CN102086381A - Saturated salt water drilling fluid - Google Patents
Saturated salt water drilling fluid Download PDFInfo
- Publication number
- CN102086381A CN102086381A CN2009102165953A CN200910216595A CN102086381A CN 102086381 A CN102086381 A CN 102086381A CN 2009102165953 A CN2009102165953 A CN 2009102165953A CN 200910216595 A CN200910216595 A CN 200910216595A CN 102086381 A CN102086381 A CN 102086381A
- Authority
- CN
- China
- Prior art keywords
- drilling fluid
- percent
- saturated salt
- water drilling
- base slurry
- 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
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to saturated salt water drilling fluid, which comprises base slurry, wherein sulfonated phenolic humic acid chromium is added in the base slurry. Based on mass percentage, the sulfonated phenolic humic acid chromium content is controlled to be between 2 and 5 percent. The base slurry consists of 4 percent of sodium bentonite slurry, 0.5 percent of poly anioniccellulose, 8 percent of sulfonated methypheuo formald-ehyde, 3 percent of walchowite, 20 percent of NaCl and 7 percent of KCl. The drilling fluid can reduce viscosity and improve the rheological property of the high-density saturated salt water drilling fluid system.
Description
Technical field
The present invention relates to a kind of saturated salt-water drilling fluid.
Background technology
Clay particle in the drilling fluid is under high temperature action, and the dispersive phenomenon is called the high temperature dissemination of clay particle automatically.Practice finds that water base bentonite suspension wilkinite particle dispersity behind high temperature increases, and specific surface increases, and particle concentration increases, and it is big that apparent viscosity and shear force (quiet, yield value) also become thereupon.Experiment simultaneously finds that also the high temperature dispersive ability of clay particle and its aquation dispersive ability adapt, i.e. sodium bentonite＞calcium bentonite＞kaolin＞sepiolite.And the suspensoid of any clay in oil all do not seen the high temperature dispersion phenomenon.Therefore, can think that the high temperature in the drilling fluid disperses to remain in essence aquation and disperses, high temperature has only intensified this effect.Generally speaking, above-mentioned arbitrary factor all will influence the rheological of high-density water-based drilling liquid system, because they all will be got in touch by this medium of water and with water (as the suction dissolving, disperse, the suction swelling, dissolving, form hydration shell etc.) and combination water, free water in the high-density water-based drilling liquid system is reduced, thereby strengthened between solid phase and the solid phase, between solid phase and the liquid phase, between liquid phase and the liquid phase, reticulated structure and solid phase, resistance to flow between the liquid phase, improved the viscosity effect of high-density water-based drilling liquid system, its flowability is weakened even lost flowability, finally cause the unmanageable situation of high-density water-based drilling liquid system rheological.These factors can strengthen its influence degree because of high temperature action, cause high-density water-based drilling liquid system rheological to worsen, and can't safeguard, control difficulty.High temperature makes original at low temperatures non-incident variation between each component itself and component in the drilling fluid, vigorous reaction not, inapparent influence all becomes and has intensified, if also have salt concurrently, calcium, drilling cuttings, pollutions such as sour gas, these pollutions also can be exacerbated because of high temperature action, synthesis result is inevitable seriously to be changed, infringement so that the original performance of completely destroy drilling fluid, and this influence is irreversible permanent change, show as the stabilizing power that drilling fluid system is subjected to high temperature action (or drilling fluid opposing high temperature destructive ability) and weaken, promptly the thermostability of drilling fluid system reduces.General realize reflecting in use well head changes of properties of drilling fluid (sometimes even be exactly the import and export changes of properties) through the variation of high temperature action front and back performances (identical conditions mensuration) with drilling fluid.At the sea, Mississippi, in a bite deep-well, beat Φ 157.5mm well interval with the complete oily drilling fluid that international drilling fluid company provides.This interval is a payzone, degree of depth 6309.4m.The base oil of drilling fluid is a diesel oil, and the density of drilling fluid is 2.0246g/cm
3, plastic viscosity is 32mPas, and yield value is 4.72Pa, and elctrical stability is 1380V, and the HTHP filter loss is 10.8ml.Bored predetermined well section smoothly with this drilling fluid.Owing to the HTHP filter loss is reduced to 13ml from 23, successfully controlled the leakage of colloidal solution.For the rheological of controlling drilling fluid has added a large amount of organophilic clays.The final densities of drilling fluid has reached 2.04g/cm
3, drilling fluid has left standstill 16d in the down-hole during logging well, and downhole temperature at that time is 213 ℃.If use the emulsion breaking drilling fluid,, be difficult to again the turn on pump circulation after the termination of pumping, and turn on pump is very smooth once more with complete oily drilling fluid because of drilling fluid condenses in the down-hole.
In drilling process, all must reaming no matter adopt the drilling fluid of much density to creep into plastic formations such as saline bed, ooze layer.This practice by the nearly hundred mouthfuls of wells in oil field, Tarim Basin proves.The high-density water-base drilling fluid can only reduce the creep speed of plastic formation.When had just opened on the stratum, reservoir stress and creep speed were very big, the very fast undergauge of well.Reaming in the drilling process is scraped the rock that draws the borehole wall will prune this part indentation pit shaft.Simultaneously, reservoir stress discharges gradually, and the difference of reservoir stress and drilling well liquid columnpressure reduces gradually, and creep speed is more and more littler, disappears until stress-difference, and creep stops.
Summary of the invention
The technical problem to be solved in the present invention has provided a kind of saturated salt-water drilling fluid, can significantly improve the rheological of drilling fluid.
The technical scheme that the present invention solve the technical problem employing is:
A kind of saturated salt-water drilling fluid comprises the base slurry, adds sulphonated phenol humic acids chromium in the described base slurry.
Described sulphonated phenol humic acids chromium is controlled at 2-5% by percentage to the quality.
Described base slurry is made up of 4% sodium bentonite slurry, 0.5% Polyanionic Cellulose, 8% sulfonated-pheno-formoldehyde resin, 3% valchovite, 20%NaCl and 7%KCl.
Preferably, described sulphonated phenol humic acids chromium is controlled at 3% by percentage to the quality.
The invention has the beneficial effects as follows:
The present invention adds sulphonated phenol humic acids chromium (PSC-1) as the flow pattern stablizer in drilling fluid, it also can effectively break space grid structure to a certain extent, reaches the viscosity reduction purpose, significantly improves the rheological of high-density saturated salt-water drilling fluid system.
Embodiment
A kind of saturated salt-water drilling fluid comprises the base slurry, adds sulphonated phenol humic acids chromium in the described base slurry.
Described sulphonated phenol humic acids chromium is controlled at 2-5% by percentage to the quality.
Described base slurry is made up of 4% sodium bentonite slurry, 0.5% Polyanionic Cellulose, 8% sulfonated-pheno-formoldehyde resin, 3% valchovite, 20%NaCl and 7%KCl.
Described sulphonated phenol humic acids chromium is controlled at 3% by percentage to the quality.
The sulphonated phenol humic acids chromium (PSC-1) that add different amounts in the drilling fluid system to the drilling fluid system Effect on Performance see Table 1, table 2.
Table 1 sulphonated phenol humic acids chromium dosage preferred (before aging)
Table 2 sulphonated phenol humic acids chromium dosage preferred (aging back)
Determine that by the experimental data of table 1, table 2 the optimum dosage of sulphonated phenol humic acids chromium (PSC-1) in system is 3%.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, to any simple modification, equivalent variations that above embodiment did, all falls within protection scope of the present invention on every foundation technical spirit of the present invention.
Claims (4)
1. a saturated salt-water drilling fluid comprises the base slurry, it is characterized in that, adds sulphonated phenol humic acids chromium in the described base slurry.
2. according to right 1 described a kind of saturated salt-water drilling fluid, it is characterized in that described sulphonated phenol humic acids chromium is controlled at 2-5% by percentage to the quality.
3. according to right 1 described a kind of saturated salt-water drilling fluid, it is characterized in that described base slurry is made up of 4% sodium bentonite slurry, 0.5% Polyanionic Cellulose, 8% sulfonated-pheno-formoldehyde resin, 3% valchovite, 20%NaCl and 7%KCl.
4. according to right 2 described a kind of saturated salt-water drilling fluids, it is characterized in that described sulphonated phenol humic acids chromium is controlled at 3% by percentage to the quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102165953A CN102086381A (en) | 2009-12-07 | 2009-12-07 | Saturated salt water drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102165953A CN102086381A (en) | 2009-12-07 | 2009-12-07 | Saturated salt water drilling fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102086381A true CN102086381A (en) | 2011-06-08 |
Family
ID=44098387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102165953A Pending CN102086381A (en) | 2009-12-07 | 2009-12-07 | Saturated salt water drilling fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102086381A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504773A (en) * | 2011-11-15 | 2012-06-20 | 西南石油大学 | Saturated salt water drilling fluid for deep wells and extra-deep wells |
| CN104087272A (en) * | 2014-05-30 | 2014-10-08 | 中国石油化工集团公司 | Composite saturated brine drilling fluid capable of resisting CO3<2-> and HCO3<-> pollution |
| CN105018052A (en) * | 2015-08-17 | 2015-11-04 | 成都理工大学 | Low-solid-phase low-temperature polymer drilling fluid |
| CN105601251A (en) * | 2015-12-17 | 2016-05-25 | 中国二十二冶集团有限公司 | Antifreeze slurry preparation method |
-
2009
- 2009-12-07 CN CN2009102165953A patent/CN102086381A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504773A (en) * | 2011-11-15 | 2012-06-20 | 西南石油大学 | Saturated salt water drilling fluid for deep wells and extra-deep wells |
| CN102504773B (en) * | 2011-11-15 | 2013-06-19 | 西南石油大学 | Saturated salt water drilling fluid for deep wells and extra-deep wells |
| CN104087272A (en) * | 2014-05-30 | 2014-10-08 | 中国石油化工集团公司 | Composite saturated brine drilling fluid capable of resisting CO3<2-> and HCO3<-> pollution |
| CN105018052A (en) * | 2015-08-17 | 2015-11-04 | 成都理工大学 | Low-solid-phase low-temperature polymer drilling fluid |
| CN105601251A (en) * | 2015-12-17 | 2016-05-25 | 中国二十二冶集团有限公司 | Antifreeze slurry preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2961922B1 (en) | Method of providing fluid loss, using whole basil seeds | |
| CN103045210B (en) | High-efficiency plugging oil-base drilling fluid and preparation method thereof | |
| CA1098690A (en) | Process for fracturing well formations using aqueous gels | |
| US3747681A (en) | Hydraulic fracturing process using polyethylene oxide based fracturing fluid | |
| CN103232839A (en) | Water shutoff agent applicable to high-temperature high-salt oil reservoir water shutoff profile control | |
| US4120361A (en) | Method for reducing the permeability of subterranean formations to brines | |
| BR0316581B1 (en) | SELF-GENERATING FLUID FOR CIRCULATION THROUGH A DRILLING WELL DURING DRILLING OPERATIONS; AND METHOD FOR CONTROLING HYDROCARBON PRODUCTION FROM A DRILLING WELL DURING DRILLING OPERATIONS | |
| EA022202B1 (en) | Methods and aqueous based wellbore fluids for reducing wellbore fluid loss and filtrate loss | |
| US4926943A (en) | Phenolic and naphtholic ester crosslinked polymeric gels for permeability profile control | |
| CN102086381A (en) | Saturated salt water drilling fluid | |
| CN103642473A (en) | Polymer saturated salt water drilling solution suitable for drilling gas storage warehouse | |
| US9790416B2 (en) | Drilling fluid compositions and methods for use thereof in subterranean formations | |
| WO2021113056A1 (en) | Methods and materials for reducing lost circulation in a wellbore | |
| US3724565A (en) | Method of controlling lost circulation | |
| CN102086378A (en) | Drilling fluid helping to protect oil-gas bed | |
| CN106047316A (en) | Water-based drilling fluid suitable for high well temperature and low formation pressure coefficient | |
| CN105038736A (en) | Positive-charged polyglycol anti-collapse drilling fluid | |
| CN114621737A (en) | Water-based drilling fluid system and preparation method thereof | |
| US20190352559A1 (en) | Forming proppant-free channels in a proppant pack | |
| Wu et al. | Research and Application of Retreatment Technology to Tap Remaining Oil in Chang Qing Low Permeability Oilfield | |
| US20230203361A1 (en) | Wellbore stability compositions comprising nanoparticles | |
| CN106190066A (en) | A kind of water-base drilling fluid being applicable to low well temperature high formation pressure coefficient | |
| Luo et al. | Some problems in the exploration and exploitation low permeability of oil and gas resources in China | |
| CA2944340A1 (en) | Compositons and methods for curing lost circulation | |
| AU2012393530B2 (en) | Drilling fluid compositions and methods for use thereof in subterranean formations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110608 |