CN102994057A - Heat-resistant and salt-resistant profile controlling agent and preparation method thereof - Google Patents
Heat-resistant and salt-resistant profile controlling agent and preparation method thereof Download PDFInfo
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- CN102994057A CN102994057A CN2012105371117A CN201210537111A CN102994057A CN 102994057 A CN102994057 A CN 102994057A CN 2012105371117 A CN2012105371117 A CN 2012105371117A CN 201210537111 A CN201210537111 A CN 201210537111A CN 102994057 A CN102994057 A CN 102994057A
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Abstract
The invention discloses a heat-resistant and salt-resistant profile controlling agent, comprising waste slurry, a slurry curing agent, a strength modifier, a dispersant, a retarder and water. Based on the weight of the waste slurry as 100%, the profile controlling agent comprises 6-12 wt% of the slurry curing agent, 6-12 wt% of the strength modifier, 0.1-1.5 wt% of the dispersant, 0.02-0.15 wt% of the retarder and 6-12 wt% of water. The invention also relates to a preparation method of the heat-resistant and salt-resistant profile controlling agent. The heat-resistant and salt-resistant profile controlling agent is obtained by the steps of adding the slurry curing agent, the strength modifier, the dispersant, the retarder and water in the waste slurry, based on the weight of the waste slurry, and standing for 66-78 hours. The invention also provides an application of the waste slurry in preparing the heat-resistant and salt-resistant profile controlling agent.
Description
Technical field
The present invention relates to a kind of temperature resistant antisalt amendment, particularly relate to a kind of discarded slurry that utilizes and prepare temperature resistant antisalt amendment and preparation method thereof.
Background technology
In the oil gas well drilling process, produce a large amount of discarded slurries.Contain certain crude oil, metal ion, remaining chemical agent and some mineral substance.Generally by be exposed to the sun, landfill disposal, not only environmental pollution is very large, and the waste resource.The how innoxious and comprehensive utilization of resources with discarded slurry, both protection of the environment increased again the waste recycling, more and more received the concern of industry.
Now in the oil field of exploitation, oil reservoir have bury dark, formation temperature is high, the salinity high, the amendment of prior art is difficult to satisfy the demand, just have such as carbonate reservoir in Tahe Oilfield and to bury dark, fracture width and be about 0.8～2.0cm, thermograde is 2.2 ℃/100m, and formation temperature high (140 ℃), salinity are high by (2.4 * 10
5Mg/L), reservoir properties is poor, complex pore structure, and seepage state is unusual, causes oil-field development feature and medium to high permeable oil reservoir to be very different, even the variation of matter occurs.The oil field is through too much round cyclic waterflooding, and it is more and more that water filling breaks through well group, the phenomenon of the sudden and violent property of well water logging occurs being imitated.Have the emptying leakage phenomena during brill, there is the large hole of large seam in reservoir, and conventional profile control system can not satisfy system in Tahe Oilfield Profile Control in Injection Well demand.Along with going deep into of waterflooding, oil-field flooding breaks through well group to be increased year by year, and the water-injection efficiency continuous decrease need to be carried out the technical study of carbonatite profile control technology, to be developed, development that temperature resistant antisalt fracture and vug carbonate reservoir profile control system has.
For the carbonatite profile control under the high temperature and high salinity condition, high to amendment temperature resistant antisalt performance requriements, conventional profile control system has at present: silicates, water glass class, polymer class.
For the oil field some oil wells, bury the deep-well temperature higher, adopt conventional profile control agent profile control to have many shortcomings:
(1) silicates: the profile control cost is higher, and the extended horizontal well operating risk is larger;
(2) water glass class: two-fluid process shutoff efficient is low, the de-plugging difficulty;
(3) polymer class: the temperature resistant antisalt poor performance, validity period is short, and the profile control cost is high.
For the problems referred to above: invented and utilized discarded slurry to prepare the method for Carbonate Reservoir profile control system, utilized discarded slurry to prepare the anti-salt (2.4 * 10 of heatproof (140 ℃)
5Mg/L) the profile control system is with low cost, and the system performance perameter satisfies Carbonate Reservoir profile control demand.
Chinese patent CN1781860 discloses " a kind of synthetic method of utilizing oil exploitation sludge to prepare body varicosity granular profile control agent ", and the oil exploitation sludge of originally discarding landfill has been prepared a kind of granular profile control agent.This patent polymkeric substance synthesis condition has limited the addition of greasy filth.
Chinese patent CN1976484 discloses " a kind of preparation method of crosslinking copolymerization type particulate state profile control amendment ", adopt acrylamide and two kinds of organic monomers of vinylformic acid as host, prepare crosslinking copolymerization particulate state amendment to add wilkinite or kaolin toughener.The patented product can not satisfy high temperature (140 ℃) high salinity (2.4 * 10
5Mg/L) environment service requirements.
Chinese patent CN1278547A discloses " profile control reservoir oil displacing agent ", comprises the multiple formulations combination, be organic or inorganic compound, and take inorganic as main, organic is auxiliary.This patent additive temperature resistant antisalt poor-performing.
Chinese patent CN1085590 discloses " a kind of water-pluging Polymer amendment ", it 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 commonly using.
Chinese patent CN101735782A " mud prepares the method for profile-controlling and plugging agent after utilizing oil field waste to process for raw material ", used medicament is conventional acrylamide monomer AM and catalyzer S-WAT, sodium bisulfite, synthesis technique is comparatively ripe, and product temperature resistant antisalt performance satisfies reservoir temperature profile control demand below 90 ℃.
Along with going deep into of water flooding, it is increasing that water filling breaks through well group, and water-injection efficiency descends gradually; For improving the carbonatite oil recovery factor, be badly in need of carrying out the profile control technology technical study; But at present conventional amendment have that cost is high, temperature resistant antisalt poor performance, the short shortcoming of validity period.In addition, produce a large amount of discarded slurries in the drilling process, such as direct landfill or solidification treatment, cause in various degree pollution to environment unavoidably.
Summary of the invention
The technical problem that the present invention solves is: a kind of method of utilizing discarded slurry to prepare the temperature resistant antisalt amendment for raw material is provided, has realized the discarded slurry recycling.
Specifically, the present invention is achieved through the following technical solutions:
A kind of temperature resistant antisalt amendment contains discarded slurry, mud curing agent, intensity modifier, dispersion agent, retardant and water.
Wherein, take discarded slurry weight as 100%, contain:
Mud curing agent 6-12 % by weight,
Intensity modifier 6-12 % by weight,
Dispersion agent 0.2-1.5 % by weight,
Retardant 0.02-0.15 % by weight, and
Water 6-12 % by weight.
Wherein, take discarded slurry weight as 100%, contain:
Mud curing agent 8-10 % by weight is preferably 9 % by weight,
Intensity modifier 8-10 % by weight is preferably 9 % by weight,
Dispersion agent 0.5-1 % by weight is preferably 0.8 % by weight,
Retardant 0.05-0.1 % by weight is preferably 0.08 % by weight, and
Water 8-10 % by weight is preferably 9 % by weight.
Wherein, the tolerable temperature of described amendment is more than 140 ℃, salinity is 2.4 * 10
5More than the mg/L.
Wherein, described intensity modifier is one or both in flyash or the water glass.
Wherein, described dispersion agent is selected from one or more in sulfonation tannin extract, 1-methyl amyl alcohol, Mierocrystalline cellulose, guar gum or the fatty acid polyglycol ester.
Wherein, described retardant is selected from Na
2In CO3, unslaked lime, slaked lime, calcium carbonate, borax, Sodium hexametaphosphate 99, sodium polyphosphate, alkaline phosphate or the ammonium phosphate one or more.
Wherein, described water is that salinity is 2.4 * 10
5The oilfield injection water that mg/L is above.
Wherein, described solidifying agent is selected from one or more of little silicon or cement.
Wherein, described discarded slurry is water-based mud, and density is 1.30-1.40g/cm
3
Described temperature resistant antisalt amendment prepares by the following method: take discarded slurry weight as reference, with the discarded slurry solidifying agent, intensity modifier, dispersion agent and retardant and water join in the discarded slurry, place 66-78 hour, can obtain the heatproof amendment.
Described temperature resistant antisalt amendment, prepare by the following method: take discarded slurry weight as reference, with the 6-12 % by weight, be preferably the discarded slurry solidifying agent of 8-10 % by weight, the 6-12 % by weight, the intensity modifier of preferred 8-10 % by weight, 0.2-1.5 % by weight, dispersion agent and the 0.02-0.15 % by weight of preferred 0.5-1 % by weight, retardant and the 6-12 % by weight of preferred 0.05-0.1 % by weight, the water of preferred 8-10 % by weight joins in the discarded slurry, places 66-78 hour.
The density of described temperature resistant antisalt amendment is 1.20～1.40g/cm
3Viscosity is 30～50mPa.s.
Wherein said amendment is more than 140 ℃ in temperature, and pressure is 75MPa when above, and solidification intensity is 0.3～5.0MPa, and be 48～72h set time, and dynamically the thickening time is more than 12h.
A kind of preparation method of described temperature resistant antisalt amendment, with the discarded slurry weighing scale, with the discarded slurry solidifying agent, intensity modifier, dispersion agent and retardant and water join in the discarded slurry, place and obtain the temperature resistant antisalt amendment after 66-78 hour.
A kind of preparation method of temperature resistant antisalt amendment, with the discarded slurry weighing scale, with the 6-12 % by weight, be preferably the discarded slurry solidifying agent of 8-10 % by weight, the 6-12 % by weight, the intensity modifier of preferred 8-10 % by weight, 0.2-1.5 % by weight, dispersion agent and the 0.02-0.15 % by weight of preferred 0.5-1 % by weight, retardant and the 6-12 % by weight of preferred 0.05-0.1 % by weight, the water of preferred 8-10 % by weight joins in the discarded slurry, places and obtains the temperature resistant antisalt amendment after 66-78 hour.
The application of discarded slurry in preparation temperature resistant antisalt amendment.
Wherein, the tolerable temperature of described heatproof amendment is more than 140 ℃, salinity is 2.4 * 10
5More than the mg/L.
By utilizing discarded slurry to prepare the technical scheme of temperature resistant antisalt amendment for raw material, must get a kind of temperature resistant antisalt profile control system that is suitable for the oil field carbonatite, for the research of technique of carbonatite profile control technology is laid a solid foundation, solve simultaneously the people's livelihood problem of rejected well drilling liquid (discarded slurry) contaminate environment, realizing utilization of waste as resource, is the technology of the high-level efficiency oil recovery of a high temperature and high salinity ultra deep well.
The invention provides a kind of method of utilizing the cheap temperature resistant antisalt carbonatite profile control system of discarded slurry preparation.Not only realized the recycling of discarded slurry, avoided the rejected well drilling liquid landfill and solidify the environmental pollution that causes, the more important thing is and invented a kind of anti-salt (2.4 * 10 of heatproof (140 ℃) that is suitable for the oil field fracture and vug carbonate reservoir
5Mg/L) profile control system is for the technical study of carbonatite profile control technology is laid a solid foundation.
The present invention obtains the temperature resistant antisalt amendment and has following advantage:
(1) density is adjustable: 1.20～1.40g/cm
3
(2) temperature is little to viscosity influence: 30～50mPa.s;
(3) good injection: the wellbore environment system viscosity is stable, and the cementing truck group can satisfy the infusion requirement;
(4) dynamically maintenance of high temperature (140 ℃) high pressure (75MPa): not multiviscosisty of＞12h;
(5) solidification intensity is adjustable: the static maintenance of high temperature (140 ℃) high pressure (75MPa), solidification intensity 0.3～5.0MPa;
(6) set time is controlled: the static maintenance of high temperature (140 ℃) high pressure (75MPa), and set time, 48～72h was adjustable;
(7) temperature resistant antisalt excellent performance: satisfy 140 ℃ of system in Tahe Oilfield, 2.4 * 10
5Profile control demand under the mg/L salinity condition.
Description of drawings
Fig. 1 is the dynamic multiviscosisty curve of the amendment of embodiment 1.
Fig. 2 is the dynamic multiviscosisty curve of the amendment of embodiment 2.
Fig. 3 is the dynamic multiviscosisty curve of the amendment of embodiment 3.
Fig. 4 is the dynamic multiviscosisty curve of the amendment of embodiment 4.
Fig. 5 is the dynamic multiviscosisty curve of the amendment of embodiment 5.
Fig. 6 is the quiet gelling curve of the amendment of embodiment 1.
Fig. 7 is the quiet gelling curve of the amendment of embodiment 2.
Fig. 8 is the quiet gelling curve of the amendment of embodiment 3.
Fig. 9 is the quiet gelling curve of the amendment of embodiment 4.
Figure 10 is the quiet gelling curve of the amendment of embodiment 5.
Embodiment
For proving absolutely technical problem solved by the invention and the technique effect that reaches, the present invention is described in detail by following embodiment and embodiment.
The invention provides a kind of temperature resistant antisalt amendment, wherein contain discarded slurry; Preferably, also further contain, take discarded slurry weight as reference variable, mud curing agent 6-12 % by weight, be preferably the 8-10 % by weight, intensity modifier 6-12 % by weight, preferred 8-10 % by weight, dispersion agent 0.2-1.5 % by weight, preferred 0.5-1 % by weight, retardant 0.02-0.15 % by weight, preferred 0.05-0.1 % by weight, water 6-12 % by weight, preferred 8-10 % by weight.In the environment that described amendment uses, temperature can reach more than 140 ℃, salinity reaches 2.4 * 10
5More than the mg/L.Described discarded slurry is water-based mud, and density is 1.30～1.40g/cm
3, be the mud that comes from the oil gas well drilling process, contain certain crude oil, metal ion, remaining chemical agent and some mineral substance, it is generally acknowledged the crude oil that contains, crude content is 0.5-1.5%; Metal ion mainly is Ca
2+, Mg
2+, metallic ions Ca
2+, Mg
2+Content be respectively 10000-12000mg/L, 900-1000mg/L; Organic content is 7%-10%, and organic components comprises carboxymethyl cellulose, polyacrylamide, and the organic compound such as polymeric alcohol are 90%-93% such as inorganic content, the inorganics composition comprises chip, detailed catalogue calcium carbonate, ferric sulfate and mineral salt.Described intensity modifier is flyash, water glass, (silica content is about 48% as main take silicon-dioxide and aluminium sesquioxide for described flyash Chemical Composition, alumina content is about 27%), other composition is that ferric oxide, calcium oxide, magnesium oxide, potassium oxide, sodium oxide, sulphur trioxide and uncombusted are organic.Described dispersion agent is sulfonation tannin extract, methyl amyl alcohol, Mierocrystalline cellulose, guar gum, fatty acid polyglycol ester; The main component of described sulfonation tannin extract is tannin, and tannin content is＞80%.Described retardant is Na
2CO
3, unslaked lime, slaked lime, calcium carbonate, borax, Sodium hexametaphosphate 99, sodium polyphosphate, alkaline phosphate and ammonium phosphate.Wherein said water can be oilfield injection water.Salinity is 2.4 * 10
5More than the mg/L.Described solidifying agent is little silicon, detailed catalogue cement, and the main chemical compositions of little silicon is SiO
2, content can reach 85-95%, and other compositions comprise Fe
2O
3, Al
2O
3, CaO, K
2O, Na
2O, MgO, C etc.; Detailed catalogue cement particle diameter is the 300-500 order.Described a kind of temperature resistant antisalt amendment, prepare by the following method: take discarded slurry weight as reference, discarded slurry solidifying agent with 8～10%, 8～10% intensity modifier, 0.5～1% dispersion agent and 0.05～0.1% retardant and 8～10% water join in the discarded slurry, place 66-78 hour.The density of described amendment is 1.20～1.40g/cm
3Viscosity is 30～50mPa.s.Wherein said amendment is more than 140 ℃ in temperature, and pressure is 75MPa when above, and solidification intensity is 0.3～5.0MPa, and be 48～72h scope set time, and can regulate set time, places not multiviscosisty more than the 12h.
The present invention also provides a kind of preparation method of temperature resistant antisalt amendment, comprise take discarded slurry weight as reference, discarded slurry solidifying agent with 8～10%, 8～10% intensity modifier, 0.5 water joins in the discarded slurry after～1% dispersion agent and 0.05～0.1% retardant and 8～10% oilfield treatments, places and obtains the temperature resistant antisalt amendment after 66-78 hour.
Specifically, in a kind of embodiment, amendment of the present invention and preparation method thereof is as follows:
Directly utilize the discarded slurry (water base) that reclaims, take discarded slurry weight as reference variable, add 8～10% discarded slurry solidifying agent, 8～10% intensity modifier, water after 0.5～1% dispersion agent and 0.5～0.1% retardant and 8～10% oilfield treatments.Directly add in the discarded slurry, normal temperature is placed 72h without the multiviscosisty phenomenon, and on-the-spot directly configuration is for subsequent use.
Described discarded slurry: the on-the-spot water-based mud that directly reclaims after being mixed evenly, density 1.30～1.40g/cm
3
Described solidifying agent is little silicon;
Described intensity modifier is flyash;
Described dispersion agent is that sulfonation is burned;
Described retardant is Na
2CO
3
Water is oilfield injection water after the described oilfield treatments, and salinity is 2.4 * 10
5Mg/L.
Embodiment
Set forth the present invention below by specific embodiment, one skilled in the art will appreciate that this should not be understood to the restriction to claim protection domain of the present invention.
The below is described as follows reagent and the measuring method that the present invention uses:
Raw material used among the embodiment all is raw materials of buying from conventional commercially available except specified otherwise.
Among the following embodiment during product analysis used amendment preparation method, determinator and measuring method be described as follows all with reference to GB/T 19139-2003 oil-well cement test method:
Density measuring device and method: adopt the fluid under pressure densometer, measure according to the 6th cement slurry density method for measuring in the GB/T 19139-2003 oil-well cement test method.
The measuring method of viscosity: use the high pressure viscosity meter according in the GB/T 19139-2003 oil-well cement test method in the 12.4th the measuring method of rheological property measure.
Multiviscosisty measuring method: according to the method for the 9th oil well simulation thickening time test in the GB/T 19139-2003 oil-well cement test method, under reservoir temperature, pressure, adopt the High Temperature High Pressure multiviscosity meter to measure.
Static set time measuring method: adopt 50.8mm * 50.8mm * 50.8mm standard die trial, (140 ℃ of High Temperature High Pressure maintenances, 75MPa), whether fully every interval 12h takes out and investigates curing, and maintenance process is according to the 7th oil well simulation compressive strength test in the GB/T 19139-2003 oil-well cement test method.
The mensuration of static maintenance solidification intensity: adopt DFC-0720 type compression strength investigation instrument to measure.
The mensuration of gelling curve: adopt MODEL5265 type ultrasonic wave static gel strength analyser to measure.
The dynamic maintenance thickening time: adopt DFC-0710B type normal temperature and pressure multiviscosity meter to measure.
With the density 1.30g/cm that produces in the system in Tahe Oilfield oil gas well drilling process
3Discarded slurry 1000g(wherein composition be that crude oil 0.5%, metal ion mainly are Ca
2+, Mg
2+, content is respectively 11100mg/L, 930mg/L; Organic content is 8.8%, and inorganic content is 91.2%, and the inorganics composition comprises chip, detailed catalogue calcium carbonate, ferric sulfate and mineral salt.Join in the arm stirrer, take this discarded slurry weight as 100%, as the discarded slurry solidifying agent, the flyash of 6 % by weight is as intensity modifier with little silicon of 6 % by weight, and 0.2% sulfonation tannin extract is as dispersion agent, 0.15% Na
2CO
3Directly join in the discarded slurry as water after the oilfield treatments of retardant and 12%, make mixing solutions and obtain amendment 1
#, this amendment to be placed 66h at normal temperatures do not find the multiviscosisty phenomenon, the density of working sample, viscosity, static maintenance solidification intensity, static maintenance set time, dynamic maintenance thickening time, measurement result sees Table 1.At 140 ℃, pressure is to measure the multiviscosisty curve under the condition of 75Mpa to see Fig. 1 with this sample; At 140 ℃, pressure is to measure quiet gelling curve under the condition of 25Mpa to see Fig. 6 with this sample.
With the density 1.32g/cm that produces in the system in Tahe Oilfield oil gas well drilling process
3Discarded slurry 1000g(wherein composition be that crude oil 1.5%, metal ion mainly are Ca
2+, Mg
2+, content is respectively 10000mg/L, 900mg/L; Organic content is 7%, and inorganic content is 93%, and the inorganics composition comprises chip, detailed catalogue calcium carbonate, ferric sulfate and mineral salt.Join in the arm stirrer, take this discarded slurry weight as 100%, as the discarded slurry solidifying agent, the flyash of 8 % by weight is as intensity modifier with little silicon of 8 % by weight, and 0.5% sulfonation tannin extract is as dispersion agent, 0.05% Na
2CO
3Directly join in the discarded slurry as water after the oilfield treatments of retardant and 10%, make mixing solutions and obtain amendment 2
#, this amendment to be placed 70h at normal temperatures do not find the multiviscosisty phenomenon, the density of working sample, viscosity, static maintenance solidification intensity, static maintenance set time, dynamic maintenance thickening time, measurement result sees Table 1.At 140 ℃, pressure is to measure the multiviscosisty curve under the condition of 75Mpa to see Fig. 2 with this sample; At 140 ℃, pressure is to measure quiet gelling curve under the condition of 25Mpa to see Fig. 7 with this sample.
Embodiment 3
With the density 1.35g/cm that produces in the system in Tahe Oilfield oil gas well drilling process
3Discarded slurry 1000g(wherein composition be that crude oil 1.0%, metal ion mainly are Ca
2+, Mg
2+, content is respectively 12000mg/L, 1000mg/L; Organic content is 10%, and inorganic content is 90%, and the inorganics composition comprises chip, detailed catalogue calcium carbonate, ferric sulfate and mineral salt.Join in the arm stirrer, take this discarded slurry weight as 100%, as the discarded slurry solidifying agent, the flyash of 9 % by weight is as intensity modifier with little silicon of 9 % by weight, and 0.8% sulfonation tannin extract is as dispersion agent, 0.08% Na
2CO
3Directly join in the discarded slurry as water after the oilfield treatments of retardant and 9%, make mixing solutions and obtain amendment 3
#, this amendment to be placed 72h at normal temperatures do not find the multiviscosisty phenomenon, the density of working sample, viscosity, static maintenance solidification intensity, static maintenance set time, dynamic maintenance thickening time, measurement result sees Table 1.At 140 ℃, pressure is to measure the multiviscosisty curve under the condition of 75Mpa to see Fig. 3 with this sample; At 140 ℃, pressure is to measure quiet gelling curve under the condition of 25Mpa to see Fig. 8 with this sample.
With the density 1.38g/cm that produces in the system in Tahe Oilfield oil gas well drilling process
3Discarded slurry 1000g(wherein composition be that crude oil 0.8%, metal ion mainly are Ca
2+, Mg
2+, metal ion content is respectively 11500mg/L, 960mg/L; Organic content is 8%, and inorganic content is 92%, and the inorganics composition comprises chip, detailed catalogue calcium carbonate, ferric sulfate and mineral salt.Join in the arm stirrer, take this discarded slurry weight as 100%, as the discarded slurry solidifying agent, the flyash of 10 % by weight is as intensity modifier with little silicon of 10 % by weight, and 1% sulfonation tannin extract is as dispersion agent, 0.1% Na
2CO
3Directly join in the discarded slurry as water after the oilfield treatments of retardant and 8%, make mixing solutions and obtain amendment 4
#, this amendment to be placed 75h at normal temperatures do not find the multiviscosisty phenomenon, the density of working sample, viscosity, static maintenance solidification intensity, static maintenance set time, dynamic maintenance thickening time, measurement result sees Table 1.At 140 ℃, pressure is to measure the multiviscosisty curve under the condition of 75Mpa to see Fig. 4 with this sample; At 140 ℃, pressure is to measure quiet gelling curve under the condition of 25Mpa to see Fig. 9 with this sample.
With the density 1.40g/cm that produces in the system in Tahe Oilfield oil gas well drilling process
3Discarded slurry 1000g(wherein composition be that crude oil 1.3%, metal ion mainly are Ca
2+, Mg
2+, content is respectively 10800mg/L, 980mg/L; Organic content is 7.8%, and inorganic content is 92.2%, and the inorganics composition comprises chip, detailed catalogue calcium carbonate, ferric sulfate and mineral salt.Join in the arm stirrer, take this discarded slurry weight as 100%, as the discarded slurry solidifying agent, the flyash of 12 % by weight is as intensity modifier with little silicon of 12 % by weight, and 1.5% sulfonation tannin extract is as dispersion agent, 0.02% Na
2CO
3Directly join in the discarded slurry as water after the oilfield treatments of retardant and 6%, make mixing solutions and obtain amendment 5
#, this amendment to be placed 78h at normal temperatures do not find the multiviscosisty phenomenon, the density of working sample, viscosity, static maintenance solidification intensity, static maintenance set time, dynamic maintenance thickening time, measurement result sees Table 1.At 140 ℃, pressure is to measure the multiviscosisty curve under the condition of 75Mpa to see Fig. 5 with this sample; At 140 ℃, pressure is to measure quiet gelling curve under the condition of 25Mpa to see Figure 10 with this sample.
The parameters result of the amendment of table 1 embodiment 1-5 preparation
Can find out by upper table 1 data, the density of the amendment of embodiment 1-5 preparation is at 1.30-1.40g/cm
3Have wider scope, can regulate; Viscosity is about 50mPa.s, and all in the 40-60mPa.s scope, temperature influence is less; Static maintenance solidification intensity is greater than 0.5MPa, and in the 0.5-3.2MPa scope, solidification intensity is adjustable; In the 24-52h scope, set time is controlled more than 24h set time for static maintenance; The dynamic oxidation thickening time meets the requirement of temperature resistant antisalt amendment all greater than 2h.
Amendment high-temperature sample high pressure multiviscosisty curve from Fig. 1-shown in Figure 5.X-coordinate be time shaft (hour), ordinate zou be respectively temperature (℃), pressure (MPa), viscosity (mPa.s).Investigate 140 ℃ of temperature, investigate pressure 75MPa, the increasing temperature and pressure time is set as 2h.Experimental installation adopts the High Temperature High Pressure multiviscosity meter.By the dynamic multiviscosisty curve of 24h as seen, 12h is basicly stable below 50mPa.s with interior slurry denseness, particularly between the 30-40mPa.s, illustrates that amendment of the present invention has good infusion performance, can guarantee construction injection safety.
The quiet gelling curve of amendment high-temperature sample high pressure from Fig. 6-shown in Figure 10.X-coordinate be time shaft (hour), ordinate zou be respectively temperature (℃), pressure (MPa), intensity (MPa).Investigate 140 ℃ of temperature, investigate pressure 25MPa, the increasing temperature and pressure time is set as 1h.Experimental installation adopts quiet gelling determinator.By the quiet gelling curve of 60h as seen, 24h intensity can reach more than the 0.3MPa, particularly between the 0.6-2.8MPa, illustrates that blocking agent of the present invention has good curing characteristics, and the formation condition plugging strength is high.
Claims (16)
1. a temperature resistant antisalt amendment contains discarded slurry, mud curing agent, intensity modifier, dispersion agent, retardant and water.
2. temperature resistant antisalt amendment as claimed in claim 1, take discarded slurry weight as 100%, contain:
Mud curing agent 6-12 % by weight,
Intensity modifier 6-12 % by weight,
Dispersion agent 0.2-1.5 % by weight,
Retardant 0.02-0.15 % by weight, and
Water 6-12 % by weight.
3. temperature resistant antisalt amendment as claimed in claim 2, take discarded slurry weight as 100%, contain:
Mud curing agent 8-10 % by weight is preferably 9 % by weight,
Intensity modifier 8-10 % by weight is preferably 9 % by weight,
Dispersion agent 0.5-1 % by weight is preferably 0.8 % by weight,
Retardant 0.05-0.1 % by weight is preferably 0.08 % by weight, and
Water 8-10 % by weight is preferably 9 % by weight.
4. such as each described temperature resistant antisalt amendment of claim 1-3, the tolerable temperature of wherein said amendment is more than 140 ℃, salinity is 2.4 * 10
5More than the mg/L.
5. such as each described temperature resistant antisalt amendment of claim 1-4, wherein said intensity modifier is one or both in flyash or the water glass.
6. such as each described temperature resistant antisalt amendment of claim 1-5, wherein said dispersion agent is selected from one or more in sulfonation tannin extract, 1-methyl amyl alcohol, Mierocrystalline cellulose, guar gum or the fatty acid polyglycol ester.
7. such as each described temperature resistant antisalt amendment of claim 1-6, wherein said retardant is selected from Na
2In CO3, unslaked lime, slaked lime, calcium carbonate, borax, Sodium hexametaphosphate 99, sodium polyphosphate, alkaline phosphate or the ammonium phosphate one or more.
8. such as each described temperature resistant antisalt amendment of claim 1-7, wherein said water is that salinity is 2.4 * 10
5The oilfield injection water that mg/L is above.
9. such as each described temperature resistant antisalt amendment of claim 1-8, wherein said solidifying agent is selected from one or more of little silicon or cement.
10. such as each described temperature resistant antisalt amendment of claim 1-9, wherein said discarded slurry is water-based mud, and density is 1.30-1.40g/cm
3
11. such as each described temperature resistant antisalt amendment of claim 1-10, prepare by the following method: take discarded slurry weight as reference, with the discarded slurry solidifying agent, intensity modifier, dispersion agent and retardant and water join in the discarded slurry, placed 66-78 hour, and can obtain the heatproof amendment.
12. such as each described temperature resistant antisalt amendment of claim 1-11, the density of wherein said amendment is 1.20～1.40g/cm
3Viscosity is 30～50mPa.s.
13. such as each described temperature resistant antisalt amendment of claim 1-12, wherein said amendment is more than 140 ℃ in temperature, pressure is 75MPa when above, and solidification intensity is 0.3～5.0MPa, and be 48～72h set time, and dynamically the thickening time is more than 12h.
14. the preparation method of each described temperature resistant antisalt amendment of claim 1-13, it is characterized in that, with the discarded slurry weighing scale, with the discarded slurry solidifying agent, intensity modifier, dispersion agent and retardant and water join in the discarded slurry, place and obtain the temperature resistant antisalt amendment after 66-78 hour.
15. the application of discarded slurry in preparation temperature resistant antisalt amendment.
16. the as claimed in claim 15 application of discarded slurry, the tolerable temperature of wherein said heatproof amendment are more than 140 ℃, salinity is 2.4 * 10
5More than the mg/L.
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| CN108048063A (en) * | 2017-12-23 | 2018-05-18 | 天津吉诺达科技开发有限公司 | A kind of profile control agent prepared with offshore drilling platform discarded slurry |
| CN115491185A (en) * | 2022-08-08 | 2022-12-20 | 成都与盛能源科技股份有限公司 | Plugging material, plugging drilling fluid, preparation method of plugging drilling fluid and plugging method |
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