CN102827590B - High-efficiency semi-permeable membrane inhibitor for drilling fluid and preparation method thereof - Google Patents
High-efficiency semi-permeable membrane inhibitor for drilling fluid and preparation method thereof Download PDFInfo
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- CN102827590B CN102827590B CN201210351325.5A CN201210351325A CN102827590B CN 102827590 B CN102827590 B CN 102827590B CN 201210351325 A CN201210351325 A CN 201210351325A CN 102827590 B CN102827590 B CN 102827590B
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Abstract
The invention relates to a high-efficiency semi-permeable membrane inhibitor for drilling fluid and a preparation method thereof, belonging to the technical field of chemical assistants for petroleum drilling. The semi-permeable membrane inhibitor is prepared from sodium silicate, trichloromethyl silane, sodium hydroxide, phosphate starch and water through a special process; and the preparation process is simple, the preparation cost is low, and the semi-permeable membrane efficiency can be up to 80% or above. The shale hydration, expansion and dispersion capacities of the high-efficiency semi-permeable membrane inhibitor is higher than that of other inhibitors and is far higher than that of anionic polymers and zwitterionic copolymers; and the drill chip recovery rate can be up to 97% or above. Sodium methyl siliconate generated in the reaction reacts with sodium silicate to generate an organic silicon compound which has fine high-temperature resistance; the high-temperature and high-pressure filter loss is 16ml and is much less than that of the existing product (>=20ml); and environment-polluting substances can not be produced, thereby ensuring that the high-efficiency semi-permeable membrane inhibitor is green and environment-friendly. The invention solves the problems that the existing inhibitor production process is complicated, a large number of environment-polluting substances can be produced in use, the high-temperature resistance and the drill chip pollution resistance are poor and the preparation cost is high.
Description
Technical field
The present invention relates to efficient semi-permeable membranes inhibitor and preparation method thereof for a kind of drilling fluid, belong to oil drilling auxiliary chemicals technical field.
Background technology
Mud shale in petroleum drilling operation runs into water and there will be the phenomenons such as hydration swelling, dispersion, very easily causes the accidents such as slump in, bit freezing.The reason of slump in unstability is because pore pressure spreads institute extremely, and therefore, controlling hole pressure diffusion is to maintain the key that the borehole wall is firm.The means of controlling at present hole pressure diffusion are in drilling fluid, to add shale control agent, but existing shale control agent is not only expensive, complex manufacturing, and high temperature resistance, anti-cuttings contamination ability, also can produce the material of a large amount of contaminate environment, be unfavorable for wellbore stability, can not meet environmental requirement.
Summary of the invention
The object of the invention is to, the raw materials such as a kind of employing water glass, silicone resin, phosphate ester starch, sodium hydroxide are provided, by special process, be prepared from, there is good high temperature resistance, anti-cuttings contamination performance and strong rejection capability energy, do not produce contaminate environment material, environmental protection, and production technique is simple, cheap for manufacturing cost.Can solve existing shale control agent complex manufacturing, during use, produce a large amount of contaminate environment materials, and high temperature resistance, anti-cuttings contamination ability, efficient semi-permeable membranes inhibitor and preparation method thereof for drilling fluid of the high problem of manufacturing cost.
The present invention realizes above-mentioned purpose by the following technical solutions:
An efficient semi-permeable membranes inhibitor for drilling fluid, is characterized in that, it is made by the raw material of following weight percent:
Water glass 17.5%,
Trichloromethyl silane 1%,
Sodium hydroxide 2.2%,
Phosphate ester starch 10.1%,
Water 69.2%.
Above-mentioned drilling fluid comprises the steps: by the preparation method of efficient semi-permeable membranes inhibitor
The first step: 0.7% water is joined in reactor, and the temperature in reactor is normal temperature, then adds 0.5% sodium hydroxide, stirs 15～25 minutes, is mixed with aqueous sodium hydroxide solution;
Second step: add 1% trichloromethyl silane in aqueous sodium hydroxide solution, after stirring, the temperature in reactor is risen to 80～90 ℃, react 1 hour, generate methyl silicon sodium alcoholate;
The 3rd step: add 1.7% sodium hydroxide, 3.5% water, 17.5% water glass successively in reactor, and to keep the temperature in reactor be 80～90 ℃, stir 30 minutes, make to add raw material to mix with the methyl silicon sodium alcoholate in reactor;
The 4th step: again to adding 10.1% phosphate ester starch and remaining 65% water in reactor, and the temperature in reactor is risen to 100～110 ℃, react 2 hours, make efficient semi-permeable membranes inhibitor product for drilling fluid;
The 5th step: by the product making with putting in storage after plastic tank metering packing.
This drilling fluid with efficient semi-permeable membranes inhibitor owing to adopting water glass, trichloromethyl silane, sodium hydroxide, phosphate ester starch and water to be prepared from through above-mentioned special process, and sodium hydroxide reacts the methyl silicon sodium alcoholate generating with trichloromethyl silane be a kind of organosilicon stablizer, in molecule, contain oleophilic drainage group alkyl, with after adsorption by clay, be exposed to outer end, there is wettability reversal, can improve the hydration shell of surface of clay, play the effect that keeps clay, improve the stability of drilling fluid, can suppress pulping, keep good rheological.In addition; silicate has silicon-oxy tetrahedron structure; the compound of the silicon such as silicate that can be on the borehole wall, Si oxide is combined; the complex compound characteristic forming is highly stable; can on the borehole wall, form one deck and there is some strength; and hard " the sealing shell " with performance of semi-permeable membrane; at the peripheral protective layer that forms of the borehole wall; stop water and drilling fluid to enter stratum, effectively reached the migration that prevents stratum hydration swelling, bedding crack, shutoff stratum, prevents clay particle in stratum, the object that prevents slump in and protection hydrocarbon zone.
The present invention's beneficial effect is compared with prior art:
This drilling fluid is simple, cheap for manufacturing cost by efficient semi-permeable membranes inhibitor manufacture craft, and its semipermeable membrane efficiency can reach more than 80%.The ability that Shale Hydration is expanded, disperseed is strong compared with other inhibitor, and much larger than negatively charged ion, amphoteric ion polymer, its cuttings recovery can reach more than 97%.The methyl silicon sodium alcoholate generating in reaction reacts the silicoorganic compound that generate and has good high temperature resistant property with water glass, high temperature and high pre ssure filtration is 16ml, and be generally >=20ml of the high temperature and high pre ssure filtration of currently available products.And do not produce contaminate environment material, environmental protection.Solved prior art complex manufacturing, during use, can produce a large amount of contaminate environment materials, high temperature resistance, anti-cuttings contamination ability, the problem that manufacturing cost is high.
Embodiment
The drilling fluid of producing 1000 ㎏ of take is below example with efficient semi-permeable membranes inhibitor, and the invention will be further described.
First by above-mentioned raw material weight per-cent, take raw material:
Water glass 175 ㎏,
Trichloromethyl silane 10 ㎏,
Sodium hydroxide 22 ㎏,
Phosphate ester starch 101 ㎏,
Water 692 ㎏.
Concrete preparation method is as follows:
The first step: first the water of 7 ㎏ is joined in reactor, the temperature in reactor is normal temperature, 20 ℃.The sodium hydroxide that adds again 5 ㎏, stirs 20 minutes, is mixed with aqueous sodium hydroxide solution.
Second step: add the trichloromethyl silane of 10 ㎏ in the aqueous sodium hydroxide solution of the first step preparation, after stirring, the temperature in reactor is risen to 85 ℃, react 1 hour, generate methyl silicon sodium alcoholate.
Its chemical principle is as follows:
The 3rd step: add the water glass of the sodium hydroxide of 17 ㎏, the water of 35 ㎏ and 175 ㎏ successively in reactor again, and to keep the temperature in reactor be 85 ℃, stir 30 minutes, the raw material adding is mixed with the methyl silicon sodium alcoholate in reactor.
The 4th step: add the phosphate ester starch of 101 ㎏ and the water of remaining 650 ㎏ again in reactor, and the temperature in reactor is risen to 105 ℃, react 2 hours, make efficient semi-permeable membranes inhibitor product for drilling fluid;
The 5th step: by the product making plastic tank metering packing, every barrel of net weight 50 ㎏, warehouse-in is preserved.
The effect of each raw material is as follows in the present invention:
The aqueous solution of water glass claims water glass, and cohesive force is strong, acid resistance and good heat resistance, and intensity is higher.In the present invention, making heat-resistant agent uses.
Trichloromethyl silane claims again silicone resin, is that a class by silica structure cell formation is subject to heat solidifiable and forms the resin of tridimensional network, has excellent thermo-oxidative stability and good heat-resisting, cold-resistant, weather-proof, hydrophobicity performance.In the present invention, making heat-resistant agent uses.Trichloromethyl silane reacts the methyl silicon sodium alcoholate generating with aqueous sodium hydroxide solution be a kind of organosilicon stablizer, in molecule, contain oleophilic drainage group alkyl, with after adsorption by clay, be exposed to outer end, there is wettability reversal, can improve the hydration shell of surface of clay, play the effect that keeps clay, can improve the stability of drilling fluid, and can suppress pulping, keep good rheological.
Sodium hydroxide is commonly called as caustic soda, caustic soda, and its aqueous solution is strong basicity; Industrial ion exchange membrane sodium hydroxide should meet standard GB/T/T 11199-89; Generally make moisture absorber; Sodium hydroxide or the good catalyst of many organic reactions, wherein most typical is the hydrolysis reaction of ester; Also can produce large calorimetric with mineral acid generation neutralization reaction, generate corresponding salt.In the present invention, making catalyzer uses.
Phosphate ester starch is a kind of inorganic acid ester, foodstuff additive, and stability is high, generally with sodium-salt form, exists, and dissociates and electronegative in the aqueous solution, belongs to negative ion starch derivative, has cold water swelling property, and slurries can not congeal when low temperature.Even repeatedly congeal several times, after dissolving, its slurries still keep good level and smooth, mobile and emulsifying property.Stable viscosity, good fluidity, serous coat is transparent, tough, high resilience, wear resistance strong and easily destarch.In the present invention, making dispersion emulsifier uses.
The above is the embodiment of this invention, above-mentioned not illustrating is construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field can make an amendment or be out of shape above-mentioned embodiment after having read this specification sheets, and does not deviate from the spirit and scope of the invention.
Claims (1)
1. a drilling fluid semi-permeable membranes inhibitor, is characterized in that, it is made by the raw material of following weight percent:
Water glass 17.5%,
Trichloromethyl silane 1%,
Sodium hydroxide 2.2%,
Phosphate ester starch 10.1%,
Water 69.2%;
Above-mentioned drilling fluid comprises the steps: by the preparation method of semi-permeable membranes inhibitor
The first step: 0.7% water is joined in reactor, and the temperature in reactor is normal temperature, then adds 0.5% sodium hydroxide, stirs 15～25 minutes, is mixed with aqueous sodium hydroxide solution;
Second step: add 1% trichloromethyl silane in aqueous sodium hydroxide solution, after stirring, the temperature in reactor is risen to 80～90 ℃, react 1 hour, generate methyl silicon sodium alcoholate;
The 3rd step: add 1.7% sodium hydroxide, 3.5% water, 17.5% water glass successively in reactor, and to keep the temperature in reactor be 80～90 ℃, stir 30 minutes, make to add raw material to mix with the methyl silicon sodium alcoholate in reactor;
The 4th step: again to adding 10.1% phosphate ester starch and remaining 65% water in reactor, and the temperature in reactor is risen to 100～110 ℃, react 2 hours, make semi-permeable membranes inhibitor product for drilling fluid;
The 5th step: by the product making with putting in storage after plastic tank metering packing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103937473B (en) * | 2014-03-27 | 2016-06-29 | 中国石油大学(华东) | A kind of organosilicon water shutoff agent and preparation method thereof |
| CN104558217B (en) * | 2014-12-30 | 2017-02-01 | 北京中科日升科技有限公司 | cross-linked starch for drilling fluid and preparation method thereof |
| CN109971438B (en) * | 2017-12-28 | 2021-05-18 | 中国石油化工股份有限公司 | Modified starch coated anti-sloughing agent for drilling fluid and preparation method thereof |
| CN109735314B (en) * | 2019-02-28 | 2021-07-20 | 吉林大学 | Organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluid system |
| CN112209958A (en) * | 2020-09-17 | 2021-01-12 | 江苏吉良新材料科技有限公司 | Preparation method and device of cement water repellent |
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