CN1940010A - Heavy acid-fluid formula - Google Patents
Heavy acid-fluid formula Download PDFInfo
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- CN1940010A CN1940010A CN 200510105812 CN200510105812A CN1940010A CN 1940010 A CN1940010 A CN 1940010A CN 200510105812 CN200510105812 CN 200510105812 CN 200510105812 A CN200510105812 A CN 200510105812A CN 1940010 A CN1940010 A CN 1940010A
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Abstract
An emphasized acid liquor formula consists of 31% industrial hydrochloric acid 60-125 proportion, inorganic salt saturated solution 30-65 proportion, acid liquor gelatinizer 0.6-1.6 proportion, acid liquor corrosion inhibitor 3-5 proportion, demulsifier 1-2 proportion, ferrous ion stabilizer 1-2 proportion, and auxiliary 1-2 proportion; the emphasized fracturing liquid density is between 1.25-1.55g/cm3. It can be used to decrease construction pressure at well opening, finish oil-well fracture of deep well, super-deep well, abnormal high-pressure well and realize storage-layer transformation.
Description
Technical field
The present invention relates to petroleum exploration and development oil gas well stimulation technology field, particularly the acid solution of using in the oil and water well acidification Technology.
Background technology
In oil and gas exploration and exploitation, splitting technology at the acid fracturing of carbonate reservoir is to utilize the chemical corrosion of acid solution, tamper in the dissolving stratum, enlarge or extend layered suture hole, ground, recover and improve the rate of permeation on stratum, reduce oil and flow into well resistance or water filling resistance, reach technical measures finding hydrocarbon zone, lifting Reserves Evaluation grade and improve oil gas well single well productivity.With improving constantly of drilling technique level, a collection of deep-well, ultra deep well, surpressure well, unusual high-ground stress well, fine and close oil well have been finished.Split reservoir reconstruction for deep-well, ultra deep well, surpressure well, unusual high-ground stress well, fine and close well acid fracturing,, utilize existing acid solution prescription and present acid fracturing to split technology and can't carry out with the equipment construction because wellhead pressure is higher during construction.As Ke Shen 101 wells of Tarim Basin Oilfield Company, well depth surpasses 6300m, and reservoir pressure coefficient is greater than 1.98, and the formation fracture fracture gradient is greater than 0.022MPa/m, and wellhead pressure will be above 103Mpa when acid fracturing split construction.Conventional acid liquid system density is generally 1.108/cm
3And existing fracturing truck maximum working pressure can only reach 103Mpa.Consider safety and the fracturing unit high loaded process for a long time of well head production tree, adopt conventional acid solution construction, can't finish acid fracturing and split construction task.
Summary of the invention
The purpose of this invention is to provide the heavy acid-fluid formula that uses in a kind of high-pressure oil well acidification technology, improve acid solution density, increase fluid column pressure in the pit shaft, reduce the well head operation pressure, the acid fracturing that adapts to deep-well, ultra deep well, surpressure well, unusual high-ground stress well, fine and close well reservoir splits reservoir reconstruction.Overcome this class well wellhead pressure height, use present construction equipment can't finish the difficult problem that acid fracturing splits, reach and utilize the present invention to increase the weight of acid solution and existing equipment to finish the acid fracturing of this class exceptional well smoothly and split construction.Technical scheme of the present invention is: a kind of heavy acid-fluid formula, and its composition and volume ratio thereof are:
31% technical hydrochloric acid 60～125
Inorganic salt saturated solution 30～65
Gelling agent for acid fluid 0.6～1.6
Corrosion inhibitors for acidic media 3～5
Emulsion splitter 1～2
Fe stabilizer 1～2
Cleanup additive 1～2
The described heavy-fluid density that adds is 1.25～1.55g/cm
3
Add inorganic salt saturated solution, gelling agent for acid fluid, corrosion inhibitors for acidic media, emulsion splitter, Fe stabilizer and cleanup additive in hydrochloric acid, formation density is 1.25-1.55g/cm
3The acid solution that increases the weight of not be that reaching increases fluid column pressure in the pit shaft, reduces the well head operation pressure, adapts to existing equipment.Described gelling agent for acid fluid is as DJ-09, KMS-2, BD1-6B; Described corrosion inhibitors for acidic media is as DJ-04, KMS-6; Described emulsion splitter is as FRZ-4, DJ-10, OP.Described Fe stabilizer is as DJ-07, KMS-7; Described cleanup additive is as HSC-25, DJ-02; Gelling agent for acid fluid: DJ-09, KMS-2, BD1-6B, corrosion inhibitors for acidic media DJ-04, KMS-6, emulsion splitter FRZ-4, DJ-10, OP, Fe stabilizer DJ-07, KMS-7, cleanup additive HSC-25, DJ-02 have formal product on the market, the product that those skilled in the art, site operation personnel and procurement staff know, wherein DJ-09, DJ-04, DJ-10, DJ-07, DJ-02 are Kuerle, Xinjiang new Kate's oilfield chemistry company commercial disignation; KMS-2, KMS-6, FRZ-4, KMS-7, HSC-25 are Beijing Ke Maishi Petroleum Technology Co., Ltd commercial disignations; BD1-6B is Guanghan, Sichuan beidellite oil Science and Technology Ltd. commercial disignation.
This increases the weight of acid solution and adopts inorganic salt to increase the weight of, and has formed the heavy acid-fluid formula of different densities.The present invention increases the weight of the high energy of acid solution density and reaches 1.55g/cm
3The density that increases the weight of acid solution can be at 1.25-1.55g/cm
3In the scope, adjust according to the reservoir pressure of the well of constructing, the method for regulating density is for increasing the weight of acid solution density by ratio that increases the inorganic salt saturated solution or the ratio raising that reduces hydrochloric acid; Otherwise, increase the ratio of hydrochloric acid or the ratio of minimizing inorganic salt saturated solution, reduce and increase the weight of acid solution density.Utilizing the present invention to increase the weight of acid solution and existing weaponry and equipment just can finish the acid fracturing of deep-well, ultra deep well, surpressure well, unusual high-ground stress well, fine and close well reservoir smoothly and split reservoir reconstruction.Finished the oil reservoir acidizing treatment that conventional acid solution can not be finished.Overcome this class well wellhead pressure height, the acid fracturing that can't finish splits a difficult problem.This increases the weight of acid solution, and also to have high temperature corrosion inhibition, iron ion stability, anti-swollen performance, compatibility and a high temperature stability performance good, and low surface tension and have excellent compatibility with well control fluid, can not cause characteristics such as corrosion to down-hole string.Heavy acid-fluid formula system of the present invention is well 10 mouthfuls of wells on probation under our company inside successfully.Use increases the weight of acid solution and reduces the well head operation pressure, makes these wells finish construction under existing 2000 type fracturing truck conditions.Wherein many mouthfuls of wells such as Ke Shen 101,102 obtain the high produced hydrocarbon fluid of daily output more than 200 tons, and direct economic benefit has reached more than 100,000,000 yuan at present.
Embodiment
Embodiment 1
In the laboratory, the performance of heavy acid-fluid formula system is tested respectively.
Test process is as follows:
1, increases the weight of the configuration of acid solution and the test of density: measure 325.6mLCaBr
2Saturated solution adds the 614mL31% technical hydrochloric acid, under agitation adds the 6g gelling agent for acid fluid, and stir about 1 hour rises and adds 30mL corrosion inhibitors for acidic media, 10mL emulsion splitter, 10mL Fe stabilizer, 10mL cleanup additive successively after sticking.Stir, place more than 4 hours, can carry out performance test.Densometer is used in the test of density, and the density of above-mentioned acid solution is 1.35g/cm
3The ratio of each material sees the following form:
| Component | Volume (mL) | Volume ratio | |
| 31% technical hydrochloric acid | 614 | 61.4 | |
| The inorganic salt saturated solution | CaBr 2 | 325.6 | 32.56 |
| Gelling agent for acid fluid | KMS-2 | 6 | 0.6 |
| Corrosion inhibitors for acidic media | DJ-04 | 30 | 3 |
| Emulsion splitter | FRZ-4 | 10 | 1 |
| Fe stabilizer | KMS-7 | 10 | 1 |
| Cleanup additive | DJ-02 | 10 | 1 |
2, test this acidizing fluid corrosive nature: use the acid solution of above-mentioned configuration,, increase the weight of the Evaluation of Corrosion Resistance of acidizing fluid, test condition: encloses container according to the SY/T5405-1996 standard; 120 ℃ of temperature.The experimental result corrosion speed is 22.34g/m
2.h.
3, test the rheological property of this acid solution: the RV30 viscometer of the German HAKKE of experiment use company is tested the rheological property that increases the weight of acid solution, and test result sees the following form.
Increase the weight of the rheological property of acid solution
| Experimental temperature (℃) | 30 | 90 | 130 |
| Viscosity (mPa.S) | 36.7 | 24.4 | 14.5 |
| Consistency index | 0.4829 | 0.2718 | 0.1298 |
| The fluidised form index | 0.4736 | 0.6009 | 0.7515 |
4, increase the weight of the stability of acid solution: whether will increase the weight of the acid solution room temperature and place 7 days, investigating has oily matter and precipitation to generate, and acid solution color, viscosity change; To increase the weight of acid solution 130 ℃ of following constant temperature 4 hours, and observe then and have or not layering, precipitation and Shan shape thing to generate, increase the weight of the thermostability of acid solution with investigation.By testing: acid solution was placed 7 days, and no oily matter is separated out and sedimentary generation, and viscosity is basicly stable constant.Acid solution after the heating does not have layering, precipitation and oily matter yet and generates.Illustrate that increasing the weight of acid solution has good shelf-stability and thermostability.
The experimental test conclusion: the density that increases the weight of acid solution can reach 1.35g/cm
3, normal temperature is placed and pyroprocessing does not have layering, precipitation and oily matter generation, has satisfactory stability.This acid liquid corrosion speed is 22.34g/m
2.h.This acid solution has good rheological simultaneously, and normal temperature viscosity reaches 36.7mPa.S, and 130 ℃ also have 14.5mPa.S down.
Embodiment 2
Rig-site utilization embodiment 1:
At first, calculating the required total amount that increases the weight of acid solution according to layer position thickness, porosity and the acidifying radiuscope of intending enforcement acid fracturing transformation well in operation is 200m
3, then calculate the consumption of required each component by the aforementioned formula proportional meter:
The technical hydrochloric acid of 31% concentration, 122.9m
3
The inorganic salt saturated solution adopts Sodium Bromide saturated solution, consumption 64.5m3;
Gelling agent for acid fluid adopts BDl-6B, 1.6 tons of consumptions;
Corrosion inhibitors for acidic media adopts KMS-6, consumption 5m
3
Emulsion splitter adopts OP, consumption 2m
3
Fe stabilizer adopts DL-07, consumption 2m
3
Cleanup additive adopts HSC-25, consumption 2m
3
Each amounts of components and ratio see the following form:
| Component | Volume (m 3) | Volume ratio | |
| 31% technical hydrochloric acid | 122.9 | 122.9 | |
| The inorganic salt saturated solution | NaBr | 64.5 | 64.5 |
| Gelling agent for acid fluid | BDl-6B | 1.6t | 1.6t |
| Corrosion inhibitors for acidic media | KMS-6 | 5 | 5 |
| Emulsion splitter | OP | 2 | 2 |
| Fe stabilizer | DL-07 | 2 | 2 |
| Cleanup additive | HSC-25 | 2 | 2 |
Earlier the NaBr saturated solution of above-mentioned amount and 31% industrial acid fluid are added in the dosing pond during dosing, add corrosion inhibitors for acidic media, start stirrer, vacuum sucks acid solution thickening material BD1-6B simultaneously under agitation condition.After stir about rose and glues in 40 minutes, respectively toward interior Fe stabilizer DJ-07, acid solution cleanup additive HSC-25, the emulsion splitter OP that adds calculated amount of liquid pool.After mixing, install in the special-purpose acid tank truck and transport to the scene, with 2000 type fracturing trucks institute's dispense liquid is clamp-oned oil well operation reservoir, acid discharge as early as possible after construction finishes reaches more than 70% of injection rate until liquid effluent, stops discharge opeing.Investigate, estimate this acid fracturing and split the transformation result.
Embodiment 3
Rig-site utilization embodiment 2:
At first, calculating the required total amount that increases the weight of acid solution according to layer position thickness, porosity and the acidifying radiuscope of intending enforcement acid fracturing transformation well in operation is 350m
3Then calculate the consumption of required each component: the technical hydrochloric acid 215m of 31% concentration in the aforementioned formula ratio
3The inorganic salt saturated solution adopts calcium chloride saturated solution, consumption 121m
3Gelling agent for acid fluid adopts DJ-09, consumption 2.8t, and corrosion inhibitors for acidic media adopts KMS-6, consumption 7m
3Emulsion splitter adopts DJ-10, consumption 1.75m
3Fe stabilizer adopts DJ-07, consumption 3.5m
3Cleanup additive adopts HSC-25, consumption 1.75m
3
| Component | Volume (mL) | Volume ratio | |
| 31% technical hydrochloric acid | 215 | 123 | |
| The inorganic salt saturated solution | CaCl 2 | 121 | 69 |
| Gelling agent for acid fluid | DJ-09 | 2.8t | 1.6 |
| Corrosion inhibitors for acidic media | KMS-6 | 7 | 4 |
| Emulsion splitter | DJ-10 | 1.75 | 1 |
| Fe stabilizer | DJ-07 | 3.5 | 2 |
| Cleanup additive | HSC-25 | 1.75 | 1 |
Elder generation is with calculated amount CaCl during dosing
2Saturated solution and 31% industrial acid fluid add in the dosing pond, add corrosion inhibitors for acidic media, start stirrer, and vacuum sucks acid solution thickening material DJ-09 simultaneously under agitation condition.After stir about 40min rises and glues, respectively toward interior Fe stabilizer DJ-07, acid solution cleanup additive HSC-25, the emulsion splitter DJ-10 that adds calculated amount of liquid pool.After mixing, install in the special-purpose acid tank truck and transport to the scene, with 2000 type fracturing trucks institute's dispense liquid is clamp-oned oil well operation reservoir, acid discharge as early as possible after construction finishes reaches more than 70% of injection rate until liquid effluent, stops discharge opeing.Investigate, estimate this acid fracturing transformation result.
Claims (8)
1, a kind of heavy acid-fluid formula is characterized in that: composition and volume ratio thereof are
31% technical hydrochloric acid 60～125,
Inorganic salt saturated solution 30～65,
Gelling agent for acid fluid 0.6～1.6,
Corrosion inhibitors for acidic media 3～5,
Emulsion splitter 1～2,
Fe stabilizer 1～2,
Cleanup additive 1～2.
2, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, the described heavy-fluid density that adds is 1.25～1.55g/cm
3
3, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, that used inorganic salt adopt is NaCl, KCl, CaCl
2Or CaBr
2
4, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, described gelling agent for acid fluid is DJ-09, KMS-2, BD1-6B.
5, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, described corrosion inhibitors for acidic media is DJ-04, KMS-6.
6, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, described emulsion splitter is FRZ-4, DJ-10, OP.
7, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, described Fe stabilizer is DJ-07, KMS-7.
8, a kind of heavy acid-fluid formula as claimed in claim 1 is characterized in that, described cleanup additive is HSC-25, DJ-02.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101058123A CN100475929C (en) | 2005-09-29 | 2005-09-29 | Heavy acid-fluid formula |
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|---|---|---|---|
| CNB2005101058123A CN100475929C (en) | 2005-09-29 | 2005-09-29 | Heavy acid-fluid formula |
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| CN1940010A true CN1940010A (en) | 2007-04-04 |
| CN100475929C CN100475929C (en) | 2009-04-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250609A (en) * | 2011-05-25 | 2011-11-23 | 中国石油集团川庆钻探工程有限公司 | Low-friction-resistance weighted acid fracturing working fluid |
| CN102352236A (en) * | 2011-08-16 | 2012-02-15 | 中国石油化工股份有限公司 | Ultra-high density acid solution and preparation method thereof |
| CN102876314A (en) * | 2012-09-27 | 2013-01-16 | 中国石油化工股份有限公司 | Weighted fracturing fluid |
| CN103820100A (en) * | 2014-03-07 | 2014-05-28 | 中国石油大学(华东) | Gelled acid used for acid fracturing of high-temperature fractured-vuggy type carbonate reservoir |
| CN104629711A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气集团公司 | Slow-speed low-friction acid solution system for acid fracturing |
| CN107795299A (en) * | 2016-08-30 | 2018-03-13 | 中国石油化工股份有限公司 | A kind of method that profit well acidizing returns discharge opeing recycling reuse |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399551A (en) * | 2011-10-25 | 2012-04-04 | 中国石油化工集团公司 | Weighting acid fluid |
-
2005
- 2005-09-29 CN CNB2005101058123A patent/CN100475929C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250609A (en) * | 2011-05-25 | 2011-11-23 | 中国石油集团川庆钻探工程有限公司 | Low-friction-resistance weighted acid fracturing working fluid |
| CN102352236A (en) * | 2011-08-16 | 2012-02-15 | 中国石油化工股份有限公司 | Ultra-high density acid solution and preparation method thereof |
| CN102876314A (en) * | 2012-09-27 | 2013-01-16 | 中国石油化工股份有限公司 | Weighted fracturing fluid |
| CN104629711A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气集团公司 | Slow-speed low-friction acid solution system for acid fracturing |
| CN103820100A (en) * | 2014-03-07 | 2014-05-28 | 中国石油大学(华东) | Gelled acid used for acid fracturing of high-temperature fractured-vuggy type carbonate reservoir |
| CN103820100B (en) * | 2014-03-07 | 2017-02-08 | 中国石油大学(华东) | Gelled acid used for acid fracturing of high-temperature fractured-vuggy type carbonate reservoir |
| CN107795299A (en) * | 2016-08-30 | 2018-03-13 | 中国石油化工股份有限公司 | A kind of method that profit well acidizing returns discharge opeing recycling reuse |
| CN107795299B (en) * | 2016-08-30 | 2019-07-26 | 中国石油化工股份有限公司 | A kind of method that grease well acidizing returns drain recycling reuse |
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| Publication number | Publication date |
|---|---|
| CN100475929C (en) | 2009-04-08 |
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