Particle filling completion pipe string and particle filling completion method for development well
阅读说明:本技术 颗粒物填充完井管柱及开发井颗粒物填充完井方法 (Particle filling completion pipe string and particle filling completion method for development well ) 是由 刘言理 付大其 杨延征 聂上振 徐禄帆 曾晓辉 于 2020-08-06 设计创作,主要内容包括:本公开提供了一种颗粒物填充完井管柱及颗粒物填充完井方法,属于开发井完井技术领域。注入溶解液,从内管柱流进的溶解液可以从底座的过流孔,流向外管柱与开发井井眼的井壁之间的空间内,溶解液逐渐充满外管柱与开发井井眼的井壁之间的空间。外管柱的连接管体的可溶解管会直接与溶解液接触并被溶解液溶解消失。可溶解管消失之后,干燥颗粒物层遇水膨胀,逐渐将外管柱与开发井井眼的井壁之间的空间充满。完成对开发井井眼的防砂工序。下放一趟管柱即可完成对开发井井眼的颗粒物的填充,简化了开发井的防砂工序。(The disclosure provides a particle filling well completion pipe column and a particle filling well completion method, and belongs to the technical field of well completion of development wells. And injecting the solution, wherein the solution flowing in from the inner pipe column can flow into the space between the outer pipe column and the well wall of the well bore of the development well from the overflowing hole of the base, and the solution gradually fills the space between the outer pipe column and the well wall of the well bore of the development well. The dissoluble tube of the connecting tube body of the outer tube column can directly contact with the dissolving liquid and be dissolved and disappear by the dissolving liquid. After the dissolvable tube disappears, the dry particulate layer swells in the presence of water, gradually filling the space between the outer tubing string and the wall of the development well bore. And finishing the sand control process of the well bore of the development well. The filling of the particles in the well hole of the development well can be completed by lowering the pipe column once, and the sand prevention process of the development well is simplified.)
1. A completion string for particulate packing, characterized in that it comprises an outer string (1) and an inner string (2),
the outer pipe column (1) comprises a base (11) and a connecting pipe body (12), the base (11) is connected with one end of the connecting pipe body (12) in a sealing mode, an overflowing hole (11a) communicated with the connecting pipe body (12) is formed in the base (11), the connecting pipe body (12) comprises a sieve pipe (121), a dry particle layer (122) and a soluble pipe (123), the dry particle layer (122) covers the outer peripheral wall of the sieve pipe (121), the dry particle layer (122) comprises dry particles capable of expanding in water, and the soluble pipe (123) covers the outer peripheral wall of the dry particle layer (122);
the inner pipe column (2) is coaxially positioned in the connecting pipe body (12), and one end of the inner pipe column (2) is inserted into the base (11) and communicated with the overflowing hole (11 a).
2. The particulate filled completion string of claim 1, wherein the dry particulate is a polyurethane polymer or an expanded polystyrene polymer.
3. The particulate filled completion string of claim 1, wherein the dissolvable tube (123) is made of a magnesium aluminum alloy doped with a rare earth element.
4. A particle packed completion string according to any of claims 1 to 3, wherein the outer string (1) further comprises an overflow plate (13), the overflow plate (13) is in interference fit with the overflow hole (11a), and the overflow plate (13) has a plurality of overflow holes (131).
5. A particle packing completion string according to any of claims 1 to 3, wherein the base (11) comprises a cylindrical shell (111), a circular plate (112) and a hemispherical plate (113), one end of the cylindrical shell (111) is coaxially and hermetically connected with one end of the connecting pipe body (12), the circular plate (112) is coaxially fixed in the cylindrical shell (111), the circular plate (112) is provided with a coaxial positioning hole (112a), the other end of the cylindrical shell (111) is coaxially fixed with the end surface of the hemispherical plate (113), and the overflowing hole (11a) is located on the hemispherical plate (113).
6. A particle-filled completion string according to claim 5, wherein the inner string (2) comprises a first pipe section (21) and a second pipe section (22) which are coaxially connected, wherein the outer diameter and the inner diameter of the first pipe section (21) are both larger than the inner diameter and the outer diameter of the second pipe section (22), and the second pipe section (22) is coaxially located in the positioning hole (112 a).
7. A particle-packed well completion method implemented by using the particle-packed well completion string according to any one of claims 1 to 6, the particle-packed well completion method comprising:
putting particles down in the development well hole to fill the well completion pipe column, wherein the volume of the dry particle layer is 0.2-0.3 times of the volume of a space between the outer peripheral wall of the dissolvable pipe and the well wall of the development well hole;
and introducing a dissolving solution into the inner pipe column of the particle filling completion pipe column, wherein the dissolving solution dissolves the soluble pipe of the outer pipe column, and the dry particle layer expands to fill the space between the outer pipe column and the well wall of the development well.
8. The method of completing a particle pack completion according to claim 7 wherein the step of introducing a solution into the inner string of the particle pack completion string comprises:
and introducing a dissolving solution into the inner tubular column of the particle filling completion tubular column, wherein the time for introducing the dissolving solution into the inner tubular column is 0.5-1 h.
9. The particulate infill completion method of claim 7 or 8, further comprising:
before a particle filling completion pipe string is lowered in a development well hole, a sieve pipe and a dissolvable pipe in the outer pipe string are coaxially connected to a base of the outer pipe string, and the volume of a space between the sieve pipe and the dissolvable pipe of the outer pipe string is a filling volume;
and compressing and filling the dry particles between the sieve tube and the soluble tube, wherein the volume of the compressed and filled dry particles is 5-10 times of the filling volume, and forming the dry particle layer.
10. The particle packing completion method according to claim 7 or 8, wherein the dissolvable tube is made of a magnesium aluminum alloy doped with a rare earth element, and the dissolving solution is a dissolving solution containing chloride ions.
Technical Field
The disclosure relates to the technical field of well completion of development wells, in particular to a particle filling well completion pipe string and a particle filling well completion method.
Background
A development well is a well that is relatively common for the production of oil or gas. In the process of drilling and completing the well, a sand prevention measure is generally adopted for the development well, so that the sand production condition of the development well in the later development is prevented, and the sand in an oil-gas reservoir is prevented from entering the development well.
The development well is usually sand-proof by gravel packing, and the gravel packing needs a development well completion string. In gravel packing a development well, a development well completion string is typically lowered into the development well bore to form a plurality of annular spaces between the development well completion string and the walls of the development well bore. Gravel is packed in the plurality of annular spaces by the development well completion string.
Disclosure of Invention
The embodiment of the disclosure provides a particle filling completion pipe column and a particle filling completion method, which can simplify the sand control process of a development well. The particle filling completion method comprises the following steps:
the disclosed embodiments provide a particulate packing completion method, the particulate packing completion string comprising an outer string and an inner string,
the outer pipe column comprises a base and a connecting pipe body, the base is connected with one end of the connecting pipe body in a sealing mode, an overflowing hole communicated with the connecting pipe body is formed in the base, the connecting pipe body comprises a sieve pipe, a dry particle layer and a soluble pipe, the dry particle layer covers the outer peripheral wall of the sieve pipe, the dry particle layer comprises dry particles capable of expanding in water, and the soluble pipe covers the outer peripheral wall of the dry particle layer;
the inner pipe column is coaxially positioned in the connecting pipe body, and one end of the inner pipe column is inserted into the base and is communicated with the overflowing hole.
Optionally, the dry particulate is a polyurethane polymer or an expanded polystyrene polymer.
Optionally, the dissolvable tube is made of a magnesium aluminum alloy doped with a rare earth element.
Optionally, the outer tubular column further comprises an overflow plate, the overflow plate is in interference fit with the overflow hole, and the overflow plate is provided with a plurality of overflow holes.
Optionally, the base includes shell ring, circular slab and hemisphere board, the one end of shell ring with the coaxial sealing connection of one end of connecting tube body, the circular slab is coaxial to be fixed in the shell ring, coaxial locating hole has on the circular slab, the other end of shell ring then is coaxial fixed with the terminal surface of hemisphere board, the discharge orifice is located on the hemisphere board.
Optionally, the inner tubular column includes a first pipe joint and a second pipe joint that are coaxially connected, the outer diameter and the inner diameter of the first pipe joint are both greater than the inner diameter and the outer diameter of the second pipe joint, and the second pipe joint is coaxially located in the positioning hole.
The embodiment of the disclosure provides a particle filling well completion method, which is realized by adopting the particle filling well completion string as described above, and the particle filling well completion method comprises the following steps:
putting particles down in the development well hole to fill the well completion pipe column, wherein the volume of the dry particle layer is 0.2-0.3 times of the volume of a space between the outer peripheral wall of the dissolvable pipe and the well wall of the development well hole;
and introducing a dissolving solution into the inner pipe column of the particle filling completion pipe column, wherein the dissolving solution dissolves the soluble pipe of the outer pipe column, and the dry particle layer expands to fill the space between the outer pipe column and the well wall of the development well.
