CN110041901A - A kind of drilling fluid and preparation method thereof for brokenness igneous rock formation drilling - Google Patents
A kind of drilling fluid and preparation method thereof for brokenness igneous rock formation drilling Download PDFInfo
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- CN110041901A CN110041901A CN201810035502.6A CN201810035502A CN110041901A CN 110041901 A CN110041901 A CN 110041901A CN 201810035502 A CN201810035502 A CN 201810035502A CN 110041901 A CN110041901 A CN 110041901A
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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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- 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
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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
- C09K2208/34—Lubricant additives
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Abstract
The present invention relates to a kind of drilling fluids and preparation method thereof for brokenness igneous rock formation drilling of field of oil drilling；The drilling fluid, following components comprising parts by weight meter: 1000 parts of water, 3~4 parts of drilling fluid bentonite, 2~3 parts of soda ash, 2~3 parts of polymer coating agent, polyacrylic acid potassium or 2~3 parts of metal cation polymer, it is 5~10 parts of organic amine inhibitors, anti-collapse to strengthen solid 20~30 parts of wall agent, 20~30 parts of sulfonated phenol formaldehyde resin, 5~10 parts of co-polymer of sulfonate fluid loss additive, 20~30 parts of walchowite, 10~20 parts of salt resistance temperature resistance fluid loss agent, 20~40 parts of calcium carbonate superfine powder, 50~70 parts of potassium chloride, 0~10 part of Organic Friction-Reducing agent, receive 10~20 parts of micron sealing agent；1.30~1.85g/cm is weighed out to density heavy weight additive3；Drilling fluid of the invention has good temperature resistance and lubricity, and inhibition and anti-collapse solid wall are excellent, can effectively prevent collapsing for broken igneous rock formation；Improving Mud Carrying Capacity can also be increased substantially, prevents larger chip off-falling from repeating to grind near drill bit, reduces frictional resistance, improve rate of penetration, guarantee downhole safety.
Description
Technical field
The present invention relates to field of oil drilling, furtherly, be related to it is a kind of for brokenness igneous rock formation drilling
Drilling fluid and preparation method thereof.
Background technique
Xinjiang region Oil-Gas Resource in Tarim Basin is abundant, but drilling well occurs for the Permian System and Ordovician system brokenness igneous rock section
Complicated and down-hole accident is frequent, seriously threatens downhole safety, restricts bit speed.Permian System igneous rock segment length (250~450m),
Lithology is based on basalt, dacite and tufa stone, and with tufa stone, mud stone alternating layers, cementing properties is poor, and heterogeneity is strong, weak spot
More, stratum crushing, cranny development, ' Safe Density Windows are narrow, and well slough and leakage take place frequently in drilling.Ordovician strata pressure is relatively
Low, fracture development, igneous rock intrusion (plutonic rock) caving pressure is higher, same to open time there may be more set pressure systems, makes
Serious at collapsing, underground is complicated.Igneous rock is mainly diabase, and the lithology cuttings density is big, up to 3.02g/cm3, diabase
It is very rigid, there is high abrasive, rate of penetration is slow, and reaming is difficult, and difficulty of construction is big；When boring the chance stratum, there are chip off-fallings, bore
Into in the process, fall to drill bit the palm back or between gap in, cause holding；Due to lithology excessive high hardness, wellbore is excessively regular,
Almost without amplification degree, almost gapless between drill bit and wellbore causes the borehole wall that constantly rubs, causes torque ripple mistake hole diameter
Greatly, blocked portion is easily caused, downhole safety is seriously threatened.
Bar wheat Permian System is mainly thick-layer shape basalt, tufa stone, thin layer diabase folder mud stone, tufaceous mud stone,
Thickness about 200~300m, hardness is big, property is crisp, shear resistance is very weak, and joint is more developed, and the effect of waterpower wedge is obvious, and has
Very strong stress release effect, overall integrity is poor, and the characteristic that easy chip off-falling is collapsed brings greatly safe hidden to wellbore construction
Suffer from.Leap block, which exists, buries deeper igneous rock formation, and Permian System igneous rock segment length, most thick to reach 557m, weak spot is more, rock
Property based on dacite, heterogeneity is strong, stratum crushing, cranny development, easily misses in drilling, seriously threaten underground peace
Entirely, average handling time 178h, extreme influence drilling efficiency.System in Tahe Oilfield along 2 wells, in 101 wells, along 1 well of Xi1Jing, A Dong,
All is bored along the wells such as Bei1Jing and has met diabase intrusive body stratum, it is all different degrees of occur bit bouncing is serious, chip off-falling seriously, blocked portion
Situations such as, the serious accident for lost cone, disconnected fishing cup or even bit freezing occur.Downhole safety is greatly threatened, to wellbore construction
Harm is big, causes great economic loss, is always the problem for perplexing domestic and international petroleum works circle.
The Chinese patent of Publication No. CN105820802A (application No. is 201610260065.9) provides a kind of drilling
Igneous rock is with potassium base asphalitine drilling fluid, and the anti-collapse means used only use asphalitine anti-sloughing agent, and optional range is small, although
It can achieve certain plugging effect, but solid wall effect is poor, for the high igneous rock of the density of the deep formation such as Ordovician system
It is undesirable that intrusive body takes rock effect, solid wall effect.Publication No. CN104277803A's (application No. is 201410451916.9)
Chinese patent provides KCl and blocks caving-preventing drilling fluid, primarily directed to mud shale stratum, using asphalitine sealing agent,
The solid wall agent that forms a film, which cannot be formed, to be cross-linked to form reticular structure and plays the role of stabilizing borehole, and is buried shallowly for stratum, and rock is taken
Ability is weaker.The Chinese patent of Publication No. CN105038737A (application No. is 201510367078.1) provides a kind of strong suppression
Caving-preventing drilling fluid processed, the drilling fluid can not play solid wall invigoration effect just for mud shale stratum to brokenness igneous rock formation,
Leak preventing effect is unobvious, can not effectively be blocked to microfissure and sandstone formation, temperature resistance ability only has 150 DEG C.Publication No.
The Chinese patent of CN105038736A (application No. is 201510335511.3) provides a kind of positive electricity polyalcohols caving-preventing drilling fluid, should
Drilling fluid passes through absorption and cloud point stabilizing borehole, and cloud point is not easy to judge, strong plugging effect is unobvious, and it is solid to be unable to reach reinforcing
The effect of wall, it is 150 DEG C of temperature resistance ability, shallower using stratum.Publication No. CN104962257A (application No. is
201510335509.6) Chinese patent discloses a kind of antifriction type silicate anti-sloughing drilling fluid, using silicon substrate anti-sloughing agent, Bu Nengyou
Effect is directed to brokenness igneous rock formation, mainly for mud shale stratum.Temperature resistance ability is poor, and density range is small, can not strengthen
Brokenness igneous rock formation.Teng Xue is equal clearly, and (the Hudzon such as Teng Xueqing, Wang Kexiong area Permian System igneous rock drilling well drilling fluid is matched
Fang Youxuan in-house laboratory investigation, mineral exploration engineering (rock and soil drilling engineering), in July, 2010) provide a kind of igneous rock drilling well drilling well
Liquid, but it just for the anti-collapse leakproof of Permian System igneous rock, 120 DEG C of temperature resistance ability, leak preventing effect is poor, tentatively solves two
Folded is the wellbore stability and leakproof problem of igneous rock, cannot strengthen the borehole wall.(such as grandson's act, Wang Zhonghua, Wang Shanju press down by force for grandson's act etc.
The research and application oil exploration of the high calcium salt polymer drilling fluid system of property processed and exploitation engineering fault-blcok oil-gas field .2011 7
Month) a kind of drilling fluid is provided, 180 DEG C of the drilling fluid temperature resistance ability, density range is wide, and plugging effect is poor, mainly uses object
Closure means are managed, brokenness igneous rock formation is not used and strengthens solid wall agent, the rock strength of broken formation cannot be improved.Li Yi
Longevity (Li Yishou three-state models deep formation wellbore stability drilling liquid technology studies Xinjiang's oil and gas, in June, 2016)
Using asphalitine anti-sloughing agent stabilizing borehole, plugging while drilling material is added and improves leakage prevention, 120 DEG C of temperature resistance, contamination resistance compared with
By force, Formation bearing pressure can be improved, no effect for strengthening the borehole wall can not improve the rock strength of brokenness igneous rock formation.
Liu Wei (the area's drilling liquid technology oil exploration of the jade backlands Liu Wei and exploitation engineering Chengde Petroleum Higher Junior College journal, 2014
Year December) the drilling fluid temperature resistance ability that provides is stronger, it can reach 180 DEG C, but to be unable to reach nano-micro level other for plugging material,
It can not achieve the effect that strengthen the borehole wall by chemical crosslinking, it is shallower using well section.
If the drilling fluid of brokenness igneous rock safety drilling a kind of therefore can be developed, prevent igneous rock from collapsing chip off-falling, it can be with
The problem of reducing borehole well instability reduces the time of processing down hole problem, drills intrusive body stratum safely, this is bored for reducing
Well overall cost, raising drilling efficiency, expediting exploration development rate all have extremely important social and economic implications.
Summary of the invention
When tying up to brokenness igneous rock formation drilling to solve existing wellbore fluid existing in the prior art, igneous rock
Chip off-falling is not portable, frictional resistance is larger, torque is abnormal, easily collapse, seriously affects the problem of downhole safety drilling, and the present invention proposes
A kind of drilling fluid for brokenness igneous rock formation drilling.It relates in particular to a kind of for brokenness igneous rock formation drilling
Drilling fluid and preparation method thereof.Drilling fluid of the invention has good temperature resistance and lubricity, and inhibition and anti-collapse solid
Wall is excellent, can effectively prevent collapsing for broken igneous rock formation；Improving Mud Carrying Capacity can also be increased substantially, convenient for taking
With big chip off-falling, prevents larger chip off-falling from repeating grinding near drill bit and cause blocked portion and bit bouncing, reduce frictional resistance, improve power auger
Speed guarantees downhole safety.
One of the object of the invention it is a kind of for brokenness igneous rock formation drilling drilling fluid, comprising parts by weight meter with
Lower component:
1000 parts by weight of water；
3~4 parts by weight of drilling fluid bentonite, can be used as extracting and cutting agent,
2~3 parts by weight of soda ash, can promote clay aquation,
2~3 parts by weight of polymer coating agent,
2~3 parts by weight of polyacrylic acid potassium or metal cation polymer can prevent stratum or landwaste from dispersing,
5~10 parts by weight of organic amine inhibitors, preferably 5~7 parts by weight,
Anti-collapse solid 20~30 parts by weight of wall agent of reinforcing, preferably 20~25 parts by weight,
20~30 parts by weight of sulfonated phenol formaldehyde resin, preferably 20~25 parts by weight, can reduce high temperature and pressure dehydration,
5~10 parts by weight of co-polymer of sulfonate fluid loss additive, preferably 5~7 parts by weight,
20~30 parts by weight of walchowite, preferably 20~25 parts by weight can reduce dehydration, improve mud cake,
10~20 parts by weight of salt resistance temperature resistance fluid loss agent, preferably 10~15 parts by weight,
20~40 parts by weight of calcium carbonate superfine powder, preferably 20~30 parts by weight,
50~70 parts by weight of potassium chloride, preferably 50~60 parts by weight,
0~10 parts by weight of Organic Friction-Reducing agent, preferably 5~10 parts by weight,
Receive 10~20 parts by weight of micron sealing agent, preferably 10~15 parts by weight,
1.30~1.85g/cm is weighed out to density heavy weight additive3。
Most preferably, may include the following components of parts by weight meter:
1000 parts by weight of water；
3~4 parts by weight of drilling fluid bentonite,
2~3 parts by weight of soda ash,
2~3 parts by weight of polymer coating agent,
2~3 parts by weight of polyacrylic acid potassium or metal cation polymer,
5~7 parts by weight of organic amine inhibitors,
It is anti-collapse to strengthen solid 20~25 parts by weight of wall agent,
20~25 parts by weight of sulfonated phenol formaldehyde resin,
5~7 parts by weight of co-polymer of sulfonate fluid loss additive,
20~25 parts by weight of walchowite,
10~15 parts by weight of salt resistance temperature resistance fluid loss agent,
20~30 parts by weight of calcium carbonate superfine powder,
50~60 parts by weight of potassium chloride,
5~10 parts by weight of Organic Friction-Reducing agent,
Receive 10~15 parts by weight of micron sealing agent,
1.30~1.85g/cm is weighed out to density heavy weight additive3。
Wherein,
The polymer coating agent can prevent stratum or landwaste from dispersing, and can be selected from amphoteric ion polymer coating agent etc., have
Body can be selected from FA367, PAC141, DBF-2 etc.；
The metal cation polymer can be selected from metal cation polymeric articles commonly used in the art, as PMHH-2,
CMP；
The organic amine inhibitors can inhibit stratum pulping and aquation, prevent hydration swelling and peeling；It can be selected from polyetheramine
Class organic amine shale control agent etc., such as specific product can be selected from SMJA-1, AP-1, NH-1；
It is described it is anti-collapse strengthen solid wall agent and can be selected from the compound anti-sloughing agent of high-quality asphalt of different softening point, containing it is deformable from
Son；It blocks Fractures in shale, cementing reinforcing stratum using particle and distortion particle；It is solid specifically to can be selected from anti-collapse reinforcing commonly used in the art
Wall agent product, such as SMNA-1, DYFT-2, FF-2；
The co-polymer of sulfonate fluid loss additive is the polymer with AA, AMPS and DMDAAC etc. for main raw material(s) synthesis
Fluid loss additive can play the role of reduction dehydration, improve mud cake；Specific can be used is selected from co-polymer of sulfonate commonly used in the art
Fluid loss additive product, such as SMPFL-L, SMPFL-H, DSP-2, DSP-3；
The salt resistance temperature resistance fluid loss agent is selected from the heat and salinity tolerance that graft modification is carried out using lignite or humic acids as raw material
Fluid loss additive can play the role of improving salt-resistance；It specifically can be selected from salt resistance temperature resistance fluid loss agent product commonly used in the art, such as
SML-4,SPC,CSPC-1,DYFT-2；
The calcium carbonate superfine powder is 325 mesh~600 mesh partial sizes (carbonic acid of the primary partical partial size between 0.02~0.1 μm
Calcium), it can be used as rigid-particle filled crack；
The potassium chloride can inhibit stratum pulping, adjust flow pattern, and prevent hydration of mud stone from peeling off；
The Organic Friction-Reducing agent can be selected from the lubricant class containing lithium base, specifically can be selected from Organic Friction-Reducing commonly used in the art
Agent product can reduce the abrasion of casing and drilling tool；Specific optional GXJM-1 freely；
Micron sealing agent of receiving can be modified and disperse using emulsified wax as base oil, and it is other that drop reaches nano-micro level；
The mud stone microcrack of micro/nano level can be blocked, filtrate is reduced and immerses；It specifically can be selected from micron sealing agent of receiving commonly used in the art to produce
Product, such as SMCS or SMRHJ-1；
The density heavy weight additive can be selected from material commonly used in the art, such as barite.
The present invention reaches closure using high inhibition and the principle blocked by force, using asphalitine anti-sloughing agent and a micron sealing agent of receiving
Anti-collapse leak preventing effect, and stablize brokenness igneous rock formation by being chemically crosslinked, polyamine inhibitor and potassium chloride play high inhibition
Effect, can inhibit the clay mineral hydration swelling of igneous rock formation, and can guarantee the wellbore stability of mudstone stratum, and key also uses
The anti-collapse solid wall agent of reinforcing makes the intensity of broken formation in the brokenness igneous rock formation borehole wall by being cross-linked to form reticular structure
It improves, does not collapse；Temperature resistance ability is strong, can reach 180 DEG C, and contamination resistance is strong, and lubricity is good, and frictional resistance can be effectively reduced,
Stabilizing borehole, application can be more than the well depth of 7000m, can take the higher chip off-falling of density or the object that collapses from 7000m well depth out of, reduce
The risk of blocked portion, and can guarantee and the wellbore stability of mudstone stratum and prevent the viscous card of sandstone formation, it is good to take rock well washing effect, inhibits
Property is strong；Seal-off effect is good, while stablizing brokenness igneous rock formation, can also guarantee the stabilization of mud shale stratum, moreover it is possible to anti-
The only infiltration of sandstone blocks microfissure.
The preparation method of the drilling fluid for brokenness igneous rock formation drilling of the two of the object of the invention, it may include
Following steps:
It will include water, drilling fluid bentonite, soda ash, polymer coating agent, polyacrylic acid potassium or metal sun by the dosage
Ionomer, organic amine inhibitors, anti-collapse reinforcing solid wall agent, sulfonated phenol formaldehyde resin, co-polymer of sulfonate fluid loss additive, lignite
Resin, calcium carbonate superfine powder, potassium chloride, Organic Friction-Reducing agent, receives a micron sealing agent, density heavy weight additive and exists salt resistance temperature resistance fluid loss agent
Interior component is successively uniformly slowly added to, be uniformly mixed to get.
Drilling fluid of the invention mainly for the brokenness igneous rock in Tahe Oilfield In Xinjiang work area borehole well instability, easily collapse leakiness,
The features such as cuttings density height is not portable, for the igneous rock formation for easily collapsing, easily collapsing of deep formation, it is ensured that safety is bored
Into, leakproof, anti sloughing effectiveness are obvious, and lubricity is good, take that rock effect is good, prevent the viscous card of sandstone formation, using temperature, density,
The ranges such as layer are wide.
Drilling fluid of the present invention has apparent stable well for the igneous rock on the stratum such as the Permian System, the Ordovician system and intrusive body
Wall and leak preventing effect, inhibition, anti-collapse property and solid wall are strong, and large rock-carrying ability is strong, and lubrication drag reduction is good, temperature resistance contamination resistance
By force, it is significant to take rock well washing effect, borehole wall invigoration effect is obvious, can carry the igneous rock chip off-falling of diameter about 5cm, it is possible to reduce suppress
It bores and blocked portion, guarantee downhole safety improves rate of penetration, high-temperature stability is good, and construction technology is simple, and drilling fluid is effectively reduced
Cost, it is ensured that the wellbore construction safety of brokenness igneous rock formation substantially shortens drilling period, improves drilling efficiency, energy
Fully meet the safety drilling needs of brokenness igneous rock formation.The blank in the field has been filled up in the appearance of this invention.
Currently, well depth is continuously increased during the oil-gas exploration and development of Xinjiang region, the Permian System, Ordovician system etc. are often bored
Brokenness igneous rock and broken igneous rock intrusion stratum are met, down hole problem is more and more, requires drilling fluid also more next
Higher, the present invention can solve these regional borehole well instabilities and take rock problem, can reduce the generation of down hole problem, shorten drilling well
Period improves drilling efficiency, accelerates oil-gas exploration and development progress, has broad application prospects.
Effect of the invention
Drilling fluid of the invention has good inhibition, anti-collapse solid wall, seal-off effect, and lubrication drag reduction effect is good, resists bad
For native pollution capacity up to 35%, landwaste rolling rate of recovery can achieve 95%, 16h shale linear expansion rate≤5%, heat-resisting property
≥180℃.Drilling fluid of the invention is applied to Xinjiang Shun Bei 1-2H well, along the wells Permian System igneous rock such as north 1-3 and Ordovician system fire
The non-blocked portion phenomenon in diagenesis intrusive body stratum, underground is normal, hole diameter rule, good leak-proof effect, smooth for the first time to strangle block along support fruit
Brokenness igneous rock is drilled, drilling period is greatly shortened, improves drilling efficiency.
Drilling fluid of the present invention is suitble to brokenness igneous rock formation, stratum crushing and the stratum easily collapsed.The drilling fluid
System has good inhibition, anti-collapse solid wall and lubrication drag reduction effect, and using simple process, safety and environmental protection can be effective
Reduce drilling fluid cost, effectively solve brokenness igneous rock blocked portion, collapse, leakproof the problems such as, guarantee downhole safety.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.But the present invention is not restricted by the embodiments.
Raw materials used embodiment is commercially available.Specific raw materials used source: polymer coating agent (Xinjiang boundary dragon DBF-2),
(Puyang is anti-collapse to strengthen solid wall agent (middle stone at industry KPAM), organic amine inhibitors (middle petrochemical industry project institute SMJA-1) for polyacrylic acid potassium
Change Chinese Academy of Engineering SMNA-1), sulfonated phenol formaldehyde resin (Shandong get Shun Yuan SMP-2), co-polymer of sulfonate fluid loss additive (middle petrochemical industry project
Institute SMPFL-L), salt resistance temperature resistance fluid loss agent (middle petrochemical industry project institute SML-4), Organic Friction-Reducing agent (Kuerle China bright GXJM-1),
It receives a micron sealing agent (middle petrochemical industry project institute SMCS).
Embodiment 1
Drilling fluid composition: 1000 parts by weight of water, 3 parts by weight of drilling fluid bentonite, 2 parts by weight of soda ash, polymer coating agent 2
Parts by weight, 2 parts by weight of polyacrylic acid potassium, 5 parts by weight of organic amine inhibitors, it is anti-collapse to strengthen solid 20 parts by weight of wall agent, sulfonated phenolic
20 parts by weight of resin, 5 parts by weight of co-polymer of sulfonate fluid loss additive, 20 parts by weight of walchowite, salt resistance temperature resistance fluid loss agent 10
Parts by weight, 20 parts by weight of calcium carbonate superfine powder, 50 parts by weight of potassium chloride, 5 parts by weight of Organic Friction-Reducing agent, 10 weight of micron sealing agent of receiving
Part.
Said components are successively slowly added to by the dosage, be uniformly mixed to get it is described for brokenness igneous rock
The drilling fluid A1 of layer drilling.
The drilling fluid is tested for the property, the results are shown in Table 1.
(performance test methods: " Novel Polyamine shale control agent performance evaluation ", Zhong Hanyi, Huang Weian, woods are learned forever, stone
Oily drilling technique, 2011,39 (6), P45.)
Table 1 inhibits Xuanhua bentonite pulping and heat-resisting property (the following are weight fractions)
| Drilling fluid | Experiment condition | PV | YP |
| The Xuanhua A1+35% bentonite | 88 DEG C of heat rolling 16h | 16 | 14 |
| The Xuanhua A1+35% bentonite | 120 DEG C of heat rolling 16h | 20 | 12 |
| The Xuanhua A1+35% bentonite | 150 DEG C of heat rolling 16h | 23 | 13 |
| The Xuanhua A1+35% bentonite | 180 DEG C of heat rolling 16h | 24 | 16 |
PV: drilling fluid plastic viscosity, mPa.s；YP: drilling fluid yield value, Pa.
The result data of contacts list 1 can see, and the drilling fluid of the application can be very good to inhibit clay pulping.
Embodiment 2
By embodiment 1 prepare described in be used for brokenness igneous rock formation drilling drilling fluid A1 be tested for the property, tie
Fruit is shown in Table 2.
(performance test methods: " modern mud test technology ", Zhang Xiaohua, Luo Xingshu, P37 pages, shale expansion test evaluation
Method.)
Wherein, oil base drilling fluid formula are as follows:+0.3% flow pattern regulator PF_MODIF+3% of+3% organoclay of 360mL white oil
The auxiliary emulsifier PF_MOAT+0.8% wetting agent PF_MOWET+40mL calcium chloride brine of primary emulsion PF_MOEMUL+0.5% is (dense
Degree is 20%)+5% fluid loss additive PF_MOTEX+2% alkalinity regulator CaO.
Cationic sulphonated polymer mud formula are as follows: 4.0% soil+0.2%CPAM+0.1%KPAM+0.5%NW-1
2% liquid of+0.6%JT-888+1.0%SDN-1+2.0%WFT-666+2%SMP-2+2%SPNH+0.3%CaO+
Body lubricant.
Silicate drilling fluid formula are as follows: 4.0% native+1.5% carboxymethyl starch+0.3%K-PAM+3.0% sodium potassium silicate+
2.0% calcium carbonate superfine powder+0.1%XC+0.5%SDR.
2 shale rolling rate of recovery of table
| Drilling fluid | Experiment condition | Shale rolling rate of recovery (%) |
| A1 | 180 DEG C of heat rolling 16h | 95% |
| Cationic sulphonated polymer mud | 180 DEG C of heat rolling 16h | 73% |
| Oil base drilling fluid | 180 DEG C of heat rolling 16h | 93% |
| Silicate drilling fluid | 180 DEG C of heat rolling 16h | 87% |
Note: clear water shale rolling rate of recovery is 32%.
The drilling fluid temperature resistance that the result data of contacts list 2 can see the application is good, strong inhibition capability.
Embodiment 3
By embodiment 1 prepare described in be used for brokenness igneous rock formation drilling drilling fluid A1 be tested for the property, tie
Fruit is shown in Table 3.
(performance test methods: " modern mud test technology ", Zhang Xiaohua, Luo Xingshu, P37 pages, shale expansion test evaluation
Method.)
Table 3 inhibits shale expansion performance
| Drilling fluid | Shale expansion rate (%) |
| A1 | 4.73 |
| Cationic sulphonated polymer mud | 15.32 |
| Oil base drilling fluid | 3.28 |
| Silicate drilling fluid | 10.8 |
| Clear water | 30.28 |
Wherein, cationic sulphonated polymer mud, oil base drilling fluid, the formula of silicate drilling fluid are same as Example 2.
The shale expansion rate of the visible the application drilling fluid of the result of contacts list 3 is low, is conducive to clay stabilization.
The results of property in 2,3 can be shown in Table close to the performance of oil base drilling fluid, this is because considering oil base drilling fluid
Weak to borehole wall hydration, lubricity is good, is conducive to wellbore stability and downhole safety, but at high cost, and post-processing is discarded
Drilling fluid cost is also very high, pollutes environment, so the water-base drilling fluid that research and development are of the invention, close to the property of oil base drilling fluid
Can, but cost reduces very much, and to more environment-friendly.
Embodiment 4
By embodiment 1 prepare described in be used for brokenness igneous rock formation drilling drilling fluid A1 carry out field application.Tool
Body is applied to open igneous rock intrusion drilling along northern 1 well five.Hole collapse is mainly manifested in along 1 well stratum borehole well instability of north and is fallen
Block, former straight hole bit bouncing in the stratum is crept into is serious, and multiple bit freezing complex situations have occurred, return out after squeezing into the thick plug of drilling fluid
More igneous rock chip off-falling.When chip off-falling is larger, it is difficult to be carried out shaft bottom by drilling fluid, brings greater risk to construction,
And the hole anomaly formed, larger difficulty is also brought with downhole safety to the wellbore cleaning in subsequent drilling, it is more than 100 days time-consuming
Final sidetracking, brings about great losses.After sidetracking, uses the described of the preparation of embodiment 1 instead and be used for what brokenness igneous rock formation was crept into
Drilling fluid A1 smoothly drills igneous rock intrusion, and underground is normal, hole diameter rule, and blocked portion does not occur, and performance is stablized, is greatly improved
Drilling efficiency.
Embodiment 5
By embodiment 1 prepare described in be used for brokenness igneous rock formation drilling drilling fluid A1 carry out field application.Tool
Body is applied to open along north 1-3 well two, and naked eye is up to 4800m, and construction is normal, does not occur bit balling and blocked portion phenomenon, average well
Diameter amplification degree is only 6.8%, and Permian System igneous rock is not collapsed and missed.Three open for creeping into Ordovician system Igneous rock invasion
Body, wellbore stability do not have blocked portion phenomenon, make a trip smoothly.Drilling period greatly is shortened, improves drilling efficiency.
Claims (10)
1. a kind of drilling fluid for brokenness igneous rock formation drilling, the following components comprising parts by weight meter:
1000 parts by weight of water；
3~4 parts by weight of drilling fluid bentonite,
2~3 parts by weight of soda ash,
2~3 parts by weight of polymer coating agent,
2~3 parts by weight of polyacrylic acid potassium or metal cation polymer,
5~10 parts by weight of organic amine inhibitors,
It is anti-collapse to strengthen solid 20~30 parts by weight of wall agent,
20~30 parts by weight of sulfonated phenol formaldehyde resin,
5~10 parts by weight of co-polymer of sulfonate fluid loss additive,
20~30 parts by weight of walchowite,
10~20 parts by weight of salt resistance temperature resistance fluid loss agent,
20~40 parts by weight of calcium carbonate superfine powder,
50~70 parts by weight of potassium chloride,
0~10 parts by weight of Organic Friction-Reducing agent,
Receive 10~20 parts by weight of micron sealing agent,
1.30~1.85g/cm is weighed out to density heavy weight additive3。
2. the drilling fluid according to claim 1 for brokenness igneous rock formation drilling, it is characterised in that include weight
The following components of part meter:
1000 parts by weight of water；
3~4 parts by weight of drilling fluid bentonite,
2~3 parts by weight of soda ash,
2~3 parts by weight of polymer coating agent,
2~3 parts by weight of polyacrylic acid potassium or metal cation polymer,
5~7 parts by weight of organic amine inhibitors,
It is anti-collapse to strengthen solid 20~25 parts by weight of wall agent,
20~25 parts by weight of sulfonated phenol formaldehyde resin,
5~7 parts by weight of co-polymer of sulfonate fluid loss additive,
20~25 parts by weight of walchowite,
10~15 parts by weight of salt resistance temperature resistance fluid loss agent,
20~30 parts by weight of calcium carbonate superfine powder,
50~60 parts by weight of potassium chloride,
5~10 parts by weight of Organic Friction-Reducing agent,
Receive 10~15 parts by weight of micron sealing agent,
1.30~1.85g/cm is weighed out to density heavy weight additive3。
3. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The polymer coating agent is selected from amphoteric ion polymer coating agent.
4. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The organic amine inhibitors are selected from polyether amine organic amine shale control agent.
5. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The solid wall agent of anti-collapse reinforcing is the compound anti-sloughing agent of pitch.
6. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The salt resistance temperature resistance fluid loss agent is selected from least one of SML-4, SPC, CSPC-1, DYFT-2.
7. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The partial size of the calcium carbonate superfine powder is 325 mesh~600 mesh.
8. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The Organic Friction-Reducing agent is the lubricant class containing lithium base.
9. the drilling fluid according to claim 1 or 2 for brokenness igneous rock formation drilling, it is characterised in that:
The density heavy weight additive is selected from barite.
10. a kind of preparation of any drilling fluid for brokenness igneous rock formation drilling according to claim 1~9
Method, it is characterised in that the following steps are included:
It will include water, drilling fluid bentonite, soda ash, polymer coating agent, polyacrylic acid potassium or metal cation by the dosage
Polymer, organic amine inhibitors, anti-collapse reinforcing solid wall agent, sulfonated phenol formaldehyde resin, co-polymer of sulfonate fluid loss additive, lignite tree
Rouge, calcium carbonate superfine powder, potassium chloride, Organic Friction-Reducing agent, is received including a micron sealing agent, density heavy weight additive salt resistance temperature resistance fluid loss agent
Component sequentially add, be uniformly mixed to get.
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| CN113637464A (en) * | 2020-04-27 | 2021-11-12 | 中国石油化工股份有限公司 | Anti-sloughing drilling fluid and preparation method and application thereof |
| CN114437678A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Sea-phase fractured zone stratum water-based drilling fluid system and preparation method and application thereof |
| CN114456780A (en) * | 2020-11-10 | 2022-05-10 | 中国石油化工股份有限公司 | High-temperature high-density anti-sloughing drilling fluid composition, drilling fluid thereof, preparation method and application |
| CN114961635A (en) * | 2022-06-10 | 2022-08-30 | 中国石油大学(北京) | Method and device for strengthening wall surrounding rock strength of well drilling well based on electromagnetic waves |
| CN115044355A (en) * | 2022-07-11 | 2022-09-13 | 中海石油(中国)有限公司深圳分公司 | Anti-sloughing drilling fluid and preparation method and application thereof |
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| CN115725279A (en) * | 2021-08-31 | 2023-03-03 | 中国石油化工股份有限公司 | Ultralow-activity strong-inhibition potassium-amino drilling fluid system and preparation method and application thereof |
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| CN116064001B (en) * | 2021-11-01 | 2024-04-09 | 中石化石油工程技术服务有限公司 | Well wall reinforced water-based drilling fluid for shale stratum and application thereof |
| CN114961635A (en) * | 2022-06-10 | 2022-08-30 | 中国石油大学(北京) | Method and device for strengthening wall surrounding rock strength of well drilling well based on electromagnetic waves |
| CN114961635B (en) * | 2022-06-10 | 2023-11-10 | 中国石油大学(北京) | Method and device for strengthening surrounding rock strength of well wall of well drilling based on electromagnetic waves |
| CN115044355A (en) * | 2022-07-11 | 2022-09-13 | 中海石油(中国)有限公司深圳分公司 | Anti-sloughing drilling fluid and preparation method and application thereof |
| CN115044355B (en) * | 2022-07-11 | 2023-12-01 | 中海石油(中国)有限公司深圳分公司 | Anti-collapse drilling fluid and preparation method and application thereof |
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