CN105331340A - High-temperature-resistant gel plugging agent - Google Patents
High-temperature-resistant gel plugging agent Download PDFInfo
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- CN105331340A CN105331340A CN201510794977.XA CN201510794977A CN105331340A CN 105331340 A CN105331340 A CN 105331340A CN 201510794977 A CN201510794977 A CN 201510794977A CN 105331340 A CN105331340 A CN 105331340A
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- temperature
- plugging agent
- acid ester
- titanic acid
- polyacrylamide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/04—Hulls, shells or bark containing well drilling or treatment fluids
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sealing Material Composition (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention relates to a high-temperature-resistant gel plugging agent. The high-temperature-resistant gel plugging agent is characterized by being prepared from sesbania gum, titanate, carboxymethylcellulose, polyacrylamide, solid-phase particles and distilled water in parts by weight. The high-temperature-resistant gel plugging agent can resist the high temperature of 120 DEG C and has the good salt resistance. The plugging agent is not limited by the size and the shape of a leakage path and can enter the leakage path through compressional deformation, the utilization rate of the plugging agent is increased, and the waterproof performance is good. Besides, common gel plugging agents are limited for high-temperature stratums and stratums with the higher mineralization degree, and the temperature resistance and the salt resistance of the newly developed gel plugging agent are tried to be improved.
Description
Technical field
The present invention relates to a kind of GEL USED FOR PLUGGING WELL LOST CIRCULATION, particularly relate to a kind of high-temperature-resgelant gelant plugging agent.
Background technology
Leakage refers in oil, natural gas exploration and development process, and a kind of down hole problem that leakage enters stratum occurs for drilling fluid, workover fluid, cementing slurry etc., and leakage can affect the drilling operation cycle, if compromise reservoir also can affect oil gas well yield.Current plugging agent of a great variety, most plugging agent exist the efficiency pumping into stratum low, can by problems such as dilution wash away when being applied to the higher stratum of water content.In addition, common GEL USED FOR PLUGGING WELL LOST CIRCULATION has limitation for high-temperature stratum and the higher stratum of salinity.
Summary of the invention
For the problems referred to above, the invention provides a kind of high-temperature-resgelant gelant plugging agent, this plugging agent has good temperature tolerance, salt tolerance, and water repelling property is good.
The technical solution adopted for the present invention to solve the technical problems is:
Plugging agent is prepared from by ratio of weight and the number of copies by sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, solid phase particles and distilled water, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: solid phase particles: distilled water=0.3-0.8:0.1-0.4:0.2-0.6:0.2-0.6:3-8:90-96.
Described sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, solid phase particles and distilled water preferred weight portion rate be, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: solid phase particles: distilled water=0.5:0.25:0.4:0.4:5:93.45.
Described solid phase particles is Pericarppium arachidis hypogaeae or nut-shell or its combination.
GEL USED FOR PLUGGING WELL LOST CIRCULATION provided by the invention has the following advantages:
1, this this gel leak stopping has good salt tolerance to 20 ~ 40 order casting beds.The shut-off capacity of gel strengthens along with diminishing of hole.When 25 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, plugging effect is good.
2, this GEL USED FOR PLUGGING WELL LOST CIRCULATION can resist 120 DEG C of high temperature, salt tolerance good.Select sesbania gum as host polymer, titanic acid ester, as linking agent, makes a kind of new type gel plugging agent, has resistance to elevated temperatures.
3, do not limit by leakage channel size and shape, enter wherein by crimp, improve the utilization ratio of plugging agent, and water repelling property is good.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, invention is further illustrated.
Fig. 1 is the plugging effect schematic diagram of 20 ~ 40 order casting bed gels under differing temps.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
The present invention determines that formula is 0.5wt% sesbania gum, 0.25wt% titanic acid ester, 0.4wt% carboxymethyl cellulose, 0.4wt% polyacrylamide, 5wt% solid phase particles Pericarppium arachidis hypogaeae, 93.45% distilled water.The practicality that performance evaluation both can detect plugging agent is carried out to high-temperature stratum, also can guarantee that this plugging agent meets site operation requirement, simultaneously for the configuration of site operation plugging agent provides reference.
1, plugging agent coagulates gelling system selection
Polymer molecular chain is connected with high volence metal ion by chemical bond, form a kind of space net structure that can be used to wrap up free water, as Fig. 1, i.e. gelinite, the visco-elasticity of this space net structure is higher, generally, the quantity that between macromolecular chain, chemical bond is crosslinked determines cancellated size.
(1) fluid loss agent proportioning is determined
Respectively to the gelling system of 0.5% sesbania gum+0.25% titanic acid ester and the fluid loss agent of the different amount of interpolation, under 25 DEG C (normal temperature), test its gelation time and viscosity, test result is as table 1.
The consumption fixing sesbania gum is as shown in Table 1 0.5%, the consumption of titanic acid ester is 0.25%, along with CMC addition is increased to 0.5% from 0.1% gradient, the gelation time of gel reduces to 50min from 1h20min, viscosity is increased to 72000mPas by 67000mPas, this is because titanic acid ester and water generation hydrolysis reaction, cracking goes out Virahol and generates a kind of activity hydroxy inner complex, and this inner complex can form colloid with fibrin reaction.When CMC dosage is 0.5%, gelation time is too fast, for ensureing that gelation time is at 1 ~ 4h, determines that the addition of CMC is 0.4%.
2, high-temperature stabiliser proportioning
After adding linking agent titanic acid ester, gelatin polymer starts and titanic acid ester generation crosslinking reaction, along with the increase of time, the viscosity of gel starts to become large gradually, finally forms reticulated structure, during beginning, gel is first gel, and netted structural strength is lower, and hanging property is more weak.Along with the increase of time, free water is completely wrapped in reticulated structure, and the reticulated structure of gel is strengthened thereupon, and visco-elasticity also strengthens, and now can hang completely.
Respectively to the gelling system of 0.5% sesbania gum+0.25% titanic acid ester+0.4%CMC and the high-temperature stabiliser A of the different amount of interpolation, this gelling system is put into digestion tank, again digestion tank is put into portable roller process furnace, at 120 DEG C, heat rolls 16h, records heat and rolls the viscosity of rear gel as table 2.
Heat rolls the viscosity of front gel is as shown in Table 2 69000mPas, after when not adding A, at 120 DEG C, heat rolls 16h, the viscosity of gel is 22000mPas, along with A dosage is increased to 0.4% from 0.1% gradient, the viscosity that heat rolls rear gel is increased to 43000mPas from 35000mPas, known high-temperature stabiliser A heat-resisting property is good, simultaneously, after we can find out interpolation A, the gradient that viscosity increases is respectively 2000mPas, 3000mPas, 3000mPas, this is because along with the increase of A dosage, the temperature resistant capability of gel is improved, along with A dosage is increased to 0.5% from 0.4% gradient, the viscosity that heat rolls rear gel does not change.Determine that the dosage of A is 0.4%, finally determine that the formula of gelling system is: 0.5% sesbania gum+0.25% titanic acid ester+0.4%CMC+0.4%A.
3, pH value is on the impact of gel plastic
PH value is the principal element affecting gel gelation time and viscosity, and in base fluid, add hydrochloric acid (HCl), the sodium hydroxide (NaOH) of different amount, pH value being adjusted to respectively is 5,6,7,8.When 25 DEG C (normal temperature), test formulations is gelling system gelation time at various ph values and the viscosity of 0.5% sesbania gum+0.25% titanic acid ester+0.4%CMC+0.4%A respectively, as table 3.
4, plugging agent high temperature resistant property is evaluated
The gelling system prepared is placed in electric-heated thermostatic water bath, adjusts the temperature to 40 DEG C, 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 140 DEG C respectively, when temperature-stable, test this GEL USED FOR PLUGGING WELL LOST CIRCULATION gelation time at different temperatures.The gelation time of GEL USED FOR PLUGGING WELL LOST CIRCULATION at 40 DEG C, 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 140 DEG C is as table 4.
5,120 DEG C time 20 ~ 40 order casting bed plugging effect evaluations
This GEL USED FOR PLUGGING WELL LOST CIRCULATION of preparation 300mL, select 20 ~ 40 object casting beds, measure under 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa respectively 25 DEG C (normal temperature), 80 DEG C, 100 DEG C, 120 DEG C, 150 DEG C time wastage, experimental result is as shown in following table 5-9.
From table 5-9, when 25 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, plugging effect is good, and when 150 DEG C under 0.2MPa, 0.3MPa, 0.4MPa, wastage is 280mL, and wastage is bigger than normal, and summation is considered, this gel temperature resistance ability reaches 120 DEG C.
Embodiment 2
Plugging agent is prepared from by ratio of weight and the number of copies by sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, Pericarppium arachidis hypogaeae and distilled water, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: Pericarppium arachidis hypogaeae: distilled water=0.3:0.1:0.2:0.2:3:90.
Embodiment 3
Plugging agent is prepared from by ratio of weight and the number of copies by sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, nut-shell and distilled water, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: nut-shell: distilled water=0.8:0.4:0.6:0.6:8:96.
Embodiment 4
Plugging agent is prepared from by ratio of weight and the number of copies by sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, Pericarppium arachidis hypogaeae, nut-shell and distilled water, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: Pericarppium arachidis hypogaeae: nut-shell: distilled water=0.3:0.4:0.6:0.2:1:2:90.
Table 1 sesbania gum and the polymkeric substance of titanic acid ester and the CMC of different dosage are in the gelation time of 25 DEG C and viscosity
After table 2120 DEG C heat rolls 16h, the viscosity of gel and heat contrast before rolling
This gelling system of table 3 is time of plastic and viscosity at various ph values
Table 4 gelling system is at the gelation time of 40 DEG C, 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 140 DEG C
The wastage of gelling system under 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure during table 525 DEG C
The wastage of gelling system under 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure during table 680 DEG C
The wastage of gelling system under 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure during table 7100 DEG C
The wastage of gelling system under 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure during table 8120 DEG C
The wastage of gelling system under 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure during table 9150 DEG C
Claims (3)
1. a high-temperature-resgelant gelant plugging agent, it is characterized in that being prepared from by ratio of weight and the number of copies by sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, solid phase particles and distilled water, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: solid phase particles: distilled water=0.3-0.8:0.1-0.4:0.2-0.6:0.2-0.6:3-8:90-96.
2. a kind of high-temperature-resgelant gelant plugging agent according to claim 1, it is characterized in that described sesbania gum, titanic acid ester, carboxymethyl cellulose, polyacrylamide, solid phase particles and distilled water preferred weight portion rate are, sesbania gum: titanic acid ester: carboxymethyl cellulose: polyacrylamide: solid phase particles: distilled water=0.5:0.25:0.4:0.4:5:93.45.
3. a kind of high-temperature-resgelant gelant plugging agent according to claim 1 and 2, is characterized in that described solid phase particles is Pericarppium arachidis hypogaeae or nut-shell or its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510794977.XA CN105331340B (en) | 2015-11-18 | 2015-11-18 | A kind of high-temperature-resgelant gelant sealing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510794977.XA CN105331340B (en) | 2015-11-18 | 2015-11-18 | A kind of high-temperature-resgelant gelant sealing agent |
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| CN105331340A true CN105331340A (en) | 2016-02-17 |
| CN105331340B CN105331340B (en) | 2018-05-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336861A (en) * | 2016-08-30 | 2017-01-18 | 董晓 | Preparation method of novel plugging agent |
| CN110079286A (en) * | 2019-05-29 | 2019-08-02 | 北京探矿工程研究所 | Delayed crosslinking gel composition for plugging and preparation method thereof |
| CN110724508A (en) * | 2018-07-16 | 2020-01-24 | 长江大学 | Fiber composite gel particle bridging agent for fractured reservoir and preparation method thereof |
| CN110938413A (en) * | 2019-09-26 | 2020-03-31 | 霍尔果斯弗莱瑟逆向石油科技有限公司 | Reverse plugging material for stratum |
| CN112080261A (en) * | 2019-06-14 | 2020-12-15 | 中国石油化工股份有限公司 | Temporary plugging liquid and application thereof |
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| CN102746837A (en) * | 2012-01-13 | 2012-10-24 | 宫立武 | Microsphere temporary plugging agent for leakage oil well |
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2015
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336861A (en) * | 2016-08-30 | 2017-01-18 | 董晓 | Preparation method of novel plugging agent |
| CN110724508A (en) * | 2018-07-16 | 2020-01-24 | 长江大学 | Fiber composite gel particle bridging agent for fractured reservoir and preparation method thereof |
| CN110079286A (en) * | 2019-05-29 | 2019-08-02 | 北京探矿工程研究所 | Delayed crosslinking gel composition for plugging and preparation method thereof |
| CN110079286B (en) * | 2019-05-29 | 2021-07-06 | 北京探矿工程研究所 | Delayed crosslinking gel composition for plugging and preparation method thereof |
| CN112080261A (en) * | 2019-06-14 | 2020-12-15 | 中国石油化工股份有限公司 | Temporary plugging liquid and application thereof |
| CN110938413A (en) * | 2019-09-26 | 2020-03-31 | 霍尔果斯弗莱瑟逆向石油科技有限公司 | Reverse plugging material for stratum |
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| CN105331340B (en) | 2018-05-25 |
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Effective date of registration: 20200904 Address after: 163711 No.08, Xiangyang Industrial Park, west side of East trunk line, Longfeng District, Daqing City, Heilongjiang Province Patentee after: DAQING BEIHUA CHEMICAL PLANT Address before: Wanghua District West Dandong Road 113001 Liaoning city of Fushun province No. 1 Patentee before: Liaoning Shihua University |