CN106350046A - Temperature control mud cake cleaning liquid and preparing method as well as application - Google Patents
Temperature control mud cake cleaning liquid and preparing method as well as application Download PDFInfo
- Publication number
- CN106350046A CN106350046A CN201610764520.9A CN201610764520A CN106350046A CN 106350046 A CN106350046 A CN 106350046A CN 201610764520 A CN201610764520 A CN 201610764520A CN 106350046 A CN106350046 A CN 106350046A
- Authority
- CN
- China
- Prior art keywords
- mud cake
- temperature control
- control type
- removal liquid
- type mud
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention provides temperature control mud cake cleaning liquid, which is included by the following raw materials, by weight percent, 80%-90% of organic ester mixture, 0.074%-0.1% of preservative, 0.00014%-0.0002% of hydrochloric acid, 5%-8% of calcium salt and the rest is water. The temperature control mud cake cleaning liquid can protect the primary physical property of reservoir stratum well with small amount which is easy to conduct, and can also reduce later development costs to obtain decent economic returns and social benefits, worthwhile for promotion; meanwhile can be transported conveniently, with simple preparing method and required equipment requirements.
Description
Technical field
The present invention relates to a kind of temperature control type mud cake removal liquid and preparation method and application, high-efficient cleaning is except no native phase water-based drilling
Liquid mud cake.
Background technology
The reservoir damage that mud cake causes is institute's inevitably one of damage factors in drilling process, after having badly influenced
The development effectiveness of phase.At present, the completion mode of oil gas horizontal well payzone section some be barefoot completion, lower after completion insulate
Device, is usually taken low solid phase completion mud completion.After completion practice, thicker mud is still left in the nearly borehole wall area of Reservoir Section
Cake, leads to reservoir damage.It is often necessary to acidizing flushing operation during later development, improve recovery ratio.Conventional Acidizing Technology
The special installations such as acidproof acid tank truck, pump, the transport on ground and operation is needed to be subject to the high standard alignment request of hse and environmental protection.
Conventional acidizing flushing operation uses the acid of high intensity, and the acid of high intensity is gone back while removing mud cake well-flushing
The corrosion of reservoir rock can be caused, change reservoir permeability matter, serious meeting causes full leak-off, more increased reservoir irreversible
Injury.Secondly, pickling operation is to use 15-30 minute in a bit of the pretending of reservoir, and active area is less, to whole horizontal segment
The recovery of permeability is not fine, the 3rd, the acid of high intensity is larger to drill tool corrosion, and acid solution also needs to after returning out ground prepare phase
The alkali liquor answered is neutralized, and environmental protection is caused with great unsafe factor.
Content of the invention
The purpose of the present invention be overcome existing acidizing flushing liquid to cause reservoir rock corrosion, increase the irreversible wound of reservoir
Evil, acid solution needs after returning row to neutralize it is impossible to meet the requirement of safety and environmental protection discharge.
For this reason, the invention provides a kind of temperature control type mud cake removal liquid, being made up of the raw material of following mass percent, having
Machine ester admixture 80%～90%, preservative 0.074%～0.1%, hydrochloric acid 0.00014%～0.0002%, calcium salt 5%～8%, balance of
Water.
A kind of temperature control type mud cake removal liquid, is made up of the raw material of following mass percent, organic ester admixture 85%, prevents
Rotten agent 0.085%, hydrochloric acid 0.00018%, calcium salt 7%, balance of water.
Described organic ester admixture is methyl formate, ethyl acetate, methyl lactate, two kinds or two kinds in ethyl acetate with
On.
Described preservative is methyl hydroxybenzoate or benzalkonium bromide.
Described calcium salt is calcium chloride or calcium nitrate.
Present invention also offers a kind of preparation method of temperature control type mud cake removal liquid, add first in the water of formula ratio and join
The calcium salt stirring and dissolving of side's amount prepares calcium saline solution, secondly sequentially add in a kettle. formula ratio organic ester admixture,
Hydrochloric acid, preservative are sufficiently stirred for, and are eventually adding calcium saline solution, after being sufficiently stirred for, that is, are obtained.
