CN103320099A - Petroleum drilling fluid viscosity reducing agent as well as preparation method and application method thereof - Google Patents
Petroleum drilling fluid viscosity reducing agent as well as preparation method and application method thereof Download PDFInfo
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- CN103320099A CN103320099A CN2013102331926A CN201310233192A CN103320099A CN 103320099 A CN103320099 A CN 103320099A CN 2013102331926 A CN2013102331926 A CN 2013102331926A CN 201310233192 A CN201310233192 A CN 201310233192A CN 103320099 A CN103320099 A CN 103320099A
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Abstract
The invention relates to a petroleum drilling fluid processing agent and provides a petroleum drilling fluid viscosity reducing agent as well as a preparation method and an application method thereof. The petroleum drilling fluid viscosity reducing agent is obtained by using the following method which comprises the following steps: firstly, respectively weighing 10-15 parts of humic acid, 10-15 parts of an alkali and 70-80 parts of lime in parts by weight; then mixing the humic acid, the alkali and the lime to obtain the petroleum drilling fluid viscosity reducing agent. The viscosity reducing agent applicable to water base drilling fluid can control the hydration and cross-linking degrees of clay and the processing agent in the drilling fluid, so that the viscosity of the drilling fluid is controlled within a suitable range and the rheological property stable period of the drilling fluid is long; the petroleum drilling fluid viscosity reducing agent is unique in composition, abundant in raw material sources, low in price, and easy and convenient to produce and apply.
Description
Technical field
The present invention relates to the petroleum drilling fluid treatment agent, is a kind of petroleum drilling fluid viscosity-depression agent and preparation method thereof and using method.
Background technology
Drilling fluid is a kind of circulating fluid of using in the Process of Oil Well Drilling, is called visually the blood of drilling well.In the drilling process, drilling fluid at first is pumped in the drilling tool, then discharges through bit port, returns ground by the drilling tool outer ring space again.Drilling fluid is in above-mentioned working cycle, and one of function is that the landwaste with the drill bit fragmentation in time is carried into ground, remove landwaste after, drilling fluid enters the pit shaft circulation again.
Drilling fluid is divided into water-base drilling fluid, gentle base drilling fluid three classes of oil base drilling fluid, and wherein water-base drilling fluid is most widely used general.Water-base drilling fluid is comprised of water, clay, treatment agent etc.Drilling process requires drilling fluid to possess good performance, and one of them is the flowability (term claims " rheological ") that will keep good, and one of rheological index namely is our usually said viscosity, and viscosity can represent with funnel viscosity, apparent viscosity etc. again.The drilling well practical situation are that along with drilling depth increases, the well temperature increases, the fine landwaste that enters in the drilling fluid is more and more, and clay and treatment agent occur excessively crosslinked, and drilling fluid rheology may be worse and worse, even lost flowability, this just needs in time control, and drilling fluid is carried out viscosity reduction.
Summary of the invention
The invention provides a kind of petroleum drilling fluid viscosity-depression agent and preparation method thereof and using method, overcome the deficiency of above-mentioned prior art, it can effectively solve the problem of water-base drilling fluid rheological variation in the drilling process even lost flowability.
One of technical scheme of the present invention realizes by following measures: a kind of petroleum drilling fluid viscosity-depression agent, obtain as follows: take by weighing respectively by weight 10 parts to 15 parts of humic acidss, 10 parts to 15 parts in alkali, 70 parts to 80 parts in lime first, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
Two of technical scheme of the present invention realizes by following measures: a kind of preparation method of petroleum drilling fluid viscosity-depression agent, carry out as follows: take by weighing respectively by weight 10 parts to 15 parts of humic acidss, 10 parts to 15 parts in alkali, 70 parts to 80 parts in lime first, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
The below is two further optimization and/or improvements to one of foregoing invention technical scheme and technical scheme:
Above-mentioned humic acids can be the technical grade humic acids.
Above-mentioned alkali can be technical grade sodium hydroxide or technical grade potassium hydroxide.
Above-mentioned lime can be technical grade unslaked lime.
Three of technical scheme of the present invention realizes by following measures: a kind of using method of petroleum drilling fluid viscosity-depression agent, during use, directly add the petroleum drilling fluid viscosity-depression agent in the drilling fluid, and to make the concentration of petroleum drilling fluid viscosity-depression agent in drilling fluid be 0.01kg/L to 0.05kg/L.
The present invention is applicable to the viscosity-depression agent of water-base drilling fluid, and it can control aquation, the crosslinking degree of drilling fluid medium clay soil, treatment agent, thereby the viscosity of control drilling fluid makes drilling fluid rheology longer stable period in suitable scope; The present invention forms uniqueness, and the starting material source is abundant, and price is low, produces and use simple and convenient.
Embodiment
The present invention is not subjected to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and practical situation.
The invention will be further described below in conjunction with embodiment:
Embodiment 1, this petroleum drilling fluid viscosity-depression agent obtains as follows: take by weighing respectively by weight 10 parts to 15 parts of humic acidss, 10 parts to 15 parts in alkali, 70 parts to 80 parts in lime first, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
Embodiment 2, this petroleum drilling fluid viscosity-depression agent obtains as follows: take by weighing respectively by weight first 10 parts in 10 parts of humic acidss or 15 parts, alkali or 15 parts, 70 parts or 80 parts in lime, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
Embodiment 3, the preparation method of this petroleum drilling fluid viscosity-depression agent carries out as follows: take by weighing respectively by weight 10 parts to 15 parts of humic acidss, 10 parts to 15 parts in alkali, 70 parts to 80 parts in lime first, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
Embodiment 4, the preparation method of this petroleum drilling fluid viscosity-depression agent carries out as follows: take by weighing respectively by weight first 10 parts in 10 parts of humic acidss or 15 parts, alkali or 15 parts, 70 parts or 80 parts in lime, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.The below is two further optimization and/or improvements to one of foregoing invention technical scheme and technical scheme:
Embodiment 5, and as the optimization of above-described embodiment, humic acids is the technical grade humic acids.
Embodiment 6, and as the optimization of above-described embodiment, alkali is technical grade sodium hydroxide or technical grade potassium hydroxide.
Embodiment 7, and as the optimization of above-described embodiment, lime is technical grade unslaked lime.
Embodiment 8, and the using method of this petroleum drilling fluid viscosity-depression agent during use, directly adds the petroleum drilling fluid viscosity-depression agent in the drilling fluid, and to make the concentration of petroleum drilling fluid viscosity-depression agent in drilling fluid be 0.01kg/L to 0.05kg/L.
The petroleum drilling fluid viscosity-depression agent that above-described embodiment is obtained carries out viscosity reduction test detection, and the average result that obtains is as follows:
1, gets the petroleum drilling fluid viscosity-depression agent that above-described embodiment obtains and be mixed with the viscosity-depression agent aqueous solution that concentration is 0.5g/ml.
Get 6 kinds of on-the-spot actual use, water-base drilling fluids that need viscosity reduction, representative, every kind some parts, every part of 1000ml:
Drilling fluid 1: approximately 55 ℃ of well depth 1500m, well temperature, density 1.22 g/m
3
, funnel viscosity (FV) 120s drilling fluid;
Drilling fluid 2: approximately 55 ℃ of well depth 1500m, well temperature, density 1.22 g/m
3
, funnel viscosity (FV) 120s drilling fluid;
Drilling fluid 3: approximately 90 ℃ of well depth 3200m, well temperature, density 1.55 g/m
3
, funnel viscosity (FV) 180s drilling fluid;
Drilling fluid 4: approximately 90 ℃ of well depth 3200m, well temperature, density 1.55 g/m
3
, funnel viscosity (FV) 180s drilling fluid;
Drilling fluid 5: approximately 120 ℃ of well depth 5000m, well temperature, density 1.81 g/m
3
, the drilling fluid that do not measure for drip of funnel viscosity (FV);
Drilling fluid 6: approximately 120 ℃ of well depth 5000m, well temperature, density 1.81 g/m
3
, the drilling fluid that do not measure for drip of funnel viscosity (FV).
Add the 20ml viscosity-depression agent aqueous solution as test sample 1 in drilling fluid 1, the concentration that can calculate test sample 1 PetroChina Company Limited.'s drilling fluid thinner is 0.01g/ml, adds as a comparison sample 1 of 20ml water in drilling fluid 2;
Add the 60ml viscosity-depression agent aqueous solution as test sample 2 in drilling fluid 3, the concentration that can calculate test sample 2 PetroChina Company Limited.'s drilling fluid thinners is 0.03g/ml, adds as a comparison sample 2 of 60ml water in drilling fluid 4;
Add the 100ml viscosity-depression agent aqueous solution as test sample 3 in drilling fluid 5, the concentration that can calculate test sample 2 PetroChina Company Limited.'s drilling fluid thinners is 0.05g/ml, adds as a comparison sample 3 of 100ml water in drilling fluid 6;
To test sample 1 and contrast sample 1 16h that wears out that under 55 ℃ of conditions, rolls, and then be cooled to and measure respectively the apparent viscosity value under the normal temperature, and calculate apparent viscosity average and viscosity break ratio mean value; To test sample 2 and contrast sample 2 16h that wears out that under 90 ℃ of conditions, rolls, and then be cooled to and measure respectively the apparent viscosity value under the normal temperature, and calculate apparent viscosity average and viscosity break ratio mean value; To test sample 3 and contrast sample 3 16h that wears out that under 120 ℃ of conditions, rolls, and then be cooled to and measure respectively the apparent viscosity value under the normal temperature, and calculate apparent viscosity average and viscosity break ratio mean value.The apparent viscosity value is lower, and viscosity reducing effect is better.Experimental result sees Table 1.
Can find out from experimental data, for the drilling fluid of varying environment, when the concentration of petroleum drilling fluid viscosity-depression agent in drilling fluid was 0.01g/ml to 0.05g/ml, viscosity break ratio mean value all reached more than 50%.
The test of table 1 viscosity reduction detects data and result
| Experimental group | Apparent viscosity mean value, mPa.s | Viscosity break ratio mean value, % |
| Test sample 1 | 31 | 54 |
| Contrast sample 1 | 68 | - |
| Test sample 2 | 43 | 56 |
| Contrast sample 2 | 97 | - |
| Test sample 3 | 71 | 51 |
| Contrast sample 3 | 146 | - |
Remarks: viscosity break ratio (%)=100 * (contrast sample apparent viscosity-test sample apparent viscosity)/contrast sample apparent viscosity.
In addition, during actual the use, only need directly the petroleum drilling fluid viscosity-depression agent to be added in the drilling fluid, making the concentration of petroleum drilling fluid viscosity-depression agent in drilling fluid is that 0.01kg/L to 0.05kg/L gets final product, do not need the petroleum drilling fluid viscosity-depression agent is mixed with the aqueous solution, it is to compare for convenient test sample and contrast sample that this experimental technique is mixed with first the aqueous solution.
Claims (9)
1. petroleum drilling fluid viscosity-depression agent, it is characterized in that obtaining as follows: take by weighing respectively by weight 10 parts to 15 parts of humic acidss, 10 parts to 15 parts in alkali, 70 parts to 80 parts in lime first, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
2. petroleum drilling fluid viscosity-depression agent according to claim 1 is characterized in that humic acids is the technical grade humic acids.
3. petroleum drilling fluid viscosity-depression agent according to claim 1 and 2 is characterized in that alkali is technical grade sodium hydroxide or technical grade potassium hydroxide.
4. according to claim 1 and 2 or 3 described petroleum drilling fluid viscosity-depression agents, it is characterized in that lime is technical grade unslaked lime.
5. the preparation method of a petroleum drilling fluid viscosity-depression agent, it is characterized in that carrying out as follows: take by weighing respectively by weight 10 parts to 15 parts of humic acidss, 10 parts to 15 parts in alkali, 70 parts to 80 parts in lime first, obtain the petroleum drilling fluid viscosity-depression agent after then humic acids, alkali and lime being mixed.
6. the preparation method of petroleum drilling fluid viscosity-depression agent according to claim 5 is characterized in that humic acids is the technical grade humic acids.
7. according to claim 5 or the preparation method of 6 described petroleum drilling fluid viscosity-depression agents, it is characterized in that alkali is technical grade sodium hydroxide or technical grade potassium hydroxide.
8. according to claim 5 or the preparation method of 6 or 7 described petroleum drilling fluid viscosity-depression agents, it is characterized in that lime is technical grade unslaked lime.
9. one kind according to claim 1 and 2 or the using method of 3 or 4 described petroleum drilling fluid viscosity-depression agents, when it is characterized in that using, directly add the petroleum drilling fluid viscosity-depression agent in the drilling fluid, and to make the concentration of petroleum drilling fluid viscosity-depression agent in drilling fluid be 0.01kg/L to 0.05kg/L.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753284A (en) * | 2017-01-05 | 2017-05-31 | 中国科学院化学研究所 | A kind of viscosity reducer for crude oil and preparation method thereof |
| CN106833555A (en) * | 2017-01-24 | 2017-06-13 | 福州大学 | Method and its application of high-efficient drilling fluid thinner are prepared using percolate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106333A (en) * | 1985-08-19 | 1987-02-18 | 张沐恩 | The mill by coacervation and precipitation of alkali and lignin in the black liquid |
| US20090305912A1 (en) * | 2008-06-06 | 2009-12-10 | Mcdonald Michael J | Method for mitigating the salinity of drilling waste |
-
2013
- 2013-06-13 CN CN2013102331926A patent/CN103320099A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106333A (en) * | 1985-08-19 | 1987-02-18 | 张沐恩 | The mill by coacervation and precipitation of alkali and lignin in the black liquid |
| US20090305912A1 (en) * | 2008-06-06 | 2009-12-10 | Mcdonald Michael J | Method for mitigating the salinity of drilling waste |
Non-Patent Citations (1)
| Title |
|---|
| 彭振斌: "腐植酸类处理剂在钻井中的应用(Ⅲ)―腐植酸类处理剂作用机理初探", 《西部探矿工程》, no. 01, 31 December 1990 (1990-12-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753284A (en) * | 2017-01-05 | 2017-05-31 | 中国科学院化学研究所 | A kind of viscosity reducer for crude oil and preparation method thereof |
| CN106753284B (en) * | 2017-01-05 | 2019-03-19 | 中国科学院化学研究所 | A kind of viscosity reducer for crude oil and preparation method thereof |
| CN106833555A (en) * | 2017-01-24 | 2017-06-13 | 福州大学 | Method and its application of high-efficient drilling fluid thinner are prepared using percolate |
| CN106833555B (en) * | 2017-01-24 | 2019-05-31 | 福州大学 | The method and its application of drilling fluid thinner are prepared using landfill leachate |
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Application publication date: 20130925 |