CN102703046B - Condensed sand carrying agent used for under-pressure oil gas well - Google Patents
Condensed sand carrying agent used for under-pressure oil gas well Download PDFInfo
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Abstract
The invention discloses a condensed sand carrying agent used for an under-pressure oil gas well, and the condensed sand carrying agent is applied to the sand wash of the oil gas well in an oil gas field. The condensed sand carrying agent is characterized by comprising the following components in percentage by weight: 1-1.5% of xanthan gum, 20-25% of efficient foaming agent LF-II, 0.5-1% of potassium chloride, 0.2-0.5% of sodium carbonate, 5-8% of high-water-loss plugging agent, 0.5-1% of phenol, 0.3-0.5% of epoxy chloropropane, 0.5-0.8% of ethanol, 5-7% of carboxymethyl starch, 0.5-1% of sodium hydrogen carbonate and the rest of clear water, and the sum of the percentages of all the components is a hundred percent. The condensed sand carrying agent has the effects that the condensed sand carrying agent has favorable water solubility; when the concentration is lower, a water-soluble glue solution shows the characteristics of a plastic fluid; when the concentration is higher, a system shows the characteristics of a pseudoplastic fluid; the pollution to an underground stratum does not exist; the condensed sand carrying agent is applicable to the sand wash under a pressure and the work in an under-pressure gas well; and the problem that the seepage loss is big is solved. The solution dosage is only 50% of that of a conventional routine sand washing solution, and the pollution of a sand carrying solution to the stratum is reduced.
Description
Technical field
The present invention relates to that oil-gas field recovers the oil, the production gas technology field, particularly a kind of chemical agent formula of under-voltage Oil/gas Well sand washing, be a kind of concentrated type transporting agent for under-voltage Oil/gas Well.
Background technology
The Oil/gas Well sand washing is effective measure and the necessary means that guarantees the stable yields of Oil/gas Well.At present in each oil and gas wells in oil fields sand washing construction, normal employing clear water or brine recycling well-flushing, sand washing, kill-job, prop-carrying capacity is poor aspect sand washing, in operation process, the stratum also there is certain pollution, especially larger to reservoir damage for the conventional sand washing of under-voltage Oil/gas Well, conventional sand cleaning fluid system density is higher, is prone to leakage, even can not set up normal well-flushing circulation.Conventional sand washing is used duration in operation process simultaneously, energy consumption is large, cost is high, and especially away from the Oil/gas Well in base, on-the-spot dosing difficulty is large.
Adopt the concentrated type foam to take sand for under-voltage Oil/gas Well and carry out foam sand wash and guaranteed on-the-spot sand washing school assignment quick, low cost can realize low pressure or negative-pressure cyclic simultaneously, in order to avoid leakage.Foam viscosity is high, and filter loss is few, and liquid composition is low, can greatly reduce the injury to payzone; The suspending power of foam is strong, can take shaft bottom and solid particulate or other foul on oil, casing wall out of; Can induce the immediate vicinity of wellbore booty to efflux, stop up to remove payzone, can also induce hydrocarbon flow simultaneously.
Summary of the invention
The objective of the invention is: a kind of concentrated type transporting agent for under-voltage Oil/gas Well is provided.Be used for outlying Oil/gas Well situ configuration sand-carrying agent and carry out sand washing, have efficient and conveniently, the characteristics that cost is low can be carried out sand washing with pressure and carry out sand washing in under-voltage gas well in construction, pollution-free to down-hole formation; Overcome common flushing fluid prop-carrying capacity poor, to the problem of formation contaminant.
The technical solution used in the present invention is:
One, the concentrated type transporting agent raw material for under-voltage Oil/gas Well comprises:
1, xanthan gum.Chemical name: monospore polyose biological polymer.
2, efficient aerating powder LF-II.Chemical composition: fatty amide and fatty alcohol-ether are through esterification, sulfonated products.(Wang Zhonghua chief editor oil field chemical application manual one book, Sinopec press the 170th page); Performance: this product is yellow or brown yellow transparent liquid.This product has that foaming power is strong, the pollution of good stability, anti-oil, salt and calcium ion, and higher resistance to elevated temperatures is arranged.Purposes: the every field that is used for oil drilling, well-flushing, pressure break, acidifying, thermal recovery and well workover and Development and Production.Be used as the whipping agent of foam drilling fluid in drilling well.Production unit: Haian County, Jiangsu Province is just reaching the chemical plant.
3, Repone K.
4, sodium carbonate.
5, high dehydration plugging agent.Chemical composition: cement, vegetable fibre, mineral fibre etc.(Wang Zhonghua chief editor oil field chemical application manual one book, Sinopec press the 148th page); Character: the easy moisture absorption caking of this product is to be composited by cement, vegetable fibre, mineral fibre and other auxiliary agents.Purposes: be mainly used in macropore plugging in drilling process, many spaces and fractured leakage are one of modal additive for drilling fluid.This agent can be used for water-blocking operation.Production unit: development chemical plant, Huixian City, Huixian City's space flight chemical industry one factory.
6, phenol.
7, epoxy chloropropane.
8, ethanol.
9, carboxymethyl starch, another name: CMS.(Zhang Guanghua chief editor oil field chemical one book, the 126th page of Chemical Industry Press); Character: general carboxymethyl starch is white powder, and fineness is not less than 98%, and moisture is not more than 13%, substitution value 0.3～0.6.In the time of 25 ℃, 2% sticks with paste liquid viscosity 330mPa.s, Ph=7～7.5.Industry preparation carboxymethyl starch principle and process: starch is swelling in basic solution, and sodium hydroxide is penetrated into the alkyl reaction on granule interior and mechanism unit, and part generates the precipitation sodium salt, and it is the active centre of ether reaction.Then, Starch Sodium and sodium chloroacetate carry out carboxymethylation reaction under alkaline condition, generate carboxymethyl starch.Purposes: the leak-off effect falls in the mud that is used as petroleum drilling in petroleum industry, has strong saline-alkaline tolerance.Generate unit: Puyang three power chemical general factories, Chengdu Chuan Feng chemical engineering limited liability company.
10, sodium bicarbonate.
11, water.
The concentrated type transporting agent that is used for under-voltage Oil/gas Well, each weight percentages of components:
1, xanthan gum: 1～1.5%;
2, efficient aerating powder LF-II (pore forming material): 20～25%;
3, Repone K (sticking steady agent): 0.5～1%;
4, sodium carbonate: 0.2～0.5%;
5, high dehydration plugging agent: 5～8%;
6, phenol: 0.5～1%;
7, epoxy chloropropane (auxiliary stabilizer): 0.3～0.5%;
8, ethanol 0.5～0.8%;
9, carboxymethyl starch: 5～7%;
10, sodium bicarbonate: 0.5～1%;
11, all the other are clear water, and each component percentages sum is absolutely.
Two, the preparation method who is used for the concentrated type transporting agent of under-voltage Oil/gas Well
Under normal temperature (20～30 ℃), add entry in the interior liquid storage tank that agitator is housed; Then add by weight successively xanthan gum, Repone K (sticking steady agent), sodium carbonate, carboxymethyl starch, high dehydration plugging agent by the dosing funnel in liquid storage tank, stir and be dissolved in the water by agitator; Then, add while stirring sodium bicarbonate, phenol.At last, add ethanol, epoxy chloropropane and efficient aerating powder LF-II, stir, make the concentrated type transporting agent for under-voltage Oil/gas Well.To pump into drum for the concentrated type transporting agent of under-voltage Oil/gas Well with impeller pump standby.
Summary is used for the using method of the concentrated type transporting agent of under-voltage Oil/gas Well: according to different well ' s conditions (reservoir pressure is different), Various Seasonal, pass through optimization design: pour in tank car before the concentrated type transporting agent construction that is used for under-voltage Oil/gas Well that will prepare, the dress clear water: being used for the concentrated type transporting agent of under-voltage Oil/gas Well and the weight ratio of clear water is 1:40～50.Sand washing scene in man-hour follows nitrogen injection to carry out the nitrogen foam sand washing.
Beneficial effect of the present invention: be used for the concentrated type transporting agent of under-voltage Oil/gas Well, have good water-solublely, when concentration less (0.1～0.2%), water-soluble glue is the characteristics of plastic fluid; During concentration large (0.3～1.0%), system is the characteristics of pseudoplastic fluid, viscosity is all unaffected between pH value 2～12, it is pollution-free to down-hole formation, be applicable to sand washing with pressure and in under-voltage gas well operation, solve the problem that common flushing fluid prop-carrying capacity is poor and wastage is large, during operation, the sand setting time obviously increases.Fluid volume is only 50% of former conventional sand cleaning fluid, has reduced sand-carrying agent to formation contaminant.Has operating cost low, the advantage that sand washing efficient is high.Main by implementing small-sized liquid dispensing device, improved the concentrated type transporting agent preparation one-time success rate that is used for under-voltage Oil/gas Well, have light, economical and practical characteristics, can complete 100 barrels of preparations that are used for the concentrated type transporting agent of under-voltage Oil/gas Well in 8 hours, individual well dosing cost is only 10% of former dosing, easy to operate, the dosing precision is high, and the feature of environmental protection is good, the operator safety performance is good, labour intensity is low.The present invention is used for the concentrated type transporting agent of under-voltage Oil/gas Well, more existing flushing fluid, have viscosity high, take sand than large, consumption sand, frictional resistance is little, cost is low, pollution-free without burn into, to advantages such as reservoir damage are little; Be applicable to pressure, under-voltage and all kinds of sand output wells.
Actual field effect of the present invention: continuous-tube nitrogen foam sand washing process on the Sebei Gas Field low-pressure gas well, the concentrated type transporting agent that is used for under-voltage Oil/gas Well on probation.Successfully having tested 45 mouthfuls, is all to implement under the condition of not kill-job of fixed tubular column, adopts continuous-tube in oil pipe or crosses oil pipe sand washing operation.Wherein 8 mouthfuls of wells are 2, and " sand washing in the pipe with small pipe diameter in oil pipe, 2 mouthfuls of wells have been implemented continuous-tube sand washing with pressure and have salvaged the underground throttle device integral process.Sand washing is constructed into power and reaches more than 95%, and measure is efficient to be reached more than 90%, and maximum is taken sand than rising to 30%, average individual well sand washing sand shortening engineering time 24h by 18%.After measure average individual well day producing natural gas 1.5～30,000 sides.Wherein have nearly 20 mouthfuls because sand buries the gas well that payzone causes stopping production, resume production and reached higher output after adopting the sand washing of continuous-tube nitrogen foam.It is low that the successful Application of this technique has been captured the Sebei Gas Field reservoir pressure, the technical barrier of conventional sand washing leakage.But compare the average reduction of erection time 60h of conventional sand washing operation, can save 50% operating cost, also have simultaneously the safety and environmental protection advantage; Operating Pressure is little to reservoir damage, in time recovers gas well deliverability after measure, has become the Main Means of Sebei Gas Field low-pressure gas well measure operation.
Embodiment
Embodiment 1: be used for the concentrated type transporting agent of under-voltage Oil/gas Well, each weight percentages of components:
1, xanthan gum: 1%;
2, efficient aerating powder LF-II (pore forming material): 20%;
3, Repone K (sticking steady agent): 0.5%;
4, sodium carbonate: 0.3%;
5, high dehydration plugging agent: 5%;
6, phenol: 0.5%;
7, epoxy chloropropane (auxiliary stabilizer): 0.3%;
8, ethanol 0.6%;
9, carboxymethyl starch: 7%;
10, sodium bicarbonate: 0.5%;
11, all the other are clear water (64.3%), and each component percentages sum is absolutely.
The preparation of the present embodiment: (25 ℃) at normal temperatures, adopt the small-sized liquid dispensing device dosing of development: 1m in the base
3Liquid storage tank, base fluid (clear water) is stored in 1m
3In liquid storage tank, then add by weight successively xanthan gum powder, sticking steady agent (Repone K), calcium carbonate, carboxymethyl starch, high dehydration plugging agent by the dosing funnel in liquid storage tank.Agitator is housed in liquid storage tank, makes the abundant swelling of glue (making simultaneously various additives evenly mix and dissolve with base fluid) by stirring, the limit edged stirs; Then add by weight successively Repone K, sodium bicarbonate, phenol.Add at last ethanol and pore forming material, select impeller pump, the concentrated type transporting agent that is used for under-voltage Oil/gas Well for preparing is pumped into 200 liters of drums.
Embodiment 1 result of use: use at puckery new R44-3 well: 1382.37 meters of this well artificials bottom of a well, reservoir pressure coefficient 0.77, gas well stops production because sand buries gas-producing zone, the formula and the production technique that adopt to be used for the concentrated type transporting agent of under-voltage Oil/gas Well: 600 kilograms of the concentrated type transporting agents that is used for under-voltage Oil/gas Well of preparation are that ratio is that the 1:40 scene makes sand cleaning fluid 30m in the ratio of concentrated solution and clear water
3, adopting the sand washing of coiled tubing nitrogen foam technique, foam density is controlled at 0.55～0.6g/cm
3, use liquid 25m
3, the construction once the success, the construction after gas well day producing natural gas 2.05 ten thousand sides.
Embodiment 2: be used for the concentrated type transporting agent of under-voltage Oil/gas Well, each weight percentages of components:
1, xanthan gum: 1.2%;
2, efficient aerating powder LF-II (pore forming material): 22%;
3, Repone K (sticking steady agent): 0.5%;
4, sodium carbonate: 0.3%;
5, high dehydration plugging agent: 5%;
6, phenol: 0.5%;
7, epoxy chloropropane (auxiliary stabilizer): 0.3%;
8, ethanol 0.6%;
9, carboxymethyl starch: 5%;
10, sodium bicarbonate: 0.5%;
11, all the other are clear water (64.1%), and each component percentages sum is absolutely.
The preparation method is identical with embodiment 1.
Embodiment 2 results of use: use at puckery 3-26 well: 1533 meters of this well artificials bottom of a well, reservoir pressure coefficient 0.73, gas well stops production because sand buries gas-producing zone.Adopt formula and the production technique of the concentrated type transporting agent that is used for under-voltage Oil/gas Well, 800 kilograms of the concentrated type transporting agents that is used for under-voltage Oil/gas Well of preparation are that ratio is that the 1:40 scene makes sand cleaning fluid 45m in the ratio of the concentrated type transporting agent that is used for under-voltage Oil/gas Well and clear water
3, adopting the sand washing of coiled tubing nitrogen foam technique, foam density is controlled at 0.55～0.6g/cm
3, use liquid 40m
3, the construction once the success, the construction after gas well day producing natural gas 2.66 ten thousand sides.
Embodiment 3: be used for the concentrated type transporting agent of under-voltage Oil/gas Well, each weight percentages of components:
1, xanthan gum: 1.5%;
2, efficient aerating powder LF-II (pore forming material): 21%;
3, Repone K (sticking steady agent): 0.9%;
4, sodium carbonate: 0.4%;
5, high dehydration plugging agent: 8%;
6, phenol: 0.9%;
7, epoxy chloropropane (auxiliary stabilizer): 0.4%;
8, ethanol 0.5%;
9, carboxymethyl starch: 6%;
10, sodium bicarbonate: 0.6%;
11, water: 59.8%.
The preparation method is identical with embodiment 1.
Embodiment 3 results of use: platform H5-1 well is used: this well is horizontal well, 2731.12 meters of artificials bottom of a well, and reservoir pressure coefficient 1.01, gas well stops production because sand buries gas-producing zone.The formula and the production technique that adopt to be used for the concentrated type transporting agent of under-voltage Oil/gas Well: preparation is used for 2000 kilograms of the concentrated type transporting agents of under-voltage Oil/gas Well, be that ratio is 1:50 in the concentrated type transporting agent that is used for under-voltage Oil/gas Well and the ratio of clear water, the scene makes sand cleaning fluid 105m
3, adopting the sand washing of coiled tubing nitrogen foam technique, foam density is controlled at 0.8～0.9g/cm
3, use liquid 100m
3, the construction once the success, the construction after gas well day producing natural gas 21.29 ten thousand sides.
Embodiment 4: be used for the concentrated type transporting agent of under-voltage Oil/gas Well, each weight percentages of components:
1, xanthan gum: 1.4%;
2, efficient aerating powder LF-II (pore forming material): 20%;
3, Repone K (sticking steady agent): 0.7%;
4, sodium carbonate: 0.4%;
5, high dehydration plugging agent: 7%;
6, phenol: 0.8%;
7, epoxy chloropropane (auxiliary stabilizer): 0.4%;
8, ethanol 0.8%;
9, carboxymethyl starch: 7%;
10, sodium bicarbonate: 0.9%;
11, water: 60.6%.
The preparation method is with identical with embodiment 1 with using method.
Claims (2)
1. concentrated type transporting agent that is used for under-voltage Oil/gas Well, each weight percentages of components:
1, xanthan gum: 1～1.5%;
2, efficient aerating powder LF-II: 20～25%;
3, Repone K: 0.5～1%;
4, sodium carbonate: 0.2～0.5%;
5, high dehydration plugging agent: 5～8%;
6, phenol: 0.5～1%;
7, epoxy chloropropane: 0.3～0.5%;
8, ethanol 0.5～0.8%;
9, carboxymethyl starch: 5～7%;
10, sodium bicarbonate: 0.5～1%;
11, all the other are clear water, and each component percentages sum is absolutely.
2. the concentrated type transporting agent for under-voltage Oil/gas Well according to claim 1, it is characterized in that: the preparation method is: at normal temperatures, add entry in the interior liquid storage tank that agitator is housed; Then add by weight successively xanthan gum, Repone K, sodium carbonate, carboxymethyl starch, high dehydration plugging agent by the dosing funnel in liquid storage tank, stir and be dissolved in the water by agitator; Then, add while stirring sodium bicarbonate, phenol; At last, add ethanol, epoxy chloropropane and efficient aerating powder LF-II, stir, make the concentrated type transporting agent for under-voltage Oil/gas Well; To pump into drum for the concentrated type transporting agent of under-voltage Oil/gas Well with impeller pump standby.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210194727 CN102703046B (en) | 2012-06-13 | 2012-06-13 | Condensed sand carrying agent used for under-pressure oil gas well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210194727 CN102703046B (en) | 2012-06-13 | 2012-06-13 | Condensed sand carrying agent used for under-pressure oil gas well |
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| CN102703046A CN102703046A (en) | 2012-10-03 |
| CN102703046B true CN102703046B (en) | 2013-11-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4207194A (en) * | 1977-06-17 | 1980-06-10 | The Dow Chemical Company | Chemical wash with fluid loss control |
| US4681165A (en) * | 1984-03-01 | 1987-07-21 | Dowell Schlumberger Incorporated | Aqueous chemical wash compositions |
| CN1858147A (en) * | 2006-01-26 | 2006-11-08 | 东营盛世石油科技有限责任公司 | Oil well sand washing plugging agent and plugging method |
| US7670994B1 (en) * | 2007-06-13 | 2010-03-02 | Catalyst Partners, Inc. | Method for treating oil and gas wells |
| CN102399545A (en) * | 2011-12-06 | 2012-04-04 | 中国石油天然气股份有限公司 | Sand-flushing well-cleaning agent for oil well |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2307144C2 (en) * | 2001-12-03 | 2007-09-27 | Шлюмбергер Текнолоджи Б.В. | Non-harmful liquid for reducing absorption of drill mud and method for application thereof |
-
2012
- 2012-06-13 CN CN 201210194727 patent/CN102703046B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4207194A (en) * | 1977-06-17 | 1980-06-10 | The Dow Chemical Company | Chemical wash with fluid loss control |
| US4681165A (en) * | 1984-03-01 | 1987-07-21 | Dowell Schlumberger Incorporated | Aqueous chemical wash compositions |
| CN1858147A (en) * | 2006-01-26 | 2006-11-08 | 东营盛世石油科技有限责任公司 | Oil well sand washing plugging agent and plugging method |
| US7670994B1 (en) * | 2007-06-13 | 2010-03-02 | Catalyst Partners, Inc. | Method for treating oil and gas wells |
| CN102399545A (en) * | 2011-12-06 | 2012-04-04 | 中国石油天然气股份有限公司 | Sand-flushing well-cleaning agent for oil well |
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| CN102703046A (en) | 2012-10-03 |
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