CN1067945A - Discharge assistant for acidification and fracturing process - Google Patents
Discharge assistant for acidification and fracturing process Download PDFInfo
- Publication number
- CN1067945A CN1067945A CN 91107226 CN91107226A CN1067945A CN 1067945 A CN1067945 A CN 1067945A CN 91107226 CN91107226 CN 91107226 CN 91107226 A CN91107226 A CN 91107226A CN 1067945 A CN1067945 A CN 1067945A
- Authority
- CN
- China
- Prior art keywords
- fracturing
- ethylene glycol
- weight
- surface tension
- working fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000020477 pH reduction Effects 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 35
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 9
- 239000011737 fluorine Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 3
- -1 cationic quaternary ammonium salt Chemical class 0.000 claims abstract description 3
- 229910000077 silane Inorganic materials 0.000 claims abstract description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000009736 wetting Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 1
- 125000003368 amide group Chemical group 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000012224 working solution Substances 0.000 description 9
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Landscapes
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The present invention belongs to a chemical agent for acidizing or fracturing construction operation of oil-gas well. The surface tension of the acidizing or fracturing working fluid is reduced, the wetting condition of the stratum is changed, the working fluid is favorable for flowing back, the stratum is prevented from being damaged by the acidizing or fracturing working fluid, and the effects of increasing the yield and stabilizing the yield of the oil-gas well are achieved. The acid fracturing fluid is characterized by containing fluorine and amido-containing cationic quaternary ammonium salt, nonionic silane, methanol or glycol, and when the weight ratio of the substances is 1: 2-100: 10-500, the acid fracturing fluid has the effect of obviously reducing the surface tension of the acid fracturing fluid.
Description
The invention belongs to the chemical agent that a kind of acidification of oil gas well or pressing crack construction operation are used, it helps the row of returning of working solution by surface tension that reduces acidifying or fracturing working fluid and the wetting situation that changes the stratum, make the stratum exempt from the injury of acidifying or fracturing working fluid, reach the effect of well production increment stable yields.
The row of returning of acidification of oil gas well and fracturing working fluid is the technical barrier in the oilfield exploitation procedure always.Particularly some stratum energies are lower, poor permeability, in obstruction and the with serious pollution oil gas well, make the row of returning more difficult owing to the working solution surface tension value is higher, the acidifying and the fracturing working fluid that are trapped in the stratum will make the stratum be subjected to grievous injury and directly influence production of hydrocarbons.In order to improve flowback effect, various countries are all carrying out big quantity research aspect the reduction working solution surface tension.Acidifying and fracturing technology cleanup additive commonly used at present have two classes.One class is fluorine-containing surfactant (being called for short the agent of fluorine table), another kind of is hydrocarbon-surfactant (being called for short the agent of hydrocarbon table), (SPE 13374 according to prior art " New Stimulation Technigue Improvese Frac Recovery and Increases Productions ", 31, Oct.1984) described, it is not high that the agent of hydrocarbon table reduces the capillary ability of working solution, when added amount of chemical is 0.2%, the working solution surface tension value generally all is higher than 30mN/m, so its flowback effect is undesirable, but this class surfactant does not produce absorption to the capillary wall in the stratum; Though having than the highland, the hydrocarbon table agent that the agent of fluorine table is compared reduces the capillary ability of working solution (generally can be lower than 28mN/m), but when being used for formation acidizing and pressing crack construction operation, capillary wall in the stratum will produce it and adsorbs consumingly and cause the working solution surface tension value to be increased to rapidly more than the 40mN/m, so limited its use widely.
In order to overcome the weak point of above-mentioned prior art, the objective of the invention is to, a kind of compound acidifying and fracturing technology cleanup additive are provided, compare with above-mentioned prior art, it is neither adsorbed by capillary wall, and tool reduces acidifying and the capillary ability of fracturing working fluid significantly again, thereby improves the flowback effect of working solution greatly, make the stratum exempt from the injury of acidifying and pressing crack construction operation, guarantee the volume increase and the stable yields of oil gas well.
Purpose of the present invention can reach by following measure, that is: by certain fluorine table agent, certain agent of hydrocarbon table and alcohol are formed by directly mixing at normal temperatures and are a kind of light yellow transparency liquid, it is characterized in that the agent of fluorine table is a kind of cationic quaternary ammonium salt of fluorine-containing amide-containing, be called for short component A.Its molecular formula is:
The agent of hydrocarbon table is a kind of silane (abbreviation B component) of nonionic, and its molecular formula is:
[RO（CH
2CH
2O）
n]SiCH
3
R: carbon number is 12～18 alkyl
An integer value in N:5～9
Alcohol is methyl alcohol or ethylene glycol.
Feature of the present invention also is, when by weight, and A: B: methyl alcohol or ethylene glycol=1: 2～100: 10～500, after directly mixing at normal temperatures, can obviously reduce the surface tension of acidifying and fracturing working fluid; And ought be by weight, A: B: methyl alcohol or ethylene glycol=1: 4～80: 30～300, directly mix at normal temperatures, can significantly reduce the surface tension of acidifying and fracturing working fluid; Especially ought be by weight, A: B: ethylene glycol=1: 5: 40 after directly mixing at normal temperatures, has the effect that reduces acidifying and fracturing working fluid surface tension value best.
The present invention carries out GB5549-85 to the mensuration of surface tension value
The present invention is described further in conjunction with following embodiment.
Embodiment 1:
By weight, A: B: methyl alcohol=1: 100: 500 is formed by directly mixing light yellow liquid at normal temperatures.
Embodiment 2:
By weight, A: B: ethylene glycol=1: 2: 10 is formed by directly mixing light yellow liquid at normal temperatures.
Embodiment 3:
By weight, A: B: methyl alcohol=1: 80: 300 is formed by directly mixing light yellow liquid at normal temperatures.
Embodiment 4:
By weight, A: B: ethylene glycol=1: 4: 30 is formed by directly mixing light yellow liquid at normal temperatures.
Most preferred embodiment:
By weight, A: B: ethylene glycol=1: 5: 40, be formed by directly mixing light yellow liquid at normal temperatures, its performance sees attached list 1, subordinate list 2 and explanation thereof.
The subordinate list explanation:
Table 1 shows that the present invention compares with above-mentioned prior art, no matter is the initial surface tension value, still by the surface tension value behind the hollow billet, all is starkly lower than the agent of fluorine table or the agent of hydrocarbon table of single component
Table 2 shows that the present invention greatly reduces the acidifying of several types at present commonly used and the surface tension value of fracturing working fluid, thereby the row of returning of having improved working solution significantly leads (all greater than 97%).
Annotate: the present invention tests data in the sequence number 1～6 and takes from above-mentioned prior art " New Stimulation Technigue Improves Frac Recovery and Increase Production " (SPE 13374,31Oct, 1984).
Claims (4)
1, a kind of chemistry aiding discharging that is used for acidification of oil gas well and pressing crack construction process squeezes, and is formed by directly mixing light yellow transparency liquid at normal temperatures by two kinds of dissimilar surfactants and alcohol, it is characterized in that:
One of above-mentioned surfactant is a kind of fluorine-containing cationic quaternary ammonium salt (being called for short component A), and its molecular formula is:
Two of above-mentioned surfactant is a kind of silane (abbreviation B component) of nonionic, and its molecular formula is:
[RO(CH
2CH
2O)
n]SiCH
3
R: carbon number is 12～18 alkyl
An integer value in N:5～9
Alcohol is methyl alcohol or ethylene glycol.
2, according to claim 1, it is characterized in that, by weight, A: B: methyl alcohol or ethylene glycol=1: 2～100: 10～500.
3, according to claim 1 or 2, it is characterized in that, by weight, A: B: methyl alcohol or ethylene glycol=1: 4～80: 30～300.
4, according to claim 1 or 2 or 3 described, it is characterized in that, by weight, A: B: ethylene glycol=1: 5: 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107226 CN1067945A (en) | 1991-06-15 | 1991-06-15 | Discharge assistant for acidification and fracturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107226 CN1067945A (en) | 1991-06-15 | 1991-06-15 | Discharge assistant for acidification and fracturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1067945A true CN1067945A (en) | 1993-01-13 |
Family
ID=4908581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107226 Pending CN1067945A (en) | 1991-06-15 | 1991-06-15 | Discharge assistant for acidification and fracturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067945A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079487C (en) * | 1999-01-04 | 2002-02-20 | 高芒来 | Use of single molecular di-quaternary ammonium-salt in displacing-oil and demulsifying raw oil in oil field |
| CN100335746C (en) * | 2001-12-21 | 2007-09-05 | 索菲泰克公司 | A novel fluid system having controllable reversible viscosity |
| CN100358969C (en) * | 2005-10-18 | 2008-01-02 | 中国石油大学(华东) | Drainage aid for high temperature acidification |
| CN101538462B (en) * | 2009-04-30 | 2011-08-03 | 中国石油天然气股份有限公司 | Oil well cleanup additive |
| CN103215020A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | A preparation method of wettability modifier for gas well fracturing |
| CN103275691A (en) * | 2013-06-03 | 2013-09-04 | 深圳市百勤石油技术有限公司 | Reusable slippery water fracturing fluid for shale oil and gas reservoir |
-
1991
- 1991-06-15 CN CN 91107226 patent/CN1067945A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079487C (en) * | 1999-01-04 | 2002-02-20 | 高芒来 | Use of single molecular di-quaternary ammonium-salt in displacing-oil and demulsifying raw oil in oil field |
| CN100335746C (en) * | 2001-12-21 | 2007-09-05 | 索菲泰克公司 | A novel fluid system having controllable reversible viscosity |
| CN100358969C (en) * | 2005-10-18 | 2008-01-02 | 中国石油大学(华东) | Drainage aid for high temperature acidification |
| CN101538462B (en) * | 2009-04-30 | 2011-08-03 | 中国石油天然气股份有限公司 | Oil well cleanup additive |
| CN103215020A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | A preparation method of wettability modifier for gas well fracturing |
| CN103275691A (en) * | 2013-06-03 | 2013-09-04 | 深圳市百勤石油技术有限公司 | Reusable slippery water fracturing fluid for shale oil and gas reservoir |
| CN103275691B (en) * | 2013-06-03 | 2016-03-09 | 深圳市百勤石油技术有限公司 | The slippery water fracturing liquid that a kind of shale oil gas reservoir can reuse |
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| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |