CN113187469B - Method for establishing communication connection between upper completion string and lower completion string - Google Patents
Method for establishing communication connection between upper completion string and lower completion string Download PDFInfo
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- CN113187469B CN113187469B CN202110503230.XA CN202110503230A CN113187469B CN 113187469 B CN113187469 B CN 113187469B CN 202110503230 A CN202110503230 A CN 202110503230A CN 113187469 B CN113187469 B CN 113187469B
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- 238000004891 communication Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000004576 sand Substances 0.000 claims abstract description 97
- 238000004519 manufacturing process Methods 0.000 claims abstract description 45
- 230000008859 change Effects 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims description 69
- 230000009471 action Effects 0.000 claims description 18
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 14
- 238000004080 punching Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 5
- 150000004677 hydrates Chemical class 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 claims 1
- 238000005056 compaction Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 4
- 241001331845 Equus asinus x caballus Species 0.000 description 8
- 230000006698 induction Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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Abstract
The invention discloses a method for establishing communication connection between an upper completion string and a lower completion string, which comprises the following steps: connecting the sand control screen pipe to the lower end of the connecting assembly, and setting the sand control screen pipe at a designed position in a well; the upper well completion pipe column is put in, the oil pipe is righted and guided into the sand control screen pipe, a positioning key on the sand control screen pipe is contacted with a single-action directional plug-in type communication assembly arranged on the upper well completion pipe column, the positioning key slides upwards along the bevel opening guide shoe guide spiral bevel, the single-action directional plug-in type communication assembly is rotated, the pipe column is continuously put down, and the wet joint protection directional front end on the connecting assembly is inserted into a groove on the connecting assembly; and carrying out pressure reduction pilot production operation, and measuring the pressure in the inner cavity and the radial compressive stress change of the reservoir hydrate to the sand control screen pipe through the measuring unit. The invention realizes the method for establishing the communication connection between the upper well completion and the lower well completion, and can monitor the compaction and settlement effects of the hydrate in the depressurization pilot production process in real time through the sand control screen pipe.
Description
Technical Field
The invention relates to the technical field of hydrate pilot production measuring devices, in particular to a method for establishing communication connection between an upper well completion pipe column and a lower well completion pipe column.
Background
The depressurization trial production method is considered to be the mainstream technology of hydrate trial production, but in the depressurization trial production process, reservoir compaction and settlement can occur in a production well. For example, in the trial production in the sea area of the sea chest of south Japan, the measurement of the deformation of the sea bottom in a certain year proves that the top of the production well is settled in the order of centimeters after the pressure reduction trial production for a plurality of days, and a large amount of sand is produced in the trial production process.
Compared with the gas production application of the conventional oil and gas well, the service life of the sand control screen pipe applied to trial production of hydrate in the sea is far short of the original normal life cycle. Different from the conventional oil gas, the reservoir layer can generate a settlement compaction effect in the process of reducing pressure, trial production and gas production of the marine hydrate sedimentary deposit, so that settlement compaction stress is generated. This settling compaction stress can create frictional stresses between the production casing and the contact layer. Due to the sedimentation and compaction of the reservoir, the casing shoe in the pilot production equipment is vertically stretched downwards, so that tensile stress is generated inside and around the casing shoe. Therefore, in the hydrate depressurization pilot production process, the influence of the compaction and sedimentation of the reservoir on the sand control screen pipe in the pilot production process is monitored in real time, and long-term safe pilot production is realized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for establishing communication connection between an upper completion pipe column and a lower completion pipe column, which can realize signal communication in the pilot production operation process and measure the longitudinal settlement stress and radial compressive stress change acting on a sand control screen pipe in the pressure reduction pilot production process of reservoir hydrates in real time.
The technical scheme for realizing the purpose of the invention is as follows: a method of establishing a communicative coupling between an upper completion string and a lower completion string, the upper and lower completion strings being mounted within a casing, the upper completion string being positioned at an upper end of the lower completion string, the upper completion string including a single-action directional stab-type communication assembly, an oil pipe, the lower completion string including a connection assembly, a sand screen, and a measurement unit, comprising the steps of:
step 1: sequentially assembling a sand control screen pipe of a lower well completion pipe column and a connecting assembly with an inner cavity body at a ground wellhead, entering a well, injecting a proper amount of hydraulic oil into the inner cavity body so that the pressure in the inner cavity body reaches a preset pressure value, enabling the connecting assembly to bear the weight of the sand control screen pipe connected with the lower part of the connecting assembly, and continuing to enter the lower well completion pipe column to a designed underground position for setting;
step 2: sequentially assembling an upper well completion pipe column at a ground well mouth into a well, lowering the upper well completion pipe column to a fixed designed depth until the upper well completion pipe column is suspended and fixed at the well mouth, stopping lowering the upper well completion pipe column, wherein in the lowering process, a telescopic oil pipe of the upper well completion pipe column is in a free expansion state under the action of gravity of the upper well completion pipe column at the lower end so as to balance the lowering length metering error and the construction error of the upper well completion pipe column, thereby fully ensuring the lowering length of the upper well completion pipe column, further leading the bottom surface of a directional insertion righting part to be in contact with the top surface of a sand control screen packer, and recovering a part of the stroke of the telescopic oil pipe after the top surface of the sand control screen packer bears the weight of the upper well completion pipe column at the lower end of the telescopic oil pipe; thereby ensuring that a positioning key of the connecting assembly is contacted with a single-action directional plug-in type communication assembly on the upper well completion pipe column, the positioning key is fixedly arranged on the connecting assembly, the bevel opening guide shoe guide spiral inclined plane slides downwards along the positioning key, and the single-action directional plug-in type communication assembly is rotated, so that a bevel opening guide shoe key groove on the bevel opening guide shoe guide spiral inclined plane is driven to align to the positioning key, the upper well completion pipe column is continuously lowered, and the bevel opening guide shoe key groove is sleeved in the positioning key, so that preliminary orientation is realized; ensuring that the front end of a wet joint protection orientation on the connecting assembly is inserted into a groove on the connecting assembly to realize secondary accurate positioning and fixing, and then continuing to put down the upper well completion pipe column until the male end of the wet plug is inserted into the female end of the wet plug to realize the communication connection of either a first signal path or a second signal path with a communication device, wherein the first signal path is a signal path formed by directly connecting a first signal pipeline to a ground well head, and the second signal path is a signal path formed by connecting the first signal pipeline with the ground well head through the pump working condition of an electric submersible pump and a power supply cable, so that the signal butt connection between the upper well completion pipe column and the lower well completion pipe column is realized and communicated with the ground well head, and the communication of measurement signals is realized;
and step 3: and carrying out depressurization pilot production operation, measuring the pressure in the inner cavity through the measuring unit, wherein the pressure change in the inner cavity reflects the longitudinal settlement stress change of the reservoir hydrate to the sand control screen pipe caused by the pilot production operation, monitoring in real time through the measuring unit to obtain the radial compressive stress change of the reservoir hydrate to the sand control screen pipe caused by the pilot production operation, and transmitting the measured longitudinal settlement stress and radial compressive stress data through the first signal path or the second signal path.
Furthermore, the single-action directional plug-in type communication assembly is inserted and clamped at a corresponding position of the connecting assembly in a directional manner, a single-action device and a communication device are arranged on the single-action directional plug-in type communication assembly, the single-action device is fixedly sleeved on the oil pipe along the axial direction in a limiting manner, the single-action device is used for maintaining the oil pipe not to rotate along with the single-action directional plug-in type communication assembly when the single-action directional plug-in type communication assembly rotates,
the lower end of the connecting component is integrally put into the well after the sand control screen pipe is connected with the well mouth, the sand control screen pipe is arranged along the axial direction of the sleeve, an inner cavity body is arranged between the sand control screen pipe and the connecting component, a one-way valve punching opening for pumping hydraulic oil into the inner cavity body is arranged on the connecting component, the one-way valve punching opening is communicated and connected with the inner cavity body,
the measuring unit is arranged on the sand control screen pipe, is connected with the communication device and is used for measuring the longitudinal settlement stress and the radial compressive stress of the reservoir hydrate on the sand control screen pipe in the pilot production process,
the single-action device is provided with a wet joint protection directional front end which is positioned at the lower end of the single-action device and extends downwards towards the connecting component, the wet joint protection directional front end is used for being inserted into the corresponding position of the connecting component, so that a wet plug is accurately inserted, the extension length of the protection directional front end is greater than that of the wet plug, and extrusion damage caused by the joint contact of the wet plug and the top surface of the sand control screen packer when orientation fails is avoided,
and during the lowering process of the upper completion string, the oil pipe which penetrates out of the single-action directional plug-in type communication assembly penetrates through the connecting assembly from top to bottom and then extends into the sand control screen pipe.
Further, coupling assembling includes sand control screen pipe packer, and sand control screen pipe packer up end is equipped with the recess with wet joint protection directional front end adaptation, and wet joint protection directional front end inserts in the recess to make the bayonet communication subassembly of single action orientation block firmly on coupling assembling.
Furthermore, the sand control screen pipe packer up end is provided with wet plug female end, still is provided with directional insert righting portion on the single action device, and the wet joint of lower extreme fixed connection at directional insert righting position, directional insert righting portion bottom be provided with the wet plug male end of wet plug female end looks adaptation, wet plug male end is used for inserting in the wet plug female end.
Further, still be provided with bevel connection guide spiral inclined plane and bevel connection guide keyway on the single action device, bevel connection guide keyway is installed in the upper end on bevel connection guide spiral inclined plane and is connected with bevel connection guide spiral inclined plane, bevel connection guide spiral inclined plane is located the oil pipe and extends the setting along the axial direction of oil pipe, bevel connection guide spiral inclined plane cooperatees with coupling assembling's navigation key, bevel connection guide spiral inclined plane is located the navigation key top, when bevel connection guide spiral inclined plane lapse to with the navigation key contact, can make bevel connection guide keyway aim at the navigation key, so that single action directional plug-in communication subassembly accomplishes preliminary directional connection with coupling assembling.
Furthermore, the measuring unit comprises an induction instrument, the induction instrument is arranged in the connecting assembly and is used for measuring the pressure in the inner cavity, the pressure reflects the longitudinal settlement stress of the reservoir hydrate on the sand control screen pipe in the pilot production process, the induction instrument is connected with the communication device through a first signal pipeline and a second signal pipeline in sequence,
the second signal pipeline is located the coupling assembling, and first signal pipeline passes wet male end of plug and wet female end back and is connected with the second signal pipeline that is located the coupling assembling.
Further, the pressure in the cavity is measured through getting pressure pipeline to the response instrument, gets pressure pipeline and installs on coupling assembling and be connected with interior cavity intercommunication.
Furthermore, the measuring unit comprises a radial compressive stress measuring device, the radial compressive stress measuring device is used for measuring the radial compressive stress of the reservoir hydrate acting on the sand control screen pipe in the pilot production process, the radial compressive stress measuring device is installed at the lower end of the sand control screen pipe and transversely arranged and can be in direct contact with the external reservoir hydrate, the radial compressive stress measuring device is connected with the first signal pipeline through a third signal pipeline, and the third signal pipeline extends to the sand control screen pipe from the connecting assembly and is connected with the radial compressive stress measuring device.
Furthermore, the sand control screen pipe is fixedly connected with the connecting assembly through a piston, the piston is installed at the upper end of the sand control screen pipe, the inner cavity is formed between the piston and the connecting assembly, and the one-way valve communicated and connected with the inner cavity is installed on the connecting assembly.
Furthermore, the single-action device comprises a mandrel, a bearing sleeve, a first bearing and a second bearing, wherein two ends of the mandrel are respectively fixedly connected with the punching oil pipe and the oil pipe, the bearing sleeve is sleeved on the mandrel and the oil pipe, and the single-action device is axially and fixedly installed on the mandrel through the first bearing and the second bearing in a limiting mode to realize single-action connection.
The invention has the beneficial effects that: the invention provides a method for establishing communication connection between an upper completion pipe column and a lower completion pipe column, which can realize signal communication in the pilot production operation process and measure the longitudinal settlement stress and radial compressive stress change acting on a sand control screen pipe in the pressure reduction pilot production process of reservoir hydrates in real time.
Drawings
FIG. 1 is a schematic diagram of a measurement unit including a sensing instrument;
FIG. 2 is a schematic structural diagram of a measuring unit including a radial compressive stress measuring device;
FIG. 3 is a schematic structural diagram of a measuring unit including an induction instrument and a radial compressive stress measuring device;
fig. 4 is a left side view of a partial area of fig. 1-3 including a beveled starter guide spiral bevel.
In the figure, 101-gas pipeline oil pipe, 102-water pipeline oil pipe, 103-telescopic oil pipe, 104-perforated oil pipe, 105-oil pipe, 20-electric submersible pump, 201-pump working condition, 301-mandrel, 302-first bearing, 303-second bearing, 304-bearing sleeve, 3041-directional insertion centralizing part, 3042-wet joint protection directional front end, 3043-oblique mouth guide shoe key groove, 3044-oblique mouth guide shoe guide spiral inclined plane, 401-first signal pipeline, 402-wet plug male end, 501-sand control screen pipe packer, 502-positioning key, 503-slip and packing rubber, 601-wet plug female end, 602-second signal pipeline, 603-induction instrument, 604-pressure taking pipeline, 605-piston, 606-first sealing ring, 607-inner cavity body, 608-second sealing ring, 609-one-way valve punching port, 701-perforated base pipe, 702-sand control medium, 703-sand control screen pipe shoe, 801-third signal pipeline and 802-radial compressive stress measuring device.
Detailed Description
The invention is further described with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1-4, a method for establishing a communication connection between an upper completion string and a lower completion string, the upper completion string and the lower completion string are installed in a casing, the upper completion string is located at the upper end of the lower completion string, the upper completion string comprises a single-action directional plug-in communication assembly, an oil pipe 105, an electric submersible pump 20, a gas pipeline 101, a water pipeline 102, a telescopic oil pipe 103 and a perforating oil pipe 104, the lower completion string comprises a connection assembly, a sand control screen and a measurement unit, and the oil pipe 105 sequentially penetrates through the single-action directional plug-in communication assembly and the connection assembly from top to bottom and then extends into the sand control screen.
The single-action directional plug-in type communication assembly is directionally plugged into the corresponding position at the upper end of the connecting assembly, so that the single-action directional plug-in type communication assembly is connected with the connecting assembly in a quick clamping manner. The directional plug-in communication assembly is provided with a single-acting device and a communication device, the single-acting device is axially limited and fixedly sleeved on the oil pipe 105 through a bearing, and the single-acting device is used for maintaining the oil pipe 105 to be fixed without rotating along with the directional plug-in communication assembly when the single-acting directional plug-in communication assembly rotates.
The single-action device comprises a mandrel 301, a bearing sleeve 304, a first bearing 302 and a second bearing 303, wherein the mandrel 301 is installed in the bearing sleeve 304, the upper end (the end close to the gas path oil pipe 101) of the mandrel 301 is connected with the perforated oil pipe 104, the lower end (the end far away from the gas path oil pipe 101) of the mandrel 301 is connected with the oil pipe 105, and the bearing sleeve 304 is sleeved on the mandrel 301 and the oil pipe 105. The first bearing 302 and the second bearing 303 sleeved in the bearing sleeve 304 are used for realizing that the oil pipe 105 is fixedly installed on the single-action device along the axial direction in a limiting manner, so that the single-action connection is realized, namely the single-action connection is realized by fixedly installing the first bearing 302 and the second bearing 303 on the mandrel 301 along the axial direction in a limiting manner. Mandrel 301 is used to maintain oil pipe 105 stationary without following rotation of bearing housing 304. bearing housing 304 is rotatable relative to mandrel 301 by first bearing 302 and second bearing 303 such that oil pipe 105 remains stationary when the single-action directional plug-in communication assembly is rotated by the single-action device.
The bearing sleeve 304 includes a directional insertion righting portion 3041, a wet joint protection directional front end 3042, an oblique-mouth guide shoe guide spiral inclined surface 3044 and an oblique-mouth guide shoe key groove 3043, the oblique-mouth guide shoe key groove 3043 is installed at the upper end of the oblique-mouth guide shoe guide spiral inclined surface 3044 and is connected with the oblique-mouth guide shoe guide spiral inclined surface 3044, the oblique-mouth guide shoe guide spiral inclined surface 3044 is located in the oil pipe 105 and extends along the axial direction of the oil pipe 105, that is, the oblique-mouth guide shoe guide spiral inclined surface 3044 and the oblique-mouth guide shoe key groove 3043 are both sleeved on the oil pipe 105 and are arranged along the axial direction of the oil pipe 105. The mandrel 301 is located within the directional insert centralizing portion 3041, the wet splice protection directional front end 3042 is fixedly mounted at the lower end of the directional insert centralizing portion 3041, and the wet splice protection directional front end 3042 is inserted into a corresponding location of the connection assembly, thereby enabling the single action directional insert communications assembly to be quickly connected with the connection assembly. Thereby realizing that the single-action device is sleeved on the oil pipe 105 through the bearing.
After the connecting assembly is lowered into the well from the upper completion pipe column, the lower end of the connecting assembly is connected with the sand control screen pipe, and the measuring unit is installed on the sand control screen pipe. Because the wet joint protection directional front end 3042 is connected with the connection assembly, when the single action directional stinger communication assembly is rotated, the sand control screen and the measurement units on the sand control screen rotate synchronously with the single action directional stinger communication assembly and the oil pipe 105 remains fixed and does not rotate. Wherein, in the actual use process of going into the well, the lower extreme of coupling assembling is at well head connected mode screen pipe, then wholly goes into the well again.
The connecting assembly comprises a sand control screen packer 501, a positioning key 502 and a slip and packing rubber 503, a groove matched with a wet joint protection directional front end 3042 is dug in one side of the upper end of the sand control screen packer 501, and the wet joint protection directional front end 3042 can be just inserted into the groove, so that the single-action directional plug-in type communication assembly can be firmly clamped on the connecting assembly, and the connection between the single-action directional plug-in type communication assembly and the connecting assembly is firm. The other side of the upper end of the sand control screen packer 501 is provided with a wet plug female end 601, and the directional insert centralizing part 3041 is provided with a wet plug male end 402 matched with the wet plug female end 601. The wet male plug end 402 is quickly insertable into the wet female plug end 601 to allow the single action directional plug-in communication module to be directionally and quickly snapped onto the connection module to complete the connection therebetween.
Wherein, navigation key 502 is mounted on oil pipe 105, at the lower part of oil pipe 105. The slant entry guide spiral inclined surface 3044 is also installed on the oil pipe 105 and is located on the upper portion of the oil pipe 105, that is, the slant entry guide spiral inclined surface 3044 is located above the position key 502, and the slant entry guide spiral inclined surface 3044 coincides with the central axis of the position key 502.
The mule guide spiral ramp 3044 may slide over the alignment key 502 to enable the mule guide spiral ramp 3044 to align with the alignment key 502 during sliding. When the mule guide spiral ramp 3044 slides down into contact with the navigation key 502, the mule guide spiral ramp 3044 slides down on the navigation key 502 under the weight of the oil pipe 105 itself and the weight of other components at the upper end connected to the oil pipe 105, thereby aligning the mule guide keyway 3043 with the navigation key 502. When the oil pipe 105 is lowered continuously, the bevel-mouth guiding shoe keyway 3043 is sleeved on the positioning key 502 to complete the preliminary orientation, so that the single-action directional plug-in communication assembly can be quickly inserted and clamped on the connecting assembly, specifically, the wet plug male end 402 can be quickly inserted into the wet plug female end 601, and the wet plug protection directional front end 3042 can be quickly inserted into the groove of the connecting assembly to complete the precise positioning, connecting and fixing of the single-action directional plug-in communication assembly and the connecting assembly.
The sand control screen pipe is fixedly arranged at the lower end of the connecting component and arranged along the axial direction of the sleeve. The sand control screen pipe is fixedly connected with the connecting assembly through a piston 605, the piston 605 is installed at the upper end of the sand control screen pipe, an inner cavity 607 is arranged between the piston 605 and the connecting assembly, the inner cavity 607 is communicated and connected with a one-way valve punching hole 609, and the one-way valve punching hole 609 is installed on the connecting assembly. The check valve punching hole 609 is used for pumping hydraulic oil into the inner cavity 607, the pumping amount of the hydraulic oil is sensed according to the preset pressure in the inner cavity 607, and the pumping of the hydraulic oil is stopped when the preset pressure in the inner cavity 607 is reached.
The measuring unit comprises an induction instrument 603 and/or a radial compressive stress measuring device 802, the induction instrument 603 is installed in the connecting assembly or in the sand control screen pipe or on other components, the radial compressive stress measuring device 802 is installed at the lower end of the sand control screen pipe and is transversely arranged, and the radial compressive stress measuring device 802 can be in direct contact with an external reservoir. The sensing instrument 603 is used for measuring the pressure in the inner cavity 607, that is, measuring the oil pressure change in the inner cavity 607, so as to detect the pressure change in the inner cavity 607 in real time. The radial compressive stress measuring device 802 is used for measuring the radial compressive stress of the hydrate reservoir under the action of compaction and sedimentation on the sand control screen pipe, so that the change condition of the radial compressive stress of the sand control screen pipe can be monitored in real time. The pressure-taking pipe 604 is installed on the connecting assembly and is connected with the inner cavity 607 in a communicating manner, and the sensing instrument 603 can measure the pressure change condition in the inner cavity 607 through the pressure-taking pipe 604. The sensing instrument 603 is electrically connected to the first signal line 401 through the second signal line 602, and the first signal line 401 is connected to the communication device. The measurement data measured by the radial compressive stress measuring device 802 passes through the second signal line 602 and the first signal line 401, and is then transmitted to the communication device, which then sends the measurement data to an external device.
The sand control screen pipe comprises a perforated base pipe 701, a sand control medium 702 and a sand control screen pipe shoe 703, wherein the sand control screen pipe shoe 703 is fixedly installed at the lower end of the perforated base pipe 701, the perforated base pipe 701 is filled with the sand control medium 702 for sand control, and the sand control medium 702 can prevent external reservoir hydrates and other sand bodies from entering the perforated base pipe 701, so that the external reservoir hydrates and other sand bodies are prevented from entering the sand control screen pipe, and a sand control effect is achieved. A radial compressive stress measuring device 802 may be mounted on perforated base pipe 701.
The first signal line 401 passes through the wet plug male end 402 and the wet plug female end 601 and then is connected with a second signal line 602 in the connection assembly, the second signal line 602 is connected with the sensing instrument 603, the second signal line 602 is connected with a third signal line 801, and the third signal line 801 extends from the connection assembly to the sand control screen and is connected with the radial compressive stress measuring device 802. The first signal line 401 may be connected to an external device, so that the measurement data measured by the sensing instrument 603 and the radial compressive stress measuring device 802, respectively, are finally transmitted through the first signal line 401.
The first signal pipeline 401 can be directly and independently connected to a wellhead and the outside or connected with the pump working condition 201 of the electric submersible pump 20, and signal transmission is carried out through a power supply cable carrying the electric submersible pump 20, so that cost is saved. That is, the upper end of the first signal line 401 is branched to form two paths, the first path is directly connected with the outside (wellhead) to form a first signal path, and the second path is connected with the ground wellhead through the pump working condition 201 of the submersible pump 20 and the power supply cable, so that the first signal line 401 is connected with the outside through the submersible pump 20 to form a second signal path. Both the first signal path and the second signal path need to be connected to a communication device in order to transmit the measured measurement data via the communication device.
The mode of the quick insertion block that mutually supports through wet male end 402 of plug and wet female end 601 is connected to but make first signal pipeline 401 and second signal pipeline 602 high-speed joint, realize the pilot production operation in-process signal rapid intercommunication.
The upper end of the oil pipe 105 is also sequentially connected with an air path oil pipe 101, a telescopic oil pipe 103 and a punching oil pipe 104 from top to bottom. An electric submersible pump 20 is further mounted on one side of the gas path oil pipe 101, the gas path oil pipe 101 is fixedly connected with the electric submersible pump 20, the lower end of the electric submersible pump 20 is connected with a pump working condition 201, and the upper end of the electric submersible pump is connected with a water path oil pipe 102. The telescopic tubing 103 provides a matching length error between all tubing connections to ensure that the wet plug male end 402 and the wet plug female end 601 can be in butt joint with a communication signal.
In actual use, the method can be operated according to the following steps:
step 1: after corresponding parts are assembled on a ground wellhead in sequence, the sand control screen pipe of the lower well completion pipe column is put in, then a connecting assembly with an inner cavity is connected, the sand control screen pipe is installed and connected at the lower end of the connecting assembly, a proper amount of hydraulic oil is injected into the inner cavity 607 through the check valve punching hole 609, so that the pressure in the inner cavity 607 reaches a preset pressure value, the piston 605 can bear the weight of the sand control screen pipe connected with the lower part of the piston, and the lower well completion pipe column is put in a designed position in the well and then is sealed in a setting mode.
The method comprises the steps of arranging an upper completion pipe column and a lower completion pipe column on the ground well mouth, connecting and fixing all parts of the upper completion pipe column, sleeving a single-action device on an oil pipe through a bearing, and connecting and fixing all parts of the lower completion pipe column.
Step 2: the upper completion string is also sequentially assembled at the surface wellhead and then run into the well, with tubing 105 and the group of single action directional stab communications assemblies on the upper completion string following run into the well during run into the well, and tubing exiting the single action directional stab communications assemblies extending through the connection assemblies previously run into the well into the sand control screen. And then, continuously lowering the upper completion string to a fixed design depth until the upper completion string is suspended and fixed at the wellhead, wherein the lower completion string is too large and medium, the telescopic oil pipe 103 of the upper completion string is in a free expansion state under the action of the gravity of the upper completion concerned part below the telescopic oil pipe 103 so as to balance the lowering length metering error and the construction error of the upper completion string, and fully ensure the lowering length of the upper completion string. Further, the bottom surface of the directional insert centralizing portion 3041 is in contact with the top surface of the sand control screen packer 501, and the top surface of the sand control screen packer 501 bears the weight of the upper completion string connected below the telescopic tubing 103, and then a part of the stroke of the telescopic tubing 103 is recovered. Thereby ensuring that the navigation key 502 on the connection assembly contacts the single action directional stinger communication assembly of the upper completion string and the navigation key 502 and the mule guide spiral ramp 3044 are installed and connected at the corresponding location of the tubing 105 such that the mule guide spiral ramp 3044 with the mule guide keyway 3043 is located within the connection assembly. In the process of lowering the completion string, the slant-opening guide shoe guide spiral inclined plane slides downwards along the positioning key, and the single-rotation directional plug-in communication assembly is rotated, when the slant-opening guide shoe guide spiral inclined plane 3044 contacts with the positioning key 502, under the combined action of the self weight of the oil pipe 105 and the pressing of other components connected with the oil pipe 105 and positioned at the upper end of the slant-opening guide shoe guide spiral inclined plane 3044, the slant-opening guide shoe guide spiral inclined plane 3044 slides on the positioning key 502, so as to drive the slant-opening guide shoe key groove 3043 on the slant-opening guide shoe guide spiral inclined plane 3044 to align with the positioning key 502.
After the beveled guide keyway 3043 is aligned with the alignment key 502, the upper completion string is lowered further, and the beveled guide keyway 3043 is nested into the alignment key 502, thereby achieving initial orientation. Continuing to lower the pipe string, so that the wet plug protection orientation front end 3042 on the connection assembly is inserted into the groove on the connection assembly to realize the second accurate positioning and fixing, and further continuing to lower the upper completion pipe string until the wet plug male end 402 is inserted into the wet plug female end 601 to realize the accurate butt joint and realize the communication connection of the first signal pipeline 401 and the second signal pipeline 602, so that the second signal pipeline 602 can pass through the first signal pipeline 401 and then be electrically connected with the first signal path and the second signal path,
and the third signal pipeline 801 is in communication connection with the second signal pipeline 602, so that the third signal pipeline 801 can pass through the first signal pipeline 401 and then be electrically connected with the first signal path and the second signal path, signal butt-joint communication between the upper completion string and the lower completion string is realized, and measurement signal communication is realized.
One path of the first signal pipeline 401 can be connected with the electric submersible pump 20 through the pump working condition 201, and the electric submersible pump 20 is used for realizing power and signal combination transmission by using a circuit of the electric submersible pump 20, so that the pin cost of additionally using the signal pipeline is saved, and the construction efficiency is improved. The other path of the first signal pipeline 401 may be directly connected to the outside through a signal line. That is, the upper end of the first signal line 401 is branched to form two paths, one path is directly connected with the outside, and the other path is connected with the outside through the submersible electric pump 20.
The upper completion pipe string stops continuously lowering after the upper completion pipe string is lowered to the designed fixed depth, and the single-action directional plug-in communication assembly at the moment may not be accurately lowered to the preset specified depth, so that the calculation error and the actual construction error need to be balanced, and the errors are balanced through the telescopic oil pipe, so that the wet plug male end 402 and the wet plug female end 601 can be accurately butted.
And step 3: and (3) carrying out depressurization pilot production operation, measuring the pressure (namely oil pressure) change in the inner cavity 607 by using the sensing instrument 603, wherein the pressure change in the inner cavity 607 reflects the longitudinal settlement stress change of the reservoir hydrate on the sand control screen pipe caused by the depressurization pilot production operation. Synchronously, the radial compressive stress change of the reservoir hydrate to the sand control screen pipe caused by the pilot production operation is obtained through the real-time monitoring of the radial compressive stress measuring device 802. The measured longitudinal settlement stress and radial compressive stress data are transmitted out through the first signal pipeline 401, the second signal pipeline 602 and the third signal pipeline 801, and therefore the compaction settlement stress is measured in real time in the hydrate pilot production process.
By the method and the corresponding operation steps, the compaction and sedimentation effects in the hydrate depressurization pilot production process can be monitored in real time in the hydrate reservoir through the sand control screen pipe, so that the preparation is made for the effect condition of sedimentation on the sand control screen pipe under the formal gas production operation, the foundation is laid for the formal gas production operation, the potential safety hazard of the gas production operation engineering is avoided, and the operation efficiency is improved.
The embodiments disclosed in this description are only an exemplification of the single-sided characteristics of the invention, and the scope of protection of the invention is not limited to these embodiments, and any other functionally equivalent embodiments fall within the scope of protection of the invention. Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A method of establishing a communicative coupling between an upper completion string and a lower completion string, wherein the upper completion string and the lower completion string are installed within a casing, the upper completion string is positioned at an upper end of the lower completion string, the upper completion string comprises a single action directional stab type communication assembly, an oil pipe, and the lower completion string comprises a coupling assembly, a sand control screen, and a measurement unit, comprising the steps of:
step 1: sequentially assembling a sand control screen pipe of a lower well completion pipe column and a connecting assembly with an inner cavity body at a ground wellhead, entering a well, injecting a proper amount of hydraulic oil into the inner cavity body so that the pressure in the inner cavity body reaches a preset pressure value, enabling the connecting assembly to bear the weight of the sand control screen pipe connected with the lower part of the connecting assembly, and continuing to enter the lower well completion pipe column to a designed underground position for setting;
step 2: sequentially assembling an upper well completion pipe column at a ground well mouth into a well, lowering the upper well completion pipe column to a fixed designed depth until the upper well completion pipe column is suspended and fixed at the well mouth, stopping lowering the upper well completion pipe column, wherein in the lowering process, a telescopic oil pipe of the upper well completion pipe column is in a free expansion state under the action of gravity of the upper well completion pipe column at the lower end so as to balance the lowering length metering error and the construction error of the upper well completion pipe column, thereby fully ensuring the lowering length of the upper well completion pipe column, further leading the bottom surface of a directional insertion righting part to be in contact with the top surface of a sand control screen packer, and recovering a part of the stroke of the telescopic oil pipe after the top surface of the sand control screen packer bears the weight of the upper well completion pipe column at the lower end of the telescopic oil pipe; thereby ensuring that a positioning key of the connecting assembly is contacted with a single-action directional plug-in type communication assembly on the upper well completion pipe string, fixedly mounting the positioning key on the connecting assembly, enabling the bevel connection guide shoe guide spiral inclined plane to slide downwards along the positioning key, and rotating the single-action directional plug-in type communication assembly, thereby driving a bevel connection guide shoe key groove on the bevel connection guide spiral inclined plane to align to the positioning key, continuously lowering the upper well completion pipe string, and enabling the bevel connection guide shoe key groove to be sleeved into the positioning key, thereby realizing primary orientation; ensuring that the front end of a wet joint protection orientation on the connecting assembly is inserted into a groove on the connecting assembly to realize secondary accurate positioning and fixing, and then continuing to put down the upper well completion pipe column until the male end of the wet plug is inserted into the female end of the wet plug to realize the communication connection of either a first signal path or a second signal path with a communication device, wherein the first signal path is a signal path formed by directly connecting a first signal pipeline to a ground well head, and the second signal path is a signal path formed by connecting the first signal pipeline with the ground well head through the pump working condition of an electric submersible pump and a power supply cable, so that the signal butt connection between the upper well completion pipe column and the lower well completion pipe column is communicated with the ground well head, and the communication of measurement signals is realized;
and step 3: and carrying out depressurization pilot production operation, measuring the pressure in the inner cavity through the measuring unit, wherein the pressure change in the inner cavity reflects the longitudinal settlement stress change of the reservoir hydrate to the sand control screen pipe caused by the pilot production operation, monitoring in real time through the measuring unit to obtain the radial compressive stress change of the reservoir hydrate to the sand control screen pipe caused by the pilot production operation, and transmitting the measured longitudinal settlement stress and radial compressive stress data through the first signal path or the second signal path.
2. The method of establishing a communicative coupling between an upper completion string and a lower completion string according to claim 1, wherein the single-action directional pluggable communication module is directionally pluggable and snapped into place on the connection module, wherein the single-action directional pluggable communication module is provided with a single-action device and a communication device, wherein the single-action device is fixedly sleeved on the tubing along an axial direction, and wherein the single-action device is used for maintaining the tubing from rotating along with the single-action directional pluggable communication module when the single-action directional pluggable communication module rotates,
the lower end of the connecting component is integrally put into the well after the sand control screen pipe is connected with the well mouth, the sand control screen pipe is arranged along the axial direction of the sleeve, an inner cavity body is arranged between the sand control screen pipe and the connecting component, a one-way valve punching opening for pumping hydraulic oil into the inner cavity body is arranged on the connecting component, the one-way valve punching opening is communicated and connected with the inner cavity body,
the measuring unit is arranged on the sand control screen pipe, is connected with the communication device and is used for measuring the longitudinal settlement stress and the radial compressive stress of the reservoir hydrate on the sand control screen pipe in the pilot production process,
the single-action device is provided with a wet joint protection directional front end which is positioned at the lower end of the single-action device and extends downwards towards the connecting component, the wet joint protection directional front end is used for being inserted into the corresponding position of the connecting component, so that a wet plug is accurately inserted, the extension length of the protection directional front end is greater than that of the wet plug, and extrusion damage caused by the joint contact of the wet plug and the top surface of the sand control screen packer when orientation fails is avoided,
and during the lowering process of the upper completion string, the oil pipe which penetrates out of the single-action directional plug-in type communication assembly penetrates through the connecting assembly from top to bottom and then extends into the sand control screen pipe.
3. The method of establishing a communication connection between an upper completion string and a lower completion string of claim 2, wherein the coupling assembly includes a sand control screen packer having a groove on an upper end surface thereof that is complementary to the wet joint protection orienting nose, the wet joint protection orienting nose being inserted into the groove to enable the single action oriented male communication assembly to be securely snapped onto the coupling assembly.
4. The method of claim 3, wherein the sand control screen packer has a wet plug female end on an upper end surface, and a directional insertion centralizing portion on the single-acting device, wherein the lower end of the directional insertion centralizing portion is fixedly connected with the wet plug, and a wet plug male end adapted to the wet plug female end is provided at a bottom end of the directional insertion centralizing portion, and the wet plug male end is used for being inserted into the wet plug female end.
5. The method of claim 2, wherein the single-acting device further comprises a mule-neck guide spiral bevel and a mule-neck guide key groove, the mule-neck guide key groove is mounted at an upper end of the mule-neck guide spiral bevel and connected to the mule-neck guide spiral bevel, the mule-neck guide spiral bevel is located in the tubing and extends along an axial direction of the tubing, the mule-neck guide spiral bevel is engaged with the alignment key of the connection assembly, the mule-neck guide spiral bevel is located above the alignment key, and when the mule-neck guide spiral bevel slides down to contact the alignment key, the mule-neck guide key groove is aligned with the alignment key, so that the single-acting directional plug-in communication assembly and the connection assembly complete a preliminary directional connection.
6. The method of claim 2, wherein the measurement unit comprises a sensing instrument mounted within the connection assembly for measuring a pressure within the inner cavity that reflects a longitudinal settling stress of reservoir hydrates on the sand screen during the pilot production process, the sensing instrument being connected to the communication device sequentially via the first and second signal lines,
the second signal pipeline is located the coupling assembling, and first signal pipeline passes wet male end of plug and wet female end back and is connected with the second signal pipeline that is located the coupling assembling.
7. The method of establishing a communicative coupling between an upper completion string and a lower completion string according to claim 6, wherein the sensing instrument measures pressure within the internal cavity via a pressure tapping line mounted on the coupling assembly and communicatively coupled to the internal cavity.
8. The method of claim 2, wherein the measuring unit comprises a radial compressive stress measuring device for measuring the radial compressive stress of the hydrate in the reservoir acting on the sand screen during the pilot production process, the radial compressive stress measuring device is transversely arranged at the lower end of the sand screen and can be in direct contact with the hydrate in the outer reservoir, the radial compressive stress measuring device is connected with the first signal pipeline through a third signal pipeline, and the third signal pipeline extends from the connecting assembly to the sand screen and the radial compressive stress measuring device.
9. The method of claim 2, wherein the sand screen is fixedly connected to the connecting assembly by a piston, the piston is mounted on an upper end of the sand screen, the piston and the connecting assembly define the inner chamber therebetween, and a check valve is mounted on the connecting assembly and is in communication with the inner chamber.
10. The method of claim 2, wherein the single-acting device comprises a mandrel, a bearing sleeve, a first bearing and a second bearing, wherein two ends of the mandrel are fixedly connected with the drilling oil pipe and the oil pipe respectively, the bearing sleeve is sleeved on the mandrel and the oil pipe, and the single-acting connection is realized by axially limiting and fixedly installing the first bearing and the second bearing on the mandrel.
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