Optionally, the introducing a dissolving solution into the inner tubular column of the completion string for filling the particles comprises:
and introducing a dissolving solution into the inner tubular column of the particle filling completion tubular column, wherein the time for introducing the dissolving solution into the inner tubular column is 0.5-1 h.
Optionally, the particulate packing completion method further comprises:
before a particle filling completion pipe string is lowered in a development well hole, a sieve pipe and a dissolvable pipe in the outer pipe string are coaxially connected to a base of the outer pipe string, and the volume of a space between the sieve pipe and the dissolvable pipe of the outer pipe string is a filling volume;
and compressing and filling the dry particles between the sieve tube and the soluble tube, wherein the volume of the filled dry particles is 5-10 times of the filling volume, and forming the dry particle layer.
Optionally, the soluble pipe is made of magnesium aluminum alloy doped with rare earth elements, and the solution is solution containing chloride ions.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
and sealing and fixing the outer wall of the first pipe column of the outer pipe column on the well wall of the well hole of the development well, and lowering the inner pipe column into the outer pipe column. And injecting the dissolving liquid from the inner pipe column, wherein the inner pipe column is coaxially positioned in the connecting pipe body, one end of the inner pipe column is inserted into the base and is communicated with the overflowing hole, the dissolving liquid flowing into the base from the inner pipe column can flow into the space between the outer pipe column and the well wall of the development well from the overflowing hole of the base, and the dissolving liquid is gradually filled in the space between the outer pipe column and the well wall of the development well. And the connecting pipe body of the outer pipe column comprises a sieve pipe, and a dry particle layer and a dissoluble pipe which are sequentially covered on the outer peripheral wall of the sieve pipe. The dissoluble pipe connected with the pipe body can be directly contacted with the dissolving liquid and dissolved and disappear by the dissolving liquid. After the dissolvable tube disappears, the dry particles in the dry particle layer expand when encountering water, gradually filling the space between the outer tubular column and the wall of the borehole of the development well. And finishing the sand control process of the well bore of the development well. The filling of the particles in the well hole of the development well can be completed by lowering the pipe column once, and the sand prevention process of the development well is simplified.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive efforts,
FIG. 1 is a schematic structural diagram of a development well completion string provided by an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an overflow plate provided in an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an inner tubular string provided by embodiments of the present disclosure;
fig. 4 is a schematic structural diagram of a sitting and hanging device provided by the embodiment of the disclosure;
fig. 5 is a schematic structural diagram of a releasing device provided in an embodiment of the present disclosure;
FIG. 6 is a flow chart of a method of completing a particle pack provided by an embodiment of the present disclosure;
FIG. 7 is a flow chart of another method of completing a particulate pack provided by an embodiment of the present disclosure;
fig. 8-10 are process schematic diagrams of a particulate packing completion method provided by an embodiment of the disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a particulate packing completion string provided by an embodiment of the present disclosure, and referring to fig. 1, the particulate packing completion string includes an outer string 1 and an
The
The outer wall of the outer pipe column 1 is hermetically fixed on the wall of the development well bore 100, the
And the
In one implementation provided by the present disclosure, the
Alternatively, the dry particulate can be a polyurethane polymer or an expanded polystyrene polymer.
When the dry particles are made of the above materials, the dry particles can have a better expansion rate, and can more effectively fill the space between the outer wall of the outer tubular column 1 and the wall of the development well
The average particle size of the dry particulate matter is 0.08 to 0.12mm, and the average particle size of the dry particulate matter after swelling with water is 0.43 to 0.86 mm. Can guarantee that the volume of outer tubular column 1 itself can not be too big the time, effectively play the sand control effect after the expansion of dry particulate matter.
Alternatively, the
The
Referring to fig. 1, the connecting
The connecting
It should be noted that each coupling joint 12a includes a
Illustratively, the
The arrangement of the
Alternatively, the
Optionally, the outer pipe column 1 may further include an
The setting of
Illustratively, the diameter of the water passing hole 131 may be 0.1-0.15 mm. The sand control effect is better.
In other implementations provided by the present disclosure, the aperture of the
Fig. 2 is a schematic structural view of an overflow plate according to an embodiment of the disclosure, and referring to fig. 2, the
Fig. 3 is a schematic structural diagram of the inner pipe string provided in the embodiment of the present disclosure, and referring to fig. 3, the
The second pipe joint 22 can be inserted into the
Alternatively, the first pipe joint 21 and the second pipe joint 22 may be connected by a screw thread a. The disassembly and assembly are convenient.
As can be seen with reference to fig. 1, the particle packed completion string further comprises a setting and hanging
Referring to fig. 1, the particle packed completion string may further include a
When the position needing particle filling is only located at the lower end of the
For ease of understanding, a schematic view of the sitting and hanging
Fig. 4 is a schematic structural diagram of a sitting and hanging device provided by an embodiment of the present disclosure, and referring to fig. 4, the sitting and hanging
During expansion construction, the
Fig. 5 is a schematic structural diagram of a releasing device provided in an embodiment of the present disclosure, and as can be seen from fig. 5, the releasing
After the releasing
It should be noted that the structure of the sitting and hanging
Fig. 6 is a flow chart of a particle-packed well completion method provided by an embodiment of the present disclosure, and referring to fig. 6, the particle-packed well completion method is implemented by using a particle-packed well completion string as described above, and the particle-packed well completion method includes:
s101: and (3) putting the particles down in the well bore of the development well to fill the well completion pipe column, wherein the volume of the dry particle layer is 0.2-0.3 times of the volume of the space between the outer peripheral wall of the dissoluble pipe and the well wall of the well bore of the development well.
S102: and introducing a dissolving solution into the inner pipe column of the particle filling completion pipe column, dissolving the soluble pipe of the outer pipe column by the dissolving solution, and expanding the dry particle layer to fill the space between the outer pipe column and the well wall of the well bore of the development well.
And sealing and fixing the outer wall of the first pipe column of the outer pipe column on the well wall of the well hole of the development well, and lowering the inner pipe column into the outer pipe column. And injecting the dissolving liquid from the inner pipe column, wherein the inner pipe column is coaxially positioned in the connecting pipe body, one end of the inner pipe column is inserted into the base and is communicated with the overflowing hole, the dissolving liquid flowing into the base from the inner pipe column can flow into the space between the outer pipe column and the well wall of the development well from the overflowing hole of the base, and the dissolving liquid is gradually filled in the space between the outer pipe column and the well wall of the development well. And the connecting pipe body of the outer pipe column comprises a sieve pipe, and a dry particle layer and a dissoluble pipe which are sequentially covered on the outer peripheral wall of the sieve pipe. The dissoluble pipe connected with the pipe body can be directly contacted with the dissolving liquid and dissolved and disappear by the dissolving liquid. The dry particulate matter in the dry particulate matter layer meets water swelling, and the volume of dry particulate matter layer is 0.2 ~ 0.3 times of the volume of the space between the wall of a well of the dissoluble pipe's periphery and development well borehole, and the dry particulate matter that has certain expansion ratio all can be full of the space between outer tubular column and the wall of a well of development well borehole after the inflation. And the sand prevention effect is ensured.
Fig. 7 is a flow chart of another method for completing a particle pack provided by an embodiment of the present disclosure, and referring to fig. 7, the method for completing a particle pack may include:
s201: and connecting the sieve tube and the soluble tube in the outer pipe column to the base of the outer pipe column, wherein the volume of the space between the sieve tube and the soluble tube of the outer pipe column is the filling volume. And compressing and filling dry particles between the sieve tube and the soluble tube, wherein the volume of the compressed and filled dry particles is 5-10 times of the filling volume, and forming a dry particle layer.
Before transferring particulate matter packing well completion tubular column, when forming dry particle layer, space compression packing volume between the screen pipe of outer tubular column on the base and the dissoluble pipe is 5 ~ 10 times packing volume's dry particulate matter, can guarantee that dry particulate matter itself also receives the compression, dissoluble pipe disappears after, the dry particulate matter that receives the compression itself also can expand, the water inflation's of stack dry particulate matter effect, dry particulate matter can be more compact with the space packing between the wall of a well of screen pipe and development well, sand control effect is improved.
After the dry particle layer is formed in the outer pipe string, the screen pipe, the dry particle layer, and the dissolvable pipe may be sealed and fixed using the safety joint.
Optionally, the step S201 of compressing and filling dry particles between the screen and the dissolvable tube of the outer tubular string may comprise:
uniformly placing the dry particles into a space between a sieve tube and a soluble tube of the outer pipe column; an annular plate is coaxially extended into the space between the screen and the dissolvable tube and pushed against the annular plate to compress the dry particulate matter. And repeatedly and uniformly placing the dry particles into the space between the sieve tube and the soluble pipe and compacting the dry particles by using the annular plate until the compressed dry particles are filled in the space between the sieve tube and the soluble pipe. Uniform compression packing of the dry particulate matter can be achieved.
S202: and (3) putting the particles down in the well bore of the development well to fill the well completion pipe column, wherein the volume of the dry particle layer is 0.2-0.3 times of the volume of the space between the outer peripheral wall of the dissoluble pipe and the well wall of the well bore of the development well.
In one implementation manner of the present disclosure, step S201 may include:
the lower pipe is connected with a releasing device, the releasing device is connected with a sitting and hanging device, and the sitting and hanging device is connected to one end of the outer pipe column. An outer tubular string is lowered to a target location within a borehole of the development well. The sitting and hanging device works to fix the outer pipe column with the outer wall of the well hole of the development well, and the releasing device is controlled to be disconnected with the sitting and hanging device.
Note that the volume of the dry particle layer is the volume of the annulus between the screen pipe and the dissolvable pipe. The volume of the space between the outer peripheral wall of the dissolvable tube and the wall of the well of the development well bore is obtained by subtracting the volume of the space enclosed by the outer peripheral wall of the dissolvable tube from the volume that the development well bore can accommodate.
S203: and introducing a dissolving solution into the inner pipe column of the particle filling completion pipe column, dissolving the soluble pipe of the outer pipe column by the dissolving solution, and expanding the dry particle layer to fill the space between the outer pipe column and the well wall of the well bore of the development well.
Optionally, introducing a solution into the inner tubular string of the completion string for particulate packing, comprising:
and introducing a dissolving solution into the inner tubular column of the particle filling completion tubular column, wherein the time for introducing the dissolving solution into the inner tubular column is 0.5-1 h.
The time for introducing the dissolving liquid into the inner pipe column is within the range, so that the dissolving liquid can be ensured to be filled in the space between the outer wall of the outer pipe column and the well wall of the well hole of the development well, the time for introducing the dissolving liquid is controlled, the consumption of the dissolving liquid can be reduced, and the cost required by the sand prevention process is reduced.
The structure of the insertion of the inner string into the outer string can be seen in fig. 8, from which fig. 8 it can be seen that the
Step S203 may further include:
introducing a dissolving solution for 0.5-1 h into an inner pipe column of the particle filling completion pipe column; and lifting the inner pipe column from the outer pipe column, and placing the solution in the well bore of the development well for 5-7 days until the dry particle layer is expanded and filled to the well wall of the well bore of the development well.
After a dissolving solution is introduced into an inner pipe column of the particle filling completion pipe column, the inner pipe column is firstly put forward, and time of 5-7 days is provided, so that the dissolving solution can fully react with the soluble pipe, and the dry particle layer has enough time to gradually expand until the space between the well bore of the development well and the outer wall of the outer pipe column is filled.
In one implementation provided by the present disclosure, the dissolvable tube is made of a rare earth doped magnesium aluminum alloy, and at this time, a dissolving solution containing chloride ions may be introduced into the inner tubular column of the particle-packed completion tubular column. Rapid dissolution of the dissolvable tube may be achieved.
Optionally, when the soluble tube is made of magnesium-aluminum alloy doped with rare earth elements, when the content of the rare earth elements in the magnesium-aluminum alloy is 0.3% -2.0%, the content of chloride ions in the solution can be 8000-.
In one implementation provided by the present disclosure, the dissolution solution can be a potassium chloride solution. In other implementations provided by the present disclosure, the dissolving solution may also be made of other materials, which the present disclosure does not limit.
In step S203, the dissolvable tube melts away, and the structure of the expanded dry particles is schematically shown in fig. 9, where fig. 9 shows that the
S204: and (4) putting the inner pipe column into the outer pipe column, and introducing clear water into the inner pipe column to replace the solution.
And continuously introducing clean water into the inner pipe column, wherein the clean water can flow to a space between the outer pipe column and the well hole of the development well, enters an annular space between the inner pipe column and the outer pipe column from the sieve tube and finally flows to the ground, and the solution between the outer pipe column and the well hole of the development well is replaced. And normal exploitation of a subsequent development well is ensured.
Step S203 may further include continuously introducing clean water into the inner pipe column for circulation by using the pump truck, and observing the pressure of the pump truck. If there is a significant increase in the pressure of the pump truck. It is judged that the particulate matter filling effect is good.
Referring to fig. 10, the
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited to the above embodiments, and various changes and modifications may be made by those skilled in the art without departing from the scope of the invention.
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