Present invention also offers a kind of application of temperature control type mud cake removal liquid, for, in acidizing flushing operation, consumption accounts for acid
Change the 15-25% of flushing fluid cumulative volume.
The invention has the beneficial effects as follows:
1st, this temperature control type mud cake removal liquid that the present invention provides, at normal temperatures, solution assumes neutrality, does not corrode drilling tool, enters ground
With the rising of temperature after layer, solution assumes acidity, removes the mud cake in borehole wall area, because solution has discharged acid after the row of returning
Property, so also assuming neutrality, beneficial to environment protection emission；
2nd, this temperature control type mud cake removal liquid, compared with existing high strength acid flushing fluid, simplifies conventional technique technique, reduces ground
Face operating risk, reaches the requirement of safety and environmental protection discharge, and in shaft bottom long action time, active area is big, can be clear well
Except the mud cake in borehole wall area, recover top layer permeability, subduction injury, improve completion reservoir properties feature；
3rd, this temperature control type mud cake removal liquid is used not only for horizontal well completion, and can be used for barefoot completion, gravel completion,
Sieve tube completion, well production increment, well workover completion practice and sandstone, lime rock stratum unfreezing operation.
To be described in further details below.
Specific embodiment
Embodiment 1:
In order to be overcome existing acidizing flushing liquid to cause reservoir rock corrosion, increase the irreversible injury of reservoir, acid solution returns row
Need afterwards to neutralize it is impossible to meet the requirement of safety and environmental protection discharge.The invention provides a kind of temperature control type mud cake removal liquid, by following matter
The raw material composition of amount percent, organic ester admixture 80%～90%, preservative 0.074%～0.1%, hydrochloric acid 0.00014%～
0.0002%, calcium salt 5%～8%, balance of water.
The invention has the characteristics that this removing liquid is at normal temperatures, solution ph is 5-6, assumes neutrality, does not corrode drilling tool, with
The rising of temperature, solution ph is gradually reduced, reach 2.2 about, solution assumes acidity, remove the mud cake in borehole wall area, return
Because solution has discharged acidity after row, solution ph is gradually increasing, and reaches 4-6, assumes neutrality, beneficial to environment protection emission.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide a kind of temperature control type mud cake removal liquid, former by following mass percent
Material forms, organic ester admixture 90%, preservative 0.074%, hydrochloric acid 0.00014%, calcium salt 5%, water 4.9%.
Preparation process:
The calcium salt stirring and dissolving adding formula ratio first in the water of formula ratio prepares calcium saline solution, secondly in a kettle. according to
The secondary organic ester admixture adding formula ratio, hydrochloric acid, preservative are sufficiently stirred for, and are eventually adding calcium saline solution, after being sufficiently stirred for,
It is obtained.
In the present embodiment, organic ester admixture is the compound of methyl formate and ethyl acetate, wherein, methyl formate and second
The mass ratio of acetoacetic ester is 1:1；Preservative is methyl hydroxybenzoate, and calcium salt is calcium chloride.
Embodiment 3:
On the basis of embodiment 1, present embodiments provide a kind of temperature control type mud cake removal liquid, former by following mass percent
Material forms, organic ester admixture 80%, preservative 0.1%, hydrochloric acid 0.0002%, calcium salt 8%, water 11.9%.
Preparation process:
The calcium salt stirring and dissolving adding formula ratio first in the water of formula ratio prepares calcium saline solution, secondly in a kettle. according to
The secondary organic ester admixture adding formula ratio, hydrochloric acid, preservative are sufficiently stirred for, and are eventually adding calcium saline solution, after being sufficiently stirred for,
It is obtained.
In the present embodiment, organic ester admixture is methyl formate, ethyl acetate, methyl lactate, the compound of ethyl acetate,
Wherein, methyl formate, ethyl acetate, methyl lactate, the mass ratio of ethyl acetate are 3.5:1:1:1；Preservative is benzalkonium bromide,
Calcium salt is calcium chloride.
