CN115163044A - A method and device for enhancing oil recovery by simultaneous injection and production of horizontal wells in tight oil reservoirs - Google Patents

Abstract

The invention discloses a method and a device for increasing recovery efficiency of a tight oil reservoir horizontal well by synchronous injection and production in the same well, wherein the method and the device comprise a bottom stretching-in component and at least one growth connecting component, the growth connecting component can be connected above the bottom stretching-in component so as to increase the total length, the device also comprises at least two clamping components used for assisting the growth connecting component to be installed on the bottom stretching-in component, and the clamping components are convenient for the growth connecting component to be installed on the clamping components on the bottom stretching-in component. According to the invention, the bottom-extending component and the at least one growth connecting component are arranged, so that a measuring instrument which is lowered into a drilled well can be protected, the bottom-extending component and the growth connecting component are convenient to mount and dismount, and the measuring instrument can enter or leave the drilled well more quickly, so that a corresponding measuring value can be obtained more quickly, and the recovery ratio is improved.

Description

A method and device for enhancing oil recovery by simultaneous injection and production of horizontal wells in tight oil reservoirs

technical field

The invention relates to the technical field of oil well exploration equipment, in particular to a method and a device for improving the recovery ratio by synchronous injection and production of horizontal wells in tight oil reservoirs.

Background technique

With the continuous deepening of oil exploration and the continuous development of drilling technology, logging is becoming more and more difficult. Therefore, it is necessary to minimize construction safety risks and improve logging timeliness, and also to collect formation information in time to meet the requirements of exploration and development. demand, and the method and device for improving oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir proposed in this application can solve this problem.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems mentioned in the background art, and propose a method and device for improving the recovery ratio by simultaneous injection and production of the same well in a horizontal well in a tight oil reservoir.

In order to achieve the above object, the present invention adopts the following technical solutions:

A method and a device for improving oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir, comprising a bottom extending component and at least one growth connecting component, wherein the growing connecting component can be connected above the bottom extending component, In order to further increase the overall length, the device further includes at least two snap-fit assemblies for assisting the installation of the increasing connecting assembly on the bottom extending assembly, and the snap-fitting assemblies facilitate the mounting of the growing connecting assembly on the The bottom extends into the snap-on assembly on the assembly.

Preferably, the bottom extending component includes a first cylinder, the first cylinder is a hollow structure, an outer wall of the first cylinder is provided with a first annular groove, and an inner wall of the first cylinder is provided with a first ring groove. Two first vertical grooves and one second annular groove are arranged in communication with the two first vertical grooves.

Preferably, the first cylinder is further provided with a first circular groove and two first limiting grooves, the first circular groove is slidably connected with a first circular rod, and one end of the first circular rod is fixedly connected with a A first connecting block, the first connecting block is adapted to the first vertical groove, and two sides of the first connecting block are fixedly connected with a first limiting block, and the first limiting block is connected with the first limit block. The first limiting groove is adapted to fit, the outer wall of the first round rod is sleeved with a first elastic piece, and the two ends of the first elastic piece are respectively connected with the first connecting block and the first vertical piece. The inner side walls of the straight grooves are connected, and one end of the first cylinder is fixedly connected with a disc.

Preferably, the growth connection assembly includes a second cylinder, the second cylinder is a hollow structure, the outer wall of the second cylinder is provided with a third annular groove, and the inner wall of the second cylinder is provided with a third ring groove. Two second vertical grooves and one fourth ring groove are arranged in communication with the two second vertical grooves.

Preferably, the second cylinder is further provided with a second circular groove and two second limiting grooves, the second circular groove is slidably connected with a second circular rod, and one end of the second circular rod is fixedly connected with a second circular rod. A second connecting block, the second connecting block is adapted to the second vertical groove, and two sides of the second connecting block are fixedly connected with a second limiting block, and the second limiting block is connected to The second limiting groove is adapted to fit, the outer wall of the second round rod is sleeved with a second elastic piece, and the two ends of the second elastic piece are respectively connected with the second connecting block and the second vertical piece. The inner side walls of the straight grooves are connected, one end of the second cylinder is fixedly connected with a ring body, and the outer wall of the ring body is fixedly connected with two mounting blocks.

Preferably, the snap-connection assembly includes a snap-fit ring, the outer wall of the snap-fit ring is fixedly connected with two connecting plates, the connecting plates are provided with slot holes, and the snap-on ring is provided with two sliding grooves, The chute is slidably connected with an arc-shaped block, the arc-shaped block is fixedly connected with a transverse rod, the other end of the transverse rod is fixedly connected with a plate body, and the outer wall of the transverse rod is sleeved with a third elastic member, so the Both ends of the third elastic member are respectively connected with the chute and the plate body.

A method for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir, the specific steps of the method are:

S1: During logging, use the hoisting and ropes on the drilling platform to lock the two connecting plates in one of the clamping assemblies, and let the clamping ring in the clamping assembly clamp the first cylinder, so that the first cylinder is located on the drilling platform and corresponds to the measured wellhead, but does not enter the measured wellhead;

S2: place the measuring instrument in the first cylinder;

S3: Remove the hoisting and rope used with the first cylinder, and lock the hoisting and rope to the two connecting plates in the other snap-on assembly, so that the snap ring in the snap-on assembly can clamp the second cylinder, placing the second cylinder on the first cylinder, and rotating the second cylinder, so that the second cylinder is connected with the first cylinder;

S4: Make the total length of the bottom protruding component and the growth connecting component larger than the measuring instrument.

Compared with the prior art, the beneficial effects of the present invention are:

By arranging the bottom insertion assembly and the at least one extension connection assembly, the present invention can protect the measuring instrument running into the well, and the installation and disassembly between the bottom insertion assembly and the extension connection assembly are convenient, so that the measurement instrument can be entered or removed more quickly. Get out of the drilling hole to get the corresponding measurements faster, thereby increasing the recovery factor.

Description of drawings

Fig. 1 is a kind of method and the structure schematic diagram of the bottom projecting component in the device proposed by the present invention for simultaneous injection and production in the same well of a tight oil reservoir horizontal well;

Fig. 2 is the exploded schematic diagram of the cut-away structure of Fig. 1;

Fig. 3 is the enlarged structure schematic diagram of A place in Fig. 2;

FIG. 4 is a schematic structural diagram of one of the growth connecting components in the method and device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir proposed by the present invention;

5 is a schematic exploded view of the cutaway structure of FIG. 4;

Fig. 6 is the enlarged structure schematic diagram of B place in Fig. 5;

7 is a schematic structural diagram of a clamping component in a method and a device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir proposed by the present invention;

FIG. 8 is an exploded schematic view of the cutaway structure of FIG. 7 .

In the picture:

10, the first cylinder; 11, the first ring groove; 12, the first vertical groove; 13, the second ring groove; 14, the first circular groove; 15, the first limit groove; 16, the first round rod ; 17, the first connecting block; 18, the first limit block; 19, the first elastic member; 110, the disc;

20, the second cylinder; 21, the third ring groove; 22, the second vertical groove; 23, the fourth ring groove; 24, the second round groove; 25, the second limit groove; 26, the second round rod 27, the second connecting block; 28, the second limit block; 29, the second elastic member; 210, the ring body; 211, the installation block;

30, snap ring; 31, connecting plate; 32, slot hole; 33, chute; 34, arc block; 35, cross bar; 36, plate body; 37, third elastic piece.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the orientations shown in the accompanying drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "provided with", "sleeve/connection", "connection", etc., should be understood in a broad sense, such as " Connection", which can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two components. of connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1 to 8, a method and device for enhanced oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir, including a bottom protruding component and at least one growth connecting component, the growth connecting component can be connected to the bottom protruding component Above the assembly, thereby increasing the overall length, the device further includes at least two snap-fit assemblies for assisting the installation of the growth connecting assembly on the bottom protruding assembly, and the snap-on assemblies facilitate the installation of the growing connecting assembly on the bottom protruding assembly. .

The length of the measuring instrument is long, and a structure to protect the measuring instrument is required and can be run into the well together with the measuring instrument;

The structure for protecting the measuring instrument is formed by the bottom protruding component and the extension connecting component. In addition, by increasing the number of the extension connecting components, the total length of the structure constituting the protecting measuring instrument can be increased.

Further, the bottom extending component includes a first cylinder 10, the first cylinder 10 is a hollow structure, the outer wall of the first cylinder 10 is provided with a first annular groove 11, and the inner wall of the first cylinder 10 is provided with two first ring grooves 11. A vertical groove 12 and a second annular groove 13 are arranged in communication with the two first vertical grooves 12 .

Further, the first cylinder 10 is also provided with a first circular groove 14 and two first limiting grooves 15, the first circular groove 14 is slidably connected with a first circular rod 16, and one end of the first circular rod 16 is fixedly connected with a The first connecting block 17, the first connecting block 17 is adapted to the first vertical groove 12, the two sides of the first connecting block 17 are fixedly connected with a first limiting block 18, and the first limiting block 18 is connected with the first limiting block 18. The limit groove 15 is adapted to fit, the outer wall of the first round rod 16 is sleeved with a first elastic member 19, and the two ends of the first elastic member 19 are respectively connected with the first connecting block 17 and the inner side wall of the first vertical groove 12. One end of the first cylinder 10 is fixedly connected with a disk 110 .

Wherein, the first elastic member 19 is preferably a spring fitting, which can push the first connecting block 17 to a direction away from the first circular groove 14;

The arrangement of the first limiting groove 15 and the first limiting block 18 can make the first connecting block 17 stay at the fixed position in the first vertical groove 12 stably;

The depth of the first circular groove 14 is greater than the length of the first circular rod 16 .

Further, the growth connection assembly includes a second cylinder 20 , the second cylinder 20 is a hollow structure, the outer wall of the second cylinder 20 is provided with a third annular groove 21 , and the inner wall of the second cylinder 20 is provided with two first ring grooves 21 . Two vertical grooves 22 and one fourth annular groove 23 , and the fourth annular groove 23 is communicated with the two second vertical grooves 22 .

Further, the second cylinder 20 is also provided with a second circular groove 24 and two second limiting grooves 25, the second circular groove 24 is slidably connected with a second circular rod 26, and one end of the second circular rod 26 is fixedly connected with a The second connecting block 27, the second connecting block 27 is adapted to the second vertical groove 22, the two sides of the second connecting block 27 are fixedly connected with the second limiting block 28, and the second limiting block 28 is connected with the second limiting block 28. The limit slot 25 is adapted to fit, the outer wall of the second round rod 26 is sleeved with a second elastic member 29, and the two ends of the second elastic member 29 are respectively connected with the second connecting block 27 and the inner side wall of the second vertical groove 22. A ring body 210 is fixedly connected to one end of the second cylinder 20 , and two mounting blocks 211 are fixedly connected to the outer wall of the ring body 210 .

Wherein, the second elastic member 29 is preferably a spring fitting, which can push the second connecting block 27 to a direction away from the second circular groove 24;

The arrangement of the second limit groove 25 and the second limit block 28 can make the second connection block 27 stay at the fixed position in the second vertical groove 22 stably;

The depth of the second circular groove 24 is greater than the length of the second circular rod 26 .

Further, the clamping assembly includes a clamping ring 30 , two connecting plates 31 are fixedly connected to the outer wall of the clamping ring 30 , the connecting plate 31 is provided with a slot 32 , and the clamping ring 30 is provided with two sliding grooves 33 . The slot 33 is slidably connected with an arc block 34, the arc block 34 is fixedly connected with a cross bar 35, the other end of the cross bar 35 is fixedly connected with a plate body 36, the outer wall of the cross bar 35 is sleeved with a third elastic member 37, the third Two ends of the elastic member 37 are respectively connected with the chute 33 and the plate body 36 .

Wherein, the third elastic member 37 is preferably a spring fitting, which can make the plate body 36 closely adhere to the outer wall of the snap ring 30;

Pull the plate body 36 so that the arc-shaped block 34 enters the corresponding chute 33, and the third elastic member 37 is compressed. At this time, the snap ring 30 is sleeved on the first cylinder 10 or the second cylinder 20, Then, the plate body 36 is released, and under the elastic force of the third elastic member 37, the arc-shaped block 34 presses the outer wall of the first cylinder 10 or the second cylinder 20, and moves the snap ring 30, so that the arc-shaped block 34 It is clamped at the first ring groove 11 or the third ring groove 21 to realize the clamping operation.

A method for improving oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir, characterized in that the specific steps of the method are:

S1: During logging, use the hoisting and ropes on the drilling platform to lock the two connecting plates 31 in one of the clamping assemblies, and let the clamping rings 30 in the clamping assembly clamp the first cylinder 10, so that the first cylinder 10 is locked. A cylinder 10 is located on the drilling platform and corresponds to the measured wellhead, but does not enter the measured wellhead;

S2: place the measuring instrument in the first cylinder 10;

S3: Remove the hoisting device and the rope used with the first cylinder 10, and lock the hoisting device and the rope to the two connecting plates 31 in the other clamping assembly, so that the clamping ring 30 in the clamping assembly can clamp the second cylinder 20, so that the second cylinder 20 is placed on the first cylinder 10, and the second cylinder 20 is rotated, so that the second cylinder 20 is connected with the first cylinder 10;

S4: Make the total length of the bottom protruding component and the growth connecting component larger than the measuring instrument.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (7)

1. A device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir, characterized in that it comprises a bottom extension component and at least one growth connection component, and the growth connection component can be connected to the bottom extension component. The device further includes at least two snap-fit assemblies for assisting the installation of the extension connecting assembly on the bottom extending assembly, and the snap-fit assemblies facilitate the extension connecting assembly A snap-fit assembly mounted on the bottom protruding assembly. 2. A device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir according to claim 1, characterized in that, the bottom projecting component comprises a first cylinder (10), and the first A cylinder (10) is a hollow structure, the outer wall of the first cylinder (10) is provided with a first annular groove (11), and the inner wall of the first cylinder (10) is provided with two first vertical A groove (12) and a second annular groove (13) are provided in communication with the two first vertical grooves (12). 3. A device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir according to claim 2, wherein the first cylinder (10) is further provided with a first circular groove (14). ) and two first limiting grooves (15), the first circular grooves (14) are slidably connected with a first circular rod (16), and one end of the first circular rod (16) is fixedly connected with a first connection A block (17), the first connecting block (17) is adapted to the first vertical groove (12), and the two sides of the first connecting block (17) are fixedly connected with first limiting blocks (18), the first limit block (18) is adapted to the first limit groove (15), and the outer wall of the first round rod (16) is sleeved with a first elastic member (19) , the two ends of the first elastic member (19) are respectively connected with the first connecting block (17) and the inner wall of the first vertical groove (12), and one end of the first cylinder (10) A disc (110) is fixedly attached. 4. A device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir according to claim 1, wherein the growth connecting component comprises a second cylinder (20), and the first The second cylinder (20) is a hollow structure, the outer wall of the second cylinder (20) is provided with a third annular groove (21), and the inner wall of the second cylinder (20) is provided with two second vertical grooves (21). A groove (22) and a fourth annular groove (23), the fourth annular groove (23) is communicated with the two second vertical grooves (22). 5. The device for enhancing oil recovery by simultaneous injection and production of a horizontal well in a tight oil reservoir according to claim 4, wherein the second cylinder (20) is further provided with a second circular groove (24). ) and two second limiting grooves (25), the second circular grooves (24) are slidably connected with a second circular rod (26), and one end of the second circular rod (26) is fixedly connected with a second connection A block (27), the second connecting block (27) is adapted to the second vertical groove (22), and a second limiting block is fixedly connected to both sides of the second connecting block (27). (28), the second limit block (28) is adapted to the second limit groove (25), and the outer wall of the second round rod (26) is sleeved with a second elastic member (29) , the two ends of the second elastic member (29) are respectively connected with the second connecting block (27) and the inner side wall of the second vertical groove (22), and one end of the second cylinder (20) A ring body (210) is fixedly connected, and two mounting blocks (211) are fixedly connected to the outer wall of the ring body (210). 6 . The device for enhancing oil recovery by simultaneous injection and production of horizontal wells in tight oil reservoirs according to claim 1 , wherein the clamping assembly comprises a clamping ring ( 30 ), and the clamping The outer wall of the ring (30) is fixedly connected with two connecting plates (31), the connecting plates (31) are provided with slot holes (32), and the snap ring (30) is provided with two sliding grooves (33), An arc-shaped block (34) is slidably connected to the chute (33), a cross-bar (35) is fixedly connected to the arc-shaped block (34), and a plate body (35) is fixedly connected to the other end of the cross-bar (35). 36), the outer wall of the cross bar (35) is sleeved with a third elastic member (37), and the two ends of the third elastic member (37) are respectively connected to the chute (33) and the plate body (36). 36) Connect. 7. A method for enhancing oil recovery by simultaneous injection and production in the same well of a horizontal well in a tight oil reservoir, wherein the specific steps of the method are: S1: during well logging, utilize hoisting and ropes on the drilling platform to lock the The two connecting plates (31) in a snap-fit assembly allow the snap-on ring (30) in the snap-fit assembly to hold the first cylinder (10), so that the first cylinder (10) is located on the drilling platform, and Corresponds to the measured wellhead, but does not enter the measured wellhead; S2: place the measuring instrument in the first cylinder (10); S3: remove the hoisting and ropes used with the first cylinder (10), and place the hoisting and The ropes are used to lock the two connecting plates (31) in the other clamping assembly, so that the clamping ring (30) in the clamping assembly is clamped to the second cylinder (20), so that the second cylinder (20) is placed on the first cylinder (10), and rotate the second cylinder (20), so that the second cylinder (20) is connected with the first cylinder (10); S4: make the bottom extend into the assembly and grow the connecting assembly The overall length is greater than the measuring instrument.

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