are reference index, and result is as shown in Figure 1 and Figure 2.
Fig. 1 is visible, the optimal gel breaker dosage of the waste water-base drilling liquid of East, river polymeric system be 0.8～
1.2g, current potential goes to zero, and CST value is reduced to minimum 160, reduction rate 27.27% by 220.
Fig. 2 is visible, the optimal compounding gel breaker dosage of the waste water-base drilling liquid of East, river polysulfonate system be 3～
3.5g, current potential goes to zero, and CST value is reduced to minimum 175, reduction rate 53.95% by 380.
2. flocculant usage test
From the test of Selection of Complex Flocculant, PAC, except having the effect of flocculation, also has the effect of broken glue, and Chuan Dong
The gel breaker of district's polymer breaks glue effect significantly, and therefore this test uses following thinking to test:
Sample one: the rejected well drilling liquid of polymeric system adds 1.0g gel breaker aluminum chloride, treats fully to add after breaking gel
The PAC solution of 10.0%；
Sample two: the rejected well drilling liquid of polymeric system is directly added into the PAC solution of 10.0%；
Sample three: the rejected well drilling liquid of polysulfonate system adds the compounding gel breaker of 3.5g, treats fully to add after breaking gel
The PAC solution of 10.0%；
Respectively three samples are tested, to waste water-base drilling liquid hair in the case of the different flocculant dosage of investigation
The impact of thin absorbent time, result is as shown in Figure 3, Figure 4.
From figure 3, it can be seen that along with the increase of PAC dosage, the rejected well drilling liquid of East, river polymeric system is through chlorine
Changing aluminum sample after breaking gel, PAC optimum dosage is 15～18mL, and CST value is reduced to 73 by 160, and reduction rate is 54.38%；
The optimal coagulant dose being directly added into PAC without the polymer rejected well drilling liquid of broken glue is that 18-24mL, CST value is reduced to by 224
74, reduction rate is 66.96%.
As seen from Figure 4, the rejected well drilling liquid of East, river polysulfonate system is after broken glue processes, and optimal PAC dosage is
3-5mL, optimum point is that 4mL, CST value is reduced to 80 by 176, and reduction rate is 54.55%.
The comprehensive dosage test analyzing gel breaker and PAC can draw: the rejected well drilling liquid of East, river polymeric system is adopted
After processing with " gel breaker+PAC ", optimal situation is treatment agent consumption 2.5～2.8g, and CST is 73S, and uses and be directly added into
It is treatment agent consumption 1.8～2.4g that PAC processes optimal situation, and CST is 74S, thus, it could be seen that to East, river polymeric system
The treatment agent of rejected well drilling liquid can be directly added into PAC and carry out pretreatment.
3. flocculation aid consumption test
Under normal temperature condition, the waste water-base drilling liquid taking 100mL respectively is placed on beaker through optimized pretreatment
In, then add the flocculation aid of 0.5%, investigate the different dosage impact on waste water-base drilling liquid capillary water absorbing time, knot
Fruit is as shown in Figure 5.
Fig. 5 is visible, and East, river waste water-base drilling liquid is elder generation through pretreated sample adding along with PAM, CST value
The trend raised after reduction is identical with the variation tendency in Xinjiang district.Polymeric system and polysulfonate when dosage is 1.0-1.2mL
The drilling fluid of system all reaches the minimum of CST.Add it is thus determined that the optimum dosage of PAM is 100mL rejected well drilling liquid
The PAM1.0-1.2mL of 0.5%.
4. stabilizing agent dosage test
Sample after testing PAM proceeds the test of stabilizer dosage, and result is as shown in Figure 6.
As seen from Figure 6, after the polymeric system of East, river and polysulfonate system rejected well drilling liquid add stabilizer (quick lime)
CST value tends towards stability after all reducing, therefore, when the rejected well drilling liquid stabilizing agent dosage of East, river is 0.2-0.3g, and treatment effect
Optimum.
(4) determination of optimization process reagent combination
1. East, river polymeric system waste drilling fluids disposal reagent combination test
This research use orthogonal test method, with PAC dosage, PAM dosage, stabilizer dosage for test because of
Element, with capillary water absorbing time and mud cake leachate water quality as inspection target, by test result analysis, draws the throwing of three kinds of medicaments
The optimal combination of dosage.The factor level determined is shown in Table 5.
Table 5 orthogonal test factor and level
According to factor and level conditions, select L9(33) orthogonal table, testing program is as shown in table 6.
Table 6 orthogonal test designs table
| Test number | A | B | C | Test index 1 | Test index 2 |
| 1 | 1 | 1 | 1 | X1 | Y1 |
| 2 | 1 | 2 | 2 | X2 | Y2 |
| 3 | 1 | 3 | 3 | X3 | Y3 |
| 4 | 2 | 1 | 2 | X4 | Y4 |
| 5 | 2 | 2 | 3 | X5 | Y5 |
| 6 | 2 | 3 | 1 | X6 | Y6 |
| 7 | 3 | 1 | 3 | X7 | Y7 |
| 8 | 3 | 2 | 1 | X8 | Y8 |
| 9 | 3 | 3 | 2 | X9 | Y9 |
This test, under normal temperature condition, takes the waste water-base drilling liquid of 100mL in beaker, respectively tests according to orthogonal test
Imposing a condition of numbering, is separately added into the medicament setting dosage, stirs 30min with 150r/min, fully reacts, and then measures useless
Abandon the capillary water absorbing time of water-base drilling fluid, and the mud cake after separating is carried out leachate water quality monitoring, Analysis for CO D index feelings
Condition.After process, the capillary water absorbing time of waste water-base drilling liquid and the water quality of mud cake leachate are as inspection target, are just carrying out
Handing over test, further Optimizing Technical, result is as shown in table 7.
East, table 7 river polymeric system rejected well drilling liquid orthogonal experiments
From the result of table 7 orthogonal test it can be seen that affect East, river polymeric system waste water-base drilling liquid dehydration property
Flocculant dosage, stabilizer dosage and flocculation aid dosage can be respectively as follows: with mud cake leachate water qualitative factor importance.
From orthogonal test, CST value that test number 3,5,7,8,9 is final and mud cake leachate water quality situation relatively other test group phases
More bad than effect, it is thus determined that optimum dosage is combined as: 100mL rejected well drilling liquid adds flocculant 1.8～2.0g, stabilizer
0.2～0.25g, flocculation aid 0.005～0.006g.Being converted into Practical Project dosage is: 1m3Waste water-base drilling liquid adds wadding
Solidifying agent PAC18～20kg, flocculation aid PAM0.05～0.06kg, stabilizer 2～2.5kg.
2. East, river polysulfonate system waste drilling fluids disposal reagent combination test
This research uses the method for orthogonal test, with compounding gel breaker dosage, PAC dosage, PAM dosage, stablizes
Agent dosage is experimental factor, with capillary water absorbing time and mud cake leachate water quality as inspection target, by test result analysis,
Draw the optimal combination of the dosage of four kinds of medicaments.The factor level determined is shown in Table 8.
Table 8 orthogonal test factor and level
According to factor and level conditions, select L9(34) orthogonal table, testing program is as shown in table 9.
Table 9 orthogonal test designs table
This test, under normal temperature condition, takes the waste water-base drilling liquid of 100mL in beaker, respectively tests according to orthogonal test
Imposing a condition of numbering, is separately added into the medicament setting dosage, stirs 30min with 150r/min, fully reacts, and then measures useless
Abandon the capillary water absorbing time of water-base drilling fluid, and the mud cake after separating is carried out leachate water quality, monitor Analysis for CO D index feelings
Condition.After process, the capillary water absorbing time of waste water-base drilling liquid and the water quality of mud cake leachate are as inspection target, are just carrying out
Handing over test, further Optimizing Technical, result is as shown in table 10.
East, table 10 river polysulfonate system rejected well drilling liquid orthogonal experiments
From the result of table 10 orthogonal test it can be seen that affect waste water-base drilling liquid dewatering and mud cake leachate water
Qualitative factor importance is: gel breaker dosage, flocculant dosage, stabilizer dosage, flocculation aid dosage.By orthogonal
Testing visible, in addition to experimental group 3,6,7,8,9, the result of the test of other experimental grouies is ideal, it is thus determined that East, river polysulfonate
The treatment agent optimum dosage of system waste water-base drilling liquid is combined as: 100mL rejected well drilling liquid adds compounding gel breaker 3.0
～3.5g, flocculant 0.3～0.4g, stabilizer 0.2～0.25g, flocculation aid 0.005～0.006g.It is converted into Practical Project to throw
Dosage is: 1m3Waste water-base drilling liquid adds compounding gel breaker aluminum sulfate 30～35kg, flocculant PAC3～4kg, flocculation aid
PAM0.05～0.06kg, stabilizer 2～2.5kg.
Embodiment two
Xinjiang region waste water-base drilling liquid solid-liquid separating method.
One opens stage Bentonite System waste water-base drilling liquid, uses standing sedimentation method so that it is in suspension solid matter
Natural subsidence, forms mud, then with Filtration, it is achieved solid-liquid separation；
Two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add flocculant PAC14～
15kg, makes solid matter condense, then with Filtration, leaches solid matter, it is achieved solid-liquid separation；
Three open, four open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds flocculant PAC 14
～15kg, flocculation aid PAM 0.45～0.6kg；Make solid matter therein condense, then with Filtration, leach solid matter, real
Existing solid-liquid separation.
The screening of its treatment agent and dosage determine that experiment is similar with embodiment one, repeat no more.
Embodiment three
Western sichuan region waste water-base drilling liquid solid-liquid separating method.
One opens stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds gel breaker 10～11kg,
Flocculant PAC3～5kg, stabilizer 4～6kg, make colloid ion rupture, liquid phase thing substance release therein, and solid matter coagulates
Poly-, then with Filtration, leach solid matter, it is achieved solid-liquid separation；
Two open and with after-stage polysulfonate system waste water-base drilling liquid, 1m3Rejected well drilling liquid adds gel breaker 20kg, flocculation
Agent PAC3～4kg, stabilizer 10～12kg, make colloid ion rupture, and liquid phase thing therein discharges, and solid matter condenses, then uses
Filtration, leaches solid matter, it is achieved solid-liquid separation.
The screening of its treatment agent and dosage determine that experiment is similar with embodiment one, repeat no more.
Claims (4)
1. an oil gas field waste water-base drilling liquid solid-liquid separating method, it is characterised in that described waste water-base drilling liquid refers to
Xinjiang, Chuan Dong, the waste water-base drilling liquid of western sichuan region oil gas field；Described Xinjiang region oil gas field made in a stage of opening of drilling well
With water base Bentonite System water-base drilling fluid, open stage use polymeric system water-base drilling fluid in the two of drilling well, in drilling well
Three open, four open the stage and use the series water-based drilling fluid of polysulfonate；Described eastern Sichuan Basin oil gas field opens stage use bubble in the one of drilling well
Foam Bentonite System water-base drilling fluid, opens stage use polymeric system water-base drilling fluid two, opens stage use polysulfonate three
Series water-based drilling fluid；Described western sichuan region is opened the stage in the one of drilling well and is used polymeric system water-base drilling fluid, open two and
The series water-based drilling fluid of polysulfonate is used with after-stage；Each stage is mixed into formation material in drilling process, is formed corresponding discarded
Water-base drilling fluid；The most respectively each department, the waste water-base drilling liquid in each stage are carried out solid-liquid separation:
(1) Xinjiang region
One opens stage Bentonite System waste water-base drilling liquid, uses standing sedimentation method so that it is in suspension solid matter natural
Sedimentation, forms mud, then with Filtration, it is achieved solid-liquid separation；
Two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds flocculant PAC14 ~ 15kg, makes
Solid matter condenses, then with Filtration, leaches solid matter, it is achieved solid-liquid separation；
Three open, four open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid add flocculant PAC 14 ~
15kg, flocculation aid PAM 0.45 ~ 0.6kg；Make solid matter therein condense, then with Filtration, leach solid matter, it is achieved Gu
Liquid separates；
(2) eastern Sichuan Basin
One opens stage Bentonite System waste water-base drilling liquid, uses standing sedimentation method so that it is in solid matter natural subsidence,
Form mud, then with Filtration, it is achieved solid-liquid separation；
Two open stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds flocculant PAC18 ~ 20kg, helps
Solidifying agent PAM0.05 ~ 0.06kg, stabilizer 2 ~ 2.5kg so that it is in solid matter cohesion, then with Filtration, leach solid formation
Matter, it is achieved solid-liquid separation；
Three open stage polysulfonate system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds compounding gel breaker 30 ~ 35 kg, wadding
Solidifying agent PAC3 ~ 4kg, flocculation aid PAM0.05 ~ 0.06kg, stabilizer 2 ~ 2.5kg, make colloid ion rupture, liquid phase substance therein
Release, solid matter condenses, then with Filtration, leaches solid matter, it is achieved solid-liquid separation；
(3) western sichuan region
One opens stage polymerization objects system waste water-base drilling liquid, 1m3Waste water-base drilling liquid adds gel breaker 10 ~ 11 kg, flocculation
Agent PAC3 ~ 5kg, stabilizer 4 ~ 6kg, make colloid ion rupture, and liquid phase substance therein discharges, and solid matter condenses, then uses
Filter method, leaches solid matter, it is achieved solid-liquid separation；
Two open and with after-stage polysulfonate system waste water-base drilling liquid, 1m3Rejected well drilling liquid adds gel breaker 20 kg, flocculant
PAC3 ~ 4kg, stabilizer 10 ~ 12 kg, make colloid ion rupture, and liquid phase substance therein discharges, and solid matter condenses, then uses
Filter method, leaches solid matter, it is achieved solid-liquid separation.
2. oil gas field waste water-base drilling liquid solid-liquid separating method as claimed in claim 1, it is characterised in that described flocculant
PAC is aluminium polychlorid, and described flocculation aid PAM is polyacrylamide, and described stabilizer is calcium oxide, and described gel breaker is sulphuric acid
Aluminum, described compounding gel breaker is the mixture of aluminum sulfate and sulphuric acid, and its proportioning is the sulphuric acid of aluminum sulfate 30-35kg:2mol/L
0.02L。
3. oil gas field waste water-base drilling liquid solid-liquid separating method as claimed in claim 2, it is characterised in that described flocculation aid
PAM is the PAMC of molecular weight >=6,000,000.
4. oil gas field waste water-base drilling liquid solid-liquid separating method as claimed in claim 1, it is characterised in that described Filtration
It is to use Filter Press.
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| CN106242119A (en) * | 2016-08-31 | 2016-12-21 | 西南石油大学 | Discarded sulphonated polymer mud gel breaker and gel breaking method thereof |
| CN109052908A (en) * | 2018-07-20 | 2018-12-21 | 中国石油天然气集团公司 | Polysulfonate system waste drilling mud processing method |
| CN111533427A (en) * | 2020-04-30 | 2020-08-14 | 中国环境科学研究院 | Method for classifying and treating natural gas drilling waste |
| CN111992567A (en) * | 2020-07-14 | 2020-11-27 | 中国石油天然气集团有限公司 | Classification and quality classification method for water-based drilling solid waste of oil and gas exploration drilling |
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