CN102839951A - Production tubular column for rhythm oil layer gravity gas drive and method thereof - Google Patents
Production tubular column for rhythm oil layer gravity gas drive and method thereof Download PDFInfo
- Publication number
- CN102839951A CN102839951A CN2012103344613A CN201210334461A CN102839951A CN 102839951 A CN102839951 A CN 102839951A CN 2012103344613 A CN2012103344613 A CN 2012103344613A CN 201210334461 A CN201210334461 A CN 201210334461A CN 102839951 A CN102839951 A CN 102839951A
- Authority
- CN
- China
- Prior art keywords
- short circuit
- hypotonic
- oil
- sealing
- oil reservoir
- 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
Images
Abstract
The invention discloses a production tubular column for rhythm oil layer gravity gas drive and a method of the production tubular column, and relates to the technical field of oil development and reservoir. The production tubular column is arranged inside an underground oil sleeve and comprises at least one group of low-seepage assemblies, wherein a sealed short circuit is connected on the low-seepage assemblies; a sealing ring is arranged on the upper surfaces of the low-seepage assemblies; the sealing ring is pressed and sealed in the oil sleeve by the sealed short circuit; the upper end of the sealed short circuit is communicated with an exhaust oil tube short circuit; an oil well pump is arranged on the upper end of the exhaust oil tube short circuit; a plurality of exhaust holes are arranged on the side wall of the exhaust oil tube short circuit; and a fluid channel which is communicated with the sealed short circuit is arranged on the upper parts of the low-seepage assemblies. With the adoption of the production tubular column, a gas channelling phenomenon when an individual oil layer injects gas to drive oil can be restrained, so that the gas injection oil driving process is continuously performed, and the production is simultaneously performed in a plurality of oil layers.
Description
Technical field
The present invention relates to the flow string in a kind of oil development oil reservoir technical field, relate in particular to a kind of flow string and method thereof that is used for rhythm oil reservoir gravity gas drive.
Background technology
At present, the exploitation to rhythm oil reservoir in the oil development field is main with displacement in flooding often, and its drawback is that injection water seldom involves at high permeability formation formation passage, low-permeability layer, causes the high moisture and invalid situation of injection water of oil reservoir.Prove that through a large amount of experiments and bench-scale testing gravity gas drive technology helps this type of reservoir development.This gravity gas drive technology is to utilize the density contrast of gas and fluid (crude oil and water) to realize the downward driving of gaseous exchange body, thereby in effectively employing, low-permeability layer.But when gravity gas drive technology cooperates with existing flow string, have following two major technology difficult problems:
1, a plurality of oil reservoirs different to permeability can only be taked other layer of shutoff, the way of individual layer exploitation.During conversion producing zone position, the flow string of cooperation will repeatedly change, and down-hole shutoff and perforation work are frequent.
2, when the individual reservoir injection gas displacement, gas channeling phenomenon still is difficult to control.
More than two difficult problems seriously restricted gravity gas drive The Application of Technology and popularization; The design people is based on being engaged in association area rich experiences and professional knowledge for many years, and gravity gas drive The Application of Technology is actual, actively studies innovation; In the hope of overcoming the above-mentioned shortcoming of prior art; Provide a kind of can suppress the individual reservoir injection gas displacement time gas channeling phenomenon, make the injection gas displacement process continue to carry out, oil gas becomes the continuous phase motion, reduces filtrational resistance, produces when can realize multiple zone; Effectively slow down underground work number of times such as changing tubing string, the flow string and the method for using thereof that are used for rhythm oil reservoir gravity gas drive of enhancing productivity.
Summary of the invention
The purpose of this invention is to provide a kind of can suppress the individual reservoir injection gas displacement time gas channeling phenomenon, make the injection gas displacement process continue to carry out, the flow string that is used for rhythm oil reservoir gravity gas drive that multiple zone is produced simultaneously.
Another object of the present invention provide a kind of can suppress the individual reservoir injection gas displacement time gas channeling phenomenon, make the injection gas displacement process continue to carry out, the production method that is used for rhythm oil reservoir gravity gas drive that multiple zone is produced simultaneously.
For achieving the above object; The present invention proposes a kind of flow string that is used for rhythm oil reservoir gravity gas drive; Be arranged in the oil jacket of down-hole; Said flow string comprises at least one group of hypotonic column assembly, on said hypotonic column assembly, is connected with the sealing short circuit, on said hypotonic column assembly upper surface, is provided with sealing ring; Said sealing ring compresses and is plugged in the said oil jacket through said sealing short circuit; Upper end near the sealing short circuit on the hypotonic column assembly of well head is connected with exhaust oil pipe short circuit, is provided with oil well pump in said exhaust oil pipe short circuit upper end, on the sidewall of said exhaust oil pipe short circuit, offers several steam vents; Said hypotonic column assembly top offers the fluid passage that is connected with said sealing short circuit, makes gas mixture in the oil reservoir under the effect of gravity gas drive, enter to said exhaust oil pipe short circuit via the fluid passage and the said sealing short circuit of every group of said hypotonic column assembly successively from the bottom to top.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive; Wherein, Said flow string is provided with one group of said hypotonic column assembly; Said hypotonic column assembly comprises: hypotonic cylinder, on the periphery wall of said hypotonic cylinder, be arranged with shell with permeability hole, and be provided with steel plate in two ends up and down at said hypotonic cylinder; Contiguous block; Be flush-mounted in the top of said hypotonic cylinder; Circumferentially offer the screw thread groove along said contiguous block upper surface, offer the pull bar interface slot, being opened between said screw thread groove and the said pull bar interface slot of said fluid passage up/down perforation in the center of said contiguous block; The correcting short circuit is the frustum-like shape that connects up and down, and the bottom of said sealing short circuit is inserted on the top of said correcting short circuit, and the bottom cutting ferrule of said sealing short circuit is on the outer wall of said correcting short circuit; Pull bar, vertically through said correcting short circuit and said sealing short circuit, the lower end of said pull bar is fixed in the pull bar interface slot of said contiguous block, and the upper end of said pull bar is upwards stretched out said sealing short circuit top and is provided with the load-bearing ball that is limited to this top.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive, wherein, said flow string comprises two groups of above said hypotonic column assemblies; Each is organized said hypotonic column assembly and from top to bottom is connected together through oil pipe string; Said hypotonic column assembly comprises hypotonic cylinder, contiguous block, correcting short circuit and pull bar, wherein, and said contiguous block; Be flush-mounted in the top of said hypotonic cylinder; Circumferentially offer the screw thread groove along said contiguous block upper surface, offer the pull bar interface slot, being opened between said screw thread groove and the said pull bar interface slot of said fluid passage up/down perforation in the center of said contiguous block; Said correcting short circuit is the frustum-like shape that connects up and down, and the bottom of said sealing short circuit is inserted on the top of said correcting short circuit, and the bottom cutting ferrule of said sealing short circuit is on the outer wall of said correcting short circuit; Said pull bar, vertically through said correcting short circuit and said sealing short circuit, the lower end of said pull bar is fixed in the pull bar interface slot of said contiguous block, and the upper end of said pull bar is upwards stretched out said sealing short circuit top and is provided with the load-bearing ball that is limited to this top; Said hypotonic cylinder comprises hypotonic cylinder of a bottom and the hypotonic cylinder at least one upper strata; On the periphery wall of said hypotonic cylinder, be arranged with shell with permeability hole; Be provided with steel plate in two ends up and down at said hypotonic cylinder; Bottom center by the hypotonic cylinder in said upper strata upwards offers holding channel, and said holding channel is connected with said fluid passage, in said holding channel, is provided with tube connector; Offer the seepage flow hole on the sidewall of said tube connector, the lower end of said tube connector is connected with said oil pipe.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive wherein, engages the place along circumferentially offering bearing groove at said correcting short circuit with said sealing short circuit, in said bearing groove, bearing is installed, and said sealing short circuit cooperates with said bearing element.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive wherein, is provided with the tapering interface in the bottom of said pull bar.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive; Wherein, Said sealing short circuit comprises sealing short circuit body with lumen and the sealing plate that is set in the said sealing short circuit body outside, and said sealing ring compresses and is plugged in the said oil jacket through said sealing plate.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive wherein, offers the said steam vent that two row are crisscross arranged vertically on the sidewall of said exhaust oil pipe short circuit.
The aforesaid flow string that is used for rhythm oil reservoir gravity gas drive wherein, is provided with a plurality of gas block panels on the inwall of said exhaust oil pipe short circuit, said gas block panel is fixed in the top of said steam vent upper edge and is arc bending shape downwards and extends.
The present invention also provides a kind of production method that is used for rhythm oil reservoir gravity gas drive, it is characterized in that, said production method adopts the aforesaid flow string that is used for rhythm oil reservoir gravity gas drive, and said production method may further comprise the steps:
At first, select to be fit to the oil reservoir of gravity gas drive, and definite gas injection well and producing well;
Producing well is carried out underground work, bottom-hole cleaning, the middle and upper part of shutoff high permeability formation; Be lowered to the said flow string that is used for rhythm oil reservoir gravity gas drive;
Hypotonic column assembly closely contacts with corresponding oil reservoir bottom, and the downward crush seal circle of sealing short circuit makes oil reservoir and flow string form sealing area;
Gas injection well begins gas injection, and the producing well initial stage becomes observation state, when having fluid to exist in the oil jacket space, confirms according to level and casing pressure situation whether liquid arrives the oil well pump position in the oil pipe; After reaching standard, producing well work;
According to production fluid amount and liquid level information, the adjustment rate of pumping;
Produce when pumpingh well does not go out liquid and oil jacket space gas pressure and reaches predetermined value, this oil reservoir gas drive stage finishes, and more hypotonic column assembly is adjusted to other layer position.
Compared with prior art, the present invention has following characteristics and advantage:
Gas channeling phenomenon when 1, the present invention can effectively suppress the individual reservoir injection gas displacement significantly improves the recovery ratio of individual reservoir;
2, flow string of the present invention can make the injection gas displacement process continue to carry out after production, and oil gas becomes continuous seepage flow state, reduces filtrational resistance; Reduced because of stopping the interior gas lock effect of formation pore that well builds the pressure and causes, for hole condition is preferably preserved in the later development utilization.
3, flow string of the present invention can satisfy the demand that multiple zone is produced simultaneously, effectively slows down underground work number of times such as changing tubing string, enhances productivity.
Description of drawings
Accompanying drawing described here only is used for task of explanation, and is not intended to limit by any way scope disclosed by the invention.In addition, the shape of each parts among the figure and proportional sizes etc. are merely schematically, be used for helping to understanding of the present invention, and be not shape and the proportional sizes that specifically limits each parts of the present invention.Those skilled in the art can select various possible shapes and proportional sizes to come embodiment of the present invention under instruction of the present invention as the case may be.
Fig. 1 is used for the structural representation of embodiment one of the flow string of rhythm oil reservoir gravity gas drive for the present invention;
Fig. 2 is the structural representation of hypotonic column assembly embodiment one of the present invention;
Fig. 3 is the structural representation of the shell with permeability hole of hypotonic column assembly of the present invention;
Fig. 4 A is the main TV structure sketch map of sealing short circuit of the present invention;
Fig. 4 B is the plan structure sketch map of sealing short circuit of the present invention;
Fig. 5 A is the main TV structure sketch map of contiguous block of the present invention;
Fig. 5 B is the plan structure sketch map of contiguous block of the present invention;
Fig. 6 is the structural representation of correcting short circuit of the present invention;
Fig. 7 is the structural representation of pull bar of the present invention;
Fig. 8 A is the main TV structure sketch map of bearing of the present invention;
Fig. 8 B is the plan structure sketch map of bearing of the present invention;
Fig. 9 A is the main TV structure sketch map of exhaust oil pipe short circuit of the present invention;
Fig. 9 B is vertical part section structural representation of exhaust oil pipe short circuit of the present invention;
Fig. 9 C is the horizontal section structural representation of exhaust oil pipe short circuit of the present invention;
Figure 10 is used for the structural representation of embodiment two of the flow string of rhythm oil reservoir gravity gas drive for the present invention;
Figure 11 is the structural representation of hypotonic column assembly embodiment two of the present invention;
Figure 12 is the structural representation of tube connector of the present invention.
Description of reference numerals:
The hypotonic column assembly of 1-; The hypotonic cylinder of 11-; The hypotonic cylinder of 111-bottom; The hypotonic cylinder in 112-upper strata; The 113-holding channel; The 114-tube connector; 115-seepage flow hole; The 12-contiguous block; 121-screw thread groove; 122-pull bar interface slot; The 123-fluid passage; 13-correcting short circuit; The 131-bearing groove; The 132-bearing; The 133-roller; The 14-pull bar; 141-load-bearing ball; 142-tapering interface; The 15-permeability hole; The 16-shell; The 17-steel plate;
2-seals short circuit; 21-sealing short circuit body; The 22-sealing plate;
The 3-sealing ring; 4-exhaust oil pipe short circuit; The 41-steam vent; The 42-gas block panel; The 5-oil well pump; The 6-oil pipe.
The specific embodiment
In conjunction with the description of the accompanying drawing and the specific embodiment of the invention, can be well understood to details of the present invention more.But the specific embodiment of the present invention described here only is used to explain the object of the invention, is limitation of the present invention and can not be understood as by any way.Under instruction of the present invention, the technician can conceive based on possible distortion arbitrarily of the present invention, and these all should be regarded as and belong to scope of the present invention.
The flow string that is used for rhythm oil reservoir gravity gas drive that the present invention proposes; Be arranged in the oil jacket of down-hole, this flow string comprises at least one group of hypotonic column assembly, on hypotonic column assembly, is connected with the sealing short circuit; On hypotonic column assembly upper surface, be provided with sealing ring; Sealing ring compresses and is plugged in the oil jacket through the sealing short circuit, is connected with exhaust oil pipe short circuit near the upper end of the sealing short circuit on the hypotonic column assembly of well head, on exhaust oil pipe short circuit, is provided with oil well pump; On the sidewall of exhaust oil pipe short circuit, offer several steam vents; Hypotonic column assembly top offers and seals the fluid passage that short circuit is connected, and makes gas mixture in the oil reservoir under the effect of gravity gas drive, enter to exhaust oil pipe short circuit via the fluid passage of every group of hypotonic column assembly with the sealing short circuit successively from the bottom to top, discharges gas through exhaust oil pipe short circuit; Oil well pump is drawn to oil body aboveground, realizes rhythm oil reservoir gravity gas drive oil recovery function.
Please refer to Fig. 1, be used for the structural representation of embodiment one of the flow string of rhythm oil reservoir gravity gas drive for the present invention.As shown in Figure 1; Present embodiment is used for the gravity gas drive of individual layer oil reservoir; The flow string of present embodiment is provided with one group of hypotonic column assembly 1; On hypotonic column assembly 1, be connected with sealing short circuit 2, on hypotonic column assembly 1 upper surface, be provided with sealing ring 3, sealing ring 3 compresses and is plugged in the oil jacket through sealing short circuit 2.In the present embodiment, shown in Fig. 4 A, 4B, sealing short circuit 2 comprises sealing short circuit body 21 with lumen and the sealing plate 22 that is set in sealing short circuit body 21 outsides, and sealing ring 3 compresses and is plugged in the oil jacket through sealing plate 22.Upper end near the sealing short circuit 2 on the hypotonic column assembly 1 of well head is connected with exhaust oil pipe short circuit 4; Be provided with oil well pump 5 in exhaust oil pipe short circuit 4 upper ends; On the sidewall of exhaust oil pipe short circuit 4, offer several steam vents 41; Hypotonic column assembly 1 top offers and seals the fluid passage 123 that short circuit 2 is connected; Make gas mixture in the oil reservoir under the effect of gravity gas drive, enter to exhaust oil pipe short circuit 4 via the fluid passage of every group of hypotonic column assembly 1 with sealing short circuit 2 successively from the bottom to top, discharge gases through exhaust oil pipe short circuit 4, oil well pump 5 is drawn to oil body aboveground.Please refer to Fig. 2 to Fig. 7; The master who is respectively structural representation, the sealing short circuit of structural representation, the shell of hypotonic column assembly embodiment one of the present invention looks master with plan structure sketch map, contiguous block and looks the structural representation with plan structure sketch map, correcting short circuit, and the structural representation of pull bar.As shown in the figure; Hypotonic column assembly 1 comprises: hypotonic cylinder 11, contiguous block 12, correcting short circuit 13 and pull bar 14; Wherein: like Fig. 2, shown in 3; Hypotonic cylinder 11 is cylindric, on the periphery wall of hypotonic cylinder 11, is arranged with the shell 16 with permeability hole 15, makes oil gas fluid-mixing permeability hole 15 through shell 16 under the effect of gravity gas drive in down-hole enter in the hypotonic cylinder 11.The permeability rank of hypotonic cylinder 11 is low than oil reservoir, and the gas drive filtrational resistance is greater than inside, stratum.Two ends be provided with steel plate 17 at hypotonic cylinder about in the of 11, play load-bearing and stop fluid to get into the effect in oil jacket space, top via hypotonic cylinder 11 upper surfaces.
Shown in Fig. 5 A, 5B, contiguous block 12 is a steel material, is flush-mounted in the groove at hypotonic cylinder 11 tops; Circumferentially offer screw thread groove 121 along contiguous block 12 upper surfaces; Be used to connect correcting short circuit 13, offer pull bar interface slot 122, be used for cylinder lever connecting rod 14 in the center of contiguous block 12.Being opened between screw thread groove 121 and the pull bar interface slot 122 of fluid passage 123 up/down perforations makes fluid infiltrate in the correcting short circuit 13 via fluid passage 123, entered to the sealing short circuit 2 and the exhaust oil pipe short circuit 4 of top again by correcting short circuit 13.
As shown in Figure 6, correcting short circuit 13 is up and down the frustum-like shape that connects, and plays the effect that top oil pipe 6 or exhaust oil pipe short circuit 4 and contiguous block 12 accurately are located by connecting.The bottom of sealing short circuit 2 is inserted on the top of correcting short circuit 13, makes correcting short circuit 13 be connected with sealing short circuit 2; The lower end of correcting short circuit 13 is threaded with the screw thread groove 121 of contiguous block 12, makes correcting short circuit 13 be erected on the contiguous block 12.The bottom cutting ferrule of sealing short circuit 2 is on the outer wall of correcting short circuit 13, and is descending along the outer wall of correcting short circuit 13 when sealing short circuit 2 stressed pressing down, thereby compresses sealing ring 3, makes sealing ring 3 distortion reservoir pluggings be communicated with oil pipe top.Formation fluid can only be by the oil reservoir bottom hypotonic cylinder 11 of flowing through, and it is inner to get into oil pipe.
Please in the lump with reference to figs. 2 and 7; Pull bar 14 runs through correcting short circuit 13 and sealing short circuit 2 vertically, and the lower end of pull bar 14 is fixed in the pull bar interface slot 122 of contiguous block 12, and the upper end of pull bar 14 is upwards stretched out sealing short circuit 2 tops and is provided with the load-bearing ball 141 that is limited to this top; During the upper lifting pipe post; Load-bearing ball 141 is stuck on the packoff nipple 2, makes pull bar 14 can drive on the hypotonic column assembly 1 and carries, and work to bear bottom tubing string weight.Further, be provided with tapering interface 142 in the bottom of pull bar 14, tapering interface 142 matches with the pull bar interface slot 122 of contiguous block 12, with the fastness that guarantees to be connected between pull bar 14 and the contiguous block 12.
Shown in Fig. 6,8A, 8B, engage the place along circumferentially offering bearing groove 131 at correcting short circuit 13 with sealing short circuit 2, bearing 132 is installed in bearing groove 131, the inwall of sealing short circuit 2 rolls with bearing 132 and cooperates.In the present embodiment, bearing 132 is a roller bearing, and these roller bearing 132 upper edges circumferentially are evenly distributed with a plurality of rollers 133, can certainly adopt other suitable rolling bearing.Bearing groove 131 blocks bearing 132, and the effect of bearing 132 is at packoff nipple 2 during through the downward crush seal circle 3 of rotation, reduces the frictional force of packoff nipple 2 and 13 of correcting short circuits, guarantees sealing ring 3 crimps, evenly seals.
Please refer to Fig. 9 A, 9B, 9C, as shown in the figure, discharge flow string smoothly in order to guarantee gas, on the sidewall of exhaust oil pipe short circuit 4, offer the steam vent 41 that two row are crisscross arranged vertically.Wherein, be spaced apart 20cm in every row steam vent between adjacent two steam vents 41, the central horizontal axis of corresponding steam vent 41 is at a distance of 5cm in the two row steam vents 41, and the aperture of steam vent 41 is 5cm～7cm.
Further, shown in Fig. 9 A, 9B, 9C, on the inwall of exhaust oil pipe short circuit 4, be provided with a plurality of gas block panels 42, gas block panel 42 is fixed in the top of steam vent 41 upper edges and is arc bending shape downwards and extends.After fluid flowed into exhaust tubing nipple 4 in the hypotonic cylinder 11, gas issued estranged leaving in action of gravity, got into the oil jacket spaces near the portion gas of exhaust oil pipe short circuit 4 tube walls by steam vent 41; Another part gas is then stopped by the gas block panel 42 that distributes up and down and guides to the oil jacket space, makes that like this fluid in the oil pipe of top is liquid, guarantees the operating efficiency of oil well pump.
As another optional embodiment of the present invention, please refer to Figure 10, be used for the structural representation of embodiment two of the flow string of rhythm oil reservoir gravity gas drive for the present invention.Shown in figure 10; The flow string that the present invention is used for rhythm oil reservoir gravity gas drive comprises the hypotonic column assembly 1 of two groups above (comprising two groups); Each is organized hypotonic column assembly 1 and from top to bottom is serially connected through oil pipe 6, is used for the multilayer oil reservoir is carried out the production operation of gravity gas drive simultaneously.The hypotonic column assembly structure of hypotonic column assembly in the present embodiment and embodiment one is basic identical; Its difference only is; Hypotonic cylinder 11 comprises hypotonic cylinder 111 of a bottom and the hypotonic cylinder 112 at least one upper strata; The hypotonic cylinder 111 of bottom is different with the permeability of the hypotonic cylinder 112 in upper strata, and the permeability of common hypotonic cylinder is successively to lower floor by the upper strata successively decreases.The hypotonic cylinder 111 of bottom is identical with the structure of the hypotonic cylinder 11 of embodiment one; Be the hypotonic cylinder of solid (apertured structure), and shown in figure 11, upwards offer holding channel 113 by the bottom center of the hypotonic cylinder 112 in upper strata; This holding channel 113 is connected with fluid passage 123; In holding channel 113, be provided with tube connector 114, shown in figure 12, offer seepage flow hole 115 on the sidewall of tube connector 114; Make the fluid of this oil reservoir in seepage flow hole 115 flows into tube connectors 114; The lower end of tube connector 114 is connected with oil pipe 6, makes that the fluid in lower floor's oil reservoir gets into tube connector 114 through the lower port of oil pipe 6 and tube connector 114, is flowed into the fluid passage 123 of upper end and is made progress by tube connector 114 again and flow.Like this; The fluid of each oil reservoir is collected to exhaust oil pipe short circuit 4 and carries out Oil-gas Separation through hypotonic column assembly 1, sealing short circuit 2, the oil pipe 6 of each layer correspondence; Through oil well pump 5 liquid is extracted out again; Thereby produce when having realized multiple zone, effectively slow down underground work number of times such as changing tubing string, enhance productivity.
Operating principle of the present invention is: with the shutoff of individual layer middle and upper part; The lower hypotonic column assembly of contact permeability rank in the individual layer bottom, hypotonic column assembly is the simulation rock tubing string, the core of simulation rock tubing string is hypotonic post; Mainly comprise outer wall and inner hypotonic cylinder; Outer wall is made up of with the steel plate 17 that last bottom surface is provided with the cylindrical tube shell 16 of eye with holes, and bottom surface is the sealing plectane, and upper bottom surface is connected with contiguous block 12.The hypotonic medium of filling forms fine and close hypotonic cylinder 11 in the shell 16.Hypotonic is for the stratum that this tubing string is used, and supposes that in-place permeability is 500md, and then hypotonic cylinder design is 200md, and this ratio needs to formulate according to actual conditions.The filling material can be formed by true rock, quartz sandstone gluing, and manufacturing process comprises: charges mix with glue, compacting, test etc.Hypotonic cylinder and the outer wall made are combined closely, and fluid is not along the outer wall flows inside.Formation oil is injecting bottom, atmospheric pressure lower edge hole, in the simulation rock tubing string gets into oil pipe.Because the permeability of simulation rock tubing string is low, thereby injects gas and in individual layer, assemble, form, will not involve crude oil in a large number and promote to the flow string direction by the bottom to the pneumatic jack that presses down.Shutoff of the present invention the middle and upper part of individual layer, thereby suppressed the has channeling of gas in the top of oil horizon; Be provided with hypotonic column assembly in the bottom, not only guaranteed the continuity of whole gas drive process, also suppressed the has channeling of bottom.And flow string of the present invention adopts cascaded structure to use simultaneously at a plurality of oil reservoirs, thereby produces when can realize multiple zone, effectively slows down underground work number of times such as changing tubing string, enhances productivity.In addition, the present invention is provided with exhaust tubing nipple 4 in the superiors, and the gas of output is discharged to outside the tubing string, guarantees the full liquid working state of oil well pump 5, has improved the pumping efficiency of oil well pump 5.Gas gets into the oil jacket space, is convenient to the pressure monitoring on ground, and with timely adjustment tubing string state guidance is provided for analyzing the reservoir exploitation situation.
The present invention also provides a kind of production method that is used for rhythm oil reservoir gravity gas drive, and this production method adopts the aforesaid flow string that is used for rhythm oil reservoir gravity gas drive, and this production method may further comprise the steps:
At first, select to be fit to the oil reservoir of gravity gas drive, and definite gas injection well and producing well;
Producing well is carried out underground work, bottom-hole cleaning, the middle and upper part of shutoff high permeability formation; Be lowered to the said flow string that is used for rhythm oil reservoir gravity gas drive;
Hypotonic column assembly closely contacts with corresponding oil reservoir bottom, and the downward crush seal circle of sealing short circuit makes oil reservoir and flow string form sealing area;
Gas injection well begins gas injection, and the producing well initial stage becomes observation state, when having fluid to exist in the oil jacket space, confirms according to level and casing pressure situation whether liquid arrives the oil well pump position in the oil pipe; After reaching standard, producing well work;
This moment, oil reservoir inner fluid flow event was following: inject gas under action of gravity, assemble on high permeability formation top, drive formation oil and formation water downwards, profit gets in the oil pipe by the oil well pump output; After exploitation a period of time, gas progressively moves down, when leading edge gas along the bottom hole, in the time of in hypotonic flow string gets into oil pipe, on the one hand hypotonic flow string needs big pressure reduction, thereby suppresses the has channeling of bottom, makes gas continue to assemble on top the displacement of reservoir oil.On the other hand, portion gas gets into flow string, but gets into the oil jacket space at exhaust oil pipe short circuit place, continues to keep the operate as normal efficient of oil well pump.During gas flow big (casing pressure is higher), can be by sleeve valve with getter body and decompression.
According to production fluid amount and liquid level information, the adjustment rate of pumping;
Produce when pumpingh well does not go out liquid and oil jacket space gas pressure and reaches predetermined value, this oil reservoir gas drive stage finishes, and more hypotonic column assembly is adjusted to other layer position.
For a plurality of oil reservoirs, can carry out the series connection of packoff nipple and hypotonic column assembly, the increase of complicated operating process property.But reduced the replacement of exploitation oil reservoir, the corresponding underground work number of times such as replacing tubing string that reduced effectively improves oil recovery efficiency.
The present invention is used for the flow string of rhythm oil reservoir gravity gas drive, in the laboratory, shows with conventional development approach comparing result, on average improves the recovery ratio amplitude and surpasses 30%.
Concrete experimentation is following:
Experiment condition: select the quartz sand of three types of particle diameters for use, made the rhythm sandpack column of rectangle, select certain well degassed crude and formation water for use, injecting gas is pure CO
2Gas.50 ℃ of experimental temperatures, pressure 10MPa.Adopt crestal gas injection, the mode of bottom exploitation.
Experimental result: the ultimate recovery of conventional development approach is 13.8%, is 56.4% and adopt the method ultimate recovery of flow string of the present invention.
Experimental analysis: conventional gas drive method production curve shows that gas channeling phenomenon is obvious, when 0.3PV, forms the has channeling passage, injects a large amount of extraction of gas, and no longer extraction of profit.Adopt method of the present invention then significantly to promote recovery percent of reserves, curve table reveals three phases, and early stage in each, recovery ratio increased fast in stage, and amplification reduces afterwards; Significantly promote again after a period of time.This feature instantiation gas accumulation process in single oil reservoir.The design that flow string of the present invention also is described can be given full play to the characteristics that gas is prone to get into micro-pore, realizes the raising of recovery ratio.
To the illustrated in detail of above-mentioned each embodiment, its purpose only is the present invention is made an explanation, so that can understand the present invention better; But; It is limitation of the present invention that these descriptions can not be construed to any reason, and particularly, each characteristic of in different embodiment, describing is combination in any each other also; Thereby form other embodiments; Except clear and definite opposite description is arranged, these characteristics should be understood that can be applied in any one embodiment, and also not only are confined to described embodiment.
Claims (10)
1. flow string that is used for rhythm oil reservoir gravity gas drive; Be arranged in the oil jacket of down-hole; It is characterized in that; Said flow string comprises at least one group of hypotonic column assembly, on said hypotonic column assembly, is connected with the sealing short circuit, on said hypotonic column assembly upper surface, is provided with sealing ring; Said sealing ring compresses and is plugged in the said oil jacket through said sealing short circuit; Upper end near the sealing short circuit on the hypotonic column assembly of well head is connected with exhaust oil pipe short circuit, is provided with oil well pump in said exhaust oil pipe short circuit upper end, on the sidewall of said exhaust oil pipe short circuit, offers several steam vents; Said hypotonic column assembly top offers the fluid passage that is connected with said sealing short circuit, makes gas mixture in the oil reservoir under the effect of gravity gas drive, enter to said exhaust oil pipe short circuit via the fluid passage and the said sealing short circuit of every group of said hypotonic column assembly successively from the bottom to top.
2. the flow string that is used for rhythm oil reservoir gravity gas drive as claimed in claim 1 is characterized in that, said flow string is provided with one group of said hypotonic column assembly, and said hypotonic column assembly comprises:
Hypotonic cylinder is arranged with the shell with permeability hole on the periphery wall of said hypotonic cylinder, be provided with steel plate in two ends up and down at said hypotonic cylinder;
Contiguous block; Be flush-mounted in the top of said hypotonic cylinder; Circumferentially offer the screw thread groove along said contiguous block upper surface, offer the pull bar interface slot, being opened between said screw thread groove and the said pull bar interface slot of said fluid passage up/down perforation in the center of said contiguous block;
The correcting short circuit is the frustum-like shape that connects up and down, and the bottom of said sealing short circuit is inserted on the top of said correcting short circuit, and the bottom cutting ferrule of said sealing short circuit is on the outer wall of said correcting short circuit;
Pull bar, vertically through said correcting short circuit and said sealing short circuit, the lower end of said pull bar is fixed in the pull bar interface slot of said contiguous block, and the upper end of said pull bar is upwards stretched out said sealing short circuit top and is provided with the load-bearing ball that is limited to this top.
3. the flow string that is used for rhythm oil reservoir gravity gas drive as claimed in claim 1; It is characterized in that; Said flow string comprises two groups of above said hypotonic column assemblies, and each is organized said hypotonic column assembly and from top to bottom is connected together through oil pipe string, and said hypotonic column assembly comprises hypotonic cylinder, contiguous block, correcting short circuit and pull bar; Wherein
Said contiguous block; Be flush-mounted in the top of said hypotonic cylinder; Circumferentially offer the screw thread groove along said contiguous block upper surface, offer the pull bar interface slot, being opened between said screw thread groove and the said pull bar interface slot of said fluid passage up/down perforation in the center of said contiguous block;
Said correcting short circuit is the frustum-like shape that connects up and down, and the bottom of said sealing short circuit is inserted on the top of said correcting short circuit, and the bottom cutting ferrule of said sealing short circuit is on the outer wall of said correcting short circuit;
Said pull bar, vertically through said correcting short circuit and said sealing short circuit, the lower end of said pull bar is fixed in the pull bar interface slot of said contiguous block, and the upper end of said pull bar is upwards stretched out said sealing short circuit top and is provided with the load-bearing ball that is limited to this top;
Said hypotonic cylinder comprises hypotonic cylinder of a bottom and the hypotonic cylinder at least one upper strata; On the periphery wall of said hypotonic cylinder, be arranged with shell with permeability hole; Be provided with steel plate in two ends up and down at said hypotonic cylinder; Bottom center by the hypotonic cylinder in said upper strata upwards offers holding channel, and said holding channel is connected with said fluid passage, in said holding channel, is provided with tube connector; Offer the seepage flow hole on the sidewall of said tube connector, the lower end of said tube connector is connected with said oil pipe.
4. like claim 2 or the 3 described flow strings that are used for rhythm oil reservoir gravity gas drive; It is characterized in that; Engage the place with said sealing short circuit along circumferentially offering bearing groove at said correcting short circuit, in said bearing groove, bearing is installed, said sealing short circuit and said bearing element are movingly.
5. the flow string that is used for rhythm oil reservoir gravity gas drive as claimed in claim 4 is characterized in that said bearing is a roller bearing.
6. like claim 2 or the 3 described flow strings that are used for rhythm oil reservoir gravity gas drive, it is characterized in that, be provided with the tapering interface in the bottom of said pull bar.
7. like claim 1 or the 2 or 3 described flow strings that are used for rhythm oil reservoir gravity gas drive; It is characterized in that; Said sealing short circuit comprises sealing short circuit body with lumen and the sealing plate that is set in the said sealing short circuit body outside, and said sealing ring compresses and is plugged in the said oil jacket through said sealing plate.
8. like claim 1 or the 2 or 3 described flow strings that are used for rhythm oil reservoir gravity gas drive, it is characterized in that, on the sidewall of said exhaust oil pipe short circuit, offer the said steam vent that two row are crisscross arranged vertically.
9. the flow string that is used for rhythm oil reservoir gravity gas drive as claimed in claim 8 is characterized in that, on the inwall of said exhaust oil pipe short circuit, is provided with a plurality of gas block panels, and said gas block panel is fixed in the top of said steam vent upper edge and is arc bending shape downwards and extends.
10. a production method that is used for rhythm oil reservoir gravity gas drive is characterized in that, said production method adopts like each described flow string that is used for rhythm oil reservoir gravity gas drive in the claim 1 to 9, and said production method may further comprise the steps:
At first, select to be fit to the oil reservoir of gravity gas drive, and definite gas injection well and producing well;
Producing well is carried out underground work, bottom-hole cleaning, the middle and upper part of shutoff high permeability formation; Be lowered to the said flow string that is used for rhythm oil reservoir gravity gas drive;
Hypotonic column assembly closely contacts with corresponding oil reservoir bottom, and the downward crush seal circle of sealing short circuit makes oil reservoir and flow string form sealing area;
Gas injection well begins gas injection, and the producing well initial stage becomes observation state, when having fluid to exist in the oil jacket space, confirms according to level and casing pressure situation whether liquid arrives the oil well pump position in the oil pipe; After reaching standard, producing well work;
According to production fluid amount and liquid level information, the adjustment rate of pumping;
Produce when pumpingh well does not go out liquid and oil jacket space gas pressure and reaches predetermined value, this oil reservoir gas drive stage finishes, and more hypotonic column assembly is adjusted to other layer position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334461.3A CN102839951B (en) | 2012-09-11 | 2012-09-11 | Production tubular column for rhythm oil layer gravity gas drive and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334461.3A CN102839951B (en) | 2012-09-11 | 2012-09-11 | Production tubular column for rhythm oil layer gravity gas drive and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102839951A true CN102839951A (en) | 2012-12-26 |
| CN102839951B CN102839951B (en) | 2015-05-06 |
Family
ID=47367643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210334461.3A Active CN102839951B (en) | 2012-09-11 | 2012-09-11 | Production tubular column for rhythm oil layer gravity gas drive and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102839951B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234677B (en) * | 2013-06-18 | 2016-12-28 | 中国石油天然气股份有限公司 | A kind of vertical displacement of gas injection improves gas condensate reservoir condensate recovery ratio method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078341A (en) * | 2007-05-25 | 2007-11-28 | 冯永胜 | Oil gas water well open hole filling sand prevention completion method and tool |
| US20090084553A1 (en) * | 2004-12-14 | 2009-04-02 | Schlumberger Technology Corporation | Sliding sleeve valve assembly with sand screen |
| CN201460856U (en) * | 2009-08-12 | 2010-05-12 | 苗在朝 | Combined gas and sand anchor |
| CN202832435U (en) * | 2012-09-11 | 2013-03-27 | 中国石油天然气股份有限公司 | Production tubular column used for rhythm oil layer gravity gas drive |
-
2012
- 2012-09-11 CN CN201210334461.3A patent/CN102839951B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090084553A1 (en) * | 2004-12-14 | 2009-04-02 | Schlumberger Technology Corporation | Sliding sleeve valve assembly with sand screen |
| CN101078341A (en) * | 2007-05-25 | 2007-11-28 | 冯永胜 | Oil gas water well open hole filling sand prevention completion method and tool |
| CN201460856U (en) * | 2009-08-12 | 2010-05-12 | 苗在朝 | Combined gas and sand anchor |
| CN202832435U (en) * | 2012-09-11 | 2013-03-27 | 中国石油天然气股份有限公司 | Production tubular column used for rhythm oil layer gravity gas drive |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234677B (en) * | 2013-06-18 | 2016-12-28 | 中国石油天然气股份有限公司 | A kind of vertical displacement of gas injection improves gas condensate reservoir condensate recovery ratio method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102839951B (en) | 2015-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111520119B (en) | Method for efficiently extracting coal bed gas by staged fracturing of large-spacing thin coal seam group multi-bottom horizontal well | |
| CN105114048B (en) | A kind of staged fracturing of horizontal well single-well injection-production oil production method | |
| CN201714364U (en) | Tubular column for horizontal well barefoot well completion staged fracturing acidizing tool | |
| CN105696997A (en) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fracturing horizontal well fractures | |
| CN203285408U (en) | High pressure layered water injection tubular column | |
| CN105888630A (en) | Method for improving recovery efficiency through huff and puffoil recoveryof tight oil fractured horizontal well | |
| CN105756634A (en) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fractured horizontal well cracks | |
| CN109653721B (en) | Fracturing and energy-increasing oil displacement integrated process method for shallow low-pressure low-permeability oil reservoir | |
| CN202325428U (en) | Driving-drainage composite oil production system | |
| CN102808584A (en) | Mechanical water plugging pipe column for multi-point discharge of cased hole completion multi-section fractured horizontal well and method | |
| CN102330546A (en) | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string | |
| CN102777155A (en) | Shale gas bridge plug subsection completion method | |
| CN105822276A (en) | Inter-crack space synchronous water injection-oil extraction method of multistage fracturing horizontal well | |
| CN201620853U (en) | Constant-pressure gasproof pipe column of multilayer mining single pump | |
| CN102410009A (en) | Controlled-valve placed well-cementing staged-fracturing well-completion string and hydraulically-controlled switch string | |
| CN109322647A (en) | A kind of demixing injection-production integrated pipe column and technique | |
| CN111946300B (en) | Same-well same-layer multi-lateral self-injection and production underground fluid separation self-driving well and production method | |
| CN112983358A (en) | Method for exploiting coal bed gas by injecting carbon dioxide between same well seams of horizontal well | |
| CN202832435U (en) | Production tubular column used for rhythm oil layer gravity gas drive | |
| CN203188991U (en) | Sliding sleeve type layered eight-level fracturing pipe column | |
| CN209892171U (en) | Horizontal well section staggered displacement and imbibition displacement injection-production string | |
| CN102839951B (en) | Production tubular column for rhythm oil layer gravity gas drive and method thereof | |
| CN210134883U (en) | Injection-production integrated pipe column in same well | |
| CN202810675U (en) | Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well | |
| CN202300357U (en) | Well cementing staged fracturing well completion pipe column with controllable valves and hydraulic control switch pipe column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |