CN110117487B - Foam discharging agent for drainage and gas recovery of high-inclination horizontal well - Google Patents
Foam discharging agent for drainage and gas recovery of high-inclination horizontal well Download PDFInfo
- Publication number
- CN110117487B CN110117487B CN201910427202.7A CN201910427202A CN110117487B CN 110117487 B CN110117487 B CN 110117487B CN 201910427202 A CN201910427202 A CN 201910427202A CN 110117487 B CN110117487 B CN 110117487B
- Authority
- CN
- China
- Prior art keywords
- foam
- discharging agent
- foam discharging
- drainage
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000006260 foam Substances 0.000 title claims abstract description 93
- 238000007599 discharging Methods 0.000 title claims abstract description 77
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 78
- 239000008258 liquid foam Substances 0.000 claims abstract description 25
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 239000003112 inhibitor Substances 0.000 claims abstract description 19
- 239000011229 interlayer Substances 0.000 claims abstract description 13
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 50
- 239000002994 raw material Substances 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- 238000005201 scrubbing Methods 0.000 claims description 6
- 239000008398 formation water Substances 0.000 claims description 5
- -1 phosphine carboxylic acid Chemical class 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004471 Glycine Substances 0.000 claims description 3
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 3
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Natural products P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 3
- 239000012964 benzotriazole Substances 0.000 claims description 3
- 229960003237 betaine Drugs 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 150000002391 heterocyclic compounds Chemical class 0.000 claims description 3
- 235000019357 lignosulphonate Nutrition 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims description 3
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 claims description 3
- IOJUPLGTWVMSFF-UHFFFAOYSA-N cyclobenzothiazole Natural products C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 239000004088 foaming agent Substances 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 2
- 238000000605 extraction Methods 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000008259 solid foam Substances 0.000 description 6
- 239000013051 drainage agent Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- ZCXGMSGCBDSEOY-UHFFFAOYSA-N 2-benzothiazolsulfonic acid Chemical compound C1=CC=C2SC(S(=O)(=O)O)=NC2=C1 ZCXGMSGCBDSEOY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Images
Classifications
-
- 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
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- C09K2208/32—Anticorrosion additives
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Detergent Compositions (AREA)
Abstract
The invention relates to a foam discharging agent for drainage and gas recovery of a high-inclination horizontal well in a gas recovery process of an oil and gas field. The method solves the problems of special well types and complex well conditions, and can be suitable for large-inclination horizontal wells. The technical scheme is as follows: making a soluble film into a shell, wherein the soluble film is composed of polyvinyl alcohol, polyvinylpyrrolidone or a mixture of the polyvinyl alcohol and the polyvinylpyrrolidone; the interlayer of the elliptical shell is filled with three substances, the whole interlayer is filled with a liquid foam discharging agent, and a granular corrosion inhibitor and a powdery foam stabilizer are mixed in the liquid foam discharging agent; the prepared foam discharging agent for drainage and gas recovery of the high-inclination horizontal well is firstly put into the gas well, and the mutual sliding between the inner membrane and the outer membrane can enable the elliptical foam discharging agent to automatically slide, so that the elliptical foam discharging agent can easily reach the horizontal section, and the foaming agent is dissolved to form a large amount of foam, thereby achieving the foam drainage and gas recovery effects. The invention improves the functions of the foam discharging agent and the water and gas extraction efficiency, saves time and labor, has low cost and is environment-friendly.
Description
Technical Field
The invention relates to a foam discharging agent for drainage gas recovery of a high-inclination horizontal well in a gas recovery process of an oil and gas field, belonging to the field of drainage gas recovery of a gas well.
Background
In the production process of a gas well, when the flow rate of gas in a shaft is reduced to a value that liquid cannot be continuously carried to a wellhead, part of liquid falls back and is gradually accumulated at the bottom of the well to form accumulated liquid. The liquid in the high-pressure well exists in a slug flow mode, so that more formation energy is lost, and the production capacity of the gas well is limited; the gas well can be completely killed by accumulated liquid in the low-pressure well, so that the gas well is shut down due to water flooding, and the yield of the gas well is reduced.
In the common natural gas foam drainage gas recovery method, the injection mode of the foam discharging agent is mainly divided into an underground throwing mode of the solid foam discharging agent and an underground pumping mode of the liquid foam discharging agent. The foam discharging agent injection mode used by the patent application with the application number of 200410073369.1, the patent application with the application number of 201310345196.3, the solid foam drainage agent for gas fields, the patent application with the application number of 201610553209.X, the spherical solid foam discharging agent for natural gas fluctuating horizontal wells and the patent application with the application number of 201710163163.5, the self-disturbance capsule-shaped solid foam discharging agent, is a solid foam discharging agent underground throwing mode. The foam discharging agent used in the patent application with the application number of 201110046870.9, the foam drainage and gas production injection device suitable for the low-temperature environment, the patent application with the application number of 201320738369.3, the patent application with the application number of 201610783247.4, the foam discharging agent assistant for gas wells and the patent application with the application number of 201711006820.1, the liquid salt-resistant foam discharging agent for the high-temperature-resistant gas well, is a liquid foam discharging agent, and the injection mode is an underground pumping mode. The foam water-draining gas-producing process is characterized by that a certain surfactant capable of foaming when it is contacted with water is injected into the well bottom from the well mouth, and after the water accumulated in the well bottom is contacted with foaming agent, it utilizes the stirring of natural gas flow to produce lots of low-density water-containing foam, and said foam can be carried along with gas flow into the ground from the well bottom so as to attain the goal of discharging accumulated liquid in the well bore. For a vertical well, the foam drainage well agent is injected into a shaft and can reach the bottom of the well through self gravity, and for a horizontal well, the foam drainage agent cannot reach the joint of the bottom of the inclined well section and the horizontal section through self gravity and cannot meet foam drainage gas production of the horizontal well. The liquid foam discharging agent has the defects that the liquid foam discharging agent needs to be diluted by water and can be attached to a well wall to cause redundant loss, and the solid foam discharging agent is easy to cause the phenomenon of blocking, so that the foam water discharging and gas production effects can be influenced.
The casing is made of the soluble film with good fluidity and good sliding performance, the liquid foam discharging agent and the additive are filled in the interlayer, and the elliptical foam discharging agent can automatically slide until reaching the lowest end of a shaft of a gas well due to the mutual sliding between the inner film and the outer film, so that the casing is particularly suitable for the underground pumping operation of the liquid foam discharging agent of the horizontal well.
Through research in literature, no report on the idea, product, process design method and theoretical basic research of a foam discharging agent for water drainage and gas recovery of a high-inclination horizontal well is found in the aspect of foam drainage and gas recovery process.
Disclosure of Invention
The invention aims to: in order to maintain the normal production of a gas well and consider the influence of special well types and complex conditions of well conditions, the foam discharging agent is injected into the bottom of the well from a well head and easily reaches the bottom of the well, so that a shaft is filled with foam fluid to achieve the foam water discharging and gas producing effects, and the foam discharging agent for the water discharging and gas producing of the high-inclination horizontal well is particularly provided.
The technical scheme adopted by the invention is as follows: a foam discharging agent for drainage and gas recovery of a high-inclination horizontal well is characterized in that: the soluble film is made into a shell, the inner film is the same as the outer film, the components of the raw materials used by the soluble film are expressed by mass percentage, the mass is gram, and the soluble film comprises the following components: polyvinyl alcohol, polyvinylpyrrolidone or a mixture of the two; the interlayer of the elliptical shell is filled with three substances, when the elliptical foam discharging agent is compressed, the whole interlayer is filled with the liquid foam discharging agent, the corrosion inhibitor and the foam stabilizer are mixed in the liquid foam discharging agent, and the three substances have different solubilities and good compatibility with each other; the corrosion inhibitor comprises the following raw materials in percentage by mass, wherein the mass is gram, and the corrosion inhibitor comprises the following components in percentage by mass: 30-40% of phosphonate, 20-30% of phosphine carboxylic acid, 10-20% of sulfenyl benzothiazole, 12-15% of benzotriazole, 10-12% of sulfonated lignin and 3-5% of heterocyclic compound containing nitrogen and oxygen elements; the corrosion inhibitor is in a regular spherical shape with the diameter of 5-10 mm, the shape of the corrosion inhibitor is granular, and the density of the granules is 1.12-1.18 g/cm3Obey a discrete distribution; the raw materials of the foam stabilizer comprise the following components in percentage by mass, wherein the mass is gramAnd the component is a silica micro powder with the particle size of 37-40 mu m and the density of 2.2-2.66 g/cm3Obey a discrete distribution; the liquid foam discharging agent comprises the following raw materials in percentage by mass, wherein the mass of the raw materials is in grams, and the raw materials comprise the following components in percentage by mass: 43-67% of polyoxyethylene ether sodium acetate, 6-12% of alkyl dimethyl betaine, 12-22% of ethanol, 5-10% of glycine, 0-2% of fatty acid polyoxyethylene ether, 1-5% of sodium toluene sulfonate and 2-6% of sodium chloride; the thickness of the soluble film is about 1-2 mm, and the density of the shell made of the soluble film is 1.10-1.20 g/cm3Greater than the density of formation water; when compressed, the hollow elliptic cylinder is formed, the long axis is 50.5-62 mm, the short axis is 25-31 mm, the internal long axis is 44.5-56 mm, the short axis is 19-25 mm, and the length is 20-30 mm; when the stretching device is stretched, the stretching device is approximately a hollow cylinder, the diameter of the cylinder is 30-40 mm, the diameter of the inner hollow circle is 5-10 mm, and the length of the inner hollow circle is 40-50 mm.
The method for foam drainage gas recovery comprises the following steps: the elliptical foam discharging agent is used in foam drainage and gas recovery, firstly, the prepared foam discharging agent for drainage and gas recovery of a high-inclination horizontal well is put into the gas well, the foam discharging agent can sink to the joint of the bottom of an inclined well section and a horizontal section due to the fact that the whole shell made of a soluble film is larger than the density of water, and under the influence of gravity, the elliptical foam discharging agent can be unfolded to enable the inner film to be tightly attached to the shell, mutual sliding between the inner film and the outer film can enable the elliptical foam discharging agent to automatically slide, the outer film is subjected to upward friction at a node, the friction is increased to prevent sliding, the outer film moves in the direction opposite to the sliding direction, the inner film is dragged by the outer film, the front port is turned out to become the outer film, the outer film is dragged by the inner film, the rear port is retracted into the inner film, telescopic circulation of the inner film and the outer film is changed, so that the elliptical foam discharging agent can easily reach the horizontal section and can automatically slide under the inclination of, in the sliding process, the soluble film shell is dissolved, because of different solubilities, the liquid foam discharging agent in the interlayer is dissolved firstly, the foam stabilizer with smaller particles is dissolved again, and finally the corrosion inhibitor with larger particles is dissolved, and the liquid foam discharging agent is fully mixed with accumulated water to generate foam along with the dissolution of the liquid foam discharging agent, the other two additives, namely the foam stabilizer, have the functions of prolonging and stabilizing foam and keeping long-term performance, and considering that the natural gas well is easy to corrode due to high mineralization degree of formation water and the corrosion inhibitor has the function of corrosion prevention, the two additives have good compatibility with the liquid foam discharging agent, the foam scrubbing agent and the two additives do not react with the soluble film, the additives ensure that the foam is easier to generate and the generated foam is more durable, plays a certain role in inhibiting the corrosion of the pipe column and is easier to discharge the portable liquid, thereby achieving the effect of foam drainage and gas recovery.
Compared with the prior art, the invention has the following beneficial effects: (1) the foam discharging agent for drainage and gas recovery of the high-inclination horizontal well is convenient and simple to use for drainage and gas recovery, and the prepared shell has good fluidity and sliding property, so that the foam discharging agent can reach the lowest end of a well shaft of the horizontal well, the whole well shaft is filled with foam fluid, and the drainage and gas recovery effects are obvious; (2) an additive which is beneficial to foam drainage gas recovery can be filled in the interlayer, so that the function is stronger, and the foam drainage gas recovery effect is enhanced; (3) the operation is simple and safe, the use is convenient and fast, the time and the labor are saved, the cost is low, and the environment is protected.
Drawings
Fig. 1 is a schematic structural view of the expanded foam drainage agent for drainage and gas production of a steep-horizontal well used in the present invention.
Figure 2 is a top view of the present invention used in conjunction with the compression of the foam drainage agent for high slope-horizontal well drainage recovery.
FIG. 3 is a cross-sectional view of the slippage of the foam drainage agent used in the present invention for drainage and gas production of steep-horizontal wells in a well deviation section.
In the figure: 1. the foam scrubbing agent comprises an elliptical shell, 2, a corrosion inhibitor, 3, a foam stabilizer and 4, a liquid foam scrubbing agent.
Detailed Description
The structure and embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The components of the raw materials used by the soluble film are expressed by mass percentage, the mass is given by gram, and the soluble film comprises the following components: polyvinyl alcohol, polyvinylpyrrolidone or a mixture of the two; the corrosion inhibitor in the interlayer comprises the following raw materials in percentage by mass, wherein the mass is gram, and the corrosion inhibitor comprises the following components: 36% of phosphonate, 25% of phosphine carboxylic acid, 11% of sulfobenzothiazole, 13% of benzotriazole, 11% of sulfonated lignin and 4% of heterocyclic compound containing nitrogen and oxygen elements; the foam stabilizer in the interlayer comprises the following raw materials in percentage by mass, wherein the mass is gram, and the components and the constituents are silicon dioxide micro powder; the components of the liquid foam discharging agent raw material in the interlayer are expressed by mass percentage, the mass is gram, and the liquid foam discharging agent comprises the following components: 58% of polyoxyethylene ether sodium acetate, 10% of alkyl dimethyl betaine, 15% of ethanol, 8% of glycine, 1% of fatty acid polyoxyethylene ether, 3% of sodium toluenesulfonate and 5% of sodium chloride.
The corrosion inhibitor is granular, is in a regular spherical shape with the diameter of 5.5mm, and has the particle density of 1.16g/cm3Obey a discrete distribution; the foam stabilizer is selected from silica micropowder with particle diameter of 37 μm and density of 2.4g/cm3Obey a discrete distribution; the thickness of the soluble film is 1mm, and the density of the shell made of the soluble film is 1.20g/cm3Greater than the density of formation water; when the elliptic foam discharging agent is compressed, the elliptic foam discharging agent is a hollow elliptic cylinder, the long axis is 59mm, the short axis is 28mm, the internal long axis is 53mm, the short axis is 22mm, and the length is 25 mm; when the elliptical foam discharging agent is stretched, the foam discharging agent is approximately a hollow cylinder with the diameter of 35mm, the diameter of an internal hollow circle of 8mm and the length of 45 mm.
The dosage of the foam discharging agent and the additive can be designed according to the actual production condition, the stratum characteristics and the well depth structure, thereby achieving the best effect of water discharging and gas production. The elliptical foam discharging agent is used in foam drainage and gas recovery, firstly, the prepared foam discharging agent for drainage and gas recovery of a high-inclination horizontal well is put into the gas well, the foam discharging agent can sink to the joint of the bottom of an inclined well section and a horizontal section due to the fact that the whole shell made of a soluble film is larger than the density of water, and under the influence of gravity, the elliptical foam discharging agent can be unfolded to enable the inner film to be tightly attached to the shell, mutual sliding between the inner film and the outer film can enable the elliptical foam discharging agent to automatically slide, the outer film is subjected to upward friction at a node, the friction is increased to prevent sliding, the outer film moves in the direction opposite to the sliding direction, the inner film is dragged by the outer film, the front port is turned out to become the outer film, the outer film is dragged by the inner film, the rear port is retracted into the inner film, telescopic circulation of the inner film and the outer film is changed, so that the elliptical foam discharging agent can easily reach the horizontal section and can automatically slide under the inclination of, in the sliding process, the soluble film shell is dissolved, because of different solubilities, the liquid foam discharging agent in the interlayer is dissolved firstly, the foam stabilizer with smaller particles is dissolved again, and finally the corrosion inhibitor with larger particles is dissolved, and the liquid foam discharging agent is fully mixed with accumulated water to generate foam along with the dissolution of the liquid foam discharging agent, the other two additives, namely the foam stabilizer, have the functions of prolonging and stabilizing foam and keeping long-term performance, and considering that the natural gas well is easy to corrode due to high mineralization degree of formation water and the corrosion inhibitor has the function of corrosion prevention, the two additives have good compatibility with the liquid foam discharging agent, the foam scrubbing agent and the two additives do not react with the soluble film, the additives ensure that the foam is easier to generate and the generated foam is more durable, plays a certain role in inhibiting the corrosion of the pipe column and is easier to discharge the portable liquid, thereby achieving the effect of foam drainage and gas recovery.
Claims (5)
1. A foam discharging agent for drainage and gas recovery of a high-inclination horizontal well is characterized in that: the soluble film is made into a shell (1), the inner film is the same as the outer film, the components of the raw materials used by the soluble film are expressed by mass percentage, the mass is gram, and the soluble film comprises the following components: polyvinyl alcohol, polyvinylpyrrolidone or a mixture of the two; the thickness of the soluble film is 1-2 mm, and the density of the shell (1) made of the soluble film is 1.10-1.20 g/cm3Greater than the density of formation water; the interlayer of the elliptical shell is filled with three substances, the whole interlayer is filled with a liquid foam discharging agent (4), a corrosion inhibitor (2) and a foam stabilizer (3) which are mixed in the liquid foam discharging agent, and the three substances have different solubilities and good compatibility with each other; the foam scrubbing agent is a hollow elliptic cylinder body when being compressed, the long axis is 50.5-62 mm, the short axis is 25-31 mm, the internal long axis is 44.5-56 mm, the short axis is 19-25 mm, the length is 20-30 mm, and the foam scrubbing agent is a hollow cylinder body when being extended, the diameter is 30-40 mm, the diameter of the internal hollow cylinder is 5-10 mm, and the length is 20-30 mmIs 40 to 50 mm.
2. The foam discharging agent for drainage and gas production of the high-inclination horizontal well according to claim 1 is characterized in that: the corrosion inhibitor comprises the following raw materials in percentage by mass, wherein the mass is gram, and the corrosion inhibitor comprises the following components in percentage by mass: 30-40% of phosphonate, 20-30% of phosphine carboxylic acid, 10-20% of sulfenyl benzothiazole, 12-15% of benzotriazole, 10-12% of sulfonated lignin and 3-5% of heterocyclic compound containing nitrogen and oxygen elements.
3. The foam discharging agent for drainage and gas production of the high-inclination horizontal well according to claim 1 is characterized in that: the corrosion inhibitor is in a regular spherical shape with the diameter of 5-10 mm, the shape of the corrosion inhibitor is granular, and the density of the granules is 1.12-1.18 g/cm3A discrete distribution is followed.
4. The foam discharging agent for drainage and gas production of the high-inclination horizontal well according to claim 1 is characterized in that: the foam stabilizer comprises the raw materials, wherein the raw materials comprise, by mass, gram as a unit, the components and the components are silica micro powder with the particle size of 37-40 mu m, and the density of the silica micro powder is 2.2-2.66 g/cm3A discrete distribution is followed.
5. The foam discharging agent for drainage and gas production of the high-inclination horizontal well according to claim 1 is characterized in that: the liquid foam discharging agent comprises the following raw materials in percentage by mass, wherein the mass of the raw materials is in grams, and the raw materials comprise the following components in percentage by mass: 43-67% of polyoxyethylene ether sodium acetate, 6-12% of alkyl dimethyl betaine, 12-22% of ethanol, 5-10% of glycine, 0-2% of fatty acid polyoxyethylene ether, 1-5% of sodium toluenesulfonate and 2-6% of sodium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910427202.7A CN110117487B (en) | 2019-05-22 | 2019-05-22 | Foam discharging agent for drainage and gas recovery of high-inclination horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910427202.7A CN110117487B (en) | 2019-05-22 | 2019-05-22 | Foam discharging agent for drainage and gas recovery of high-inclination horizontal well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110117487A CN110117487A (en) | 2019-08-13 |
| CN110117487B true CN110117487B (en) | 2021-03-23 |
Family
ID=67523053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910427202.7A Active CN110117487B (en) | 2019-05-22 | 2019-05-22 | Foam discharging agent for drainage and gas recovery of high-inclination horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110117487B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112961659B (en) * | 2021-02-08 | 2022-07-12 | 四川圣诺油气工程技术服务有限公司 | Sinking type liquid delay foaming agent for gas production foam drainage and sand carrying |
| CN112877052B (en) * | 2021-02-08 | 2022-07-22 | 四川圣诺油气工程技术服务有限公司 | Preparation method of sinking type liquid delay foaming agent for gas production foam drainage and sand carrying |
| CN113046049B (en) * | 2021-03-29 | 2022-05-06 | 西南石油大学 | Multi-water-layer four-dispersion foam scrubbing agent for natural gas horizontal well |
| CN114933892A (en) * | 2022-05-27 | 2022-08-23 | 郑州市新郑梅久实业有限公司 | Foam discharging agent for liquid discharging and gas production of natural gas well and preparation method and application thereof |
| CN115261010B (en) * | 2022-08-09 | 2023-09-08 | 郑州市新郑梅久实业有限公司 | Petroleum fracturing cleanup additive and preparation method and application thereof |
| CN115651625A (en) * | 2022-10-08 | 2023-01-31 | 成都华阳兴华化工有限公司 | Film-coated solid foam scrubbing agent and preparation method thereof |
| CN116355607B (en) * | 2023-03-22 | 2024-03-19 | 陕西延长石油（集团）有限责任公司 | Delayed composite foaming agent for fracturing and preparation method and construction method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276934A (en) * | 1980-03-06 | 1981-07-07 | Fraser Ward M | Method and device for blocking wells to extinguish fires, prohibit saltwater intrusion, etc. |
| SU968322A1 (en) * | 1980-05-07 | 1982-10-23 | Кузнецкий Филиал Научно-Исследовательского И Проектно-Конструкторского Института По Добыче Полезных Ископаемых Открытым Способом | Apparatus for feeding foam into well |
| CN200946498Y (en) * | 2006-04-12 | 2007-09-12 | 四川石油管理局地质勘探开发研究院 | Hollow solid discharging-assistant agent |
| CN102587865A (en) * | 2012-02-29 | 2012-07-18 | 西南石油大学 | Foam drainage gas recovery method for natural gas horizontal well |
| CN203079903U (en) * | 2012-12-10 | 2013-07-24 | 中国石油天然气股份有限公司 | Self-gas generating environmental-friendly honeycomb briquette-shaped corrosion inhibiting bubble discharging rod |
| WO2014047237A1 (en) * | 2012-09-21 | 2014-03-27 | Schlumberger Canada Limited | In situ polymerization for completions sealing or repair |
| CN105525899A (en) * | 2016-01-26 | 2016-04-27 | 重庆科技学院 | Special foam drainage method for low-gas-yield water-flooded well, foam drainage agent and foam drainage device |
| CN106190080A (en) * | 2016-07-14 | 2016-12-07 | 西南石油大学 | A kind of spherical solid foam discharging agent for natural gas fluctuating horizontal well |
| CN106988713A (en) * | 2017-03-24 | 2017-07-28 | 陕西森瑞石油技术开发有限公司 | A kind of new floatability solid bubble rod row and preparation method thereof |
| CN206655684U (en) * | 2017-03-24 | 2017-11-21 | 陕西森瑞石油技术开发有限公司 | A kind of oil gas field gas production floatation type bubble rod row |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219629B (en) * | 2010-06-23 | 2021-12-03 | 伊科普罗有限责任公司 | Hydraulic fracturing |
| CN103509143B (en) * | 2012-06-27 | 2016-01-20 | 中国石油化工股份有限公司 | The preparation method of organic/inorganic composite pellets |
| US10000681B2 (en) * | 2012-12-21 | 2018-06-19 | Halliburton Energy Services, Inc. | Hollow hydrogel capsules and methods of using the same |
| CN105672970B (en) * | 2015-12-31 | 2019-04-09 | 中国石油天然气股份有限公司 | It is a kind of to realize in net horizontal section temporary stall to the method for multiple crack fracturing |
| CN106987239B (en) * | 2016-01-21 | 2022-07-15 | 中国石油化工股份有限公司 | Composite hollow microsphere and preparation method and application thereof |
| US10808162B2 (en) * | 2017-11-17 | 2020-10-20 | Fairmount Santrol Inc. | Crush resistant buoyant ball sealers |
-
2019
- 2019-05-22 CN CN201910427202.7A patent/CN110117487B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276934A (en) * | 1980-03-06 | 1981-07-07 | Fraser Ward M | Method and device for blocking wells to extinguish fires, prohibit saltwater intrusion, etc. |
| SU968322A1 (en) * | 1980-05-07 | 1982-10-23 | Кузнецкий Филиал Научно-Исследовательского И Проектно-Конструкторского Института По Добыче Полезных Ископаемых Открытым Способом | Apparatus for feeding foam into well |
| CN200946498Y (en) * | 2006-04-12 | 2007-09-12 | 四川石油管理局地质勘探开发研究院 | Hollow solid discharging-assistant agent |
| CN102587865A (en) * | 2012-02-29 | 2012-07-18 | 西南石油大学 | Foam drainage gas recovery method for natural gas horizontal well |
| WO2014047237A1 (en) * | 2012-09-21 | 2014-03-27 | Schlumberger Canada Limited | In situ polymerization for completions sealing or repair |
| CN203079903U (en) * | 2012-12-10 | 2013-07-24 | 中国石油天然气股份有限公司 | Self-gas generating environmental-friendly honeycomb briquette-shaped corrosion inhibiting bubble discharging rod |
| CN105525899A (en) * | 2016-01-26 | 2016-04-27 | 重庆科技学院 | Special foam drainage method for low-gas-yield water-flooded well, foam drainage agent and foam drainage device |
| CN106190080A (en) * | 2016-07-14 | 2016-12-07 | 西南石油大学 | A kind of spherical solid foam discharging agent for natural gas fluctuating horizontal well |
| CN106988713A (en) * | 2017-03-24 | 2017-07-28 | 陕西森瑞石油技术开发有限公司 | A kind of new floatability solid bubble rod row and preparation method thereof |
| CN206655684U (en) * | 2017-03-24 | 2017-11-21 | 陕西森瑞石油技术开发有限公司 | A kind of oil gas field gas production floatation type bubble rod row |
Non-Patent Citations (2)
| Title |
|---|
| 国内外含水气井化学排水新技术综述;李莲明;《天 然 气 技 术》;20080630;37-41 * |
| 天然气井排水采气用泡排剂的研究与应用;李智慧;《科技视界》;20150905;68-70 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110117487A (en) | 2019-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110117487B (en) | Foam discharging agent for drainage and gas recovery of high-inclination horizontal well | |
| CN102094612B (en) | Active water fracturing technology of coal-bed gas well | |
| CN102031949A (en) | Gas lift method of combined ball plug for drainage and gas production of oil and gas well | |
| CN106221687A (en) | A kind of gas field foam drainage rod and preparation method thereof | |
| CN117248857A (en) | Method for dewatering and increasing oil by filling packing body particles in oil and gas well of fractured oil and gas reservoir | |
| CN101769271B (en) | Deep-well oil-extraction external flow-channel direct and reverse circulation freely-throwing jet injector oil production method and device | |
| CN107605425A (en) | Stratum raising formation strength method is cohered in closure in coal bed gas suede capsule drilling fluid | |
| CN106894776B (en) | A kind of the coal dust carrying remove device and method of coal bed gas well sucker rod pump mining | |
| CN102747993B (en) | Liquid foaming agent injection method | |
| CN103352679B (en) | Device and method for filling foam drainage agent automatically under shaft | |
| CN106194076A (en) | A kind of ultra-deep salt mine horizontally-butted wells replaces mud and expanding method | |
| CN110964488A (en) | Cold-resistant foaming agent and application method thereof | |
| CN202338296U (en) | Built-in sieve tube of coal-bed gas well | |
| CN109025897A (en) | A kind of interior co-volume device for plugging that foams of well | |
| CN208203341U (en) | The filling drainage device of stress Fast-Balance after a kind of hydraulic flushing in hole | |
| CN209959179U (en) | Exhaust pipe column for deep pumping process | |
| CN209686507U (en) | A kind of no tower automatic water-supply vacuum tube well | |
| CN210564650U (en) | Assembled slurry storage device for filling underwater deep closed space | |
| CN209163775U (en) | A kind of interior co-volume device for plugging that foams of well | |
| CN201943750U (en) | Automatic water discharge device | |
| CN203230388U (en) | Downhole liquid release device for oil and gas fields | |
| CN113931600A (en) | Gas injection pipe column and method for reducing ground injection pressure | |
| CN105443070A (en) | Packer with gas well foam scrubbing agent filling device | |
| CN208010394U (en) | A kind of gaseous mine blowout hookup | |
| CN209354072U (en) | It is a kind of to lure the connection of stream de-plugging and oil recovery function to make tube rod column with negative pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |