CN104962263A - Middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent and water plugging method - Google Patents
Middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent and water plugging method Download PDFInfo
- Publication number
- CN104962263A CN104962263A CN201510282326.2A CN201510282326A CN104962263A CN 104962263 A CN104962263 A CN 104962263A CN 201510282326 A CN201510282326 A CN 201510282326A CN 104962263 A CN104962263 A CN 104962263A
- Authority
- CN
- China
- Prior art keywords
- oil reservoir
- plugging agent
- temporary plugging
- mid
- horizontal branch
- 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.)
- Granted
Links
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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The present invention provides a middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent and a water plugging method, wherein the middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent comprises 6-12 wt% of acrylamide, 1.5-6.4 wt% of a composite thickeners, 0.126-0.272 wt% of a composite cross-linking agent, 0.01-0.05 wt% of dimethyl 2,2'-azobis(2-methylpropionate), 0.01-0.04 wt% of ammonium persulfate, 0.01-0.08 wt% of sodium lignosulfonate, 0.01-0.05 wt% of sodium gluconate, 0.01-0.05 wt% of citric acid, 0.01-0.06 wt% of ethanedioic acid, 0.01-0.05% of triethanolamine, and the balance of water. The present invention further provides the method using the chemical packing temporary plugging agent to complete the water plugging of the middle-deep stratum oil reservoir horizontal multilateral well. With the chemical packing temporary plugging agent and the water plugging method of the present invention, the multilateral sectional water plugging of the middle-deep stratum oil reservoir screen pipe completion horizontal multilateral well is achieved, and the difficult problem of the screen pipe completion horizontal multilateral well sectional water plugging is solved.
Description
Technical field
The present invention relates to a kind of temporary plugging agent and shutoff method, particularly a kind of chemical packing temporary plugging agent of mid-deep strata oil reservoir horizontal branch well and shutoff method, belong to technical field of petroleum extraction.
Background technology
Horizontal branch well technology is the important technical improving oil recovery, increase crude production rate.Horizontal branch well compares conventional levels well tools longer horizontal hole, drainage area can be expanded to greatest extent, improve oil reservoir vertical producing degree thus improve oil flow state section, horizontal branch well can realize few well fecund, and reduce drilling cost, increase economic efficiency, obtained paying attention to more and more widely and applying in oil-field development.
By the impact of the factor such as cost of investment and technology, horizontal branch well completion mainly adopts the outer cutting seam sieve tube completion mode without pkr of pipe, and owing to not having barrier between cutting seam sieve tube and rock wall, cutting seam sieve tube horizontal branch well water blockoff difficulty is maximum.At present, cutting seam sieve tube horizontal branch well mainly adopts the horizontal branch well water-plugging technology that in fluid by outside-tube chemical water blockoff, pipe, water pack off combines, and solves horizontal branch well to a certain extent and goes out water problem.
But in mid-deep strata oil reservoir horizontal branch well plug water construction, due to temperature higher time, there are some problems in mechanical packing intensity and working security etc. in the water-plugging technology of above-mentioned horizontal branch well, cause water plugging effect undesirable in fluid by outside-tube chemical packing stopping property, pipe.
Therefore, mid-deep strata oil reservoir horizontal branch well water detection, control water and water blockoff problem have become the difficult problem urgently broken through this area.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the present invention is to provide a kind of chemical packing temporary plugging agent of mid-deep strata oil reservoir horizontal branch well water blockoff and adopt its shutoff method, achieve the branch segment water blockoff of the horizontal branch well of mid-deep strata oil reservoir sieve tube completion, solve a difficult problem for the horizontal branch well segmentation water blockoff of sieve tube completion.
In order to achieve the above object, the invention provides a kind of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, in this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount for 100wt%, this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent comprises: the acrylamide of 6-12wt%, the complex thickener of 1.5-6.4wt%, the multiple crosslinking agent of 0.126-0.272wt%, the azo-bis-iso-dimethyl of 0.01-0.05wt%, the ammonium persulphate of 0.01-0.04wt%, the sodium lignosulfonate of 0.01-0.08wt%, the Sunmorl N 60S of 0.01-0.05wt%, the citric acid of 0.01-0.05wt%, the oxalic acid of 0.01-0.06wt%, the trolamine of 0.01-0.05% and the water of surplus.
In mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention, preferably, in this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount for 100wt%, this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent comprises: the acrylamide of 8-10wt%, the complex thickener of 2.9-5.2wt%, the multiple crosslinking agent of 0.168-0.21wt%, the azo-bis-iso-dimethyl of 0.02-0.04wt%, the ammonium persulphate of 0.02-0.03wt%, the sodium lignosulfonate of 0.03-0.06wt%, the Sunmorl N 60S of 0.02-0.04wt%, the citric acid of 0.02-0.03wt%, the oxalic acid of 0.03-0.05wt%, the trolamine of 0.02-0.04% and the water of surplus.
In mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention, preferably, the complex thickener of employing comprises the combination of one or more in polyacrylamide, polyvinyl alcohol, Natvosol, Vltra tears, hydroxypropyl guar rubber powder, starch, sodium bentonite and organobentonite.
In mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention, preferably, the complex thickener adopted comprises polyacrylamide, hydroxypropyl guar rubber powder and sodium bentonite, and described polyacrylamide, hydroxypropyl guar rubber powder and sodium bentonite account for 0.1-0.5wt%, 0.4-0.9wt% and 1-5wt% of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively; More preferably, polyacrylamide, hydroxypropyl guar rubber powder and sodium bentonite account for 0.3-0.4wt%, 0.6-0.8wt% and 2-4wt% of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively.
In the present invention, the apparent viscosity >=70mpa.s under the hydroxypropyl guar rubber powder normal temperature of employing.
In mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention, preferably, the multiple crosslinking agent adopted comprises the combination of one or more in N,N methylene bis acrylamide, Vinylstyrene, vulcabond, vinylformic acid, Hydroxyethyl acrylate, urotropine, paraformaldehyde, Resorcinol, Resorcinol, borax, organic zirconate and organic titanic compound; More preferably, organic titanic compound comprises tetrabutyl titanate.。
In mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention, preferably, the multiple crosslinking agent adopted comprises N, N-methylene-bisacrylamide, urotropine, Resorcinol and organic titanic compound, described N,N methylene bis acrylamide, urotropine, Resorcinol and organic titanic compound account for 0.03-0.08wt%, 0.05-0.1wt%, 0.006-0.012wt% and 0.04-0.08wt% of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively, more preferably, the N,N methylene bis acrylamide of employing, urotropine, Resorcinol and organic titanic compound account for the 0.05-0.06wt% of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively, 0.06-0.08wt%, 0.008-0.01wt% and 0.05-0.06wt% provides a kind of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, in this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount for 100wt%, this chemical packing temporary plugging agent comprises: the acrylamide of 8-10wt%, the polyacrylamide of 0.3-0.4wt%, the hydroxypropyl guar rubber powder of 0.6-0.8wt%, the sodium bentonite of 2-4wt%, the N,N methylene bis acrylamide of 0.05-0.06wt%, the urotropine of 0.06-0.08wt%, the Resorcinol of 0.008-0.01wt%, the organic titanic compound of 0.05-0.06wt%, the azo-bis-iso-dimethyl of 0.02-0.04wt%, the ammonium persulphate of 0.02-0.03wt%, the sodium lignosulfonate of 0.03-0.06wt%, the Sunmorl N 60S of 0.02-0.04wt%, the citric acid of 0.02-0.03wt%, the oxalic acid of 0.03-0.05wt%, the trolamine of 0.02-0.04% and the water of surplus.
Mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention is low-viscosity (mobile) liquid at normal temperatures, and stationary phase is at more than 24h.Under certain temperature and linking agent effect, the frozen glue body with higher-strength and bearing capacity can be cross-linked in 3-10h, realize stifled and packing effect temporarily.And the method for being rinsed by heating (temperature > 150 DEG C) or machinery can make its fragmentation of degrading, and removes packing.
Mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention is prepared by following steps:
Under normal temperature, complex thickener is mixed with water, add host (acrylamide), after solution mixes, add multiple crosslinking agent, add azo-bis-iso-dimethyl, ammonium persulphate, sodium lignosulfonate, Sunmorl N 60S, citric acid, oxalic acid and trolamine successively after stirring 10-15min, obtain the mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent with certain viscosity.
Present invention also offers a kind of shutoff method utilizing above-mentioned mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent to complete, the method comprises the following steps:
Step one: utilize mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent to carry out packing to horizontal branch well branch, after packing, another branch of described horizontal branch well is produced;
Step 2: if the horizontal section carrying out the branch produced yields poorly, moisture height, then carry out segmentation water blockoff to this branch;
If the water outlet carrying out the branch of packing is serious, then removes the packing of this branch, segmentation water blockoff is carried out to this branch, complete the water blockoff of centering Deep Reservoirs horizontal branch well.
In aforesaid method of the present invention, in step 2, the horizontal section carrying out the branch produced yields poorly, the water outlet of moisture height and branch serious in yield poorly, moisture height and water outlet be seriously that those skilled in the art can determine.
In shutoff method provided by the invention, preferably, the method comprises the following steps:
To arrive in the well of a branch of horizontal branch well under tubing string, adopt and just inject described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent for Recycle design, grow into the colloid of 100-150m Reasonable Well section shape, after waiting solidifying 12h, another branch of horizontal branch well is produced;
If the horizontal section carrying out the branch produced yields poorly, moisture height, then carry out segmentation water blockoff to this branch, and remove the packing of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, completes the water blockoff of centering Deep Reservoirs horizontal branch well;
If the water outlet carrying out the branch of packing is serious, then removes the packing of this branch, segmentation water blockoff is carried out to this branch, complete the water blockoff of centering Deep Reservoirs horizontal branch well;
Wherein, segmentation water blockoff specifically comprises the following steps:
Described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is injected, fullness level section pit shaft to needing the horizontal section of the branch carrying out segmentation water blockoff; With mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent described in displacing liquid displacement; Time is congealed into glue; Displacing liquid breaks glue, injects high temperature resistant plugging agent, completes segmentation water blockoff.
