Summary of the invention
The object of the present invention is to provide a kind of adjusting driving agnet based on breaking glue solution, its surface tension is lower, effectively can reduce oil water interfacial tension, improves oil recovery factor.
Second object of the present invention is the preparation method providing above-mentioned adjusting driving agnet.
First technical scheme of the present invention, based on the adjusting driving agnet of breaking glue solution, comprising weight percent is the breaking glue solution of 0.1%-0.4% and the cosurfactant of 0.004%-0.01%, and all the other are oilfield injection water.
Above-mentioned cosurfactant is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether.
What above-mentioned breaking glue solution referred to that a kind of pressure break of being added in crude oil, kerosene, water and ethanol by viscous water clean fracturing fluid breaks glue returns the supernatant liquor of discharge opeing after sedimentation filtration.
Above-mentioned viscous water clean fracturing fluid refers to the clean fracturing fluid be made up of viscoelastic surfactant; Described viscoelastic surfactant refers to one or more in chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine, cocounut oil acid amide trimethyl-glycine.
Second technical scheme of the present invention, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
Step 1, reclaims the breaking glue solution of the row of returning;
Step 2, adds cosurfactant and oilfield injection water in the breaking glue solution reclaimed, and the obtained adjusting driving agnet of mixing, the weight percent of each component is breaking glue solution 0.1%-0.4%, cosurfactant 0.004%-0.01%, and all the other are oilfield injection water.
The particle size distribution range of above-mentioned adjusting driving agnet is 600nm-800nm.
The present invention has following beneficial effect:
1, adjusting driving agnet of the present invention utilizes breaking glue solution and on-the-spot oilfield injection water as raw material, and not only effectively reclaimed the breaking glue solution of the row of returning, material is easy to get, utilization of waste material, and its surface tension is lower.Cosurfactant in adjusting driving agnet and breaking glue solution produce and act synergistically, and can reduce interfacial tension between profit, increase substantially displacement efficiency;
2, adjusting driving agnet of the present invention has the displacement of reservoir oil and profile control function concurrently, and the interfacial tension between adjusting driving agnet and crude oil can be reduced to 10-3-10-4mNm-1, have good emulsifying property, heat-resistant salt-resistant performance, dynamic adsorbance is less than 2mg/g.By reducing interfacial tension between profit, wettability reversal, emulsified crude oil, blocking high permeability band, improving the mechanism such as sweep efficiency, oil recovery factor can be made to improve more than 8%;
3, the preparation method of adjusting driving agnet of the present invention utilizes the breaking glue solution of the row of returning and on-the-spot oilfield injection water to make adjusting driving agnet, this adjusting driving agnet directly can inject water injection well, enter oil well through water injection well to have an effect, make the recovery of breaking glue solution, the preparation of adjusting driving agnet and use integration, not only reduce environmental protection pressure, reduce treatment cost of waste liquor, and improve utilization ratio and the use value of breaking glue solution, there is very high economic benefit and social benefit.
Embodiment
Embodiment 1, based on the adjusting driving agnet of breaking glue solution, comprising weight percent is the breaking glue solution of 0.1%-0.4% and the cosurfactant of 0.004%-0.01%, and all the other are oilfield injection water.
Cosurfactant in this adjusting driving agnet and viscous water clean fracturing fluid breaking glue solution produce and act synergistically, and surface tension is lower, can reduce interfacial tension between profit, increase substantially displacement efficiency, improve oil recovery factor.
Embodiment 2, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.25%, the cosurfactant of 0.006%, and all the other are on-the-spot injection water, and cosurfactant is Sodium dodecylbenzene sulfonate.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
Cosurfactant and the viscous water clean fracturing fluid breaking glue solution of the adjusting driving agnet of the present embodiment can produce stronger synergy, have good emulsifying property, heat-resistant salt-resistant performance.Cosurfactant is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether, and raw material is easy to get, alternative strong.
Embodiment 3, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.1%, the cosurfactant of 0.004%, and all the other are on-the-spot injection water, and cosurfactant is polyoxyethylene nonylphenol ether.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that sodium laurylsulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
The cosurfactant of the present embodiment adjusting driving agnet and breaking glue solution produce stronger synergy, effectively can reduce oil water interfacial tension, have good emulsifying property, heat-resistant salt-resistant performance.
Embodiment 4, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.4%, the cosurfactant of 0.01%, and all the other are on-the-spot inject water or local water, and cosurfactant is that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that sodium laurylsulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
The adjusting driving agnet of the present embodiment has good emulsifying property, heat-resistant salt-resistant performance, and dynamic adsorbance is less than 2mg/g.
Embodiment 5, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.2%, the cosurfactant of 0.008%, and all the other are on-the-spot inject water or local water, and cosurfactant is that sodium laurylsulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Adjusting driving agnet of the present invention and length6interfacial tension between crude oil can reach 10-3mNm-1, have good emulsifying property, heat-resistant salt-resistant performance, dynamic adsorbance is less than 2mg/g.
This adjusting driving agnet surface tension is low, can effectively reduce interfacial tension between profit, improves sweep efficiency.
Embodiment 6, on the basis of embodiment 1, in the present embodiment, breaking glue solution be add that crude oil fracturing breaks glue by viscous water clean fracturing fluid return the supernatant liquor of discharge opeing after sedimentation filtration.
Breaking glue solution also can be add that kerosene, water or ethanol pressure break break glue by viscous water clean fracturing fluid return the supernatant liquor of discharge opeing after sedimentation filtration.
Viscous water clean fracturing fluid refers to the clean fracturing fluid be made up of viscoelastic surfactant; Viscoelastic surfactant refers to a kind of, the combination of two kinds, three kinds, four kinds in chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine, cocounut oil acid amide trimethyl-glycine, also can be the combination of chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine and cocounut oil acid amide trimethyl-glycine, the ratio of each component be arbitrarily than.
The breaking glue solution that the present embodiment adjusting driving agnet is formed after adopting viscous water clean fracturing fluid pressure break, is conducive to environment protection, and adopts the supernatant liquor after breaking glue solution precipitation; excellent property; interfacial tension between profit can be reduced further, improve displacement efficiency, and then improve oil recovery factor.
Embodiment 7, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
(1) get 5mL clean fracturing fluid viscosifying agent G9 to add in 100g water, stir 1min rapidly, namely crosslinkable obtains viscous water clean fracturing fluid; In the viscous water clean fracturing fluid obtained, add 2mL kerosene stir, in 60 DEG C of water-baths, leave standstill 5h break glue, obtain breaking glue solution, breaking glue solution viscosity is less than 5mPas.
(2) in the breaking glue solution obtained, add cosurfactant Sodium dodecylbenzene sulfonate and local water, obtain adjusting driving agnet.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The present embodiment adopts Changqing oilfields Ansai long6reservoir formation water preparation adjusting driving agnet, wherein breaking glue solution accounts for 0.3%, and cosurfactant accounts for 0.01%, and surplus is local water.
The technical feature of this adjusting driving agnet is as shown in table 1:
Table 1 is based on the adjusting driving agnet performance of the breaking glue solution of viscous water clean fracturing fluid G9
The present embodiment adopts the breaking glue solution of the row of returning to be that adjusting driving agnet made by raw material, effectively make use of breaking glue solution, and obtained adjusting driving agnet excellent property, for oil recovering, interfacial tension between profit can be reduced further, improve displacement efficiency, improve oil recovery factor.
Embodiment 8, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
(1) get 5mL clean fracturing fluid viscosifying agent G5 to add in 100g water, stir 1min rapidly, namely crosslinkable obtains viscous water clean fracturing fluid.Then add 2mL ethanol wherein to stir, in 80 DEG C of water-baths, leave standstill 5h break glue, can obtain breaking glue solution, breaking glue solution viscosity is less than 5mPas.Also ethanol can be replaced with water.
(2) in breaking glue solution, cosurfactant Sodium dodecylbenzene sulfonate is added and Changqing oilfields Ansai is long6reservoir formation water, obtains adjusting driving agnet.Wherein breaking glue solution accounts for 0.1%, and cosurfactant accounts for 0.005%, and surplus is local water.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
Should be as shown in table 2 based on the technical feature of clean fracturing fluid viscosifying agent G5 of the fracturing fluid breaking glue solution adjusting driving agnet:
Table 2 is based on the breaking glue solution adjusting driving agnet performance of viscous water clean fracturing fluid G5
The adjusting driving agnet that the present embodiment is made, its surface tension is lower, can reduce interfacial tension between profit further, improves displacement efficiency, makes the recovery ratio of crude oil improve 10.04%.
Embodiment 9, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
(1) pressure is split on-the-spot pressure break and is broken glue construction and terminate the breaking glue solution that row is returned at rear scene, and indoor employing Medium speed filter paper filters, and obtains lower clear liquid and is breaking glue solution.
(2) in breaking glue solution, cosurfactant Sodium dodecylbenzene sulfonate is added and Changqing oilfields Ansai is long6reservoir formation water, mixing, obtains adjusting driving agnet.Wherein breaking glue solution content is 0.3%, and cosurfactant content is 0.01%, and surplus is local water.
This technical feature returning the breaking glue solution adjusting driving agnet of row based on scene is as shown in table 3:
Table 3 returns the adjusting driving agnet performance of the breaking glue solution of row based on scene
The adjusting driving agnet that the present embodiment is obtained, effectively can improve oil recovering, makes oil recovery factor improve 9.04%.
Embodiment 10, on the basis of embodiment 9, in the present embodiment, the weight percent of each component is the breaking glue solution of 0.25%, the cosurfactant of 0.006%, and all the other are on-the-spot injection water, and cosurfactant is polyoxyethylene nonylphenol ether.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The cosurfactant of the present embodiment is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether, and raw material is easy to get, and cost is low, and adjusting driving agnet excellent property.
Embodiment 11, on the basis of embodiment 9, in the present embodiment, the per-cent of each component is the breaking glue solution of 0.1%, the cosurfactant of 0.004%, all the other are on-the-spot inject water, and cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The present embodiment adjusting driving agnet not only excellent property, makes oil water interfacial tension reduce, and can block macropore and crack, the matrix sillar forcing oil-displacing agent to enter not involve, start surplus oil wherein, improve the sweep efficiency of oil-displacing agent, can oil recovery factor be increased substantially.
Embodiment 12, on the basis of embodiment 9, in the present embodiment, the per-cent of each component is: the breaking glue solution of 0.4%, the cosurfactant of 0.01%, all the other are on-the-spot inject water or local water, and cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
The present embodiment adjusting driving agnet surface tension is lower, for oil recovering, can increase substantially oil recovery factor.
Embodiment 13, based on the preparation method of the adjusting driving agnet of breaking glue solution, its technical process and for improve oil recovery factor technique see Fig. 1, comprise the following steps:
1) viscous water clean fracturing fluid 1 through truck-mounted blender 3 by fracturing truck 4 pressurize inject oil well 5, oil reservoir is pressed off, formed crack; Then the viscous water clean fracturing fluid 1 with propping agent 2 is injected the crack pressed off.Construction terminates rear closing well 1-2 hour, waits for viscous water clean fracturing fluid completely broken glue in the earth formation.
2), after viscous water clean fracturing fluid breaks glue in the earth formation completely, drive a well open flow 8 breaking glue solution, and breaking glue solution returns and ejects from oil well 5.
3) breaking glue solution 9 of the row of returning is filtered after 10 through desanding, carry out Concentration Testing 11, measuring the breaking glue solution concentration obtained is 0.3%, calculate the content of breaking glue solution, be the breaking glue solution of 0.25%, the cosurfactant of 0.006% according to weight percent, all the other ratios for on-the-spot injection water add cosurfactant 12 and oilfield injection water, obtain adjusting driving agnet 13.
4) adjusting driving agnet 13 is for improving oil recovery factor, is specially, and adjusting driving agnet 13 is entered note 27-48# water injection well 7 through waterflood pump 14 and waterflood-transmission line 17, and waterflood pump 14 is provided with under meter 15 and tensimeter 16.Adjusting driving agnet 13 enters oil well 5 through water injection well 7, changes the rock surface of oleophylic in oil well 5 into slightly water-wet surface, reduces capillary force, activation residual crude oil, and extraction crude oil, adding of adjusting driving agnet 13, improves oil recovery factor; In adjusting driving agnet 13, the weight percent of each component is breaking glue solution 0.1%-0.4%, cosurfactant 0.004%-0.01%, and all the other are oilfield injection water.
5) the corresponding three mouthfuls of oil wells 5 of 27-48# water injection well 7, are respectively 28-48#, 28-49#, 27-49#, record oil well day water ratio, day petroleum production, the track record cycle reaches 1-12 month.By producing the change of aquatic products oil mass before and after metering measure, calculating oil recovery factor increment, investigating the effect of this adjusting driving agnet.Before and after this adjusting driving agnet uses, effect comparison data are as shown in table 4.
Effect comparison before and after table 4 adjusting driving agnet uses
In the present embodiment, cosurfactant is polyoxyethylene nonylphenol ether.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The present embodiment utilizes the breaking glue solution of the row of returning and on-the-spot oilfield injection water to make adjusting driving agnet, this adjusting driving agnet directly can inject water injection well, enter oil well through water injection well to have an effect, make the recovery of breaking glue solution, the preparation of adjusting driving agnet and use integration, not only reduce environmental protection pressure, reduce treatment cost of waste liquor, and improve utilization ratio and the use value of breaking glue solution, there is very high economic benefit and social benefit.
The embodiment of the present invention adopts clean fracturing fluid viscosifying agent G9 and G5 two kinds of systems.Breaking glue solution adopts and adds gel breaker as the breaking glue solution after the broken glue such as kerosene, water, ethanol, crude oil by viscous water clean fracturing fluid, effectively can destroy the micellar structure of viscous water clean fracturing fluid, thus reduce of the fracturing fluid viscosity.
Cosurfactant in adjusting driving agnet of the present invention can produce with breaking glue solution and act synergistically, and after adjusting driving agnet enters oil well, can change the rock surface of oleophylic into slightly water-wet surface, make interfacial tension between profit be reduced to 10-3-10-4mNm-1, improve displacement efficiency, reduce capillary force, activation surplus oil; Simultaneously oil-displacing agent particle can block macropore and crack, and the matrix sillar forcing oil-displacing agent to enter not involve, starts surplus oil wherein, improve the sweep efficiency of oil-displacing agent.Adjusting driving agnet of the present invention has displacement of reservoir oil advantage integrated with transfer drive concurrently, contributes to increasing substantially oil recovery factor.