CN102093853A - Leak protection plugging agent used during drilling for remarkably enhancing plugging effect - Google Patents
Leak protection plugging agent used during drilling for remarkably enhancing plugging effect Download PDFInfo
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- CN102093853A CN102093853A CN2009102167323A CN200910216732A CN102093853A CN 102093853 A CN102093853 A CN 102093853A CN 2009102167323 A CN2009102167323 A CN 2009102167323A CN 200910216732 A CN200910216732 A CN 200910216732A CN 102093853 A CN102093853 A CN 102093853A
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Abstract
The invention discloses a leak protection plugging agent used during drilling for remarkably enhancing plugging effect. The plugging agent comprises the following components in percentage by weight: 16.0 to 17.0 percent of 2-methyl-2-acrylamidopropanesulfonic acid, acrylic acid and acrylamide, 80.0 to 82.0 percent of water and the balance of initiator and cross linking agent. The effect of plugging along with drilling and leakage can be achieved, the plugging agent has high plugging rate and high loading capacity, and the plugging effect of well drilling is remarkably enhanced.
Description
Technical field
The present invention relates to a kind of drill-feeding plugging agent that significantly improves plugging effect.
Background technology
For improving the drilling well working efficiency, reduce the loss of working fluids such as activity duration and mud, minimizing to the injury of reservoir etc. obtaining maximum economic benefits, lost circulation additive technology the method that provides that addresses this problem is provided, it is with boring with stifled a kind of leakage stopping technology in drilling engineering.
Drill-feeding plugging agent is development, the good class leak-stopping agent of result of use in recent years both at home and abroad.Existing at present with boring 801 plugging agents, it is the powder-like product that forms through the composite processing of scientific approach with multiple macromolecular compounds such as Chinese bandoline wood powder (a kind of timber that contains vegetable jelly forms through pulverizing, and it contains Mierocrystalline cellulose, xylogen, poly-pentose etc.), humate, carboxymethyl celluloses.The NFU plugging agent, it is composite and be equipped with powdery or the granulated product that the inert material of different varieties, different grain size, different dosages forms through scientific approach with multiple macromolecular compounds such as nanmu root powder (a kind of Purpleback Murdannia thicket tree root that contains vegetable jelly forms through pulverizing), humic acids high-valency metal salt, starch sodium carboxymethyl, polyacrylamides.The NFDF8012 plugging agent, it is through composite powdery or the granulated product that forms and form with addition of the inert material of difference amount, different grain size, different varieties of scientific formula, scientific approach with multiple macromolecular compounds such as nanmu root powder, humic acids high-valency metal salt or derivatives thereof, ammonium methylcellulose gum, polyacrylamide, leather powder.These drill-feeding plugging agents in the geology coalfield in 23 provinces in the whole nation, district, more than 300 unit of industries such as metallurgy, coloured, nuclear industry, oil, chemical industry, building materials use.Find that by research and rig-site utilization drill-feeding plugging agent has following advantage:
When (1) leakage takes place in drilling well, can accomplish that with leaking with stifled, with brill, the back 30min that generally feeds intake takes effect, and need stop the time for the treatment of hardly with stifled.
(2) shutoff success ratio height, the bearing capacity of leakage channel is strong after the shutoff, is difficult for repeating leakage after the drill-feeding plugging agent leak stopping.
(3) it both can be used as plugging agent, can be used as nonclay flush fluid or mud conditioner again and used, and it does not only destroy the performance of washing fluid, and can also improve the adjustment property of flush fluid.
(4) it cooperates relevant material (as inert material, sea-tangle etc.), adopts the different comprehensive regulations such as blocking method leakages, can handle various leakages.
(5) this treatment agent has anti-salt property and certain heat-resisting property preferably, and effect is best in the stratum of well depth 2～3 kms.
(6) it has oilness, anti-collapse property, retaining wall effect preferably.
(7) it can cooperate some material to make special slurries to administer special bad ground.
(8) using method is easy, consumption is few, cost is low, can directly add in the mud circulation, leave standstill or pressure sealing, also can be made into the slurries pumping, also can be made into thick slurries from the aperture or handling machinery give, also can make leak stopping ball throwing etc.
(9) material source is wide, and is nontoxic, harmless, pollution-free.
In recent years, very fast in leak-proof leak-stopping Study on Technology and application facet development both at home and abroad, developed multiple patching materials, developed the drilling fluid system of multiple leak-proof leak-stopping, wherein bridge blinding and gel blocking technology have obtained using more widely.But these methods also do not solve the root problem of leakage, mainly are that bearing capacity is poor.Reason is that the grain size distribution of conventional plugging agent is unreasonable, and particle shape is bad with the form fit in the crack of being blocked up, duct, lacks the reactive force that stretches into the borehole wall, greatly reduces shutoff efficient.And the hydroexpanding body plugging agent can reach this reactive force, improves the bearing capacity of the borehole wall.
Hydroexpanding body claims super-strong moisture absorbing resin (super Absorbent Resin is called for short SAR) again, is a kind of novel functional high-polymer patching materials, has high suction, water conservation and pressure-bearing function.It is a kind of cancellated high molecular synthetic resin with multiple geometrical shape, and water-swellable also forms the elastogel with certain intensity, has good temperature resistance, salt resistance and stability.Hydroexpanding body can use separately or mix use to control the leakage of drilling fluid with other patching materialss.The hydroexpanding body particle is under ambient pressure, elastic deformation takes place easily enter crack or blowhole, be detained and produce and stop up, still can continue water-swelling after particle enters drop ply simultaneously, thereby prevention drilling fluid leakage, strengthened plugging effect, the filling effect of hydroexpanding body in the crack improved the intensity on leakage stratum.Compare with traditional patching materials; the hydroexpanding body consumption is few, and it is simple and convenient to construct, and has good shut-off capacity; be the novel material of a kind of very promising leak stopping and protection reservoir to some carbonate cracks, cavernous formation especially, be suitable for the plugging operations of fissured formation.
Preventing to have unique advantage aspect perviousness and the fractured leakage with boring leak-proof sealing agent.Its less investment, method is simple, does not need to stop to bore to handle, and has reduced the treatment time and the expense of oil gas leakage significantly, is significant for improving the drilling speed of missing the stratum and reducing drilling cost.
Summary of the invention
Purpose of the present invention provides a kind of drill-feeding plugging agent that significantly improves plugging effect in order to overcome the deficiencies in the prior art and defective, and this drill-feeding plugging agent can reach with boring with stifled, with leaking with stifled, the sealing ratiod height, bearing capacity is big, has significantly improved the plugging effect of drilling well.
Purpose of the present invention is achieved through the following technical solutions: a kind of drill-feeding plugging agent that significantly improves plugging effect, comprise 2-acrylamido-2-methyl propane sulfonic acid sodium, vinylformic acid, acrylamide, initiator and linking agent, by weight percentage, 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide account for 16.0%～17.0%, water accounts for 80.0%～82.0%, and surplus is initiator and linking agent.
Above-mentioned 2-methyl-2-acrylamido propanesulfonic acid: vinylformic acid: the mass ratio of acrylamide is 1: 2: 7.
Initiator: the weight ratio of linking agent is 5: 1.
As a preferred embodiment of the present invention, by weight percentage, 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide account for 16.7%, and water accounts for 81.0%, and surplus is initiator and linking agent.
Described initiator is Na
2SO
3
Described linking agent is a N,N methylene bis acrylamide.
In sum, the invention has the beneficial effects as follows: can reach with boring with stifled, with leaking with stifled, the sealing ratiod height, bearing capacity is big, has significantly improved the plugging effect of drilling well.
Embodiment
Below in conjunction with embodiment, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
Embodiment:
The present invention relates to a kind of drill-feeding plugging agent that significantly improves plugging effect, comprise 2-acrylamido-2-methyl propane sulfonic acid sodium, vinylformic acid, acrylamide, initiator and linking agent, by weight percentage, 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide account for 16.0%～17.0%, water accounts for 80.0%～82.0%, and surplus is initiator and linking agent; By weight, 2-methyl-2-acrylamido propanesulfonic acid: vinylformic acid: acrylamide is 1: 2: 7, initiator: linking agent is 5: 1.
In order to obtain the mass percent of best 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide, the present invention tests.This experiment is 10%, 11.1%, 12.5%, 14.3% in the mass percent of 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide, carries out under 16.7%, 20%, 25% the situation, and the result of drill-feeding plugging agent performance is as shown in the table:
| Mass percent (%) | 10 | 11.1 | 12.5 | 14.3 | 16.7 | 20 | 25 |
| Product strength | Very poor | Very poor | A little less than | Generally | Moderate | Greatly | Crisp |
| Reaction times (h) | 6 | 5 | 3 | 1 | 0.6 | 0.6 | 0.2 |
| Rate of expansion | 51 | 57 | 71 | 101 | 128 | 92 | 73 |
As can be seen from the above table, along with the increase of monomer concentration, the intensity of hydroexpanding body increases gradually, and the time of reaction shortens, and when concentration reaches 25%, almost produces implode.And the imbibition ability of hydroexpanding body afterwards reduces along with the increase of monomer concentration increases earlier, and monomer concentration is to reach maximum at 16.7% o'clock.This is because monomer concentration when too high, is difficult to heat radiation on the one hand, and implode easily takes place, on the other hand under high conversion, and reaction rate accelerates, chain transfer reaction increases, and branching and the aggravation of self-crosslinking degree have reduced absorbent; And monomer concentration is crossed when hanging down, and then speed of reaction is slow, and molecular weight of product is little, and soluble part is many, and absorbent is variation also.Therefore, the span of 2-methyl of the present invention-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide mass percent is 16.0%～17.0%, and is preferably 16.7%.
As mentioned above, just can realize the present invention preferably.
Claims (6)
1. drill-feeding plugging agent that significantly improves plugging effect, it is characterized in that, comprise 2-acrylamido-2-methyl propane sulfonic acid sodium, vinylformic acid, acrylamide, initiator and linking agent, by weight percentage, 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide account for 16.0%～17.0%, water accounts for 80.0%～82.0%, and surplus is initiator and linking agent.
2. a kind of drill-feeding plugging agent that significantly improves plugging effect according to claim 1 is characterized in that, by weight, 2-methyl-2-acrylamido propanesulfonic acid: vinylformic acid: acrylamide is 1: 2: 7.
3. a kind of drill-feeding plugging agent that significantly improves plugging effect according to claim 1 is characterized in that, by weight, initiator: linking agent is 5: 1.
4. according to claim 1,2 or 3 described a kind of drill-feeding plugging agents that significantly improve plugging effect, it is characterized in that by weight percentage, 2-methyl-2-acrylamido propanesulfonic acid, vinylformic acid, acrylamide account for 16.7%, water accounts for 81.0%, and surplus is initiator and linking agent.
5. according to claim 1,2 or 3 described a kind of drill-feeding plugging agents that significantly improve plugging effect, it is characterized in that described initiator is Na
2SO
3
6. according to claim 1,2 or 3 described a kind of drill-feeding plugging agents that significantly improve plugging effect, it is characterized in that described linking agent is a N,N methylene bis acrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102167323A CN102093853A (en) | 2009-12-14 | 2009-12-14 | Leak protection plugging agent used during drilling for remarkably enhancing plugging effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102167323A CN102093853A (en) | 2009-12-14 | 2009-12-14 | Leak protection plugging agent used during drilling for remarkably enhancing plugging effect |
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| CN102093853A true CN102093853A (en) | 2011-06-15 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603985A (en) * | 2011-10-19 | 2012-07-25 | 中国石油化工股份有限公司 | High-temperature-resistant while-drilling plugging agent and preparation method thereof |
| CN102911647A (en) * | 2012-10-30 | 2013-02-06 | 中国石油化工股份有限公司 | Temporary plugging agent for drilling fluid and preparation method of temporary plugging agent |
| CN103113863A (en) * | 2013-02-09 | 2013-05-22 | 大庆合正化工有限公司 | Impervious blocking agent |
| WO2015018203A1 (en) * | 2013-08-09 | 2015-02-12 | 西南石油大学 | Plugging agent and preparation method thereof |
| CN104449613A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工集团公司 | Water-absorbent resin temporary plugging agent and preparation method thereof |
| CN106281268A (en) * | 2016-08-12 | 2017-01-04 | 中国海洋石油总公司 | A kind of organic diverting agent of high temperature resistance and preparation method |
| CN106947448A (en) * | 2017-03-20 | 2017-07-14 | 濮阳市易发化工有限公司 | A kind of high permeability zone profile control agent and preparation method thereof |
| CN109184615A (en) * | 2018-08-15 | 2019-01-11 | 中国石油天然气股份有限公司 | A kind of sandy conglomerate bodies Selective Water Plugging method and application |
| CN109825269A (en) * | 2019-03-12 | 2019-05-31 | 中国石油大学(华东) | Shear loading type GEL USED FOR PLUGGING WELL LOST CIRCULATION and the preparation method and application thereof |
| CN111349248A (en) * | 2020-04-13 | 2020-06-30 | 西南石油大学 | Branched sulfamic acid nano plugging agent and water-based drilling fluid |
| CN113105876A (en) * | 2020-01-13 | 2021-07-13 | 中国石油化工股份有限公司 | Drilling well plugging agent, preparation method and application thereof |
| CN113651915A (en) * | 2020-08-26 | 2021-11-16 | 中国石油大学(北京) | Gel polymer for bionic while-drilling pressure-bearing leaking stoppage drilling fluid |
-
2009
- 2009-12-14 CN CN2009102167323A patent/CN102093853A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603985A (en) * | 2011-10-19 | 2012-07-25 | 中国石油化工股份有限公司 | High-temperature-resistant while-drilling plugging agent and preparation method thereof |
| CN102911647A (en) * | 2012-10-30 | 2013-02-06 | 中国石油化工股份有限公司 | Temporary plugging agent for drilling fluid and preparation method of temporary plugging agent |
| CN102911647B (en) * | 2012-10-30 | 2015-09-02 | 中国石油化工股份有限公司 | Temporary plugging agent for drilling fluid and preparation method thereof |
| CN103113863A (en) * | 2013-02-09 | 2013-05-22 | 大庆合正化工有限公司 | Impervious blocking agent |
| WO2015018203A1 (en) * | 2013-08-09 | 2015-02-12 | 西南石油大学 | Plugging agent and preparation method thereof |
| CN104449613A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工集团公司 | Water-absorbent resin temporary plugging agent and preparation method thereof |
| CN106281268A (en) * | 2016-08-12 | 2017-01-04 | 中国海洋石油总公司 | A kind of organic diverting agent of high temperature resistance and preparation method |
| CN106947448A (en) * | 2017-03-20 | 2017-07-14 | 濮阳市易发化工有限公司 | A kind of high permeability zone profile control agent and preparation method thereof |
| CN109184615A (en) * | 2018-08-15 | 2019-01-11 | 中国石油天然气股份有限公司 | A kind of sandy conglomerate bodies Selective Water Plugging method and application |
| CN109184615B (en) * | 2018-08-15 | 2021-03-30 | 中国石油天然气股份有限公司 | Selective water plugging method for oil well of conglomerate oil reservoir and application |
| CN109825269A (en) * | 2019-03-12 | 2019-05-31 | 中国石油大学(华东) | Shear loading type GEL USED FOR PLUGGING WELL LOST CIRCULATION and the preparation method and application thereof |
| CN113105876A (en) * | 2020-01-13 | 2021-07-13 | 中国石油化工股份有限公司 | Drilling well plugging agent, preparation method and application thereof |
| CN111349248A (en) * | 2020-04-13 | 2020-06-30 | 西南石油大学 | Branched sulfamic acid nano plugging agent and water-based drilling fluid |
| CN113651915A (en) * | 2020-08-26 | 2021-11-16 | 中国石油大学(北京) | Gel polymer for bionic while-drilling pressure-bearing leaking stoppage drilling fluid |
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Application publication date: 20110615 |