CN104046340A - High-temperature-resistant salt-resistant strong inhibitive drilling fluid system - Google Patents
High-temperature-resistant salt-resistant strong inhibitive drilling fluid system Download PDFInfo
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- CN104046340A CN104046340A CN201410197699.5A CN201410197699A CN104046340A CN 104046340 A CN104046340 A CN 104046340A CN 201410197699 A CN201410197699 A CN 201410197699A CN 104046340 A CN104046340 A CN 104046340A
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- Prior art keywords
- drilling fluid
- fluid system
- agent
- resisting
- salt
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Classifications
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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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
Abstract
The invention relates to a high-temperature-resistant salt-resistant strong inhibitive drilling fluid system comprising the following materials by mass on the basis of the mass of added water of 100%: 2-7% of bentonite slurry, 0.1-0.3% of an alkaline regulator, 0.3%-2% of a shale inhibitor, 0.5-4% of a high-temperature-resistant filtrate reducer A, 0.5-4% of a heat and salt-resistant filtrate reducer B, and 1%-7% of a plugging anti sloughing agent. The invention also provides chemical structural general formula (1) of the high-temperature-resistant filtrate reducer A, and a, b, c and d are the structure unit number. The drilling fluid system has the following characteristics: the drilling fluid system can resist the high temperature reaching to 230 DEG C, before and after-aging API filter loss is less than 10mL, the drilling fluid system can resist sodium chloride until saturation, and is strong in inhibition; compared with tap water, the third time rock debris recovery improvement rate amounts to 100.54% above; and the drilling fluid system is strong in inferior soil resistance and calcium pollution resistance.
Description
Technical field
The present invention relates to a kind of drilling fluid system, particularly relate to the strong inhibited drilling fluid system of a kind of high-temperature resisting and salt-resisting for deep-well, ultra deep well.
Background technology
Along with the fast development of petroleum industry and the increase of world energy sources demand, petroleum exploration and development emphasis worldwide by Yi Xiangnan, by land to ocean, shifted to deep formation by shallow-layer.The probing of deep & ultra-deep well has become the important topic that China and even whole world petroleum industry are faced.In drilling process, due to the existence of underground temperature gradient and formation pressure gradient, well is darker, and in pit shaft, temperature and pressure will be higher, the various bad grounds such as the salt deposit running into, brine layer, saline bed will get more and more, and drilling fluid is easy to lose its original performance under high temperature and high salt.How tackling high temperature and high salt, is the matter of utmost importance facing in deep & ultra-deep well drilling process.
In the probing of deep & ultra-deep well, the quality of drilling fluid is directly connected to the success or failure of drilling well.In order to meet the needs of the various complex stratigraphic drillings such as deep & ultra-deep well high temperature and high salt, each oil universities and colleges and research institution have researched and developed various high-temperature resisting and salt-resisting drilling fluid systems in succession, as three sulphur drilling fluids, sulfonate polymer saturated salt-water drilling fluid, amphoteric ion polymer salt resistant drilling etc., these high-temperature resisting and salt-resisting drilling fluids, mostly belong to and disperse that mud, the outstanding problem of existence are that temperature tolerance poor (heatproof reaches 180 ℃), inhibition are poor, rheological and leak-off be difficult to the problems such as the coordinating and unifying.The advantages such as the heat-resistant salt-resistant ability that has oil base drilling fluid suppresses by force and by force, lubricity is good, but there is contaminate environment and high in cost of production shortcoming in him simultaneously, and security risk is large.
Summary of the invention
Main purpose of the present invention is: develop a kind of high temperature resistance, anti-salt to saturated, strong inhibited drilling fluid system, meet current deep-well, ultra deep well drilling well requirement.
Specifically, the present invention is achieved through the following technical solutions:
The strong inhibited drilling fluid system of high-temperature resisting and salt-resisting involved in the present invention, is 100% by the quality that adds water, by percentage to the quality, contains following material:
Bentonite slurry 2-7%;
Alkaline conditioner 0.1-0.3%;
Shale control agent 0.3%-2%;
Heat resisting fluid loss reducing agent A 0.5-4%;
Heat and salinity tolerance fluid loss agent B 0.5-4%;
Shutoff anti-sloughing agent 1%-7%.
Wherein, wilkinite is to take montmorillonite as main moisture clay pit, and its chemical general formula is: (Al
2mg
3) (Si
4o
10) (OH)
2nH
2o, has the 2:1 type crystal structure being comprised of two silicon-oxy tetrahedron folder one deck alumina octahedrals.The present invention can use commercially available conventional sodium bentonite, for example: the sodium bentonite of the sodium bentonite of the sodium bentonite of Shengli Oil Field blogger Mud Technology company limited supply, the supply of Weifang China wilkinite company limited, the sodium bentonite of Surabaja Hong Yu bentonite in powder factory supply, the supply of Qingdao Yu Zhou Chemical Co., Ltd..In the present invention, preferably use the sodium bentonite of Shengli Oil Field blogger Mud Technology company limited supply.
Wherein, described alkaline conditioner is one or both in sodium hydroxide or sodium carbonate.
Wherein, described shale control agent is amido polyalcohols, and one or more monomer polymerizations or condensation in oxyethane, propylene oxide, organic amine form.
As led to the compound of formula I:
Wherein, R is H or CH
3; N is the integer between 5-20, repeateding unit number.
The amido polyalcohols AP-1 that preferably uses Shandong get Shun Yuan Petroleum Technology Co., Ltd to produce in the present invention.
Wherein, described heat resisting fluid loss reducing agent A is nitrile silicon polymer, by 2-ammonium acrylate-2-methyl propane sulfonic acid (AMPS), ammonium acrylate (AM), vinyl cyanide (AN), vinylformic acid (AA) and silane coupling agent, is polymerized.Nitrile silicon polymer is a kind of novel heat resisting fluid loss reducing agent, and owing to introducing the high temperature resistance groups such as sulfonic group, itrile group, alkyl silicon ether in molecular chain, temperature resistance is effective, and anti-salt, to saturated, can be applied in deep & ultra-deep well.
As led to the compound of formula II:
Wherein, a, b, c, d are the integer between 50-1000, repeateding unit number.
The nitrile silicon polymer SO-1 that preferably uses Shandong get Shun Yuan Petroleum Technology Co., Ltd to produce in the present invention.
Wherein, described heat and salinity tolerance fluid loss agent B is alkene monomer polymer.
The heat and salinity tolerance fluid loss agent LY-1 that preferably uses Shandong get Shun Yuan Petroleum Technology Co., Ltd to produce in the present invention.
Wherein, described shutoff anti-sloughing agent is sulfonated gilsonite.
The sulfonated gilsonite FT-1 that preferably uses Shandong get Shun Yuan Petroleum Technology Co., Ltd to produce in the present invention.
Deep-well described in the present invention is the drilling well of well depth 4500-6000m, and ultra deep well is drilling well more than well depth 6000m.
Anti-salt described in the present invention, mainly refers to sodium-chlor, comprises edible sodium chloride salt, industrial sodium chloride salt etc., and what meet standard GB/T/T5462-2003 is all applicable to the present invention.
Anti-salt described in the present invention, to saturated, mainly refers to the pollution of anti-sodium-chlor to drilling fluid, and wherein the concentration of sodium-chlor, by zero to saturated (20 ℃, 100g water, 36g sodium-chlor), all can be applied drilling fluid composition of the present invention and reach desirable result of use.
Beneficial effect of the present invention is:
The present invention, by the application of shale control agent, improves the inhibition of drilling fluid system, effectively controls clay dispersion, prevents bit balling, Stable Manifold; By the application of heat resisting fluid loss reducing agent SO-1, improve the high-temperature aging resisting ability of drilling fluid system, reduce the API filtration after high temperature ageing; By the application of sulfonated gilsonite, improve the shutoff anti sloughing effectiveness of drilling fluid system, further reduce high temperature and high pre ssure filtration, play the effect of stabilizing borehole.High temperature resistance reaches 230 ℃, and aging front and back API filtration is all less than 10mL; Anti-sodium-chlor is to saturated; Strong inhibition capability, compares three landwaste recovery increase rates and reaches more than 100.54% with tap water; Anti-poor quality is native, calcium fouling resistance ability is strong.
Embodiment
Below in conjunction with embodiment and embodiment, the invention will be further described, but illustrated embodiment is not as the restriction to this patent.
Embodiment 1
Amount according to each component of embodiment in table 11 takes, and under high-speed stirring, (11000r/min) prepares drilling fluid according to mode of the present invention.
Embodiment 2
Amount according to each component of embodiment in table 12 takes, and under high-speed stirring, (11000r/min) prepares drilling fluid according to mode of the present invention.
Embodiment 3
Amount according to each component of embodiment in table 13 takes, and under high-speed stirring, (11000r/min) prepares drilling fluid according to mode of the present invention.
Embodiment 4
Amount according to each component of embodiment in table 14 takes, and under high-speed stirring, (11000r/min) prepares drilling fluid according to mode of the present invention.
The drilling fluid composition of table 1 embodiment 1-4 forms.
The mensuration of embodiment 5 rheologicals, API filtration, high temperature and high pre ssure filtration
To the drilling fluid system of embodiment 1-4 in strict accordance with < < GB/T 16783.1-2006 industrial gas oil drilling fluid on-the-spot test part 1: rheological and the API filtration of the 200 ℃ of aging front and back of method evaluation in water-base drilling fluid > >, and the high temperature and high pre ssure filtration under 150 ℃, 3.5MPa.The parameter of wherein measuring has AV(apparent viscosity), PV(plastic viscosity), YP(yield value), FL
aPI(API filtration), FL
hTHP(high temperature and high pre ssure filtration), measurement result is in Table 2
Rheological, the filter loss measurement result of table 2 embodiment 1-4 drilling fluid system
From above-described embodiment, can find out, the rheological of the drilling fluid system described in embodiment 1-4 is good, and API filtration and high temperature and high pre ssure filtration are low, have good high-temperature resistance and saline-alkaline tolerance.
Embodiment 6 inhibition experiments (landwaste recovery experiment)
Select Shengli Oil Field to seek 722 flat 2 well mud stone rock samples, through washing, air-dry, to pulverize, cross aperture be 2.00-3.20 mm sieve, according to the roll experiment evaluation method in < < SY/T 6335-1997 shale-control agent for drilling fluid evaluation method > >, drilling fluid system described in embodiment 1-4 is carried out to landwaste recovery experiment three times, and experimental data is in Table 3:
Table 3 embodiment 1-4 drilling fluid system landwaste recovery experiment result
From above-described embodiment, can find out, the drilling fluid system described in embodiment 1-4 has three times higher landwaste and reclaims increase rates, illustrates that it has stronger inhibition, can effectively control clay dispersion, is conducive to wellbore stability.
Embodiment 7 high temperature resistance experiments
In the drilling fluid of selecting embodiment 4 to prepare, the most responsive saturated salt system of high temperature is carried out to high temperature resistance experiment, according to < < GB/T 16783.1-2006 industrial gas oil drilling fluid on-the-spot test part 1: rheological and API filtration before and after 200 ℃, the 230 ℃ aging 16h of method evaluation in water-base drilling fluid > >, wherein location parameter has AV(apparent viscosity), PV(plastic viscosity), YP(yield value), FL
aPI(API dehydration), measurement result is in Table 4:
Table 4 embodiment semi-finals suppresses the high temperature resistance experimental result of saturated salt-water drilling fluid system
From above-described embodiment, can find out, the drilling fluid system described in embodiment 4, after 230 ℃ of aging 16h, still has good rheological and lower filter loss, illustrates that it has good high temperature resistance, saline-alkaline tolerance.
The anti-soil inferior of embodiment 8 pollutes experiment
The high temperature resistance of embodiment 4 preparations is suppressed by force to saturated salt-water drilling fluid system and carry out calcium bentonite pollution experiment, by the quality that adds water, be 100%, by percentage to the quality, add respectively 2%, 4%, 6%, 8% calcium bentonite, according to < < GB/T 16783.1-2006 industrial gas oil drilling fluid on-the-spot test part 1: rheological and API filtration before and after the 200 ℃ of aging 16h of method evaluation in water-base drilling fluid > >, wherein location parameter has AV(apparent viscosity), PV(plastic viscosity), YP(yield value), FL
aPI(API dehydration), measurement result is in Table 5:
1#: embodiment 4 adds 2% calcium bentonite; 2#: embodiment 4 adds 4% calcium bentonite; 3#: embodiment 4 adds 6% calcium bentonite; 4#: embodiment 4 adds 8% calcium bentonite
The anticalcium wilkinite that table 5 embodiment semi-finals suppresses saturated salt-water drilling fluid system pollutes experimental result.
Embodiment 9 calcium fouling resistance experiments
The high temperature resistance of embodiment 4 preparations is suppressed by force to saturated salt-water drilling fluid system and carry out sulfuric-resisting calcium contamination experiment, by the quality that adds water, be 100%, by percentage to the quality, add respectively 0.5%, 1% calcium sulfate, according to < < GB/T 16783.1-2006 industrial gas oil drilling fluid on-the-spot test part 1: rheological and API filtration before and after the 200 ℃ of aging 16h of method evaluation in water-base drilling fluid > >, wherein location parameter has AV(apparent viscosity), PV(plastic viscosity), YP(yield value), FL
aPI(API dehydration), measurement result is in Table 6:
1#: embodiment 4 adds 0.5% calcium sulfate, 2#: embodiment 4 adds 1% calcium sulfate
Table 6 embodiment semi-finals suppresses the calcium fouling resistance experimental result of saturated salt-water drilling fluid system
Experimental result by embodiment 8, embodiment 9 finds out, preferred drilling fluid composition is under saturated salt condition, and anticalcium wilkinite pollutes and reaches 8%, anti-gypsum pollutes and reaches 1%, illustrates that the preferred drilling fluid system of the present invention has stronger contamination resistance.
Claims (7)
1. the strong inhibited drilling fluid system of high-temperature resisting and salt-resisting, is characterized in that, by the quality that adds water, is 100%, by percentage to the quality, contains following material:
Bentonite slurry 2-7%;
Alkaline conditioner 0.1-0.3%;
Shale control agent 0.3%-2%;
Heat resisting fluid loss reducing agent A 0.5-4%;
Heat and salinity tolerance fluid loss agent B 0.5-4%;
Shutoff anti-sloughing agent 1%-7%.
2. according to the drilling fluid system described in claim 1, it is characterized in that: the strong inhibited drilling fluid system of described high-temperature resisting and salt-resisting is carried out according to following step:
Step 1, as the case may be actual amount and the ratio of definite each treatment agent;
Step 2, is added to the water wilkinite, and prehydration is processed 24 hours;
Step 3, in the bentonite slurry after prehydration, proportionally add successively heat resisting fluid loss reducing agent A, high-temperature resisting and salt-resisting fluid loss agent B, shale control agent, shutoff anti-sloughing agent, and dissolving or the deployment conditions of observing every kind for the treatment of agent, after a kind for the treatment of agent fully dissolves or disperses, add again lower a kind for the treatment of agent, until all add;
Step 4, the alkaline conditioner of finally using said ratio by pH regulator between 8-10.
3. drilling fluid system as claimed in claim 1 or 2, is characterized in that: described alkaline conditioner is one or both in sodium hydroxide or sodium carbonate.
4. drilling fluid system as described in claim 1-3 any one, is characterized in that: described shale control agent is amido polyalcohols, and one or more monomer polymerizations or condensation in oxyethane, propylene oxide, organic amine form;
As led to the compound of formula I:
Wherein, R is H or CH
3; N is the integer between 5-20, repeateding unit number.
5. drilling fluid system as described in claim 1-4 any one, it is characterized in that: described heat resisting fluid loss reducing agent A is nitrile silicon polymer, by 2-ammonium acrylate-2-methyl propane sulfonic acid (AMPS), ammonium acrylate (AM), vinyl cyanide (AN), vinylformic acid (AA) and silane coupling agent, be polymerized;
As led to the compound of formula II:
Wherein, a, b, c, d are the integer between 50-1000, repeateding unit number.
6. drilling fluid system as described in claim 1-5 any one, is characterized in that: described heat and salinity tolerance fluid loss agent B is alkene monomer polymer.
7. drilling fluid system as described in claim 1-6 any one, is characterized in that: described shutoff anti-sloughing agent is sulfonated gilsonite.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104610938A (en) * | 2015-01-22 | 2015-05-13 | 中国石油集团渤海钻探工程有限公司 | High temperature and salt resistance encapsulating agent for drilling fluid and preparation method of high temperature and salt resistance encapsulating agent |
| CN105017475A (en) * | 2015-06-29 | 2015-11-04 | 山东得顺源石油科技有限公司 | Tackifying and filtrate reducing agent for low soil phase and high density drilling fluid, and preparation method thereof |
| CN113337256A (en) * | 2021-05-24 | 2021-09-03 | 西南石油大学 | Preparation method of high-temperature-resistant high-performance water-based drilling fluid capable of replacing oil with water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113337256A (en) * | 2021-05-24 | 2021-09-03 | 西南石油大学 | Preparation method of high-temperature-resistant high-performance water-based drilling fluid capable of replacing oil with water |
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Application publication date: 20140917 |