CN102093859A - Drilling leak plugging agent applied to exploration and development of petroleum and natural gas - Google Patents
Drilling leak plugging agent applied to exploration and development of petroleum and natural gas Download PDFInfo
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- CN102093859A CN102093859A CN2009102167361A CN200910216736A CN102093859A CN 102093859 A CN102093859 A CN 102093859A CN 2009102167361 A CN2009102167361 A CN 2009102167361A CN 200910216736 A CN200910216736 A CN 200910216736A CN 102093859 A CN102093859 A CN 102093859A
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Abstract
The invention discloses a drilling leak plugging agent applied to the exploration and development of petroleum and natural gas. The leak plugging agent comprises the following components in percentage by weight: 78.0 percent of water, 0.5 percent of initiator, 1.5 percent of cross-linking agent, and 20.0 percent of 2-methyl-2-acrylamidopropanesulfonic acid and acrylamide in a mass ratio of 1:4-1:6. The reaction time is short; the water absorbency, the expansion rate and the plugging rate of the leak plugging agent are high; the leak plugging effect in the exploration and development process of the petroleum and the natural gas is obviously improved; and safety performance in the exploration and development process is enhanced.
Description
Technical field
The present invention relates to a kind of plugging agent, specifically be meant a kind of drill-feeding plugging agent that is used for oil-gas exploration and development.
Background technology
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.
Since the nineties, people pay attention to the research to the leakage prevention more, have established and have relied mainly on prevention, block up anti-bonded technological line.Reversed the passive situation of oil-gas field leak-proof leak-stopping work, each oilfield technology personnel has carried out deep research to weak zone feature, classification, leakage influence factor, formation pore pressure, parting pressure, leakage pressure etc.; Layer position, leakage condition and the leakage character that to miss this area have been predicted on this basis; By hole structure reasonable in design, drilling fluid density, type, prescription, performance and drilling engineering technical measures, effectively prevented the generation of leakage.As: aspect drilling technology: adopt the aerated foam drilling technique, can reach drilling well of conventional drilling liquid and the conventional leakage stopping technology technique effect that is beyond one's reach, reduced and handled the comprehensive cost that complicated leakage is lost.In recent years, paid attention to standardization, the commercialization of patching materials again, single bridge joint patching materials has changed into compound leak-stopping material, has improved leak stopping efficient.As: the situation of serious leakage takes place in Zhongyuan Oil Field often at down-hole large fracture, cavernous formation and coarse porosity permeability formation, worked out NEW TYPE OF COMPOSITE high-strength inorganic GEL USED FOR PLUGGING WELL LOST CIRCULATION SDR-2, mouthful well surplus the on-the-spot use 20, sealing ratiod reaches 100%, and one-time success rate reaches more than 80% in the shutoff operation.In the leak stopping process, more paid attention to reservoir protection, developed a series of plugging agents such as the high dehydration temporary plugging agent of solubility in acid, uniaxial pressure encapsulant, acid dissoluble cement with reservoir protection effect.
In the leak stopping process, paid attention to theoretical investigation, to the research of plugging test equipment, leak stoppage tool to leakage.A kind of novel lost circulation simulator has been studied by HuaBei Petroleum Administrative Bureau, this device feeds high pressure gas, make plugging drilling fluid under the impressed pressure effect, tentative module by the simulation drop ply produces leakage, then according to selected test temperature, the proportioning of evaluation study plugging agent components such as the leakage time of pressure and module feature and record, wastage, plugging effect and definite proper construction technology condition of plugging drilling fluid are for research and production provide science, reliable foundation.
Summary of the invention
Purpose of the present invention is in order to overcome the deficiencies in the prior art and defective, a kind of drill-feeding plugging agent that is used for oil-gas exploration and development is provided, this drill-feeding plugging agent reaction times is short, water absorbent rate, rate of expansion and sealing ratiod height, bearing capacity is big, significantly improve the plugging effect in oil, the natural gas exploration and development process, strengthened exploratory development process safe performance.
Purpose of the present invention is achieved through the following technical solutions: a kind of drill-feeding plugging agent that is used for oil-gas exploration and development, comprise 2-acrylamido-2-methyl propane sulfonic acid sodium, acrylamide, initiator and linking agent, by weight percentage, water accounts for 78.0%, initiator and account for 0.5%, linking agent accounts for 1.5%, and 2-methyl-2-acrylamido propanesulfonic acid and acrylamide account for 20.0%, and the mass ratio of 2-methyl-2-acrylamido propanesulfonic acid and acrylamide is 1: 4～1: 6.
Described initiator is Na
2SO
3
Described linking agent is a N,N methylene bis acrylamide.
As a preferred embodiment of the present invention, the mass ratio of described 2-methyl-2-acrylamido propanesulfonic acid and acrylamide is 1: 5.
In sum, the invention has the beneficial effects as follows: the reaction times is short, water absorbent rate, rate of expansion and sealing ratiod height, and bearing capacity is big, has significantly improved the plugging effect in oil, the natural gas exploration and development process, has strengthened exploratory development process safe performance.
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 is used for oil-gas exploration and development, comprise 2-acrylamido-2-methyl propane sulfonic acid sodium, acrylamide, initiator and linking agent, by weight percentage, water accounts for 78.0%, initiator and account for 0.5%, linking agent accounts for 1.5%, and 2-methyl-2-acrylamido propanesulfonic acid and acrylamide account for 20.0%, and the mass ratio of 2-methyl-2-acrylamido propanesulfonic acid and acrylamide is 1: 4～1: 6; Described initiator is Na
2SO
3, linking agent is a N,N methylene bis acrylamide.
Above-mentioned 2-methyl-2-acrylamido propanesulfonic acid and acrylamide account for the mass percent of total amount and fix, but its mass ratio each other is very big to the performance impact of plugging agent, in order to obtain the best 2-methyl-2-acrylamido propanesulfonic acid and the mass ratio of acrylamide, the present invention tests, the multiple different 2-methyl-2-acrylamido propanesulfonic acid and the situation of acrylamide mass ratio have been chosen in this experiment respectively, and the performance of plugging agent is as shown in the table:
| Mass ratio | 1∶2 | 1∶3 | 1∶4 | 1∶5 | 1∶6 | 1∶7 | 1∶8 |
| Reaction times (min) | 120 | 100 | 85 | 70 | 45 | 40 | 35 |
| Rate of expansion | 85 | 86 | 85 | 90 | 89 | 71 | 69 |
As can be seen from the above table, along with reducing of 2-methyl-2-acrylamido propanesulfonic acid and acrylamide mass ratio, the time decreased that reaction is consumed.But when initiator and linking agent mass ratio are reduced to 1: 6 when following, the polymerization degree of reaction product is less than normal, and molecular weight is too small, and expansion rate of water absorption is less, in addition the time of entire reaction too short, the polymkeric substance transformation efficiency is lower; Therefore, initiator and linking agent mass ratio should be greater than 1: 6.And the rate of expansion of plugging agent afterwards reduces along with 2-methyl-2-acrylamido propanesulfonic acid and acrylamide quality increase earlier than reducing of mass ratio, and this is when reducing because of mass ratio, and polyreaction is insufficient, and residual monomer is more; Along with the increase of mass ratio, the system free radical increases, and monomer can fully participate in polymerization, and polymerisate increases, and the product water absorbent rate increases; If continue to increase initiator amount, though speed of response is very fast, relative molecular mass descends obviously, and soluble part increases, thereby water absorbent rate is descended.Experiment shows, when initiator and linking agent mass ratio were 1: 4～1: 6, the performance of plugging agent was preferable, when initiator and linking agent mass ratio are 1: 5, and plugging agent performance the best, this is a preferred plan.
As mentioned above, just can realize the present invention preferably.
Claims (4)
1. drill-feeding plugging agent that is used for oil-gas exploration and development, it is characterized in that, comprise 2-acrylamido-2-methyl propane sulfonic acid sodium, acrylamide, initiator and linking agent, by weight percentage, water accounts for 78.0%, initiator and account for 0.5%, and linking agent accounts for 1.5%, 2-methyl-2-acrylamido propanesulfonic acid and acrylamide account for 20.0%, and the mass ratio of 2-methyl-2-acrylamido propanesulfonic acid and acrylamide is 1: 4～1: 6.
2. a kind of drill-feeding plugging agent that is used for oil-gas exploration and development according to claim 1 is characterized in that, the mass ratio of described 2-methyl-2-acrylamido propanesulfonic acid and acrylamide is 1: 5.
3. a kind of drill-feeding plugging agent that is used for oil-gas exploration and development according to claim 1 and 2 is characterized in that described initiator is Na
2SO
3
4. a kind of drill-feeding plugging agent that is used for oil-gas exploration and development according to claim 1 and 2 is characterized in that described linking agent is a N,N methylene bis acrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102167361A CN102093859A (en) | 2009-12-14 | 2009-12-14 | Drilling leak plugging agent applied to exploration and development of petroleum and natural gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102167361A CN102093859A (en) | 2009-12-14 | 2009-12-14 | Drilling leak plugging agent applied to exploration and development of petroleum and natural gas |
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| CN102093859A true CN102093859A (en) | 2011-06-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102766446A (en) * | 2012-07-25 | 2012-11-07 | 中国石油大学(北京) | High-temperature-resistant high-density formate polysulfonate drilling fluid and preparation method thereof |
| CN104388066A (en) * | 2014-10-31 | 2015-03-04 | 中国石油化工集团公司 | Preparation method of plugging agent for drilling fluid |
| 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 |
| CN115163003A (en) * | 2018-07-04 | 2022-10-11 | 埃沃尔技术股份有限公司 | Method of forming a high efficiency geothermal wellbore |
-
2009
- 2009-12-14 CN CN2009102167361A patent/CN102093859A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102766446A (en) * | 2012-07-25 | 2012-11-07 | 中国石油大学(北京) | High-temperature-resistant high-density formate polysulfonate drilling fluid and preparation method thereof |
| CN104388066A (en) * | 2014-10-31 | 2015-03-04 | 中国石油化工集团公司 | Preparation method of plugging agent for drilling fluid |
| 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 |
| CN115163003A (en) * | 2018-07-04 | 2022-10-11 | 埃沃尔技术股份有限公司 | Method of forming a high efficiency geothermal wellbore |
| US11959356B2 (en) | 2018-07-04 | 2024-04-16 | Eavor Technologies Inc. | Method for forming high efficiency geothermal wellbores |
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Application publication date: 20110615 |