CN102703046A - 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 fld oil recovery, production gas technology field, the chemical agent prescription of particularly a kind of under-voltage oil gas well sand washing is a kind of concentrated type transporting agent that is used for under-voltage oil gas well.
Background technology
The sand washing of oil gas well 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 salt water flush, sand washing, kill-job, prop-carrying capacity is poor aspect sand washing, in the operation process also there is certain pollution on the stratum; Especially bigger for the conventional sand washing of under-voltage oil gas well to reservoir damage; Conventional sand cleaning fluid system density is higher, is prone to leakage, even can not set up normal well-flushing circulation.Conventional sand washing simultaneously in the operation process with duration, energy consumption is big, cost is high, especially away from the oil gas well in base, on-the-spot dosing difficulty is big.
Adopt the concentrated type foam to take sand for under-voltage oil gas well and carry out the foam sand washing and guaranteed that on-the-spot sand washing operation is quick, low cost can realize the circulation of low pressure or negative pressure simultaneously, in order to avoid leakage.Foam viscosity is high, and filter loss is few, and liquid composition is low, can significantly reduce the injury to payzone; The foamy suspending power is strong, can take shaft bottom and solid particulate or other foul on oil, the casing wall out of; Can induce the immediate vicinity of wellbore booty to efflux, stop up, can also induce hydrocarbon flow simultaneously to remove payzone.
Summary of the invention
The objective of the invention is: a kind of concentrated type transporting agent that is used 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 with in the construction and press sand washing and in under-voltage gas well, carry out sand washing, and are pollution-free to down-hole formation; It is poor to overcome common flushing fluid prop-carrying capacity, to the stratum pollution problems.
The technical scheme that the present invention adopts is:
One, the concentrated type transporting agent raw material that is used for under-voltage oil gas well comprises:
1, XG 550.Chemical name: monospore polyose XC polymer.
2, efficient aerating powder LF-II.Chemical ingredients: fatty amide and fatty alcohol-ether are through esterification, sulfonated products.(Wang Zhonghua chief editor oil field chemical application manual one book, the 170th page of Sinopec press); Performance: these article are yellow or brown yellow transparent liquid.These article have 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.In drilling well, be used as the whipping agent of foam drilling fluid.Production unit: Haian County, Jiangsu Province is just reaching the chemical plant.
3, Repone K.
4, yellow soda ash.
5, high dehydration plugging agent.Chemical ingredients: cement, vegetable fibre, mineral fibre etc.(Wang Zhonghua chief editor oil field chemical application manual one book, the 148th page of Sinopec press); Character: these article are prone to moisture absorption caking, are to be composited by cement, vegetable fibre, mineral fibre and other auxiliary agents.Purposes: be mainly used in macropore plugging in the 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, CMS, another name: CMS.(Zhang Guanghua chief editor oil field chemical one book, the 126th page of Chemical Industry Press); Character: general CMS is a 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.Industrial preparation CMS principle and process: starch is swelling in basic soln, and sodium hydroxide is penetrated into the alkyl reaction on granule interior and the mechanism unit, and part generates the deposition sodium salt, and it is ether reactive activity center.Then, sodium starch and sodium chloroacetate carry out carboxymethylation reaction under alkaline condition, generate CMS.Purposes: the leak-off effect falls in the mud that is used as petroleum drilling in the petroleum industry, has strong saline-alkaline tolerance.Generate unit: Puyang three power chemical general factories, Chengdu Chuan Feng chemical engineering Ltd.
10, sodium hydrogencarbonate.
11, water.
The concentrated type transporting agent that is used for under-voltage oil gas well, each weight percentages of components:
1, XG 550: 1～1.5%;
2, efficient aerating powder LF-II (pore forming material): 20～25%;
3, Repone K (sticking steady agent): 0.5～1%;
4, yellow soda ash: 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, CMS: 5～7%;
10, sodium hydrogencarbonate: 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 ℃), in the interior liquid storage tank that whisking appliance is housed, add entry; Then through the dosing funnel in liquid storage tank successively by weight adding XG 550, Repone K (sticking steady agent), yellow soda ash, CMS, high dehydration plugging agent, stir and be dissolved in the water through whisking appliance; Then, add sodium hydrogencarbonate, phenol while stirring.At last, add ethanol, epoxy chloropropane and efficient aerating powder LF-II, stir, make the concentrated type transporting agent that is used for under-voltage oil gas well.It is subsequent use that the concentrated type transporting agent that will be used for under-voltage oil gas well with impeller pump pumps into drum.
Summary is used for the method for use 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 the 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, good water-solubility is arranged, when concentration less (0.1～0.2%), water-soluble glue is the characteristics of plastic fluid; During concentration big (0.3～1.0%); System is the characteristics of pseudoplastic fluid; Viscosity is all unaffected between pH value 2～12, and it is pollution-free to down-hole formation, is applicable to that band is pressed sand washing and in under-voltage gas well operation; Solve common flushing fluid prop-carrying capacity difference and the big problem of wastage, the sand setting time obviously increases during operation.Fluid volume is merely 50% of former conventional sand cleaning fluid, has reduced sand-carrying agent to formation contaminant.It is low to have operating cost, the advantage that sand washing efficient is high.Main through implementing small-sized liquid dispensing device; Improve the concentrated type transporting agent preparation one-time success rate that is used for under-voltage oil gas well, had light, economical and practical characteristics, can accomplish 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 merely 10% of former dosing; Easy to operate, dosing precision height, and the feature of environmental protection is good, and 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 the viscosity height, take sand than big, consumption sand, frictional resistance is little, cost is low, no burn into is pollution-free, to advantages such as reservoir damage are little; Be applicable to that band is pressed, under-voltage and all kinds of sand output well.
Actual field effect of the present invention: on the Sebei Gas Field low-pressure gas well, manage the nitrogen foam sand washing process continuously, be used for the concentrated type transporting agent of under-voltage oil gas well.Successfully having tested 45 mouthfuls, all is under the condition of not kill-job of fixed tubular column, to implement, and employing is managed continuously in oil pipe or crossed oil pipe sand washing operation.Wherein 8 mouthfuls of wells are 2, and " sand washing in the little caliber in the oil pipe, 2 mouthfuls of wells have been implemented continuous tube and have been pressed sand washing and salvage the underground throttle device integral process.Sand washing construction success ratio 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 the measure average individual well day producing natural gas 1.5～30,000 sides.Wherein have nearly 20 mouthfuls because of sand buries the gas well that payzone causes stopping production, adopt and to resume production after the pipe nitrogen foam sand washing continuously and reached higher output.It is low that the successful Application of this technology 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 practice thrift 50% opex, also have the safety and environmental protection advantage simultaneously; Operating Pressure is little to reservoir damage, in time recovers gas well deliverability after the 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, XG 550: 1%;
2, efficient aerating powder LF-II (pore forming material): 20%;
3, Repone K (sticking steady agent): 0.5%;
4, yellow soda ash: 0.3%;
5, high dehydration plugging agent: 5%;
6, phenol: 0.5%;
7, epoxy chloropropane (auxiliary stabilizer): 0.3%;
8, ethanol 0.6%;
9, CMS: 7%;
10, sodium hydrogencarbonate: 0.5%;
11, all the other are clear water (64.3%), and each component percentages sum is absolutely.
The preparation of 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 the liquid storage tank, then through the dosing funnel in liquid storage tank successively by weight adding XG 550 powder, sticking steady agent (Repone K), lime carbonate, CMS, high dehydration plugging agent.Whisking appliance is housed in the liquid storage tank, makes the abundant swelling of glue (making various additives and base fluid uniform mixing and dissolving simultaneously) through stirring, the limit edged stirs; Then successively by weight adding Repone K, sodium hydrogencarbonate, phenol.Add ethanol and pore forming material at last, select impeller pump for use, 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 of sand buries gas-producing zone; Employing is used for the prescription and the production technique of 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 makes sand cleaning fluid 30m for the 1:40 scene in the ratio of liquid concentrator and clear water
3, adopting the sand washing of coiled tubing nitrogen foam technology, foam density is controlled at 0.55～0.6g/cm
3, use liquid 25m
3, construction is success once, construction back 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, XG 550: 1.2%;
2, efficient aerating powder LF-II (pore forming material): 22%;
3, Repone K (sticking steady agent): 0.5%;
4, yellow soda ash: 0.3%;
5, high dehydration plugging agent: 5%;
6, phenol: 0.5%;
7, epoxy chloropropane (auxiliary stabilizer): 0.3%;
8, ethanol 0.6%;
9, CMS: 5%;
10, sodium hydrogencarbonate: 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 of sand buries gas-producing zone.Employing is used for the prescription and the production technique of the concentrated type transporting agent of 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 makes sand cleaning fluid 45m for the 1:40 scene in the ratio of 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 technology, foam density is controlled at 0.55～0.6g/cm
3, use liquid 40m
3, construction is success once, construction back 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, XG 550: 1.5%;
2, efficient aerating powder LF-II (pore forming material): 21%;
3, Repone K (sticking steady agent): 0.9%;
4, yellow soda ash: 0.4%;
5, high dehydration plugging agent: 8%;
6, phenol: 0.9%;
7, epoxy chloropropane (auxiliary stabilizer): 0.4%;
8, ethanol 0.5%;
9, CMS: 6%;
10, sodium hydrogencarbonate: 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 a horizontal well, 2731.12 meters of artificials bottom of a well, and reservoir pressure coefficient 1.01, gas well stops production because of sand buries gas-producing zone.Employing is used for the prescription and the production technique of 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; Ratio in concentrated type transporting agent that is used for under-voltage oil gas well and clear water is that ratio is 1:50, and the scene makes sand cleaning fluid 105m
3, adopting the sand washing of coiled tubing nitrogen foam technology, foam density is controlled at 0.8～0.9g/cm
3, use liquid 100m
3, construction is success once, construction back 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, XG 550: 1.4%;
2, efficient aerating powder LF-II (pore forming material): 20%;
3, Repone K (sticking steady agent): 0.7%;
4, yellow soda ash: 0.4%;
5, high dehydration plugging agent: 7%;
6, phenol: 0.8%;
7, epoxy chloropropane (auxiliary stabilizer): 0.4%;
8, ethanol 0.8%;
9, CMS: 7%;
10, sodium hydrogencarbonate: 0.9%;
11, water: 60.6%.
The preparation method is with identical with embodiment 1 with method of use.
Claims (2)
1. concentrated type transporting agent that is used for under-voltage oil gas well, each weight percentages of components:
1, XG 550: 1～1.5%;
2, efficient aerating powder LF-II (pore forming material): 20～25%;
3, Repone K (sticking steady agent): 0.5～1%;
4, yellow soda ash: 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, CMS: 5～7%;
10, sodium hydrogencarbonate: 0.5～1%;
11, all the other are clear water, and each component percentages sum is absolutely.
2. the concentrated type transporting agent that is used for under-voltage oil gas well according to claim 1, it is characterized in that: the preparation method is: at normal temperatures, in the interior liquid storage tank that whisking appliance is housed, add entry; Then through the dosing funnel in liquid storage tank successively by weight adding XG 550, Repone K, yellow soda ash, CMS, high dehydration plugging agent, stir and be dissolved in the water through whisking appliance; Then, add sodium hydrogencarbonate, phenol while stirring.At last, add ethanol, epoxy chloropropane and efficient aerating powder LF-II, stir, make the concentrated type transporting agent that is used for under-voltage oil gas well.It is subsequent use that the concentrated type transporting agent that will be used for under-voltage oil gas well with impeller pump pumps into drum.
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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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| 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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Citations (6)
| 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 |
| US20030166471A1 (en) * | 2001-12-03 | 2003-09-04 | Mathew Samuel | Non-damaging fluid-loss pill and method of using the same |
| 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 |
-
2012
- 2012-06-13 CN CN 201210194727 patent/CN102703046B/en active Active
Patent Citations (6)
| 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 |
| US20030166471A1 (en) * | 2001-12-03 | 2003-09-04 | Mathew Samuel | Non-damaging fluid-loss pill and method of using the same |
| 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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| CN102703046B (en) | 2013-11-06 |
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