CN101423755A - Formula of gas well water blocking damage treating agent - Google Patents
Formula of gas well water blocking damage treating agent Download PDFInfo
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- CN101423755A CN101423755A CNA2008102317487A CN200810231748A CN101423755A CN 101423755 A CN101423755 A CN 101423755A CN A2008102317487 A CNA2008102317487 A CN A2008102317487A CN 200810231748 A CN200810231748 A CN 200810231748A CN 101423755 A CN101423755 A CN 101423755A
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Abstract
The invention belongs to a fracturing fluid additive, and in particular relates to a formulation of a gas-well water-lock damage treating agent. The formulation is characterized in that the treating agent is formed by matching the following components in weight percentage: 20.0 to 25.0 percent of benzyltributylammonium bromide or benzyltributylammonium chloride as a main agent, 2.0 to 5.0 percent of polyoxyethylene nonyl phenyl ether or sucrose fatty acid ester as nonionic surfactant, 0.5 to 1.0 percent of SR18Y fluorocarbon surfactant produced by Shaanxi Senrui Science and Technology Co., Ltd, 12.0 to 15.0 percent of dodecyl benzyl dimethyl ammonium chloride or hexadecyl trimethyl ammonium bromide as cationic surfactant, and the balance being distilled water. The gas-well water-lock damage treating agent prepared according to the formulation has the advantages of reducing gas-well water-lock damage, lowering starting pressure, improving the gas phase permeability of rock cores and protecting reservoirs.
Description
Technical field
The invention belongs to the fracturing fluid additive prescription, particularly a kind of gas well water blocking damage that reduces reduces trigger pressure, improves core gas-phase permeation rate, the formula of gas well water blocking damage treating agent of protection reservoir.
Background technology
Water blocking damage has a strong impact on the gas reservoir development effect, become one of main injury of hyposmosis tight gas reservoir, be in particular in to hinder and in time find and accurately estimate gas-bearing formation, increase operating cost, reduce gas recovery factor, slow down development process, in the payback period of the prolongation etc.
Water blocking damage degree and reservoir pore throat size and distribution, the reservoir rate of permeation, outside fluid is relevant with factors such as rock applied pressure and time, original water saturation, reservoir pressure, contact angle and fluid viscosities.For low permeability reservoir, along with permeability reduction, reduce though under equal pressure reduction, enter the amount of the outside fluid of reservoir, capillary radius reduces, and the self-priming effect increases, and more difficult the returning of this part Absorb Water ejects.If add reservoir low pressure, the water blocking damage degree just significantly increases, but after permeability reduction was arrived to a certain degree, in the time of can not making outside fluid enter the stratum by the self-priming effect, the water blocking damage degree can reduce again.
The water lock comprises movable water water lock and irreducible water water lock two portions, and moving part can be able to the part releasing by improving the fracturing fluid recovery (backflow) rate.Irreducible water has only by improving the fracturing liquid prescription to be subdued, and uses aqueous fracturing fluid, and the water lock is inevitable.Its influence factor mainly contains wettability, capillary pressure and the original water saturation of rock surface.The rock wetting ability is strong more, and reservoir potential water blocking damage is serious more.For gas field, big ox ground, the water blocking damage experimental result shows that the reservoir water blocking damage is serious, and the injury rate is at 69.0%-96.3%, and on average injury rate is 82.7%.
Summary of the invention
The purpose of this invention is to provide a kind of formula of gas well water blocking damage treating agent, can reduce trigger pressure, improve core gas-phase permeation rate, reduce gas well water blocking damage protection reservoir according to the water conditioner of this prescription production.
Technical scheme of the present invention is: a kind of formula of gas well water blocking damage treating agent is provided, it is characterized in that: it is formed according to the weight percent proportioning by following component; The weight percent 20.0%-25.0% of host wherein; The weight percent 2.0%-5.0% of nonionogenic tenside; The weight percent 0.5%-1.0% of fluorocarbon surfactant; The weight percent 12.0%-15.0% of cats product, surplus are distilled water.
Described host is benzyl tributyl brometo de amonio or benzyl tributyl ammonium chloride.
Described nonionogenic tenside is polyoxyethylene nonylphenol ether or sucrose fatty ester.
Described fluorocarbon surfactant is the SR18Y fluorocarbon surfactant that Shaanxi Sen Rui Science and Technology Ltd. produces.
Described cats product is a dodecyl benzyl dimethyl ammonium chloride, or cetyl trimethylammonium bromide.
Characteristics of the present invention are: the present invention is primarily aimed at the irreducible water water blocking damage according to the water conditioner of this prescription production; reduce liquid-gas interface tension force, peel off moisture film in the pore throat, increase the contact angle of water and rock; change the wettability of rock surface; reduce capillary pressure, weaken the self-priming effect, reduce reservoir Absorb Water saturation ratio; reduce trigger pressure; improve core gas-phase permeation rate, reduce water blocking damage, the protection reservoir.
The synergy of polyoxyethylene nonylphenol ether that the present invention mentioned or sucrose fatty ester and SR18Y fluorocarbon surfactant can effectively reduce surface tension of liquid, increases the contact angle of water and rock.Benzyl tributyl brometo de amonio or benzyl tributyl ammonium chloride and dodecyl benzyl dimethyl ammonium chloride or cetyl trimethylammonium bromide can make the moisture film attenuation that is adsorbed on the surface, duct, come off, and have effectively enlarged the aperture.This gas well water blocking damage treating agent is with oil field fracturing fluid additive compatibleness under normal temperature and formation temperature commonly used is good at present; allocate fracturing liquid into by design proportion before the pressing crack construction; inject into well in the construction, reduce the water blocking damage that fracturing liquid causes, play the effect of protection reservoir.
Description of drawings
The invention will be further described below in conjunction with the embodiment chart.
Table 1 capillary imbibition liquid level lifting height table;
Table 2 core trigger pressure change list;
Gas-phase permeation rate contrast table before and after the big 281-10/61 water lock of table 3 treatment agent is handled;
Gas-phase permeation rate comparison diagram before and after the big 281-10/61 water lock of Fig. 1 treatment agent is handled;
Gas-phase permeation rate contrast table before and after the big 281-8/61 water lock of table 4 treatment agent is handled;
Gas-phase permeation rate comparison diagram before and after the big 281-8/61 water lock of Fig. 2 treatment agent is handled.
Table 5 is performance index of water lock treatment agent
Chart is effect assessment experiment of the present invention and result:
1, table 1 is capillary imbibition liquid level lifting height change list. Capillary force acts in the process of formation of reservoir water lock injury and plays Main Function. External liquid in the operation process such as drilling well, completion is because capillary force self-priming effect enters gas-bearing formation, and capillary force then hinders the liquid that has entered reservoir and taken out of by gas in the gas production process, forms water blocking damage. Its research evaluation after the water blocking damage treating agent of variable concentrations processes, the lifting height of capillary imbibition liquid level, result of the test sees Table 1 as can be seen from the test results, is that capillary imbibition liquid level lifting height after 1% water blocking damage treating agent is processed is minimum with percentage by weight.
2, table 2 is that the rock core starting pressure reduces change list. Lab-evaluation add the starting pressure of core behind the water blocking damage treating agent, result of the test show add 1% water blocking damage treating agent after the average starting pressure of core reduced by 41.0%.
3, table 3, table 4, Fig. 1, what Fig. 2 described is the situation of change of gas phase permeability before and after large 281-8/61, large two cores of 281-10/61 are processed with 1% water blocking damage treating agent. 30.1% and 57.1% improvement is arranged respectively. Instrument is U.S. TEMCO company HTHP core flowing experiment instrument.
Embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment 1: according to weight percent, add 65.5% distilled water in reactor, add 20% host benzyl tributyl brometo de amonio, stir 20min; Be warming up to 40 ℃, add 2.0% nonionogenic tenside polyoxyethylene nonylphenol ether again, add the SR18Y fluorocarbon surfactant that 0.5% Shaanxi Sen Rui Science and Technology Ltd. produces, stir 10min; Add 12.0% cats product dodecyl benzyl dimethyl ammonium chloride at last, stir 20min and obtain gas well water lock treatment agent.
Embodiment 2: equally according to weight percent, add 54% distilled water in reactor, add 25% host benzyl tributyl brometo de amonio, stir 25min; Be warming up to 40 ℃, add 5.0% nonionogenic tenside sucrose fatty ester again, add 1.0% Shaanxi Sen Rui Science and Technology Ltd. and produce the SR18Y fluorocarbon surfactant, stir 25min; Add 15.0% cats product cetyl trimethylammonium bromide at last, stir 20min and obtain gas well water lock treatment agent.
Embodiment 3: according to weight percent, add 60% distilled water in reactor, add 22% host benzyl tributyl ammonium chloride, stir 20min; Be warming up to 40 ℃, add 3.0% nonionogenic tenside polyoxyethylene nonylphenol ether, add the SR18Y fluorocarbon surfactant that 0.8% Shaanxi Sen Rui Science and Technology Ltd. produces, stir 10min; Add 14.2% cats product dodecyl benzyl dimethyl ammonium chloride, stir 15min and obtain gas well water lock treatment agent.
Embodiment 4: according to weight percent, add 62% distilled water in reactor, add 23% host benzyl tributyl ammonium chloride, stir 20min; Be warming up to 40 ℃, add 2.0% nonionogenic tenside sucrose fatty ester, add the SR18Y fluorocarbon surfactant that 0.7% Shaanxi Sen Rui Science and Technology Ltd. produces, stir 10min; Add 12.30% cats product cetyl trimethylammonium bromide, stir 15min and obtain gas well water lock treatment agent.
In same block test, use conventional water-based fracturing liquid system and carry out fracturing reform early stage, the row's of returning cycle is long, the individual layer open-flow capacity is less than 1000 side/skies, can't reach industrial gas, after testing at the scene with the water blocking damage treating agent of the foregoing description production, the row's of returning time shortens 80 hours, realize individual layer open-flow capacity 23400 side/skies, form industrial gas.
Table 5 is performance index of water lock treatment agent, and the performance index of water lock treatment agent should meet table 5 requirement among the embodiment.
| Water lock treatment agent percentage concentration (m/m), % | 0 | 0.5 | 0.8 | 1.0 | 1.5 | 2.0 | 3.0 |
| Capillary imbibition liquid level lifting height, cm | 1.5 | 0.9 | 0.7 | 0.5 | 0.7 | 0.7 | 0.8 |
Table 1
Table 2
| Core number | Project | Before the water lock is handled | After the water lock is handled | Rate of permeation improvement rate (%) |
| Big 281-8/61 | Core gas-phase permeation rate (10 -3μm 2) | 0.10 | 0.13 | 30.1 |
Table 3
| Core number | Project | Before the water lock is handled | After the water lock is handled | Rate of permeation improvement rate (%) |
| Big 281-10/61 | Core gas-phase permeation rate (10 -3μm 2) | 0.14 | 0.22 | 57.1 |
Table 4
Table 5
Claims (5)
1, formula of gas well water blocking damage treating agent is characterized in that: it is formed according to the weight percent proportioning by following component; The weight percent 20.0%-25.0% of host wherein; The weight percent 2.0%-5.0% of nonionogenic tenside; The weight percent 0.5%-1.0% of fluorocarbon surfactant; The weight percent 12.0%-15.0% of cats product, surplus are distilled water.
2, according to right 1 described gas well water blocking damage treating agent, it is characterized in that: described host is benzyl tributyl brometo de amonio or benzyl tributyl ammonium chloride.
3, according to right 1 described gas well water blocking damage treating agent, it is characterized in that: described nonionogenic tenside is polyoxyethylene nonylphenol ether or sucrose fatty ester.
4, according to right 1 described gas well water blocking damage treating agent, it is characterized in that: described fluorocarbon surfactant is the SR18Y fluorocarbon surfactant that Shaanxi Sen Rui Science and Technology Ltd. produces.
5, according to right 1 described gas well water blocking damage treating agent, it is characterized in that: cats product is a dodecyl benzyl dimethyl ammonium chloride, or cetyl trimethylammonium bromide.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555309A (en) * | 2013-10-22 | 2014-02-05 | 赵静 | Water block damage treating agent based on biological surface active agent and preparation method thereof |
| CN103865509A (en) * | 2014-03-07 | 2014-06-18 | 中国石油大学(华东) | Long-acting mixed fluorocarbon surfactant treating agent for improving condensate gas reservoir recovery efficiency and application of mixed fluorocarbon surfactant treating agent |
| CN104863553A (en) * | 2015-04-23 | 2015-08-26 | 赵金树 | Novel gas well water block releasing method |
| CN107144671A (en) * | 2017-06-23 | 2017-09-08 | 中国电建集团贵阳勘测设计研究院有限公司 | Shale air water locks Effect Evaluation device and method under a kind of condition of high voltage |
| CN107502331A (en) * | 2017-07-14 | 2017-12-22 | 陕西森瑞石油技术开发有限公司 | A kind of shale oil fracturing fluid crude oil extractant and preparation method and application |
| CN107903887A (en) * | 2017-08-15 | 2018-04-13 | 陕西森瑞石油技术开发有限公司 | Excessive phase shale gas fracturing fluid in a kind of sea land and preparation method and application |
| CN110746310A (en) * | 2019-10-12 | 2020-02-04 | 青岛大学 | Preparation method of novel low-permeability reservoir water lock relieving agent |
| CN111778006A (en) * | 2020-07-28 | 2020-10-16 | 西安通源正合石油工程有限公司 | Enhanced gas production material for comprehensive treatment of gas well and preparation method thereof |
Family Cites Families (3)
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| US6858566B1 (en) * | 2002-05-31 | 2005-02-22 | Halliburton Energy Services, Inc. | Methods of generating gas in and foaming well cement compositions |
| US7514390B2 (en) * | 2004-12-28 | 2009-04-07 | Conocophillips Company | Method for removing filter cake from a horizontal wellbore using acid foam |
| CN100513512C (en) * | 2007-07-31 | 2009-07-15 | 中国石油天然气股份有限公司 | Corrosion-release scale-proof wax-removal viscosity-reducing agent and preparation method thereof |
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2008
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555309A (en) * | 2013-10-22 | 2014-02-05 | 赵静 | Water block damage treating agent based on biological surface active agent and preparation method thereof |
| CN103555309B (en) * | 2013-10-22 | 2016-09-28 | 大连知微生物科技有限公司 | A kind of water blocking damage treating agent based on biosurfactant and preparation method thereof |
| CN103865509A (en) * | 2014-03-07 | 2014-06-18 | 中国石油大学(华东) | Long-acting mixed fluorocarbon surfactant treating agent for improving condensate gas reservoir recovery efficiency and application of mixed fluorocarbon surfactant treating agent |
| CN103865509B (en) * | 2014-03-07 | 2015-05-13 | 中国石油大学(华东) | Long-acting mixed fluorocarbon surfactant treating agent for improving condensate gas reservoir recovery efficiency and application of mixed fluorocarbon surfactant treating agent |
| CN104863553A (en) * | 2015-04-23 | 2015-08-26 | 赵金树 | Novel gas well water block releasing method |
| CN107144671A (en) * | 2017-06-23 | 2017-09-08 | 中国电建集团贵阳勘测设计研究院有限公司 | Shale air water locks Effect Evaluation device and method under a kind of condition of high voltage |
| CN107502331A (en) * | 2017-07-14 | 2017-12-22 | 陕西森瑞石油技术开发有限公司 | A kind of shale oil fracturing fluid crude oil extractant and preparation method and application |
| CN107903887A (en) * | 2017-08-15 | 2018-04-13 | 陕西森瑞石油技术开发有限公司 | Excessive phase shale gas fracturing fluid in a kind of sea land and preparation method and application |
| CN110746310A (en) * | 2019-10-12 | 2020-02-04 | 青岛大学 | Preparation method of novel low-permeability reservoir water lock relieving agent |
| CN110746310B (en) * | 2019-10-12 | 2023-05-26 | 青岛大学 | Preparation method of low-permeability oil reservoir water lock release agent |
| CN111778006A (en) * | 2020-07-28 | 2020-10-16 | 西安通源正合石油工程有限公司 | Enhanced gas production material for comprehensive treatment of gas well and preparation method thereof |
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| CN101423755B (en) | 2010-12-22 |
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