CN103881669B - A kind of complex salt aqueous drilling fluid - Google Patents
A kind of complex salt aqueous drilling fluid Download PDFInfo
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- CN103881669B CN103881669B CN201410137054.2A CN201410137054A CN103881669B CN 103881669 B CN103881669 B CN 103881669B CN 201410137054 A CN201410137054 A CN 201410137054A CN 103881669 B CN103881669 B CN 103881669B
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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
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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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
- C09K8/06—Clay-free compositions
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K8/10—Cellulose or derivatives thereof
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Abstract
The invention discloses a kind of complex salt aqueous drilling fluid, comprise the component of following parts by weight: 100 parts of water, sodium hydroxide 0.12～0.17 part, polyanion cellulose 0.15～0.25 part, carboxymethyl cellulose 0～0.3 part, calcium carbonate 2～5 parts, sulfonation tannic extract 0.8～1.2 parts, graphite powder 0.8～1.3 parts, fluid loss additive A0～1 part, fluid loss additive B0.8～1.2 parts, sodium formate 2～10 parts, sodium chloride 3～15 parts, potassium chloride 1.8～2.5 parts.The complex salt aqueous drilling fluid of the present invention, serves good inhibitory action to the water sensitivity mineral in reservoir, low to reservoir permeability nocuity；Free clay phase, solid concentration are low, and the injury to stratum is the lightest；Have that rheological characteristic is good, strong inhibition capability, lower-cost advantage；Extemporaneous preparation technique is simple, it is simple to operation and maintenance, can be efficiently applied to the protectiveness drillng operation of low hole, low pressure, low permeability reservoir.
Description
Technical field
The invention belongs to drilling liquid technology field, be specifically related to a kind of complex salt aqueous drilling fluid.
Background technology
Drilling fluid is in drilling process, the circulation flushing medium used in hole.The effect of drilling fluid is mainly: at the bottom of clear well,
Cutting carring；Cool down and lubricate drill bit and drill string；Balance rock of borehole lateral pressure, forms filter cake at the borehole wall, closes and stablize
The borehole wall；Control strata pressure；Suspension landwaste and heavy weight additive；Effectively transmit hydraulic efficiency；Hydraulic fracture rock etc..Drilling fluid
Water-base drilling fluid, oil base drilling fluid, gaseous type drilling fluid etc. can be divided into by disperse medium (continuous phase).Wherein, application
Widest is water-base drilling fluid.Water-base drilling fluid is a kind of with water as disperse medium, with clay (bentonite), heavy weight additive
And the colloidal sol suspended substance mixed system that various chemical treatments is dispersion phase.In recent years, along with being showing improvement or progress day by day of drilling technique,
In water-base drilling fluid, the complex salt aqueous drilling fluid containing multiple soluble-salt has obtained bigger development.
But, the complex salt aqueous drilling fluid of current domestic and international application is widely used in the high-pressure reservoir of deep-well, ultradeep well, generally
Drilling fluid density is more than 1.20g/cm3, and for formation pore pressure≤1.0g/cm3Normal pressure-low pressure reservoir never carried out multiple
Closing the applied research of salt-water drilling fluid, current complex salt aqueous drilling fluid is not met by the demand of normal pressure-low pressure reservoir drilling well.
Summary of the invention
It is an object of the invention to provide a kind of complex salt aqueous drilling fluid, solve existing complex salt aqueous drilling fluid and can not meet normal pressure
The problem of-low pressure reservoir drilling well demand.
In order to realize object above, the technical solution adopted in the present invention is: a kind of complex salt aqueous drilling fluid, comprises following heavy
Amount number component: 100 parts of water, sodium hydroxide (NaOH) 0.12～0.17 part, polyanion cellulose (PAC) 0.15～
0.25 part, carboxymethyl cellulose (CMC) 0～0.3 part, calcium carbonate (CaCO3) 2～5 parts, sulfonation tannic extract 0.8～1.2
Part, graphite powder 0.8～1.3 parts, fluid loss additive A0～1 part, fluid loss additive B0.8～1.2 parts, sodium formate (HCOONa)
2～10 parts, 3～15 parts of sodium chloride (NaCl), 1.8～2.5 parts of potassium chloride (KCl).
Described polyanion cellulose is high adhesive aggregation anionic cellulose (HV-PAC).
Described carboxymethyl cellulose is low viscous carboxymethyl cellulose (LV-CMC).Carboxymethyl cellulose refers to standard
SY5093-92。
Described fluid loss additive A is salt-resistant polymer fluid loss additive.
Described fluid loss additive B is sulfonated phenol formaldehyde resin.
Described calcium carbonate is calcium carbonate superfine powder.Described calcium carbonate superfine powder be particle diameter be 0.02 μm～the calcium carbonate of 0.1 μm.
The complex salt aqueous drilling fluid of the present invention, use water and sodium hydroxide, polyanion cellulose, calcium carbonate, sulfonation tannic extract,
Graphite powder, sodium formate, sodium chloride, potassium chloride, fluid loss additive etc. compound, and gained complex salt aqueous drilling fluid is in reservoir
Water sensitivity mineral serve good inhibitory action, low to reservoir permeability nocuity；Free clay phase, solid concentration are low,
Solid invasion stratum is less, and the injury to stratum is the lightest；Density size can regulate (1.07～1.17g/cm3), there is stream
Degeneration is good, strong inhibition capability, lower-cost advantage, meets the needs of normal pressure-low pressure reservoir drilling well；Extemporaneous preparation technique is simple,
Convenient to operate and safeguard, the protectiveness drillng operation of low hole, low pressure, low permeability reservoir can be efficiently applied to.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further illustrated.
Embodiment 1
The complex salt aqueous drilling fluid of the present embodiment, comprises the component of following weight: water 100g, sodium hydroxide 0.15g, height are viscous
Polyanion cellulose 0.2g, low viscous carboxymethyl cellulose 0.3g, sulfonated phenol formaldehyde resin 1g, sulfonation tannic extract 1g, ultra-fine carbon
Acid calcium 5g, graphite powder 1g, sodium formate 10g, sodium chloride 15g, potassium chloride 2g.
The preparation method of the complex salt aqueous drilling fluid of the present embodiment is: weigh water, be sequentially added under agitation sodium hydroxide,
High adhesive aggregation anionic cellulose, low viscous carboxymethyl cellulose, sulfonated phenol formaldehyde resin, sulfonation tannic extract, calcium carbonate superfine powder, graphite
Powder, to be mixed uniformly after, be slowly added to sodium formate, sodium chloride, potassium chloride under high-speed stirred, after stirring,
Stand 24h at normal temperatures, to obtain final product.
The complex salt aqueous drilling fluid of the present embodiment is carried out performance test, and result is as shown in table 1.
The performance indications data of table 1 embodiment 1 gained complex salt aqueous drilling fluid
Drilling fluid repression of swelling contrast experiment:
Weighing 15 grams of sodium soil, under 10MPa pressure, pressure makes experiment rock core for 5 minutes, tests respectively under this rock core room temperature
The swell increment of 8h, 16h, 24h in distilled water, embodiment 1 gained drilling fluid medium.Experimental result and data are shown in Table 2.
Table 2 embodiment 1 gained drilling fluid suppresses shale expansion experimental result with distilled water
| 8h expansion rate (%) | 16h expansion rate (%) | 24h expansion rate (%) | |
| Distilled water | 12.34 | 18.03 | 21.83 |
| Embodiment 1 gained drilling fluid | 9.27 | 12.24 | 13.56 |
Drilling fluid suppression dispersibility contrast experiment:
Gather Ordos Basin underground stone box and Shanxi group mud shale drilling cuttings, with 8 mesh and the double-deck sub-sieve screen analysis of 12 mesh,
Collect by 8 mesh, but not by the drilling cuttings of 12 mesh as experiment landwaste；The landwaste of screening is put into the perseverance of 105 DEG C ± 3 DEG C
Temperature baking oven is dried more than 4h, is stored in wide mouthed bottle standby after title to constant weight.
Weigh 50.0g(and be accurate to 0.1g) bore meal particles, load the high-temperature tank filling 350ml embodiment 1 gained drilling fluid
In, cover tightly；The high-temperature tank installing drilling fluid sample is put in the roller furnace that temperature is 85 DEG C, roll 16h；Constant temperature rolls
After 16h, take out high-temperature tank, be cooled to room temperature；Liquid in tank and rock sample are all poured over a length of 0.42mm's of eyelet trim
On sub-sieve, in the groove containing tap water, wet type sieves and washes l min；To tail over rock sample put people 105 DEG C ± 3 DEG C air blast constant temperature do
Dry case is dried 4h；Take out cooling, and stand 24h in atmosphere, then carry out weighing (being accurate to 0.1g), calculate rock
The bits response rate.Experimental result is shown in Table 3.
Table 3 embodiment 1 gained drilling fluid suppression mud stone dispersibility experimental result
| The lower stone box landwaste response rate (%) | The Shanxi group landwaste response rate (%) | |
| For the first time | 91 | 91 |
| It is repeated once | 92 | 92 |
Embodiment 2
The complex salt aqueous drilling fluid of the present embodiment, comprises the component of following weight: water 100g, sodium hydroxide 0.15g, height are viscous
Polyanion cellulose 0.2g, sulfonated phenol formaldehyde resin 1g, sulfonation tannic extract 1g, calcium carbonate superfine powder 2g, graphite powder 1g, anti-salt
Polymer filtrate reducer (GMP-1, commercial goods, purchased from Kuerle, Xinjiang ten thousand Shunda Petroleum Technology Co., Ltd) 1g, first
Acid sodium 2g, sodium chloride 3g, potassium chloride 2g.
The preparation method of the complex salt aqueous drilling fluid of the present embodiment is: weigh water, be sequentially added under agitation sodium hydroxide,
The fall filter of high adhesive aggregation anionic cellulose, sulfonated phenol formaldehyde resin, sulfonation tannic extract, calcium carbonate superfine powder, graphite powder, salt-resistant polymer
Lose agent (GMP-1), to be mixed uniformly after, be slowly added to sodium formate, sodium chloride, potassium chloride under high-speed stirred, treat fully
After stirring, stand 24h at normal temperatures, to obtain final product.
The complex salt aqueous drilling fluid of the present embodiment is carried out performance test, and result is as shown in table 4.
The performance indications data of table 4 embodiment 2 gained complex salt aqueous drilling fluid
Drilling fluid repression of swelling contrast experiment:
Weighing 15 grams of sodium soil, under 10MPa pressure, pressure makes experiment rock core for 5 minutes, tests respectively under this rock core room temperature
The swell increment of 8h, 16h, 24h in distilled water, embodiment 2 gained drilling fluid medium.Experimental result and data are shown in Table 5.
Table 5 embodiment 2 gained drilling fluid suppresses shale expansion experimental result with distilled water
| 8h expansion rate (%) | 16h expansion rate (%) | 24h expansion rate (%) | |
| Distilled water | 12.34 | 18.03 | 21.83 |
| Embodiment 2 gained drilling fluid | 8.27 | 11.21 | 12.47 |
Drilling fluid suppression dispersibility contrast experiment:
Gather Ordos Basin underground stone box and Shanxi group mud shale drilling cuttings, with 8 mesh and the double-deck sub-sieve screen analysis of 12 mesh,
Collect by 8 mesh, but not by the drilling cuttings of 12 mesh as experiment landwaste；The landwaste of screening is put into the perseverance of 105 DEG C ± 3 DEG C
Temperature baking oven is dried more than 4h, is stored in wide mouthed bottle standby after title to constant weight.
Weigh 50.0g(and be accurate to 0.1g) bore meal particles, load the high-temperature tank filling 350ml embodiment 2 gained drilling fluid
In, cover tightly；The high-temperature tank installing drilling fluid sample is put in the roller furnace that temperature is 85 DEG C, roll 16h；Constant temperature rolls
After 16h, take out high-temperature tank, be cooled to room temperature；Liquid in tank and rock sample are all poured over a length of 0.42mm's of eyelet trim
On sub-sieve, in the groove containing tap water, wet type sieves and washes l min；To tail over rock sample put people 105 DEG C ± 3 DEG C air blast constant temperature do
Dry case is dried 4h；Take out cooling, and stand 24h in atmosphere, then carry out weighing (being accurate to 0.1g), calculate rock
The bits response rate.Experimental result is shown in Table 6.
Table 6 embodiment 2 gained drilling fluid suppression mud stone dispersibility experimental result
| The lower stone box landwaste response rate (%) | The Shanxi group landwaste response rate (%) | |
| For the first time | 90 | 98 |
| It is repeated once | 90 | 98 |
Embodiment 3
The complex salt aqueous drilling fluid of the present embodiment, comprises the component of following weight: water 100g, sodium hydroxide 0.12g, height are viscous
Polyanion cellulose 0.15g, low viscous carboxymethyl cellulose 0.15g, sulfonated phenol formaldehyde resin 0.8g, sulfonation tannic extract 1.2g, super
Thin calcium carbonate 3g, graphite powder 0.8g, (GMP-1, commercial goods, purchased from Kuerle, Xinjiang ten thousand for salt-resistant polymer fluid loss additive
Shunda Petroleum Technology Co., Ltd) 0.5g, sodium formate 5g, sodium chloride 5g, potassium chloride 1.8g.
The preparation method of the complex salt aqueous drilling fluid of the present embodiment is: weigh water, be sequentially added under agitation sodium hydroxide,
High adhesive aggregation anionic cellulose, low viscous carboxymethyl cellulose, sulfonated phenol formaldehyde resin, sulfonation tannic extract, calcium carbonate superfine powder, graphite
Powder, salt-resistant polymer fluid loss additive (GMP-1), to be mixed uniformly after, be slowly added to sodium formate, chlorination under high-speed stirred
Sodium, potassium chloride, after stirring, stand 24h at normal temperatures, to obtain final product.
The complex salt aqueous drilling fluid of the present embodiment is carried out performance test, and result is as shown in table 7.
The performance indications data of table 7 embodiment 3 gained complex salt aqueous drilling fluid
Drilling fluid repression of swelling contrast experiment:
Weighing 15 grams of sodium soil, under 10MPa pressure, pressure makes experiment rock core for 5 minutes, tests respectively under this rock core room temperature
The swell increment of 8h, 16h, 24h in distilled water, embodiment 3 gained drilling fluid medium.Experimental result and data are shown in Table 8.
Table 8 embodiment 3 gained drilling fluid suppresses shale expansion experimental result with distilled water
| 8h expansion rate (%) | 16h expansion rate (%) | 24h expansion rate (%) | |
| Distilled water | 12.34 | 18.03 | 21.83 |
| Embodiment 3 gained drilling fluid | 8.35 | 11.35 | 12.53 |
Drilling fluid suppression dispersibility contrast experiment:
Gather Ordos Basin underground stone box and Shanxi group mud shale drilling cuttings, with 8 mesh and the double-deck sub-sieve screen analysis of 12 mesh,
Collect by 8 mesh, but not by the drilling cuttings of 12 mesh as experiment landwaste；The landwaste of screening is put into the perseverance of 105 DEG C ± 3 DEG C
Temperature baking oven is dried more than 4h, is stored in wide mouthed bottle standby after title to constant weight.
Weigh 50.0g(and be accurate to 0.1g) bore meal particles, load the high-temperature tank filling 350ml embodiment 2 gained drilling fluid
In, cover tightly；The high-temperature tank installing drilling fluid sample is put in the roller furnace that temperature is 85 DEG C, roll 16h；Constant temperature rolls
After 16h, take out high-temperature tank, be cooled to room temperature；Liquid in tank and rock sample are all poured over a length of 0.42mm's of eyelet trim
On sub-sieve, in the groove containing tap water, wet type sieves and washes l min；To tail over rock sample put people 105 DEG C ± 3 DEG C air blast constant temperature do
Dry case is dried 4h；Take out cooling, and stand 24h in atmosphere, then carry out weighing (being accurate to 0.1g), calculate rock
The bits response rate.Experimental result is shown in Table 9.
Table 9 embodiment 3 gained drilling fluid suppression mud stone dispersibility experimental result
| The lower stone box landwaste response rate (%) | The Shanxi group landwaste response rate (%) | |
| For the first time | 90 | 98 |
| It is repeated once | 91 | 98 |
Embodiment 4
The complex salt aqueous drilling fluid of the present embodiment, comprises the component of following weight: water 100g, sodium hydroxide 0.17g, height are viscous
Polyanion cellulose 0.25g, sulfonated phenol formaldehyde resin 1.2g, sulfonation tannic extract 0.8g, calcium carbonate superfine powder 4g, graphite powder 1.3g,
Sodium formate 7g, sodium chloride 10g, potassium chloride 2.5g.
The preparation method of the complex salt aqueous drilling fluid of the present embodiment is: weigh water, be sequentially added under agitation sodium hydroxide,
High adhesive aggregation anionic cellulose, sulfonated phenol formaldehyde resin, sulfonation tannic extract, calcium carbonate superfine powder, graphite powder, to be mixed uniformly after,
It is slowly added to sodium formate, sodium chloride, potassium chloride under high-speed stirred, after stirring, stands 24h at normal temperatures,
Obtain.
The complex salt aqueous drilling fluid of the present embodiment is carried out performance test, and result is as shown in table 10.
The performance indications data of table 10 embodiment 4 gained complex salt aqueous drilling fluid
Drilling fluid repression of swelling contrast experiment:
Weighing 15 grams of sodium soil, under 10MPa pressure, pressure makes experiment rock core for 5 minutes, tests respectively under this rock core room temperature
The swell increment of 8h, 16h, 24h in distilled water, embodiment 4 gained drilling fluid medium.Experimental result and data are shown in Table 11.
Table 11 embodiment 4 gained drilling fluid suppresses shale expansion experimental result with distilled water
| 8h expansion rate (%) | 16h expansion rate (%) | 24h expansion rate (%) | |
| Distilled water | 12.34 | 18.03 | 21.83 |
| Embodiment 4 gained drilling fluid | 8.95 | 11.96 | 13.03 |
Drilling fluid suppression dispersibility contrast experiment:
Gather Ordos Basin underground stone box and Shanxi group mud shale drilling cuttings, with 8 mesh and the double-deck sub-sieve screen analysis of 12 mesh,
Collect by 8 mesh, but not by the drilling cuttings of 12 mesh as experiment landwaste；The landwaste of screening is put into the perseverance of 105 DEG C ± 3 DEG C
Temperature baking oven is dried more than 4h, is stored in wide mouthed bottle standby after title to constant weight.
Weigh 50.0g(and be accurate to 0.1g) bore meal particles, load the high-temperature tank filling 350ml embodiment 2 gained drilling fluid
In, cover tightly；The high-temperature tank installing drilling fluid sample is put in the roller furnace that temperature is 85 DEG C, roll 16h；Constant temperature rolls
After 16h, take out high-temperature tank, be cooled to room temperature；Liquid in tank and rock sample are all poured over a length of 0.42mm's of eyelet trim
On sub-sieve, in the groove containing tap water, wet type sieves and washes l min；To tail over rock sample put people 105 DEG C ± 3 DEG C air blast constant temperature do
Dry case is dried 4h；Take out cooling, and stand 24h in atmosphere, then carry out weighing (being accurate to 0.1g), calculate rock
The bits response rate.Experimental result is shown in Table 12.
Table 12 embodiment 4 gained drilling fluid suppression mud stone dispersibility experimental result
| The lower stone box landwaste response rate (%) | The Shanxi group landwaste response rate (%) | |
| For the first time | 91 | 95 |
| It is repeated once | 91 | 96 |
Claims (4)
1. a complex salt aqueous drilling fluid, it is characterised in that: it is made up of the component of following parts by weight: 100 parts of water, hydrogen
Sodium oxide 0.12～0.17 part, polyanion cellulose 0.15～0.25 part, carboxymethyl cellulose 0～0.3 part, calcium carbonate 2～
5 parts, sulfonation tannic extract 0.8～1.2 parts, graphite powder 0.8～1.3 parts, fluid loss additive A 0～1 part, fluid loss additive B 0.8～
1.2 parts, sodium formate 2～10 parts, sodium chloride 3～15 parts, potassium chloride 1.8～2.5 parts；Described fluid loss additive A is anti-salt
Polymer filtrate reducer, described fluid loss additive B is sulfonated phenol formaldehyde resin.
Complex salt aqueous drilling fluid the most according to claim 1, it is characterised in that: described polyanion cellulose is high
Adhesive aggregation anionic cellulose.
Complex salt aqueous drilling fluid the most according to claim 1, it is characterised in that: described carboxymethyl cellulose is low viscous
Carboxymethyl cellulose.
Complex salt aqueous drilling fluid the most according to claim 1, it is characterised in that: described calcium carbonate is calcium carbonate superfine powder.
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| CN105331338A (en) * | 2015-10-14 | 2016-02-17 | 中石化石油工程技术服务有限公司 | Anti-leakage high-performance water-based drilling fluid and preparation method thereof |
| CN117089330A (en) * | 2023-07-07 | 2023-11-21 | 延长油田股份有限公司 | Low-solid-phase composite salt drilling fluid for shale oil horizontal well and preparation method thereof |
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