Embodiment 4:
On the basis of embodiment 1, present embodiments provide a kind of temperature control type mud cake removal liquid, former by following mass percent
Material forms, organic ester admixture 85%, preservative 0.085%, hydrochloric acid 0.00018%, calcium salt 7%, water 7.9%.
Preparation process:
The calcium salt stirring and dissolving adding formula ratio first in the water of formula ratio prepares calcium saline solution, secondly in a kettle. according to
The secondary organic ester admixture adding formula ratio, hydrochloric acid, preservative are sufficiently stirred for, and are eventually adding calcium saline solution, after being sufficiently stirred for,
It is obtained.
In the present embodiment, organic ester admixture is methyl formate, methyl lactate, the compound of ethyl acetate, wherein, formic acid
Methyl ester, methyl lactate, the mass ratio of ethyl acetate are 2:1:1；Preservative is benzalkonium bromide, and calcium salt is calcium nitrate.
1. the performance test of temperature control type mud cake removal liquid:
The change detection of ph value under the conditions of temperature change for the embodiment 4 temperature control type mud cake removal liquid.
The condition of test is: takes sample 50ml, puts in glass beaker, be then gradually heated up, is supervised in real time with electronics ph meter
The change of the ph value of control solution, observes phenomenon, after reaching uniform temperature, after ph value stabilization, stops heating, continues to use electronics ph
The change of the ph value of meter monitor in real time solution, until sample temperature is down to room temperature.The ph value of record sample whole experiment process becomes
Change.The results are shown in Table 1.
Table 1 ph performance measurement
2. the mensure of the corrosion rate of temperature control mud cake removal liquid:
This test mud cake formula used is: 10%caco3(325 mesh)+1% fluid loss agent+0.3% xanthan gum.To press in this mud
After dehydration 30min, take out mud cake, drying is weighed stand-by.This sample is placed on four axle magnetic force heating stirrers, heats, will
The mud cake dried is put in the temperature control type mud cake removal liquid of embodiment 4, after question response is complete, takes out mud cake, drying is weighed, calculates
Corrosion rate.Whole Therapy lasted 6 hours.
Corrosion rate computing formula is as follows:
The results are shown in Table 2.
Table 2 corrosion rate measures
| Sequence number | Mud cake quality (g) before corrosion | Mud cake quality (g) after corrosion | Filter paper quality (g) | Corrosion rate (%) |
| 1 | 1.5082 | 1.0526 | 1.0100 | 91.45 |
| 2 | 1.4996 | 1.0609 | 1.0000 | 87.81 |
| 3 | 1.5126 | 1.0426 | 0.9900 | 89.93 |
| 4 | 1.5004 | 1.0348 | 1.0000 | 93.05 |
From table 1, table 2 as can be seen that temperature control type mud cake removal liquid ph value varies with temperature two changes, during under room temperature, ph value is close
Property, assume faintly acid after raising with temperature after reaching bottom stratum, because solution has discharged acidity after the row of returning, so also presenting
Neutrality, beneficial to environment protection emission.The experiment of corrosion rate is it can be seen that mud cake corrosion rate is more than 85%.
Embodiment 5:
On the basis of embodiment 1, present embodiments provide a kind of application of temperature control type mud cake removal liquid, make for acidizing flushing
In industry, consumption accounts for the 15-25% of acidizing flushing liquid cumulative volume.
Scene application shows, this temperature control type mud cake removal liquid is used not only for horizontal well completion, and can be used for naked
Eye completion, gravel completion, sieve tube completion, well production increment, well workover completion practice and sandstone, lime rock stratum unfreezing operation,
The original physical property of reservoir can be protected well, consumption few it is easy to implement, reservoir can be protected, the exploitation that again can reduce the later stage becomes
This, obtain good economic benefit and social benefit, be worthy of popularization.Convenient transportation simultaneously, preparation method and equipment needed thereby
Condition is simple.
The method and structure of various embodiments above not narration in detail belongs to the common knowledge of the industry, does not chat one by one here
State.
The only illustration to the present invention exemplified as above, does not constitute the restriction to protection scope of the present invention, all
It is that same or analogous design belongs within protection scope of the present invention with the present invention.
Claims (7)
1. a kind of temperature control type mud cake removal liquid it is characterised in that: be made up of the raw material of following mass percent, organic ester mix
Thing 80%～90%, preservative 0.074%～0.1%, hydrochloric acid 0.00014%～0.0002%, calcium salt 5%～8%, balance of water.
2. a kind of temperature control type mud cake removal liquid according to claim 1 it is characterised in that: former by following mass percent
Material forms, organic ester admixture 85%, preservative 0.085%, hydrochloric acid 0.00018%, calcium salt 7%, balance of water.
3. a kind of temperature control type mud cake removal liquid according to claim 1 it is characterised in that: described organic ester admixture be first
Two or more in sour methyl ester, ethyl acetate, methyl lactate, ethyl acetate.
4. a kind of temperature control type mud cake removal liquid according to claim 1 it is characterised in that: described preservative be Metagin
Ester or benzalkonium bromide.
5. a kind of temperature control type mud cake removal liquid according to claim 1 it is characterised in that: described calcium salt be calcium chloride or nitre
Sour calcium.
6. a kind of temperature control type mud cake removal liquid according to claim 1 preparation method it is characterised in that: first in formula
The calcium salt stirring and dissolving adding formula ratio in the water of amount prepares calcium saline solution, secondly sequentially adds formula ratio in a kettle.
Organic ester admixture, hydrochloric acid, preservative are sufficiently stirred for, and are eventually adding calcium saline solution, after being sufficiently stirred for, that is, are obtained.
7. a kind of temperature control type mud cake removal liquid according to claim 1 application it is characterised in that: for acidizing flushing make
In industry, consumption accounts for the 15-25% of acidizing flushing liquid cumulative volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610764520.9A CN106350046A (en) | 2016-08-30 | 2016-08-30 | Temperature control mud cake cleaning liquid and preparing method as well as application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610764520.9A CN106350046A (en) | 2016-08-30 | 2016-08-30 | Temperature control mud cake cleaning liquid and preparing method as well as application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106350046A true CN106350046A (en) | 2017-01-25 |
Family
ID=57855999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610764520.9A Pending CN106350046A (en) | 2016-08-30 | 2016-08-30 | Temperature control mud cake cleaning liquid and preparing method as well as application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106350046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922953A (en) * | 2019-12-04 | 2020-03-27 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Temperature response type filter cake removing completion fluid and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1977027A (en) * | 2004-03-27 | 2007-06-06 | 克宁索有限公司 | Process for disruption of filter cakes |
| US20070169938A1 (en) * | 2006-01-20 | 2007-07-26 | Halliburton Energy Services, Inc. | Methods of controlled acidization in a wellbore |
| US20080078549A1 (en) * | 2006-09-29 | 2008-04-03 | Halliburton Energy Services, Inc. | Methods and Compositions Relating to the Control of the Rates of Acid-Generating Compounds in Acidizing Operations |
| CN102399550A (en) * | 2011-01-27 | 2012-04-04 | 中国石油天然气股份有限公司 | Liquid formula used for in-depth acidification of high temperature carbonate rock |
| CN103380190A (en) * | 2011-02-16 | 2013-10-30 | 贝克休斯公司 | Composition and method for removing filter cake |
| CN104277820A (en) * | 2013-07-11 | 2015-01-14 | 中国石油化工股份有限公司 | High-temperature sandstone reservoir retarded acid |
| CN105295886A (en) * | 2014-08-01 | 2016-02-03 | 中国石油天然气股份有限公司 | Composite retarded acid |
| CN105849223A (en) * | 2013-11-07 | 2016-08-10 | 国际壳牌研究有限公司 | Thermally activated strong acids |
-
2016
- 2016-08-30 CN CN201610764520.9A patent/CN106350046A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1977027A (en) * | 2004-03-27 | 2007-06-06 | 克宁索有限公司 | Process for disruption of filter cakes |
| US20070169938A1 (en) * | 2006-01-20 | 2007-07-26 | Halliburton Energy Services, Inc. | Methods of controlled acidization in a wellbore |
| US20080078549A1 (en) * | 2006-09-29 | 2008-04-03 | Halliburton Energy Services, Inc. | Methods and Compositions Relating to the Control of the Rates of Acid-Generating Compounds in Acidizing Operations |
| CN102399550A (en) * | 2011-01-27 | 2012-04-04 | 中国石油天然气股份有限公司 | Liquid formula used for in-depth acidification of high temperature carbonate rock |
| CN103380190A (en) * | 2011-02-16 | 2013-10-30 | 贝克休斯公司 | Composition and method for removing filter cake |
| CN104277820A (en) * | 2013-07-11 | 2015-01-14 | 中国石油化工股份有限公司 | High-temperature sandstone reservoir retarded acid |
| CN105849223A (en) * | 2013-11-07 | 2016-08-10 | 国际壳牌研究有限公司 | Thermally activated strong acids |
| CN105295886A (en) * | 2014-08-01 | 2016-02-03 | 中国石油天然气股份有限公司 | Composite retarded acid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922953A (en) * | 2019-12-04 | 2020-03-27 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Temperature response type filter cake removing completion fluid and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102533232B (en) | Solid-phase-free multi-functional well completion working solution | |
| US20200123430A1 (en) | Non-invasive cement spacer fluid compositions, spacer fluid products, methods of well operation and well apparatus | |
| CN104558217B (en) | cross-linked starch for drilling fluid and preparation method thereof | |
| US20170015887A1 (en) | Smart lcm for strengthening earthen formations | |
| CN102070909A (en) | Cation modified asphalt and preparation method thereof | |
| CN104342105A (en) | Viscosified acid fluid and method for use thereof | |
| CN102536166B (en) | Method for deep treatment of oil layer through self-generation foam acidification | |
| CN105112036B (en) | Barium strontium calcium descaling and blockage relieving agent and preparation method thereof near wellbore zone | |
| CN104232041B (en) | A kind of oil-water well strong corrosion acidifying unblocking liquid of low leak-off and preparation method thereof | |
| CN107523287A (en) | A kind of combined high temperature acidification corrosion inhibitor based on pyridines quaternary ammonium salt | |
| CN105295886B (en) | A kind of composite retarded acid | |
| CN104612650A (en) | Oxidizing composite acid deep acidizing plugging removal method used for acidizing plugging removal of water injection well | |
| CN106190073B (en) | The multi-functional cleaning antiscale formula of the hypotonic complexity fouling reservoir of one kind and preparation method | |
| CN108559480A (en) | A kind of Reservoir Acidization augmented injection construction chelating agent and its preparation method and application | |
| CN103555296B (en) | Water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance and preparation method thereof | |
| CN104109510B (en) | A kind of Solid Free is for slurry completion protection liquid and preparation method thereof | |
| CN106350046A (en) | Temperature control mud cake cleaning liquid and preparing method as well as application | |
| WO2020019593A1 (en) | Acidizing liquid for corroding clay minerals and preparation method therefor | |
| CN108219767A (en) | A kind of offshore oilfield acid stimulation system and preparation method thereof | |
| CN107418547A (en) | One kind is based on the high-temperature acidification corrosion inhibitor of tribenzyl (2 benzyl) pyridine ammonium chloride | |
| CN105349123A (en) | Oil-in-water drilling fluid taking biodiesel as dispersion phase as well as preparation method and application thereof | |
| CN105385425A (en) | Palm oil base well drilling fluid and preparation method thereof | |
| CN101638575B (en) | High-temperature resistant thinner for drilling fluid and production method and use method thereof | |
| CN106433581B (en) | It is a kind of without soil reservoir drilling fluid mutually resistant to high temperatures and preparation method thereof | |
| CN104559948A (en) | Degradable fluid loss additive for oil-base drilling fluids and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |