CN1919963A - Brine cement slurry adapted for salt hole air reserved storeroom - Google Patents
Brine cement slurry adapted for salt hole air reserved storeroom Download PDFInfo
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- CN1919963A CN1919963A CN 200610089236 CN200610089236A CN1919963A CN 1919963 A CN1919963 A CN 1919963A CN 200610089236 CN200610089236 CN 200610089236 CN 200610089236 A CN200610089236 A CN 200610089236A CN 1919963 A CN1919963 A CN 1919963A
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Abstract
The invention relates the salt-water cement mud. The mud comprises 100 parts G grade cement, 44-50 parts 15-18% salt-water, 1.2-1.8 parts salt resistance dispersing agent, 3-4 parts salt resistance filtration-reducing agent, and 0.1-0.5 parts defoaming agent. The invention also provides the technology, which has low cost and simple operation and meets other mating technology. The cement has advantages of low temperature fast coagulation, good salt resistance, high-early-strength, preference consistency, low filteration loss and good stability.
Description
Technical field:
The inventive method relates to the oil and natural gas field of engineering technology, particularly the salt hole gas storage cementing slurry.
Background technology:
Salt hole gas storage is that " West-east Gas ensures gas transmission safety, and the needs that satisfy seasonal peak regulation are built in order to satisfy.In every engineer operation of salt hole gas storage, the life-span of cementing quality and gas storage, long-term safety operation are closely related.Particularly " some of West-east Gas construction gas storage are populous, and the network of rivers is gathered regional, reveal in case Sweet natural gas takes place, and consequence is hardly imaginable.We can say that the cementing quality quality is " project of vital and lasting importance " that is related to salt hole gas storage.
Salt hole gas storage is to the particular requirement of cementing quality, and some regional special geological condition have been brought a lot of difficulties to cementing operation.Mainly show as: well is shallow, and bottom temperature is low; Domesticly be applicable to that the admixture of hypothermic saline grout is few, prescription screening difficulty; Brine cement slurry density height, whipability is strong, and the site operation difficulty is big, and density is wayward; Upper formation low pressure easy to leak; Size of the hole is bigger, and the annular space gap that cementing concrete is filled is big; Hole anomaly, poor stability improves the displacement efficiency difficulty; The periodical change of gas storage well operating pressure, the cement stone after the gluing bears repeated stress, and is high to the long-term bonding capacity and the sealing property requirement of cement mantle.
Satisfy the mortar architecture of shallow-layer salt hole gas storage well cementation needs, require that low temperature coagulates soon, salt resistance is good, high early strong, microdilatancy, slurry stability is good, denseness is suitable and drilling fluid and spacer pad have excellent compatibility.The well cementation of shallow-layer salt deposit is one of the personnel's recognized techniques difficult problem of cementing the well both at home and abroad always.The salt deposit well cementation shallow like this at salt hole gas storage still belongs to the first time in China, or brand-new problem, there is not sophisticated experience to use for reference, the particularly domestic anti-salty mud system of low temperature that is not fit to the salt hole gas storage well cementation, lack relevant supporting technology and experience, so each technical work challenge of can saying so.
Though domesticly carried out the salt deposit cementing technology in Jianghan Oil-field, Zhongyuan Oil Field, Qinghai Oil Field and oil field, Tarim Basin, but the salt layer depth is about 3500～5000m, the general anti-salty mud system of high temperature that adopts, this mortar architecture is developed at the well cementation of deep layer salt deposit.Under salt hole gas storage shallow-layer low temperature salt deposit condition, these anti-salty muds do not solidify for a long time, can not be fit to the well cementation of shallow-layer salt deposit.
In sum, domesticly do not carry out salt hole gas storage cementing technology under the shallow-layer low temperature salt deposit condition, and do not have sophisticated experience to use for reference, and do not have the mortar architecture of dependable performance can satisfy the requirement of salt hole gas storage well cementation under the shallow-layer low temperature salt deposit condition yet.
Summary of the invention
The object of the present invention is to provide a kind of brine cement slurry system that is applicable to salt hole gas storage, can satisfy salt hole gas storage well cementation under the shallow-layer low temperature salt deposit condition.This grout belongs to low-temperature high-early strength half saturated brine mortar architecture, this grout cost is low, the scene is easy to construction, can guarantee the cementing quality and the secular bonding quality of shallow-layer low temperature salt deposit salt hole gas storage, is cavity pressure testing and the operation of the long-term safety after the gas storage of satisfying the later stage.For gas storage provides reliable guidance.Overcome the deficiency that the anti-salty mud of existing high temperature can not be applied to the well cementation of shallow-layer low temperature salt deposit salt hole gas storage.
The technical solution used in the present invention is: the present invention proposes a kind of brine cement slurry that is applicable to salt hole gas storage, and the formulation weight ratio is:
G class g cement: 100 parts;
Concentration is 15%～18% salt solution: 44～50 parts;
Anti-dipersant is a sulphonated acetone formaldehyde polycondensates: 1.2～1.8 parts;
Anti-salt water retaining is 2-acrylamide-2-methyl propane sulfonic acid/acrylamide/acrylic acid copolymer: 3～4 parts;
Silicone antifoam agent: 0.1～0.5 part.Silicone antifoam agent has sale in market, and the procurement staff can purchase; The material that those skilled in the art is known.
The preparation that is applicable to the brine cement slurry of salt hole gas storage is operated in the well cementation scene, is finished by the operator.
In order to be applicable to the brine cement slurry of salt hole gas storage, can give play to better effect, its construction technology comprises the following steps:
(1) carry out high flow rate washover before the well cementation, fully circulating fluid increases flowability, and well-flushing control is returned speed at 1.2～1.5m/s.
(2) centralizer RIH on request, below the lower well section 150m, every sleeve pipe adds a centralizer; 150～500m well section, per 2 sleeve pipes add a centralizer; Per 3 sleeve pipes of the above well section of 500m add a centralizer.
(3) adopt on-the-spot bittern 10～20m
3Be preflush, density is 1.19g/cm
3, the preflush consumption is controlled at about annular space height 300m.
(4) adopt three sections system grouts, injecting density earlier before the first cement injection is 1.50～1.60g/cm
3Low density neck slurry as spacer pad, consumption and washing fluid are basic identical;
(5) reinject in the middle of pulp density be 1.80～1.85g/cm
3
(6) injecting tail slurry density at last is 1.90～1.95g/cm
3
(7) cementing discharge capacity is controlled at 1.0～1.2m
3/ min, discharge capacity is controlled at 1.5m when beginning for slurry
3About/min, discharge capacity is controlled at 0.7～1.0m before the bruising
3/ min adopts the cementing truck bruising.
The operation of circulating fluid of the present invention, centralizer RIH, cement injection and bruising is that the normal operations workman utilizes on-the-spot rig and well cementation equipment, can skillfully finish the importantly strict index complete operation of pressing this programme.
Beneficial effect of the present invention: the invention provides that a kind of technology is reliable, execute-in-place is strong, cost is low, can satisfy the brine cement slurry system of salt hole gas storage well cementation under the shallow-layer low temperature salt deposit condition, this brine cement slurry system have low temperature coagulate soon, high early strong, denseness is suitable, fluid loss is low, the slurry permanent stability are good, not erosion salt deposit in the well cementation.Adopt three sections systems to inject grout, cement stone and first interface, second contact surface cement, and can guarantee effective packing of annular space, with the creep of opposing salt deposit.C.I.P., grout should be changed into solid-state fast by liquid state, and with the duration of contact on minimizing and salt deposit and stratum, cement stone should have secular strength stability, and cement stone and sleeve pipe and stratum have good bonding capacity.Ensured the cementing quality and the secular bonding quality of shallow-layer low temperature salt deposit salt hole gas storage, cement stone has secular strength stability and secular bonding capacity; Satisfy the cavity pressure testing and the operation of the long-term safety after the gas storage in later stage.Satisfy the requirement of salt hole gas storage shallow-layer salt deposit well cementation, filled up the blank of domestic salt hole gas storage well cementation.
The brine cement slurry that is applicable to salt hole gas storage in the Jintan geographic have in 16 mouthfuls of wells well cementation such as halogen mining well Xi1Jing, Xi2Jing, gold money 1 well successfully on probation.Detect through the CBL/VDL cementing quality, annular space first interface, second contact surface strong bonding, the glued high-quality of salt interval, pressure testing 25MPa in sleeve pipe, the proof cementing quality is good, and the on-the-spot brine cement slurry that is applicable to salt hole gas storage that shows on probation can satisfy the requirement of salt hole gas storage well cementation.
Below in conjunction with embodiment technical scheme of the present invention is further described.
Embodiment
Embodiment 1: embodiments of the invention are example with the brine cement slurry that is applicable to salt hole gas storage that the existing halogen mining well Xi2Jing in area, Jintan adopts, and describe:
1. the basic condition of Xi2Jing:
(1) the exploitation time: 8 years
(2) molten chamber volume: 16.00 * 104m
3
(3) salt deposit buried depth: 925.2～1065m
(4) salt layer thickness: 139.8m
(5) top, chamber salt layer thickness: 11.9m
(6) dark under the Φ 339.7mm sleeve pipe: 90.22m
(7) Φ 311.2mm redrill bit bores dark: 933.5m
(8) dark under the Φ 244.5mm sleeve pipe: 931.2m
2. be applicable to the brine cement slurry preparation of salt hole gas storage
G class g cement: 5000Kg adopts good magnificent board G class g cement.
Concentration is 18% salt solution: 242Kg, adopts on-the-spot bittern.
Anti-dipersant, sulphonated acetone formaldehyde polycondensates: 85Kg;
Anti-salt water retaining: 175Kg adopts 2-acrylamide-2-methyl propane sulfonic acid/acrylamide/acrylic acid copolymer.
Silicone antifoam agent: 15Kg.
Preparation work is finished at the well cementation scene by the workman.Water sample after preparing is detected, if it is inhomogeneous to be mixed, it is qualified to proceed to be stirred to detection.
3. cementing operation technological process
(1) carry out high flow rate washover before the well cementation, circulating fluid, well-flushing control is returned speed at 1.3m/s.
(2) centralizer RIH on request, below the lower well section 150m, every sleeve pipe adds a centralizer; 150～500m well section, per 2 sleeve pipes add a centralizer; Per 3 sleeve pipes of the above well section of 500m add a centralizer.
(3) adopt on-the-spot bittern 10m
3Be preflush, density is 1.19g/cm
3, the preflush consumption is controlled at about annular space height 300m, discharge capacity 1.0m
3/ min.
(4) injecting density earlier before the cement injection is 1.60g/cm
3Low density neck slurry as spacer pad, consumption 10.0m
3, discharge capacity 1.0m
3/ min.
(5) inject middle slurry 25.0m
3, density 1.85g/cm
3, discharge capacity 1.0m
3/ min;
(6) inject tail slurry 20.0m
3, density 1.94g/cm
3, discharge capacity 1.0m
3/ min.
Discharge capacity is controlled at 1.5m when (7) beginning to replace slurry
3About/min, discharge capacity is controlled at 0.8m before the bruising
3/ min.
(8) termination of pumping discharges plug, and cementing truck is for tamponade liquid 2.0m
3, discharge capacity 1.0m
3/ min;
(9) pump is for mud 28m
3, discharge capacity 1.5m during beginning
3/ min, mud return out stable back discharge capacity control 1.8m
3/ min, well head see that low-density cement mortar returns out the back and reduces pumping rate to 1.5m
3Below/the min, 6.2m before the bruising
3Use cementing truck instead for slurry, discharge capacity is controlled at 0.8～1.0m
3/ min;
(10) cementing truck bruising, slowly roof pressure is to 15MPa, voltage stabilizing 5 minutes;
(11) put pressure, check and reflux;
Survey CBL/VDL after (12) 72 hours, check cementing quality.
4. cementing quality detects and pressure testing
(1) carry out cementing quality with CBL/VDL behind the 72h and detect, grout returns well head, salt interval sound 0～3%, and the second contact surface strong bonding, full well cementing quality is good.
(2) pressure testing 25MPa in the sleeve pipe, the 30min pressure drop is 0; Casing shoe place pressure testing 25MPa, the 30min pressure drop is 0; Detect (pressure testing 14.2MPa) through the cavity stopping property, prove that cementing quality can satisfy the requirement of gas storage.
Claims (3)
1, a kind of brine cement slurry that is applicable to salt hole gas storage is characterized in that: the formulation weight ratio is:
G class g cement: 100 parts;
Concentration is 15%～18% salt solution: 44～50 parts;
Anti-dipersant is a sulphonated acetone formaldehyde polycondensates: 1.2～1.8 parts;
Anti-salt water retaining is 2-acrylamide-2-methyl propane sulfonic acid/acrylamide/acrylic acid copolymer: 3～4 parts;
Silicone antifoam agent: 0.1～0.5 part.
2, the brine cement slurry that is applicable to salt hole gas storage according to claim 1 is characterized in that: what the G class g cement adopted is good magnificent board G class g cement.
3, the brine cement slurry that is applicable to salt hole gas storage according to claim 1 and 2, it is characterized in that: its construction technology comprises the following steps:
(1) carry out high flow rate washover before the well cementation, fully circulating fluid increases flowability, and well-flushing control is returned speed at 1.2～1.5m/s;
(2) centralizer is lowered on request, and below the lower well section 150m, every sleeve pipe adds a centralizer, 150～500m well section, and per 2 sleeve pipes add a centralizer, and per 3 sleeve pipes of the above well section of 500m add a centralizer;
(3) adopt on-the-spot bittern 10～20m
3As preflush, preflush adopts saturated bittern, and density is 1.19g/cm
3, the preflush consumption is controlled at about annular space height 300m;
(4) adopt three sections system grouts, injecting density earlier before the first cement injection is 1.50～1.60g/cm
3Low density neck slurry as spacer pad, consumption and washing fluid are basic identical;
(5) reinject in the middle of pulp density be 1.80～1.85g/cm
3
(6) injecting tail slurry density at last is 1.90～1.95g/cm
3
(7) cementing discharge capacity is controlled at 1.0～1.2m
3/ min, discharge capacity is controlled at 1.5m when beginning for slurry
3About/min, discharge capacity is controlled at 0.7～1.0m before the bruising
3/ min adopts the cementing truck bruising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610089236 CN1919963A (en) | 2006-08-11 | 2006-08-11 | Brine cement slurry adapted for salt hole air reserved storeroom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610089236 CN1919963A (en) | 2006-08-11 | 2006-08-11 | Brine cement slurry adapted for salt hole air reserved storeroom |
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| Publication Number | Publication Date |
|---|---|
| CN1919963A true CN1919963A (en) | 2007-02-28 |
Family
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|---|---|---|---|
| CN 200610089236 Pending CN1919963A (en) | 2006-08-11 | 2006-08-11 | Brine cement slurry adapted for salt hole air reserved storeroom |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429425A (en) * | 2007-11-07 | 2009-05-13 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Process for preparing vinyl sulphonate polymer drilling fluid finishing agent |
| CN101397491B (en) * | 2008-10-27 | 2011-02-16 | 中国科学院长春应用化学研究所 | Multi-element co-polymerization oil well cement fluid loss additive and preparation method thereof |
| CN101318799B (en) * | 2008-07-01 | 2012-05-23 | 中国海洋石油总公司 | High-strength low-freedom water low-density oil well cement paste |
| CN102587979A (en) * | 2012-01-19 | 2012-07-18 | 湖北双环科技股份有限公司 | Method for treating salty mud generated in rock salt solution mining sodium sulfate type brine purification |
| CN102618226A (en) * | 2012-03-09 | 2012-08-01 | 中成新星油田工程技术服务股份有限公司 | Saturated saline solution mud fluid taking brine as base solution and preparation method of saturated saline solution mud fluid |
| CN103865501A (en) * | 2014-02-28 | 2014-06-18 | 中国石油集团渤海钻探工程有限公司 | Low-density cement paste for salt-cavern gas storage well cementation |
| CN113548838A (en) * | 2020-04-23 | 2021-10-26 | 中石化石油工程技术服务有限公司 | Fresh water salt-resistant tough cement slurry for gas storage |
| CN115160891A (en) * | 2022-08-02 | 2022-10-11 | 中盐金坛盐化有限责任公司 | Construction method of salt cavern inner wall flora breeding coating |
| CN115925341A (en) * | 2022-12-20 | 2023-04-07 | 中国石油天然气集团有限公司 | Tough self-healing cement slurry for well cementation of salt cavern gas storage and preparation method thereof |
| CN116696475A (en) * | 2023-08-07 | 2023-09-05 | 新疆斐德莱布能源科技有限公司 | Method for modifying cavity of gas storage |
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2006
- 2006-08-11 CN CN 200610089236 patent/CN1919963A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429425A (en) * | 2007-11-07 | 2009-05-13 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Process for preparing vinyl sulphonate polymer drilling fluid finishing agent |
| CN101318799B (en) * | 2008-07-01 | 2012-05-23 | 中国海洋石油总公司 | High-strength low-freedom water low-density oil well cement paste |
| CN101397491B (en) * | 2008-10-27 | 2011-02-16 | 中国科学院长春应用化学研究所 | Multi-element co-polymerization oil well cement fluid loss additive and preparation method thereof |
| CN102587979A (en) * | 2012-01-19 | 2012-07-18 | 湖北双环科技股份有限公司 | Method for treating salty mud generated in rock salt solution mining sodium sulfate type brine purification |
| CN102618226A (en) * | 2012-03-09 | 2012-08-01 | 中成新星油田工程技术服务股份有限公司 | Saturated saline solution mud fluid taking brine as base solution and preparation method of saturated saline solution mud fluid |
| CN102618226B (en) * | 2012-03-09 | 2013-08-21 | 中成新星油田工程技术服务股份有限公司 | Saturated saline solution mud fluid taking brine as base solution and preparation method of saturated saline solution mud fluid |
| CN103865501A (en) * | 2014-02-28 | 2014-06-18 | 中国石油集团渤海钻探工程有限公司 | Low-density cement paste for salt-cavern gas storage well cementation |
| CN113548838A (en) * | 2020-04-23 | 2021-10-26 | 中石化石油工程技术服务有限公司 | Fresh water salt-resistant tough cement slurry for gas storage |
| CN113548838B (en) * | 2020-04-23 | 2022-11-04 | 中石化石油工程技术服务有限公司 | Fresh water salt-resistant tough cement slurry for gas storage |
| CN115160891A (en) * | 2022-08-02 | 2022-10-11 | 中盐金坛盐化有限责任公司 | Construction method of salt cavern inner wall flora breeding coating |
| CN115925341A (en) * | 2022-12-20 | 2023-04-07 | 中国石油天然气集团有限公司 | Tough self-healing cement slurry for well cementation of salt cavern gas storage and preparation method thereof |
| CN115925341B (en) * | 2022-12-20 | 2024-03-08 | 中国石油天然气集团有限公司 | Flexible self-healing cement slurry for well cementation of salt cavern gas storage and preparation method thereof |
| CN116696475A (en) * | 2023-08-07 | 2023-09-05 | 新疆斐德莱布能源科技有限公司 | Method for modifying cavity of gas storage |
| CN116696475B (en) * | 2023-08-07 | 2023-11-07 | 新疆斐德莱布能源科技有限公司 | Method for modifying cavity of gas storage |
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