CN105733528B - A kind of drilling shale low-density fluorescence drilling fluid - Google Patents
A kind of drilling shale low-density fluorescence drilling fluid Download PDFInfo
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- CN105733528B CN105733528B CN201610136671.XA CN201610136671A CN105733528B CN 105733528 B CN105733528 B CN 105733528B CN 201610136671 A CN201610136671 A CN 201610136671A CN 105733528 B CN105733528 B CN 105733528B
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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
- C09K2208/34—Lubricant additives
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
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Abstract
The present invention relates to a kind of drilling shale low-density fluorescence drilling fluids for shale gas exploitation.It can overcome borehole well instability, and shale formation aquation is inhibited to cave in.Its technical solution is to prepare the raw materials used component of the drilling fluid and its content is, mass unit for gram：Sodium carbonate 1.5 2.5；Drilling fluid bentonite 30 50；Extracting and cutting agent PAC 141 10 20；Drilling fluid coating agent FBY 502 4；High-temperature resisting and salt-resisting fluid loss additive WSG 099 10 20；Viscosity depressant for drilling fluid JN 1Z 0.3 0.8；Bloom calcium carbonate BZ 350,030 50；Lubricant for drilling fluids SYP 2 10 20；The anti-collapse sealing agent FDT 150 30 50 of drilling fluid；Emulsified wax JLRP 4,020 30；Tap water 900 1000；Lye regulation system pH with 40% is 8.5, adds in barite and adjusts its density to 1.20g/cm3, this drilling fluid is made.This drilling fluid system environmental pollution is small, has good rheological characteristic, low Poison, inhibits shut-off capacity strong, for shale drilling well.
Description
Technical field
The present invention relates to a kind of drilling shale low-density fluorescence drilling fluid for shale gas exploitation, particularly suitable for micro-
The drilling of the long net horizontal section of shale of fracture development.
Background technology
Shale gas well is generally using oil base drilling fluid both at home and abroad at present, since oil base drilling fluid can improve hygroscopicity shale
Capillary pressure prevents intrusion of the drilling fluid to shale, can be effectively by using oil base drilling fluid and synthetic base drilling fluid
Solve the problems, such as hole instability.It is external using oil base drilling fluid system in terms of shale gas horizontal well wellbore stability is coped with
Current most effective measure.Even if using oil base drilling fluid, the shale formation of fracture or stratification development, it is necessary to strengthen envelope
It is stifled, to reduce pressure transmission caused by liquid enters stratum (block fluid channel).Oil base drilling fluid is in lubrication, anti-sticking and drop resistance
The advantage for having water-base drilling fluid incomparable in terms of effect drags pressure problem when can be to avoid slide drilling, this is also that it is wide
Where the basic reason of general application.But it causes to hinder since oil base working solution makes the wettability modification of low permeability pay and gas-bearing formation
Evil, is greatly lowered reservoir permeability, so as to reduce oil well output.Indoor core experiment shows, when core is changed by hydrophilic
During oleophylic, recovery ratio falls to 17% by 51%.Therefore, should production cautiously be opened using oil base drilling fluid brill in low permeability pay
Layer, when especially having emulsifier, surfactant in oil base drilling fluid.
Advantage and disadvantage water-base drilling fluid advantage compared to oil base drilling fluid has：1. environmental protection；2. natural gas leaching is easily found；3. temperature
It is smaller to rheology impact；4. cost is relatively low；5. meeting leakage to be easily processed, shortcoming has：1. borehole wall stability is poor；It is 2. hot steady
It is qualitative relatively poor, it is easy to high temperature gel；3. resistance tocrocking poor (solid phase and CO2、H2S gaseous contaminations), safeguard processing workload
Greatly；4. lubricate anti-sticking scarce capacity.Therefore, it develops a kind of novel water-based drilling fluid that can be suitably used for shale formation and substitutes oil base brill
Well liquid can solve the key technology and domestic and international page that the problems such as wellbore stability, reservoir pollution is then current shale gas drilling well
Where the difficult point of rock drilling well.
Invention content
The purpose of the present invention is：Borehole well instability during in order to overcome the problems, such as to use water-base drilling fluid to creep into shale formation at present,
Shale formation aquation is inhibited to cave in, can effectively block the micro-nano slit of shale, provides a kind of drilling shale low-density thus
Fluorescence drilling fluid.
In order to achieve the above object, the present invention uses following technical scheme：A kind of drilling shale low-density fluorescence drilling well
Liquid, it is characterized in that prepare the raw materials used component of the drilling fluid and content is, wherein mass unit for gram：
The NaOH solution regulation system pH value for being 40% with mass percentage concentration is 8.5；It is liquid-tight that drilling well is adjusted with barite
It spends to 1.20g/cm3。
The present invention it is a kind of drilling shale be with the preparation method of low-density fluorescence drilling fluid：
It first measures 1000 grams of tap water and water temperature is risen to 70 DEG C, 30-50 is added under low speed 500r/min electric stirrings
Gram drilling fluid bentonite, stir 10min, add in 1.5-2.5 grams of Na2CO3It is stirred for 30min, prehydration under normal temperature and pressure
24h；10-20 grams of extracting and cutting agent PAC-141 stirring 6min is added under high speed 8000r/min electric stirrings again, in low speed 500r/
2-4 grams of drilling fluid is added under min electric stirrings and stirs 5min with coating agent FBY-50, adds in 10-20 grams of high-temperature resisting and salt-resisting drop filter
Agent WSG-099 stirring 5min are lost, add in 0.3-0.8 grams of viscosity depressant for drilling fluid JN-1Z stirrings 5min；Then 30-50 grams is added in
Bloom calcium carbonate BZ-3500 stirs 15min, adds in 10-20 grams of lubricant for drilling fluids SYP-2 stirring 5min, adds in 30-50 grams
Drilling fluid stirs 5min with anti-collapse sealing agent FDT-150, adds in 20-30 grams of emulsified wax JLRP-40 stirrings 10min；Finally use
NaOH adds water to be configured to 40% lye, and regulation system pH is 8.5.Barite regulating density of drilling liquid is added in after stirring 30min
To 1.20g/cm3This low-density fluorescence drilling fluid is made in stirring 1 hour.
Drilling fluid bentonite, Na used in above-mentioned preparation method2CO3, extracting and cutting agent PAC-141, drilling fluid coating agent FBY-
50th, high-temperature resisting and salt-resisting fluid loss additive WSG-099, viscosity depressant for drilling fluid JN-1Z, bloom calcium carbonate BZ-3500, drilling fluid profit
Lubrication prescription SYP-2, drilling fluid are to sell product in the market with anti-collapse sealing agent FDT-150, emulsified wax JLRP-40, barite,
It is strictly examined when purchasing by professional standard or enterprise's mark, eligible could use.Specifically it is shown in Table 1.
1 low-density fluorescence drilling fluid base stock detail list of table
Drilling shale provided by the invention low density water base drilling fluid and current used shale drilling fluid system phase
Than having the advantages that：1. this drilling fluid is small compared to oil base drilling fluid environmental pollution；2. inhibit to block energy with stronger
Power；3. it can effectively reduce caving pressure；4. fluorescent material can track drilling process at any time；5. cost is relatively low；6. meet leakage
It is easily processed.
Specific embodiment：
With reference to specific example, the present invention is further illustrated
Example 1：A kind of preparation method for creeping into shale low-density fluorescence drilling fluid.
It first measures 1000 grams of tap water and water temperature is risen to 70 DEG C, 30 grams are added under low speed 500r/min electric stirrings
Drilling fluid bentonite, stirring 10min add in 1.5 grams of Na2CO3Be stirred for 30min, under normal temperature and pressure prehydration for 24 hours after, in height
15 grams of extracting and cutting agent PAC-141 stirring 6min are added under fast 8000r/min electric stirrings, then under low speed 500r/min electric stirrings
It adds in 2 grams of drilling fluids and stirs 5min with coating agent FBY-50, add in 10 grams of high-temperature resisting and salt-resisting fluid loss additive WSG-099 stirrings
5min adds in 0.5 gram of viscosity depressant for drilling fluid JN-1Z stirring 5min, adds in 40 grams of bloom calcium carbonate BZ-3500 stirring 15min,
10 grams of lubricant for drilling fluids SYP-2 stirring 5min are added in, 40 grams of drilling fluids is added in and is stirred with anti-collapse sealing agent FDT-150
5min adds in 25 grams of emulsified wax JLRP-40 stirring 10min, and 40% lye is configured to NaOH plus water, and regulation system pH is
8.5.Barite regulating density of drilling liquid is added in 1.20g/cm after stirring 30min3This low-density fluorescence is made in stirring 1 hour
Drilling fluid.
Example 2：Rolling rate of recovery measure has been carried out to drilling fluid system of the present invention using XGRL-2 types roller heating furnace.
2 low-density fluorescence drilling fluid system rolling rate of recovery experimental results of table
| Drilling fluid composition | Experiment condition | Recycle quality (g) | The rate of recovery (%) |
| Clear water+50g red beds soil | 105℃/16h | 5.54 | 11.08 |
| Low-density fluorescence drilling fluid system+50g red beds soil | 105℃/16h | 48.32 | 96.64 |
Note：1) red beds soil is Sichuan red beds soil landwaste, and shale is appeared appears for long 7 shale, is 6~10 mesh, the rate of recovery
To cross the 40 mesh rate of recovery；2) result is 2 experimental data mean values in table.
3 low-density fluorescence drilling fluid system linear expansion experimental results of table
Note：1) core is drilling fluid bentonite (matching puddled soil) compression moulding；2) after filtrate rolls 105 DEG C/16h for system heat
The filtrate of extrusion；3) result is 2 experimental data mean values in table.
By table 2, the rolling rate of recovery of the table 3 low-density fluorescence drilling fluid and linear expansion rate experiment it is found that rolling recycling
Rate reaches more than 95%, 16h linear expansion rates and only has 22.46% to have preferable inhibition aquation dispersion and dilatancy.
Example 3：It is rolled using XGRL-2 type roller heating furnaces Continuous Heat, tests the low-density fluorescence drilling fluid thermal stability
Effect.
4 low-density fluorescence drilling fluid system Evaluation of Thermal Stability of table
5 low-density fluorescence drilling fluid system temperature resistance merit ratings of table
The system knowable to the thermal stability results of table 4 is glued, is cut with filter loss as the increase of rolling time changes little, tool
There is good thermal stability.It understands that the low-density fluorescence drilling fluid glues under the conditions of 150 DEG C from the temperature resistance capacity experimental of table 5 to cut greatly
Amplitude reduction, HTHP dehydrations increase considerably, but can maintain rheological characteristic, HTHP dehydrations well under the conditions of 120 DEG C, can temperature resistance
120℃。
Claims (2)
1. a kind of drilling shale low-density fluorescence drilling fluid, it is characterized in that：It prepares the raw materials used component of the drilling fluid and contains
It measures and is, mass unit is gram：
The NaOH solution regulation system pH value for being 40% with mass percentage concentration is 8.5；With barite regulating density of drilling liquid extremely
1.20g/cm3。
2. a kind of preparation method of drilling fluid as described in claim 1, it is characterized in that：1000 grams of tap water is first measured by water temperature
70 DEG C are risen to, 30-50 grams of drilling fluid bentonite is added under low speed 500r/min electric stirrings, stirs 10min, is added in
1.5-2.5 grams of Na2CO3It is stirred for 30min, prehydration is for 24 hours under normal temperature and pressure；It is added under high speed 8000r/min electric stirrings again
10-20 grams of extracting and cutting agent PAC-141 stirs 6min, and 2-4 grams of drilling fluid coating agent is added under low speed 500r/min electric stirrings
FBY-50 stirs 5min, adds in 10-20 grams of high-temperature resisting and salt-resisting fluid loss additive WSG-099 stirring 5min, adds in 0.3-0.8 grams of drilling well
Liquid stirs 5min with thinner JN-1Z；Then 30-50 grams of bloom calcium carbonate BZ-3500 stirring 15min is added in, adds in 10-20 grams
Lubricant for drilling fluids SYP-2 stirs 5min, adds in 30-50 grams of drilling fluid and stirs 5min with anti-collapse sealing agent FDT-150, adds in
20-30 grams of emulsified wax JLRP-40 stirs 10min；Finally water is added to be configured to 40% lye with NaOH, regulation system pH is
8.5, barite regulating density of drilling liquid is added in 1.20g/cm after stirring 30min3This low-density fluorescence is made in stirring 1 hour
Drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610136671.XA CN105733528B (en) | 2016-03-11 | 2016-03-11 | A kind of drilling shale low-density fluorescence drilling fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610136671.XA CN105733528B (en) | 2016-03-11 | 2016-03-11 | A kind of drilling shale low-density fluorescence drilling fluid |
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| CN105733528A CN105733528A (en) | 2016-07-06 |
| CN105733528B true CN105733528B (en) | 2018-06-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106381134B (en) * | 2016-08-25 | 2017-10-27 | 中国石油大学(北京) | Drilling fluid additive composition and its application and water-base drilling fluid and its application suitable for coal bed gas well |
| CN106833564B (en) * | 2017-01-06 | 2019-07-09 | 中国石油天然气集团公司 | A kind of water-base drilling fluid and its application suitable for shale gas long well section horizontal well |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479649A (en) * | 2014-12-31 | 2015-04-01 | 西南石油大学 | Low density water-based drilling fluid for drilling into shale |
| CN104592960A (en) * | 2014-12-31 | 2015-05-06 | 西南石油大学 | Amphoteric potassium-based polyalcohol water-based drilling fluid for drilling shale |
| CN105176503A (en) * | 2015-09-15 | 2015-12-23 | 西南石油大学 | Cationic polymer water-based drilling fluid for drilling shale |
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2016
- 2016-03-11 CN CN201610136671.XA patent/CN105733528B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479649A (en) * | 2014-12-31 | 2015-04-01 | 西南石油大学 | Low density water-based drilling fluid for drilling into shale |
| CN104592960A (en) * | 2014-12-31 | 2015-05-06 | 西南石油大学 | Amphoteric potassium-based polyalcohol water-based drilling fluid for drilling shale |
| CN105176503A (en) * | 2015-09-15 | 2015-12-23 | 西南石油大学 | Cationic polymer water-based drilling fluid for drilling shale |
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