In the method for the invention, mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is utilized to grow into the colloid of 100-150m Reasonable Well section shape, the Reasonable Well section selected should first at son field, Reasonable Well pars infrasegmentalis is generally in sleeve position, and the short Reasonable Well pars infrasegmentalis of son field is in light pipe and sleeve position.According to the specific embodiment of the present invention; shutoff method of the present invention utilizes the packing of mid-deep strata oil reservoir horizontal branch well provided by the invention chemistry packing temporary plugging agent, temporarily stifled, effect to oil layer protection; by the segmentation again of the first branch of horizontal branch well; carry out pilot production and find out water outlet position; then high temperature resistant plugging agent is injected to water production interval; complete water blockoff step, to comprise the horizontal branch well of spoke 1 and spoke 2, above-mentioned shutoff method specifically comprises the following steps:
First will arrive in branch 1 well under tubing string, then sleeve gate is opened, adopt and just inject mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent for Recycle design, grow into the colloid of 100-150m Reasonable Well section shape, make mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent returns predetermined position;
After having noted mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, upper lifting pipe post is to certain distance immediately, and after waiting solidifying 12h, former tubing string returns spy, if tubing string suspending weight reduces 1-2t, then stops transferring tubing string and is chemical temporary blocking agent plug packing face; Visit extremely bottom, chemical packing temporary plugging agent predetermined position 150-250m tubing string suspending weight, still without considerable change then to need to redefine lower step arrangement and method for construction as returned.After upper lifting pipe post to design attitude, branch 2 is produced;
If branch 2 lateral segment yields poorly, High water cut, segmentation water blockoff is carried out to it, and remove the packing of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, segmentation water blockoff first injects a certain amount of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent to horizontal branch well branch 2 horizontal section, fullness level section pit shaft; Then, with displacing liquid displacement mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, protected water blockoff destination layer position, mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent waits the glue that congeals into; Subsequently, displacing liquid breaks glue, and water blockoff target well section is come out; Finally, inject high temperature resistant plugging agent, high temperature resistant plugging agent salt resis to the target well section come out, mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent breaks glue, completes the water blockoff of centering Deep Reservoirs horizontal branch well;
If branch 2 lateral segment output is high, water content declines obviously, illustrates that the water outlet of branch 1 is serious, then remove the packing of branch 1, carry out segmentation water blockoff to branch 1, segmentation water blockoff is identical with the segmentation water blockoff step of branch 2, completes the water blockoff of centering Deep Reservoirs horizontal branch well.
Shutoff method provided by the invention can realize any branch, segmentation position in horizontal branch well and carry out water blockoff, is applicable to the horizontal branch well branch segment water blockoff of sieve tube completion.
Mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent of the present invention and shutoff method have the following advantages:
Temporary plugging agent provided by the invention and shutoff method are not only applicable to mid-deep strata heavy crude reservoir, adapt to and mid-deep strata ligh-oil reservoir yet;
Mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent provided by the invention is low-viscosity (mobile) liquid at normal temperatures, and stationary phase is at more than 24h.Under certain temperature and linking agent effect, the frozen glue body with higher-strength and bearing capacity can be cross-linked in 3-10h, realize stifled and packing effect temporarily, and its fragmentation of degrading can be made by the method that heating (temperature > 150 DEG C) or machinery rinse, remove packing;
In addition, utilize the shutoff method of above-mentioned chemical packing temporary plugging agent, achieve in the horizontal branch well branch water blockoff of mid-deep strata oil reservoir sieve tube completion and branch levels section pipe, tube exterior subsection water blockoff; Utilize the stifled temporarily performance of chemical packing temporary plugging agent, in water blockoff process, achieve oil layer protection, greatly reduce construction risk and cost.
Accompanying drawing explanation
Fig. 1 is the former well flow string schematic diagram of embodiment 5;
Fig. 2 is the well casing post schematic diagram of the Zan Du branch 1 of embodiment 5;
Fig. 3 is the well casing post schematic diagram of the Zan Du branch 2 of embodiment 5.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, existing following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
Embodiment 1
Present embodiments provide a kind of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, this packing temporary plugging agent comprises: the acrylamide of 8 weight parts, the polyacrylamide of 0.3 weight part, the hydroxypropyl guar rubber powder of 0.6 weight part, the sodium bentonite of 2 weight parts, the N of 0.05 weight part, N-methylene-bisacrylamide, the urotropine of 0.06 weight part, the Resorcinol of 0.008 weight part, the tetrabutyl titanate of 0.05 weight part, the azo-bis-iso-dimethyl of 0.02 weight part, the ammonium persulphate of 0.02 weight part, the sodium lignosulfonate of 0.03 weight part, the Sunmorl N 60S of 0.02 weight part, the citric acid of 0.03 weight part, the oxalic acid of 0.03 weight part, the trolamine of 0.02 weight part and the water of surplus.
Above-mentioned mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is prepared by following steps: under normal temperature, polyacrylamide, sodium bentonite, hydroxypropyl guar rubber powder and deionized water are joined 10m successively
3in stirred pot, acrylamide is added after stirring 10-15min, after solution mixes, add N successively, N-methylene-bisacrylamide, urotropine, Resorcinol, tetrabutyl titanate, add azo-bis-iso-dimethyl, ammonium persulphate, sodium lignosulfonate, Sunmorl N 60S, citric acid, oxalic acid and trolamine successively after stirring 10-15min, obtain the chemical packing temporary plugging agent aaerosol solution with certain viscosity.
Embodiment 2
Present embodiments provide a kind of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, this packing temporary plugging agent comprises: the acrylamide of 9 weight parts, the polyacrylamide of 0.3 weight part, the hydroxypropyl guar rubber powder of 0.7 weight part, the sodium bentonite of 3 weight parts, the N of 0.05 weight part, N-methylene-bisacrylamide, the urotropine of 0.07 weight part, the Resorcinol of 0.008 weight part, the tetrabutyl titanate of 0.05 weight part, the azo-bis-iso-dimethyl of 0.03 weight part, the ammonium persulphate of 0.02 weight part, the sodium lignosulfonate of 0.04 weight part, the Sunmorl N 60S of 0.03 weight part, the citric acid of 0.03 weight part, the oxalic acid of 0.04 weight part, the trolamine of 0.03 weight part and the water of surplus.
Above-mentioned mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is prepared by following steps: under normal temperature, polyacrylamide, sodium bentonite, hydroxypropyl guar rubber powder and deionized water are joined 10m successively
3in stirred pot, acrylamide is added after stirring 10-15min, after solution mixes, add N successively, N-methylene-bisacrylamide, urotropine, Resorcinol, tetrabutyl titanate, add azo-bis-iso-dimethyl, ammonium persulphate, sodium lignosulfonate, Sunmorl N 60S, citric acid, oxalic acid and trolamine successively after stirring 10-15min, obtain the chemical packing temporary plugging agent aaerosol solution with certain viscosity.
Embodiment 3
Present embodiments provide a kind of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, this packing temporary plugging agent comprises: the acrylamide of 10 weight parts, the polyacrylamide of 0.4 weight part, the hydroxypropyl guar rubber powder of 0.7 weight part, the sodium bentonite of 3 weight parts, the N of 0.06 weight part, N-methylene-bisacrylamide, the urotropine of 0.078 weight part, the Resorcinol of 0.009 weight part, the tetrabutyl titanate of 0.06 weight part, the azo-bis-iso-dimethyl of 0.03 weight part, the ammonium persulphate of 0.03 weight part, the sodium lignosulfonate of 0.05 weight part, the Sunmorl N 60S of 0.04 weight part, the citric acid of 0.03 weight part, the oxalic acid of 0.05 weight part, the trolamine of 0.03 weight part and the water of surplus.
Above-mentioned mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is prepared by following steps: under normal temperature, polyacrylamide, sodium bentonite, hydroxypropyl guar rubber powder and deionized water are joined 10m successively
3in stirred pot, acrylamide is added after stirring 10-15min, after solution mixes, add N successively, N-methylene-bisacrylamide, urotropine, Resorcinol, tetrabutyl titanate, add azo-bis-iso-dimethyl, ammonium persulphate, sodium lignosulfonate, Sunmorl N 60S, citric acid, oxalic acid and trolamine successively after stirring 10-15min, obtain the chemical packing temporary plugging agent aaerosol solution with certain viscosity.
Embodiment 4
Present embodiments provide a kind of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, this packing temporary plugging agent comprises: the acrylamide of 10 weight parts, the polyacrylamide of 0.4 weight part, the hydroxypropyl guar rubber powder of 0.8 weight part, the sodium bentonite of 4 weight parts, the N of 0.06 weight part, N-methylene-bisacrylamide, the urotropine of 0.08 weight part, the Resorcinol of 0.01 weight part, the tetrabutyl titanate of 0.06 weight part, the azo-bis-iso-dimethyl of 0.04 weight part, the ammonium persulphate of 0.03 weight part, the sodium lignosulfonate of 0.06 weight part, the Sunmorl N 60S of 0.04 weight part, the citric acid of 0.03 weight part, the oxalic acid of 0.05 weight part, the trolamine of 0.04 weight part and the water of surplus.
Above-mentioned mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is prepared by following steps: under normal temperature, polyacrylamide, sodium bentonite, hydroxypropyl guar rubber powder and deionized water are joined 10m successively
3in stirred pot, acrylamide is added after stirring 10-15min, after solution mixes, add N successively, N-methylene-bisacrylamide, urotropine, Resorcinol, tetrabutyl titanate, add azo-bis-iso-dimethyl, ammonium persulphate, sodium lignosulfonate, Sunmorl N 60S, citric acid, oxalic acid and trolamine successively after stirring 10-15min, obtain the chemical packing temporary plugging agent aaerosol solution with certain viscosity.
Embodiment 5
Present embodiments provide a kind of shutoff method utilizing the mid-deep strata oil reservoir horizontal branch well of embodiment 1 chemistry packing temporary plugging agent to complete, the horizontal branch well of the present embodiment is owing to yielding poorly, Ni Zandu branch 1, output is asked to branch 2, then Zan Du branch 2, ask output to branch 1, and survey the reservoir pressure of branch 1, branch 2, concrete sequencing can adjust according to on-site actual situations.
Before construction, prepare high temp profile control agent 9t, be mixed with pre-blocking agent 60m
3; Prepare the chemical packing temporary plugging agent 9m of embodiment 1
3, and deliver to working-yard; On-the-spot dosing equipment (4m is provided
31, tank) and deliver to working-yard; With job mix, and remove construction (gaslift) tubing string by design requirements; Clear water 90m needed for site operation is provided
3, coordinate construction pump truck 1,1, anti-pollution tank car.
This shutoff method comprises the following steps:
One, Zan Du branch 1, comprises following concrete steps to the technique that branch 2 carries out gaslift production:
1, the consumption of calculational chemistry packing temporary plugging agent
The oil subsidy of former well flow string is apart from being 3.80m, overlapping and mend apart from being 4.12m, and as shown in Figure 1, packing well section is empty well cylinder, and specification is Φ 244.5mm, and internal volume is 40m
3/ km.Estimate that packing well segment length is 120m (tubing string returns to visit and damages partial chemical packing temporary plugging agent, stays 20m surplus more), therefore chemical packing temporary plugging agent design flow is 4.8m
3, consider the loss in transport and injection process, therefore chemical packing temporary plugging agent 6m need be prepared
3.
2, horizontal branch well branch 1 stifled construction temporarily
First, by under tubing string to branch 1 well in 2700m place, as shown in Figure 2, then open sleeve gate, pump truck according to just squeeze mode connect well head, sleeve gate takes over control pollution tank car, closedown sleeve gate, with 30m
3the discharge capacity of/h just squeezes pre-blocking agent 30m
3, squeeze pressure reaches 10MPa, then open sleeve gate, with 30m
3the discharge capacity of/h just replaces remaining pre-blocking agent, with 60m
3the discharge capacity positive alternative packing temporary plugging agent 6m of/h
3; With 60m
3the discharge capacity of/h is just for clear water 8.3m
3; Form in the 2600-2700m well section of branch 1 elastic gel that long 100m has some strength, make chemical packing temporary plugging agent return 2600m from 2700m, packing is formed to branch 1; After having noted chemical packing temporary plugging agent, upper lifting pipe post is to 2450m immediately, and upward strain speed requires to be not less than 10m/min; Install former well head, after waiting solidifying 12h, former tubing string returns spy, if suspending weight reduces 1-2t than normal value, then stops transferring tubing string, above carries to gas lift string design attitude; As return visit to 2896m tubing string suspending weight still without considerable change, then need to redefine lower step arrangement and method for construction.
3, because branch 2 water outlet is serious, segmentation water blockoff is carried out to branch 2
First inject chemical packing temporary plugging agent to horizontal branch well branch 2 horizontal section, make its fullness level section pit shaft; With displacing liquid displacement chemistry packing temporary plugging agent, water blockoff destination layer position is protected; Chemistry packing temporary plugging agent waits the glue that congeals into; Displacing liquid breaks glue, and water blockoff target well section is come out; High temperature resistant chemical water shutoff agent is injected to the target well section come out; High temperature resistant chemical water shutoff agent salt resis, chemical packing is the broken glue of stifled meter temporarily, completes whole plug water construction process.
Two, 2 pairs of branches of Zan Du branch 1 carry out gaslift production technique and comprise following concrete steps:
1, the consumption of calculational chemistry packing temporary plugging agent
Packing well section is empty well cylinder, and specification is Φ 177.8mm, and internal volume is 20m
3/ km, lower semisection specification is Φ 127.0mm, and internal volume is 10m
3/ km.Estimate that packing well segment length is 120m (tubing string returns to visit and damages partial chemical packing temporary plugging agent, stays 20m surplus more), packing well section comprises Φ 177.8mm × 70m+ Φ 127.0mm × 50m, and therefore chemical packing temporary plugging agent design flow is 1.9m
3, consider the loss in transport and injection process, therefore chemical packing temporary plugging agent 3m need be prepared
3.
2, horizontal branch well branch 2 carries out stifled construction temporarily
First, by under tubing string to branch 2 well in 2650m place, as shown in Figure 3, then open sleeve gate, pump truck according to just squeeze mode connect well head, sleeve gate takes over control pollution tank car, closedown sleeve gate, with 30m
3the discharge capacity of/h just squeezes pre-blocking agent 30m
3, squeeze pressure reaches 10MPa, then open sleeve gate, with 30m
3the discharge capacity of/h just replaces remaining pre-blocking agent, with 60m
3the discharge capacity positive alternative packing temporary plugging agent 3m of/h
3; With 60m
3the discharge capacity of/h is just for clear water 8.1m
3; Form in the 2550-2650m well section of branch 2 elastic gel that long 100m has some strength, make chemical packing temporary plugging agent return 2550m from 2650m, packing is formed to branch 2; After having noted chemical packing temporary plugging agent, upper lifting pipe post is to 2430m immediately, and upward strain speed requires to be not less than 10m/min; Install former well head, after waiting solidifying 12h, former tubing string returns spy, if suspending weight reduces 1-2t than normal value, then stops transferring tubing string, above carries to gas lift string design attitude; As return visit to 2898m tubing string suspending weight still without considerable change, then need to redefine lower step arrangement and method for construction.
3, because branch 1 water outlet is serious, segmentation water blockoff is carried out to branch 1
First inject chemical packing temporary plugging agent to horizontal branch well branch 1 horizontal section, make its fullness level section pit shaft; With displacing liquid displacement chemistry packing temporary plugging agent, water blockoff zone of interest position is protected; Chemistry packing temporary plugging agent waits the glue that congeals into; Displacing liquid breaks glue, and water blockoff object well section is come out; High temperature resistant chemical water shutoff agent is injected to the object well section come out; High temperature resistant chemical water shutoff agent salt resis, chemical packing is the broken glue of stifled meter temporarily, completes whole plug water construction process.
The water plugging effect of the water blockoff utilizing above-mentioned chemical packing temporary plugging agent to carry out:
Chemical packing temporary plugging agent prepared by embodiment 1 uses at certain oil field A well, adopt the shutoff method in embodiment 5, before this well measure moisture 95%, day produce oil 0.05t, 1 pair of branch of Zan Du branch 2 carries out gaslift production, after measure moisture 98%, day produce oil 0.01t, illustrate that branch 2 water outlet is serious, segmentation water blockoff is carried out to branch 2, after completing whole plug water construction process, the method adopting machinery to rinse makes branch 1 degrade fragmentation, remove packing, gaslift production is carried out to branch 1, at present moisture 84%, day produce oil 0.35t, the oily 686.5t of stage accumulative increasing, water plugging effect is better.
Claims (8)
1. a mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, in this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount for 100wt%, this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent comprises: the acrylamide of 6-12wt%, the complex thickener of 1.5-6.4wt%, the multiple crosslinking agent of 0.126-0.272wt%, the azo-bis-iso-dimethyl of 0.01-0.05wt%, the ammonium persulphate of 0.01-0.04wt%, the sodium lignosulfonate of 0.01-0.08wt%, the Sunmorl N 60S of 0.01-0.05wt%, the citric acid of 0.01-0.05wt%, the oxalic acid of 0.01-0.06wt%, the trolamine of 0.01-0.05% and the water of surplus.
2. mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent according to claim 1, wherein, in this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount for 100wt%, this mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent comprises: the acrylamide of 8-10wt%, the complex thickener of 2.9-5.2wt%, the multiple crosslinking agent of 0.168-0.21wt%, the azo-bis-iso-dimethyl of 0.02-0.04wt%, the ammonium persulphate of 0.02-0.03wt%, the sodium lignosulfonate of 0.03-0.06wt%, the Sunmorl N 60S of 0.02-0.04wt%, the citric acid of 0.02-0.03wt%, the oxalic acid of 0.03-0.05wt%, the trolamine of 0.02-0.04% and the water of surplus.
3. mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent according to claim 1 and 2, wherein, described complex thickener comprises the combination of one or more in polyacrylamide, polyvinyl alcohol, Natvosol, Vltra tears, hydroxypropyl guar rubber powder, starch, sodium bentonite and organobentonite.
4. mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent according to claim 3, wherein, described complex thickener comprises polyacrylamide, hydroxypropyl guar rubber powder and sodium bentonite, and described polyacrylamide, hydroxypropyl guar rubber powder and sodium bentonite account for 0.1-0.5wt%, 0.4-0.9wt% and 1-5wt% of described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively; Preferably, described polyacrylamide, hydroxypropyl guar rubber powder and sodium bentonite account for 0.3-0.4wt%, 0.6-0.8wt% and 2-4wt% of described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively.
5. mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent according to claim 1 and 2, wherein, described multiple crosslinking agent comprises the combination of one or more in N,N methylene bis acrylamide, Vinylstyrene, vulcabond, vinylformic acid, Hydroxyethyl acrylate, urotropine, paraformaldehyde, Resorcinol, Resorcinol, borax, organic zirconate and organic titanic compound; Preferably, organic titanic compound comprises tetrabutyl titanate.
6. mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent according to claim 5, wherein, described multiple crosslinking agent comprises N, N-methylene-bisacrylamide, urotropine, Resorcinol and organic titanic compound, described N,N methylene bis acrylamide, urotropine, Resorcinol and organic titanic compound account for 0.03-0.08wt%, 0.05-0.1wt%, 0.006-0.012wt% and 0.04-0.08wt% of described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively; Preferably, described N,N methylene bis acrylamide, urotropine, Resorcinol and organic titanic compound account for 0.05-0.06wt%, 0.06-0.08wt%, 0.008-0.01wt% and 0.05-0.06wt% of described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent total amount respectively.
7. utilize the shutoff method that the chemistry of the mid-deep strata oil reservoir horizontal branch well described in any one of claim 1-6 packing temporary plugging agent completes, the method comprises the following steps:
Step one: the mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent described in utilization carries out packing to horizontal branch well branch, after packing, produces another branch of described horizontal branch well;
Step 2: if the horizontal section carrying out the branch produced yields poorly, moisture height, then carry out segmentation water blockoff to this branch;
If the water outlet carrying out the branch of packing is serious, then removes the packing of this branch, segmentation water blockoff is carried out to this branch, complete the water blockoff of centering Deep Reservoirs horizontal branch well.
8. shutoff method according to claim 7, wherein, the method specifically comprises the following steps:
To arrive in the well of a branch of horizontal branch well under tubing string, adopt and just inject described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent for Recycle design, grow into the colloid of 100-150m Reasonable Well section shape, after waiting solidifying 12h, another branch of horizontal branch well is produced;
If the horizontal section carrying out the branch produced yields poorly, moisture height, then carry out segmentation water blockoff to this branch, and remove the packing of mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent, completes the water blockoff of centering Deep Reservoirs horizontal branch well;
If the water outlet carrying out the branch of packing is serious, then removes the packing of this branch, segmentation water blockoff is carried out to this branch, complete the water blockoff of centering Deep Reservoirs horizontal branch well;
Wherein, described segmentation water blockoff comprises the following steps:
Described mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent is injected, fullness level section pit shaft to needing the horizontal section of the branch carrying out segmentation water blockoff; With mid-deep strata oil reservoir horizontal branch well chemistry packing temporary plugging agent described in displacing liquid displacement; Time is congealed into glue; Displacing liquid breaks glue, injects high temperature resistant plugging agent, completes segmentation water blockoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282326.2A CN104962263B (en) | 2015-05-28 | 2015-05-28 | Mid-deep strata oil reservoir horizontal branch well chemistry packing diverting agent and shutoff method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282326.2A CN104962263B (en) | 2015-05-28 | 2015-05-28 | Mid-deep strata oil reservoir horizontal branch well chemistry packing diverting agent and shutoff method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104962263A true CN104962263A (en) | 2015-10-07 |
| CN104962263B CN104962263B (en) | 2018-01-05 |
Family
ID=54216364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510282326.2A Active CN104962263B (en) | 2015-05-28 | 2015-05-28 | Mid-deep strata oil reservoir horizontal branch well chemistry packing diverting agent and shutoff method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104962263B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525890A (en) * | 2015-11-24 | 2016-04-27 | 中国石油化工股份有限公司 | Water plugging method used for screen pipe completion horizontal well |
| CN105863557A (en) * | 2016-04-28 | 2016-08-17 | 重庆科技学院 | Three-dimensional deep-formation compound sand control method for oil and gas well |
| CN106520096A (en) * | 2016-10-28 | 2017-03-22 | 西南石油大学 | A well killing fluid, a preparing method thereof and applications of the well killing fluid |
| CN106749885A (en) * | 2015-11-19 | 2017-05-31 | 北京熠海能源科技有限公司 | A kind of preparation method and applications of nano-micro level water-in-water type microballoon profile control agent |
| CN108276982A (en) * | 2018-03-22 | 2018-07-13 | 昆山京昆油田化学科技开发公司 | A kind of organic titanium cross-linking agent and its preparation method and application |
| WO2019090507A1 (en) * | 2017-11-08 | 2019-05-16 | 苏州荣能环保科技有限公司 | Underfloor heating pipeline cleaning liquid |
| CN110105940A (en) * | 2019-06-17 | 2019-08-09 | 黑龙江勇峰化工添加剂有限公司 | A kind of oilfield chemistry oil recovery multiple copolymer elastic granule profile control agent |
| CN110885671A (en) * | 2019-08-08 | 2020-03-17 | 北京九恒质信能源技术有限公司 | Fracturing diverting agent and preparation method thereof |
| CN111286311A (en) * | 2020-03-03 | 2020-06-16 | 中国石油天然气股份有限公司 | Multiple cross-linking type polymer gel profile control agent and application thereof |
| CN111334886A (en) * | 2020-04-16 | 2020-06-26 | 陕西科技大学 | Temporary plugging agent for oil well prepared from covalent bond crosslinked polyvinyl alcohol landfill initiator and preparation method thereof |
| CN114479802A (en) * | 2020-11-13 | 2022-05-13 | 中国石油天然气股份有限公司 | Temperature-resistant gel plugging modifier and preparation method and application thereof |
| CN114479803A (en) * | 2020-11-13 | 2022-05-13 | 中国石油天然气股份有限公司 | High-temperature profile control agent and preparation method and application thereof |
| CN115704287A (en) * | 2021-08-13 | 2023-02-17 | 中国石油天然气股份有限公司 | Chemical temporary plugging shielding well repairing method for thickened oil thermal recovery well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172890A (en) * | 1997-08-27 | 1998-02-11 | 辽河石油勘探局钻采工艺研究院 | Preparing and use of liquid bridging plug |
| CN1204677A (en) * | 1998-06-05 | 1999-01-13 | 中国科学院广州化学研究所 | Manufacturing method for oil deposit water-stop gelatinizing liquid |
| CN102191023A (en) * | 2010-03-19 | 2011-09-21 | 中国石油天然气股份有限公司 | Temporary plugging agent for medium/high-temperature oil-gas reservoir |
| US20110237468A1 (en) * | 2008-12-18 | 2011-09-29 | Roland Reichenbach-Klinke | Methods for blocking underground formations |
| CN103374342A (en) * | 2012-04-17 | 2013-10-30 | 中国石油化工股份有限公司 | Profile control and water plugging agent and method for oil field |
| CN104403053A (en) * | 2014-11-14 | 2015-03-11 | 天津大港油田滨港集团博弘石油化工有限公司 | Polymer water-plugging precrosslinked oil displacement profile control agent for oil recovery and preparation method thereof |
| CN104531115A (en) * | 2014-12-30 | 2015-04-22 | 中国石油天然气股份有限公司 | Temporary plugging agent for horizontal well water control, and preparation method and application thereof |
-
2015
- 2015-05-28 CN CN201510282326.2A patent/CN104962263B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172890A (en) * | 1997-08-27 | 1998-02-11 | 辽河石油勘探局钻采工艺研究院 | Preparing and use of liquid bridging plug |
| CN1204677A (en) * | 1998-06-05 | 1999-01-13 | 中国科学院广州化学研究所 | Manufacturing method for oil deposit water-stop gelatinizing liquid |
| US20110237468A1 (en) * | 2008-12-18 | 2011-09-29 | Roland Reichenbach-Klinke | Methods for blocking underground formations |
| CN102191023A (en) * | 2010-03-19 | 2011-09-21 | 中国石油天然气股份有限公司 | Temporary plugging agent for medium/high-temperature oil-gas reservoir |
| CN103374342A (en) * | 2012-04-17 | 2013-10-30 | 中国石油化工股份有限公司 | Profile control and water plugging agent and method for oil field |
| CN104403053A (en) * | 2014-11-14 | 2015-03-11 | 天津大港油田滨港集团博弘石油化工有限公司 | Polymer water-plugging precrosslinked oil displacement profile control agent for oil recovery and preparation method thereof |
| CN104531115A (en) * | 2014-12-30 | 2015-04-22 | 中国石油天然气股份有限公司 | Temporary plugging agent for horizontal well water control, and preparation method and application thereof |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106749885A (en) * | 2015-11-19 | 2017-05-31 | 北京熠海能源科技有限公司 | A kind of preparation method and applications of nano-micro level water-in-water type microballoon profile control agent |
| CN105525890B (en) * | 2015-11-24 | 2019-01-08 | 中国石油化工股份有限公司 | Method for sieve tube completion water plugging of horizontal well |
| CN105525890A (en) * | 2015-11-24 | 2016-04-27 | 中国石油化工股份有限公司 | Water plugging method used for screen pipe completion horizontal well |
| CN105863557A (en) * | 2016-04-28 | 2016-08-17 | 重庆科技学院 | Three-dimensional deep-formation compound sand control method for oil and gas well |
| CN105863557B (en) * | 2016-04-28 | 2019-04-16 | 重庆科技学院 | Oil/gas well solid deep layer composite sand prevention method |
| CN106520096A (en) * | 2016-10-28 | 2017-03-22 | 西南石油大学 | A well killing fluid, a preparing method thereof and applications of the well killing fluid |
| CN106520096B (en) * | 2016-10-28 | 2019-10-08 | 西南石油大学 | A kind of well killing fluid and preparation method thereof, application |
| WO2019090507A1 (en) * | 2017-11-08 | 2019-05-16 | 苏州荣能环保科技有限公司 | Underfloor heating pipeline cleaning liquid |
| CN108276982A (en) * | 2018-03-22 | 2018-07-13 | 昆山京昆油田化学科技开发公司 | A kind of organic titanium cross-linking agent and its preparation method and application |
| CN110105940B (en) * | 2019-06-17 | 2020-07-03 | 黑龙江勇峰化工添加剂有限公司 | Multicomponent copolymer elastic particle profile control agent for oil field chemical oil extraction |
| CN110105940A (en) * | 2019-06-17 | 2019-08-09 | 黑龙江勇峰化工添加剂有限公司 | A kind of oilfield chemistry oil recovery multiple copolymer elastic granule profile control agent |
| CN110885671A (en) * | 2019-08-08 | 2020-03-17 | 北京九恒质信能源技术有限公司 | Fracturing diverting agent and preparation method thereof |
| CN111286311A (en) * | 2020-03-03 | 2020-06-16 | 中国石油天然气股份有限公司 | Multiple cross-linking type polymer gel profile control agent and application thereof |
| CN111334886A (en) * | 2020-04-16 | 2020-06-26 | 陕西科技大学 | Temporary plugging agent for oil well prepared from covalent bond crosslinked polyvinyl alcohol landfill initiator and preparation method thereof |
| CN111334886B (en) * | 2020-04-16 | 2022-06-28 | 陕西中康能源技术有限公司 | Temporary plugging agent for oil well prepared from covalent bond crosslinked polyvinyl alcohol landfill initiator and preparation method thereof |
| CN114479802A (en) * | 2020-11-13 | 2022-05-13 | 中国石油天然气股份有限公司 | Temperature-resistant gel plugging modifier and preparation method and application thereof |
| CN114479803A (en) * | 2020-11-13 | 2022-05-13 | 中国石油天然气股份有限公司 | High-temperature profile control agent and preparation method and application thereof |
| CN114479803B (en) * | 2020-11-13 | 2023-09-26 | 中国石油天然气股份有限公司 | High-temperature profile control agent and preparation method and application thereof |
| CN114479802B (en) * | 2020-11-13 | 2023-10-31 | 中国石油天然气股份有限公司 | Temperature-resistant gel plugging agent and preparation method and application thereof |
| CN115704287A (en) * | 2021-08-13 | 2023-02-17 | 中国石油天然气股份有限公司 | Chemical temporary plugging shielding well repairing method for thickened oil thermal recovery well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104962263B (en) | 2018-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104962263A (en) | Middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent and water plugging method | |
| CN103306660B (en) | A kind of method of shale gas reservoir fracturing volume increase | |
| CN110159243B (en) | Acid fracturing method for seam network of carbonate rock reservoir | |
| CN101353958B (en) | Acid fracturing process of oil gas well mining temperature control various mucic acid | |
| CN105089603A (en) | Reservoir modifying method through forming crack network by temporary plugging turning in cracks | |
| CN104564002A (en) | Pumping stop sand setting fracture-height-controlling acid fracturing process method applicable to carbonate reservoir | |
| CN105089596A (en) | Hydraulic fracturing treatment method of an unconventional reservoir oil and gas well | |
| CN102022105A (en) | Large composite acid fracturing method of fracture cave type carbonate rock reservoir | |
| CN109751036B (en) | Method for delaying effective fracture reconstruction volume decrement of deep shale gas | |
| RU2012103925A (en) | METHOD FOR CORRECTING A ZONE INSIDE THE UNDERGROUND CONTAINING HYDROCARBON HYDROGEN (OPTIONS) | |
| CN111648755B (en) | Method for promoting balanced expansion of multiple clusters of cracks through ball throwing and temporary plugging | |
| CN105888641A (en) | Carbon dioxide-anti-drag water compound fracturing method | |
| CN103470229B (en) | A kind of high flux sand screen sand control assorted column jacket | |
| CN106703775B (en) | Coal bed gas fracturing method | |
| CN102587873A (en) | Carbon oxide huff-n-puff, water control and oil increment method for horizontal well | |
| CN109826590B (en) | Water plugging and fracturing method for high-water-content old well in low-permeability oil and gas field | |
| CN110159239B (en) | Vertical well large-scale hydraulic fracturing oil jacket co-injection fracturing method | |
| CN104481462A (en) | Coal-bed gas aging well production capacity increasing method | |
| CN110656920B (en) | Acid fracturing method for complex fractures in carbonate reservoir | |
| CN106194105A (en) | Profile control method is thrown in blocking agent deep | |
| CN107630692A (en) | The temporary stall of man-made fracture is to fracturing process in a kind of layer of coal bed gas well | |
| CN103498478A (en) | Curtain grouting construction method for rock dam foundation | |
| CN112302605B (en) | Shale gas horizontal well subsection repeated fracturing method | |
| CN107558950A (en) | Orientation blocking method for the closing of oil shale underground in situ production zone | |
| CN108643876B (en) | Multi-dimensional pipe fracturing method for low-yield well of low-permeability oil field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |