CN105482788A - Novel drilling mud preparation method - Google Patents
Novel drilling mud preparation method Download PDFInfo
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- CN105482788A CN105482788A CN201410471451.3A CN201410471451A CN105482788A CN 105482788 A CN105482788 A CN 105482788A CN 201410471451 A CN201410471451 A CN 201410471451A CN 105482788 A CN105482788 A CN 105482788A
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- sodium
- bentonite
- drilling mud
- mass ratio
- water
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Abstract
The present invention discloses a novel drilling mud preparation method, which comprises: 1) carrying out a sodium modification treatment on sodium-based bentonite crude ore; 2) removing excess water from the sodium modified bentonite by using a water absorption material, and drying, wherein the dryness is 12.5%; 3) grinding the sodium-based bentonite, wherein the particle size of the obtained sodium-based bentonite powder is 200 mesh; and 4) uniformly mixing carboxymethyl cellulose and polyacrylamide according to a mass ratio of 25:1 to form a polymer, and carrying out sorting compounding on the obtained polymer and the powdery sodium-based bentonite, wherein a mass ratio of the sodium-based bentonite powder to the polymer is 100:2. According to the present invention, the novel drilling mud prepared through the method has characteristics of good fluidity, being the colloidal suspension state, good suspension property and good portability; the bentonite has extremely strong moisture absorption property, and can expand after absorbing water, wherein the expansion coefficient can achieve 30 times the own volume; the strong water retention property and the strong wall protection property are provided, such that the drilling problem of the long distance pipeline is effectively solved; and the important application value is provided.
Description
The present invention is specifically related to a kind of preparation method of drilling mud, relates to oil-drilling field.
Background technology
The feature of petroleum drilling technique is: well is dark, pressure is large, temperature is high, influence factor is many.In the past mainly by experience drilling well, began one's study the fifties factors and mutual relationship thereof that affect drilling speed and cost.Drilling well new technology, new theory constantly occur.Well direction must control in allowed band.According to oil-gas exploration, the palegeology condition of exploitation and requirement of engineering, point straight well and orientation well two class, the latter can be divided into general orientation well, horizontal well, cluster wells etc. again.。
Drilling fluid, is commonly called as mud, and English Translation is drillingmud, is acknowledged as the blood of oil drilling, plays very important effect in drilling operation.Therefore require very high to drilling fluid, mainly contain four aspects:
1. the requirement of drilling circulation
The requirement of drilling circulation to drilling fluid is pump pressure low (viscosity is low), and prop-carrying capacity strong (yield value is high), ejector priming forces down (gel strength is low), and lubricity is good, and frictional force is low, wear and tear little (solid particulate is few).
keep the stable of well
Pressure column and the reservoir pressure of the stratum drilling fluid drilled average out, and drilling fluid density is stablized; The pressure column of drilling fluid to be leaned on during Oil And Gas Formations During Drilling to carry out the pressure requirements drilling fluid density of balanced oil and gas suitable.Require that drilling fluid has the performance overcoming nonresistant strata, such as mud stone water-swelling causes well to shrink; Conglomerate, volcanics are met water and are caused across collapsing, and rock salt is met water and forms solution cavity etc., namely requires drilling fluid of different nature.
require drilling fluid protecting hydrocarbon zone
After hydrocarbon zone left by brill, drilling fluid contacts with hydrocarbon zone, for preventing drilling fluid damage hydrocarbon zone, require that the dehydration of drilling fluid is little, mud cake is thin (after drilling fluid dehydration, solid pressure difference solid particulate forms mud cake ring on the borehole wall), solid load hydration that is low, filtrate low (chemical action that filtrate occurs with the liquid in stratum after entering stratum) etc.
protection of the environment and ecology
Normal containing crude oil, diesel oil and various oils and containing a large amount of chemical processing agent in drilling fluid, for preventing drilling fluid on environment and the ecological impact that may cause, require to use harmless, nontoxic drilling fluid.The function of mud is a lot, mainly landwaste is carried into ground from shaft bottom.Along with making rapid progress of oil field scientific-technical progress, drilling fluid enters to develop into adapt to drilling well each side demand from only meeting bit drills.
1. bottom-hole cleaning, suspension cutting carring, keeps well to clean.
2. equilibrium strata pressure, stabilizing borehole, prevents well slough, blowout, leakage.
3. transmit water-horse power, to help drill bit breaking up rock.
4. for mud motor transmits power.
5. cool drill bit, drilling tool.
6. utilize drilling fluid to carry out geology, gas detection logging.
7. marine oil bores Well Completion Engineering of Oil Reservoirs, comprises geology, exploration, well cementation, running casing, well logging, and well logging etc., all need to be fulfiled assignment by the cooperation of mud.Along with the aperture of construction is increasing, crossing length is more and more longer, and the situation of boring more different geology also gets more and more.The process that aperture is less, crossing length is shorter is relatively low for the requirement of drilling mud, but passes through project along with what pass through the large and construction workshop section head in aperture, and conventional drilling mud can not be satisfied the demand.
Summary of the invention
For the weak point that above prior art exists, the object of this invention is to provide a kind of preparation method of drilling mud shaking, the probing problem of long-distance pipe can be solved.
Drilling mud shaking preparation method of the present invention:
1) sodium bentonite raw ore is carried out sodium process;
2) wilkinite good for sodium is passed through water-absorbing material, remove excessive moisture, then dry, dryness fraction is 12.5%;
3) the sodium bentonite abrasive dust of previous step, the granular size of bentonite in powder is 200 orders;
4) carboxymethyl cellulose is mixed rear formation polymkeric substance with polyacrylamide according to mass ratio 25:1, carry out sorting compound with Powdered sodium bentonite.The mass ratio of sodium bentonite powder and polymkeric substance is 100:2.
Utilize drilling mud shaking prepared by the present invention, good fluidity, in soliquid, suspend and Portability good, wilkinite has extremely strong water absorbability, water suction after expansion, expansion number can reach 30 times of own vol.Water-retentivity and retaining wall power by force, effectively solve the probing problem of long-distance pipe.There is significant application value.
specific embodiment
The object of this invention is to provide a kind of preparation method of drilling mud shaking, the probing problem of long-distance pipe can be solved.
Drilling mud shaking preparation method of the present invention:
1) sodium bentonite raw ore is carried out sodium process;
2) wilkinite good for sodium is passed through water-absorbing material, remove excessive moisture, then dry, dryness fraction is 12.5%;
3) the sodium bentonite abrasive dust of previous step, the granular size of bentonite in powder is 200 orders;
4) carboxymethyl cellulose is mixed rear formation polymkeric substance with polyacrylamide according to mass ratio 25:1, carry out sorting compound with Powdered sodium bentonite.The mass ratio of sodium bentonite powder and polymkeric substance is 100:2.
Claims (1)
1. drilling mud shaking preparation method: 1) sodium bentonite raw ore is carried out sodium process; 2) wilkinite good for sodium is passed through water-absorbing material, remove excessive moisture, then dry, dryness fraction is 12.5%; 3) the sodium bentonite abrasive dust of previous step, the granular size of bentonite in powder is 200 orders; 4) carboxymethyl cellulose is mixed rear formation polymkeric substance with polyacrylamide according to mass ratio 25:1, carry out sorting compound with Powdered sodium bentonite; The mass ratio of sodium bentonite powder and polymkeric substance is 100:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471451.3A CN105482788A (en) | 2014-09-17 | 2014-09-17 | Novel drilling mud preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471451.3A CN105482788A (en) | 2014-09-17 | 2014-09-17 | Novel drilling mud preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105482788A true CN105482788A (en) | 2016-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410471451.3A Pending CN105482788A (en) | 2014-09-17 | 2014-09-17 | Novel drilling mud preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105482788A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922949A (en) * | 2019-10-28 | 2020-03-27 | 北京中煤矿山工程有限公司 | Low specific gravity and high performance retaining wall slurry material for long horizontal freezing drilling in muddy clay and preparation method thereof |
-
2014
- 2014-09-17 CN CN201410471451.3A patent/CN105482788A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922949A (en) * | 2019-10-28 | 2020-03-27 | 北京中煤矿山工程有限公司 | Low specific gravity and high performance retaining wall slurry material for long horizontal freezing drilling in muddy clay and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |
|
| WD01 | Invention patent application deemed withdrawn after publication |