CN101914371A - Rectorite saturated brine drilling fluid for drilling under rock salt deep stratum - Google Patents
Rectorite saturated brine drilling fluid for drilling under rock salt deep stratum Download PDFInfo
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- CN101914371A CN101914371A CN 201010262989 CN201010262989A CN101914371A CN 101914371 A CN101914371 A CN 101914371A CN 201010262989 CN201010262989 CN 201010262989 CN 201010262989 A CN201010262989 A CN 201010262989A CN 101914371 A CN101914371 A CN 101914371A
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- rectorite leng
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Abstract
The invention discloses a rectorite saturated brine drilling fluid for drilling under a rock salt deep stratum and belongs to the technical field of drilling and oil exploitation. The drilling fluid is prepared from an auxiliary agent, NaCl and water according to a certain proportion, wherein the auxiliary agent at least comprises 1 to 8 percent of sodium base rectorite, 0.2 to 14 percent of main fluid loss agent, 0.1 to 5 percent of auxiliary fluid loss agent, 0.1 to 1 percent of coating agent, 1 to 5 percent of wall protective agent, 1 to 5 percent of lubricant, 0.1 to 0.5 percent of antifoaming agent and 0.1 to 0.5 percent of NaOH, wherein the NaCl is in a saturated state in the drilling fluid. The drilling fluid of the invention can still keep good rheological property, prop-carrying capacity and filtration property resistance at the highest temperature of 200 DEG C, can quickly and safely drill in a salt layer, guarantees the smooth drilling operation under the deep stratum salt layer and is particularly suitable for drilling under the rock salt deep stratum and extracting rock cores.
Description
Technical field
The present invention relates to a kind ofly be used under the rock salt deep stratum probing and use the rectorite leng saturated salt-water drilling fluid, belong to probing, technical field of petroleum extraction.
Background technology
Drilling fluid is being played the part of crucial role in probing, drilling engineering technical field, and the quality of property of drilling fluid and quality has played critical effect to the success or not of probing, oil production.Because the develop rapidly of industry in modern times and the quick raising of people's living standard, the only more and more difficult needs that satisfy people's productive life of the Mineral resources on more shallow stratum of utilization and easy exploiting stratum.Be accompanied by the tremendous development of probing level, people begin to turn one's attention to the Mineral resources of enriching that deep stratum contains gradually, want especially hydrocarbon resources of resource to deep stratum, have become the megatrend in exploitation of mineral resources field, the whole world.In China, as western part of oil and gas output master take-over zone, 52% of 73% and natural gas source amount of its petroleum resources amount all is embedded in deep stratum.With respect to other countries, the petroleum resources of China are contained situation its singularity again.In existing petroleum resources, there are 10%～20% petroleum resources to bury and under the salt deposit of depths, stratum, are difficult to exploitation.Therefore, how in the salt deposit of depths, stratum, successfully to creep into the frontier nature problem that the scientist that becomes the CNPC field extremely pays close attention to.
During the deep stratum drilling well, along with well depth increases, bottom temperature also can raise.High temperature mainly shows as the influence of high temperature to additive for drilling fluid and clay to the influence of drilling fluid.Along with temperature raises, clay dispersion, passivation and additive for drilling fluid lost efficacy gradually in the drilling fluid, and property of drilling fluid is worsened, and caused to carry boring to be hampered, and sand return is in bad order, can't judge strata condition, bit freezing, bury drills, the accident of undergauge.We can say that the quality of clay performance has determined the quality of property of drilling fluid to a great extent.
In addition, can run into following main difficult technical when using the ortho-water base drilling fluid to creep into salt deposit: 1. common drilling fluid can make the halite layer dissolving, causes hole diameter to enlarge, and forms out-of-round oversized hole, causes cementing quality defective; 2. after halite layer is dissolved by drilling fluid, calcium wherein, magnesium ion enter in the drilling fluid, cause " salt contamination ", " calcium is invaded ", make the rheological property of drilling fluid worsen rapidly, may cause fluid loss to rise rapidly, problems such as rheological property degenerates, cause carrying bore be hampered, sand return is in bad order, can't judge accidents such as strata condition, bit freezing, bury drills, undergauge.
Rectorite leng is a kind of clay mineral with special construction.Its structures shape it have stronger interlayer adsorptivity, cationic exchange and pulping performance, and have good high temperature resistant property.Owing to have montmorillonite layer in the rectorite leng crystalline structure, so rectorite leng has the physical and chemical performance of montmorillonite; Again because rectorite leng has mica layer, so its thermostability is better than wilkinite.Prepare drilling fluid with rectorite leng, help to improve the high temperature resistant property of drilling fluid.
Summary of the invention
The objective of the invention is to remedy the deficiencies in the prior art, a kind of sodium base rectorite leng saturated salt-water drilling fluid be provided, this drilling fluid be applicable to carry out safely and fast creeping under the deep stratum salt deposit, drilling operation.
Realize that the technical scheme that the object of the invention adopted is:
A kind of probing rectorite leng saturated salt-water drilling fluid that is used under the rock salt deep stratum, this drilling fluid is an auxiliary agent, the mixture of NaCl and water, described auxiliary agent comprises sodium base rectorite leng at least, main fluid loss agent, auxiliary fluid loss agent, coating agent, the retaining wall agent, lubricant for drilling fluids, defoamer and NaOH, the mass volume ratio of each component and drilling fluid is respectively in the auxiliary agent: 1～8% sodium base rectorite leng, 0.2～14% main fluid loss agent, 0.1～5% auxiliary fluid loss agent, 0.1～1% coating agent, 1～5% retaining wall agent, 1～5% lubricant for drilling fluids, 0.1～0.5% defoamer and 0.1～0.5%NaOH, NaCl is state of saturation in drilling fluid, and the unit of described mass volume ratio is Kg/m
3
Described main fluid loss agent is any or several mixture among polymer filtrate reducer COP-LFL, sulfonated phenol formaldehyde resin, copolymer PAMS601 or the copolymer PAMS900.
Described auxiliary fluid loss agent is any or several mixture among PAM, LV-CMC, HV-CMC or the CMS.
Described coating agent is any or several mixture in FA367, PAC141 or the KPAM coating agent.
Described retaining wall agent is the retaining wall agent of sulfonated gilsonite powder or wide spectrum retaining wall agent GSP or the mixture of the two.
Described lubricant for drilling fluids is any or several mixture in RH-2, TNH-2 or the CNS lubricant.
Described defoamer is that silicon is any or several mixtures in the defoamer.
Press the above-mentioned raw materials proportioning, earlier sodium base rectorite leng is mixed with water, stirring obtains sodium base rectorite leng slurry, adds other auxiliary agents then and stirs, and adding NaCl fully dissolves it and reaches capacity, and mixes, and promptly gets drilling fluid of the present invention.When needing the raising drilling fluid to carry the ability of drilling cuttings, add high-viscosity sodium carboxymethyl cellulose (HV-CMC); When needing to reduce the filter loss of drilling fluid, any among adding polymer filtrate reducer COP-LFL, sulfonated phenolic resin SMP-2, copolymer PAMS601 or the copolymer PAMS900 or several mixtures.Each person's add-on is determined according to the standard of construction requirement.
The present invention is directed to the technical barrier in the drilling process under the deep stratum salt deposit, is that the basis has prepared the high temperature resistance rectorite leng saturated salt-water drilling fluid that is applicable under the deep stratum salt deposit with sodium base rectorite leng, provides guarantee smoothly for deep stratum drilling well work.Compared with prior art, the present invention has the following advantages:
(1) drilling fluid high temperature resistant property of the present invention is good, and not obvious in the highest 200 ℃ of aging down back rheological properties variations, heat is rolled the every performance index in back still can satisfy the current standard of petroleum industry, and heat is rolled press filtration vector FL in the normal temperature of back
APIFilter loss is less than 5mL, and high temperature and high pre ssure filtration is less than 15mL.
(2) drilling fluid of the present invention is the saturated salt-water drilling fluid system, can avoid the salt deposit dissolving to cause hole diameter to enlarge, form out-of-round oversized hole, cause the underproof difficult problem of cementing quality effectively, thereby prevent the generation of down-hole accident.
(3) drilling fluid of the present invention has good rheological and prop-carrying capacity, can guarantee the good grittiness energy of taking under lower funnel viscosity.About 55s than under the low viscosity, ratio of dynamic shear force/yield value to plastic viscosity YP/PV can reach 0.30～0.50, and ratio of dynamic shear force/yield value to plastic viscosity can be adjusted according to the actual needs that creep into.Can guarantee when using drilling fluid of the present invention to creep into that drilling cuttings is smooth, discharge fast that drilling process can carry out fast.
(4) filter loss of drilling fluid of the present invention can be controlled at lower level, and can be according to the actual needs that creep into, by adjusting components contents in the drilling fluid composition, with press filtration vector FL in the normal temperature
APIAnd high temperature and high pre ssure filtration FL
HthpFurther reduce, avoid the problems that cause owing to drilling fluid filtration is excessive.
(5) because sodium base rectorite leng can be now with the current, need not as sodium bentonite, need the prehydration time more than 24 hours, saved the time of preparation drilling fluid, suitable reply burst accident.
(6) the various raw materials in the drilling fluid composition of the present invention are the industrial goods of common scale operation, and price is comparatively cheap.This is for reducing drilling fluid cost, and the expenditure of control phase of drilling engineering provides and provided powerful support for.
Embodiment
The present invention is further illustrated below by specific embodiment, but protection content of the present invention is not limited to following examples.
The low-viscosity sodium carboxymethyl cellulose (LV-CMC) that the present invention is used and the physicochemical property of high-viscosity sodium carboxymethyl cellulose (HV-CMC) meet the oil and gas industry standard SY 5093-92 of the People's Republic of China (PRC).The physicochemical property of polymer fluid loss reducing additive for drilling fluid COP-LFL meets the technical indicator of table 1.
Table 1.
Embodiment 1:
In the drilling fluid of present embodiment each component and with the mass volume ratio (unit: Kg/m of drilling fluid
3) be respectively: 4% sodium base rectorite leng, 14% copolymer PAMS601,0.1% sodium starch glycolate (CMS), 0.1% coating agent FA367,0.2% sulfonated gilsonite powder FT-1,2.5% wide spectrum retaining wall agent GSP, 3% solid lubricant for well drilling liquid RH-2,1% lubricant for drilling fluids CNS, 0.1% silicone oil, 0.1%NaOH, all the other are NaCl and water, and wherein NaCl is a state of saturation.
According to said ratio, sodium base rectorite leng is mixed with water, stir and obtain sodium base rectorite leng slurry, stir after adding other various auxiliary agents then, add NaCl and fully dissolve and NaCl is reached capacity in drilling fluid, promptly obtain being used for probing rectorite leng saturated salt-water drilling fluid under the rock salt deep stratum after mixing.
The performance index of the drilling fluid that present embodiment is prepared (operative norm GB/T 16783-1997): density is 1.20g/cm
3, viscosity is 54s, press filtration vector FL in the normal temperature
APIBe 4.5mL, high temperature and high pre ssure filtration FL
HthpBe 13.6mL, plastic viscosity PV is 23mPaS, and yield value YP is 8Pa, and ratio of dynamic shear force/yield value to plastic viscosity YP/PV is 0.36Pa/mPaS, zero gel θ
1Be 0.5,10-minute gel strength θ
10Be 1.5, hmc is less than 0.5mm.
Embodiment 2:
In the drilling fluid of present embodiment each component and with the mass volume ratio (unit: Kg/m of drilling fluid
3) be respectively: 8% sodium base rectorite leng, 0.5% polymer filtrate reducer COP-LFL, 2.5% copolymer PAMS900,4% polyacrylamide (PAM), 0.1% coating agent KPAM, 0.5% coating agent PAC141,1% wide spectrum retaining wall agent GSP, 1% lubricant for drilling fluids TNH-2,0.5% defoamer, 0.5%NaOH, all the other are NaCl and water, and wherein NaCl is a state of saturation.
By said ratio, adopt the method preparation identical with embodiment 1, promptly obtain being used for drilling under the rock salt deep stratum and use the rectorite leng saturated salt-water drilling fluid.
The performance index of the drilling fluid that this example is prepared (operative norm GB/T 16783-1997): density is 1.20g/cm
3, viscosity is 53s, press filtration vector FL in the normal temperature
APIBe 4.8mL, high temperature and high pre ssure filtration FL
HthpBe 14.0mL, plastic viscosity PV is 21mPaS, and yield value YP is 8Pa, and ratio of dynamic shear force/yield value to plastic viscosity YP/PV is 0.38Pa/mPaS, zero gel θ
1Be 0.5,10-minute gel strength θ
10Be 1.0, hmc is less than 0.5mm.
Embodiment 3:
In the drilling fluid of present embodiment each component and with the mass volume ratio (unit: Kg/m of drilling fluid
3) be respectively: 1% sodium base rectorite leng, 0.2% polymer filtrate reducer COP-LFL, 5%HV-CMC, 1% coating agent KPAM, 0.5% sulfonated gilsonite powder FT-1,5% lubricant for drilling fluids CNS, 0.3% defoamer, 0.2%NaOH, all the other are NaCl and water, and wherein NaCl is a state of saturation.
By said ratio, adopt the method preparation identical with embodiment 1, promptly obtain being used for drilling under the rock salt deep stratum and use the rectorite leng saturated salt-water drilling fluid.
The performance index of the drilling fluid that this example is prepared (operative norm GB/T 16783-1997): density is 1.20g/cm
3, viscosity is 51s, press filtration vector FL in the normal temperature
APIBe 4.7mL, high temperature and high pre ssure filtration FL
HthpBe 13.8mL, plastic viscosity PV is 23mPaS, and yield value YP is 8Pa, and ratio of dynamic shear force/yield value to plastic viscosity YP/PV is 0.35Pa/mPaS, zero gel θ
1Be 0.5,10-minute gel strength θ
10Be 1.0, hmc is less than 0.5mm.
Embodiment 4:
In the drilling fluid of present embodiment each component and with the mass volume ratio (unit: Kg/m of drilling fluid
3) be respectively: 2% sodium base rectorite leng, 8% sulfonated phenolic resin SMP-2,2% copolymer PAMS900,0.1% coating agent FA367,0.1%LV-CMC, 0.5%CMS, 5% wide spectrum retaining wall agent GSP, 5% lubricant for drilling fluids CNS, 0.3% defoamer, 0.1%NaOH, all the other are NaCl and water, and wherein NaCl is a state of saturation.
By said ratio, adopt the method preparation identical with embodiment 1, promptly obtain being used for drilling under the rock salt deep stratum and use the rectorite leng saturated salt-water drilling fluid.
The performance index of the drilling fluid that this example is prepared (operative norm GB/T 16783-1997): density is 1.20g/cm
3, viscosity is 52s, press filtration vector FL in the normal temperature
APIBe 4.8mL, high temperature and high pre ssure filtration FL
HthpBe 14.5mL, plastic viscosity PV is 21mPaS, and yield value YP is 8Pa, and ratio of dynamic shear force/yield value to plastic viscosity YP/PV is 0.38Pa/mPaS, zero gel θ
1Be 0.5,10-minute gel strength θ
10Be 1.5, hmc is less than 0.5mm.
Embodiment 5:
In the drilling fluid of present embodiment each component and with the mass volume ratio (unit: Kg/m of drilling fluid
3) be respectively: 4% sodium base rectorite leng, 1% copolymer PAMS601,9% sulfonated phenolic resin SMP-2,2%CMS, 0.3% coating agent PAC141,1% sulfonated gilsonite powder FT-1,2% solid lubricant for well drilling liquid RH-2,1% lubricant for drilling fluids TNH-2,0.1% defoamer, 0.3%NaOH, all the other are NaCl and water, and wherein NaCl is a state of saturation.
By said ratio, adopt the method preparation identical with embodiment 1, promptly obtain being used for drilling under the rock salt deep stratum and use the rectorite leng saturated salt-water drilling fluid.
The performance index of the drilling fluid that this example is prepared (operative norm GB/T 16783-1997): density is 1.20g/cm
3, viscosity is 53s, press filtration vector FL in the normal temperature
APIBe 4.8mL, high temperature and high pre ssure filtration FL
HthpBe 14.4mL, plastic viscosity PV is 24mPaS, and yield value YP is 9Pa, and ratio of dynamic shear force/yield value to plastic viscosity YP/PV is 0.375Pa/mPaS, zero gel θ
1Be 0.5,10-minute gel strength θ
10Be 1.0, hmc is less than 0.5mm.
It is defoamer that defoamer among the present invention can adopt XPJ series silicon, and as XPJ-1, XPJ-2, silicone oil etc., also can adopt other silicon is defoamer.
Claims (7)
1. one kind is used for probing rectorite leng saturated salt-water drilling fluid under the rock salt deep stratum, it is characterized in that this drilling fluid is an auxiliary agent, the mixture of NaCl and water, described auxiliary agent comprises sodium base rectorite leng at least, main fluid loss agent, auxiliary fluid loss agent, coating agent, the retaining wall agent, lubricant for drilling fluids, defoamer and NaOH, the mass volume ratio of each component and drilling fluid is respectively in the auxiliary agent: 1～8% sodium base rectorite leng, 0.2～14% main fluid loss agent, 0.1～5% auxiliary fluid loss agent, 0.1～1% coating agent, 1～5% retaining wall agent, 1～5% lubricant for drilling fluids, 0.1～0.5% defoamer and 0.1～0.5%NaOH, NaCl is state of saturation in drilling fluid, and the unit of described mass volume ratio is Kg/m
3
2. according to claim 1ly be used under the rock salt deep stratum probing and use the rectorite leng saturated salt-water drilling fluid, it is characterized in that: described main fluid loss agent is any or several mixture among polymer filtrate reducer COP-LFL, sulfonated phenolic resin SMP-2, copolymer PAMS601 or the copolymer PAMS900.
3. according to claim 1ly be used under the rock salt deep stratum probing and use the rectorite leng water-base drilling fluid, it is characterized in that: described drilling fluid is any or several mixtures among PAM, LV-CMC, HV-CMC or the CMS with assisting fluid loss agent.
4. according to claim 1ly be used under the rock salt deep stratum probing and use the rectorite leng saturated salt-water drilling fluid, it is characterized in that: described coating agent is any or several mixture in FA367, PAC141 or the KPAM coating agent.
5. according to claim 1ly be used under the rock salt deep stratum probing and use the rectorite leng saturated salt-water drilling fluid, it is characterized in that: described retaining wall agent is the retaining wall agent of sulfonated gilsonite powder or wide spectrum retaining wall agent GSP or the mixture of the two.
6. according to claim 1ly be used under the rock salt deep stratum probing and use the rectorite leng saturated salt-water drilling fluid, it is characterized in that: described lubricant for drilling fluids is any or several mixture in RH-2, TNH-2 or the CNS lubricant.
7. according to claim 1ly be used under the rock salt deep stratum probing and use the rectorite leng saturated salt-water drilling fluid, it is characterized in that: described defoamer is that silicon is any or several mixtures in the defoamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010262989 CN101914371A (en) | 2010-08-25 | 2010-08-25 | Rectorite saturated brine drilling fluid for drilling under rock salt deep stratum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010262989 CN101914371A (en) | 2010-08-25 | 2010-08-25 | Rectorite saturated brine drilling fluid for drilling under rock salt deep stratum |
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| CN 201010262989 Pending CN101914371A (en) | 2010-08-25 | 2010-08-25 | Rectorite saturated brine drilling fluid for drilling under rock salt deep stratum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408881A (en) * | 2011-10-17 | 2012-04-11 | 北京探矿工程研究所 | Drilling flushing fluid and preparation method thereof |
| CN103642473A (en) * | 2013-12-19 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Polymer saturated salt water drilling solution suitable for drilling gas storage warehouse |
| CN104087272A (en) * | 2014-05-30 | 2014-10-08 | 中国石油化工集团公司 | Composite saturated brine drilling fluid capable of resisting CO3<2-> and HCO3<-> pollution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1341692A (en) * | 2001-09-28 | 2002-03-27 | 湖北名流累托石科技股份有限公司 | Modified Leituoshi stone for drilling liquor and its production mehtod |
| CN1548498A (en) * | 2003-05-16 | 2004-11-24 | 韩文峰 | Oil layer protecting drilling fluid without clay |
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2010
- 2010-08-25 CN CN 201010262989 patent/CN101914371A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341692A (en) * | 2001-09-28 | 2002-03-27 | 湖北名流累托石科技股份有限公司 | Modified Leituoshi stone for drilling liquor and its production mehtod |
| CN1548498A (en) * | 2003-05-16 | 2004-11-24 | 韩文峰 | Oil layer protecting drilling fluid without clay |
Non-Patent Citations (1)
| Title |
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| 《钻井液与完井液》 20090131 赵雄虎等 "抗高温累托石水基钻井液" 摘要，第1、2.1-2.2节 1-7 第26卷, 第1期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408881A (en) * | 2011-10-17 | 2012-04-11 | 北京探矿工程研究所 | Drilling flushing fluid and preparation method thereof |
| CN102408881B (en) * | 2011-10-17 | 2013-06-19 | 北京探矿工程研究所 | Drilling flushing fluid and preparation method thereof |
| CN103642473A (en) * | 2013-12-19 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Polymer saturated salt water drilling solution suitable for drilling gas storage warehouse |
| CN104087272A (en) * | 2014-05-30 | 2014-10-08 | 中国石油化工集团公司 | Composite saturated brine drilling fluid capable of resisting CO3<2-> and HCO3<-> pollution |
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Application publication date: 20101215 |