CN108386184B - Horizontal well borehole collapse pressure testing device - Google Patents
Horizontal well borehole collapse pressure testing device Download PDFInfo
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- CN108386184B CN108386184B CN201810377095.7A CN201810377095A CN108386184B CN 108386184 B CN108386184 B CN 108386184B CN 201810377095 A CN201810377095 A CN 201810377095A CN 108386184 B CN108386184 B CN 108386184B
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- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 230000007246 mechanism Effects 0.000 claims abstract description 109
- 239000000523 sample Substances 0.000 claims abstract description 92
- 239000011435 rock Substances 0.000 claims abstract description 59
- 238000006073 displacement reaction Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
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- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005325 percolation Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005279 excitation period Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal 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
- E21B47/06—Measuring temperature or pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention discloses a horizontal well borehole collapse pressure testing device, which comprises a pressure kettle; a diversion plug; an axial thrust mechanism; a displacement control mechanism capable of moving radially relative to the rigid tub; the temperature control mechanism is used for controlling the temperature in the elastic barrel; the infrared measurement mechanism comprises a first probe arranged on the lower side of the first light transmission part and a second probe arranged on the upper side of the second light transmission part and longitudinally corresponding to the first probe, and the first probe and the second probe can synchronously move along the horizontal direction; the guide mechanism comprises a guide rail, a probe clamping mechanism and a motor, and an output shaft of the motor is in transmission connection with the probe clamping mechanism. The technology can monitor the mechanical and displacement information in the rock uniaxial loading test, the rock triaxial mechanical test, the rock creep mechanical test, the rock temperature-change stress loading test and other tests around the well bore.
Description
Technical Field
The invention relates to the field of rock mechanics experiments, in particular to a horizontal well borehole collapse pressure testing device.
Background
Along with the deep development of oil gas, the vertical drilling depth is close to ten thousand meters, the lengths of open hole sections of different well types are continuously increased, the temperature environment of deep rock is obviously increased, the temperature of deep well wall rock can even reach more than 350 ℃ in the high Wen Jingzuan well process, the structure and mechanical properties of rock can be changed due to the change of rock temperature, so that the influence rule of the temperature change on the mechanical properties of the rock and damage mechanism is accurately known, the well wall strength is judged and predicted, and the well wall stability in particular in a high temperature state has important practical significance for safe drilling engineering.
The collapse pressure measurement method is more, such as indoor measurement, differential method calculation, finite element prediction and the like, but is not used for deep strata of oil fields in most cases, and particularly for deep buried high-temperature strata, no perfect and continuous test method is available at present, and the main reasons are as follows: 1. for shallow low-temperature stratum, the conventional mechanical test mode is adopted to meet the determination of physical parameters of rock, the method is mature, and the data acquisition is directly carried out by adopting mechanical test methods such as single axis, triaxial and the like; 2. along with the development of high-temperature high-pressure wells, the influence of the combined action of high temperature and high pressure on petrophysical parameters is aggravated, and the single temperature or confining pressure environment simulation cannot accurately simulate the required environment; 3. the temperature, the confining pressure and the optical test are integrated to form a complete test system, and the high integration level is required in the links of the pressure cavity, the optical probe and the like.
Therefore, a set of economic and simple indoor measurement method and device are researched, and the method and the device are urgent matters for solving the problem of research on the stability mechanics of the well wall of the deep Wen Jingzuan well.
Disclosure of Invention
In order to overcome the defects in the prior art, the technical problem to be solved by the invention is to provide the horizontal well borehole collapse pressure testing device which has a simple and visual structure and is easy and convenient to operate, the synchronous acquisition of optical signals in the mechanical experiment process of different well type boreholes in a temperature change state can be realized, the identification processing of the signals and the tracking test of creep displacement are realized, and further the specific displacement information of borehole rock temperature to collapse pressure is obtained.
The specific technical scheme of the invention is as follows: a horizontal well borehole collapse pressure testing device, comprising:
the pressure kettle comprises a pressure cavity extending along the horizontal direction and a test cavity extending along the horizontal direction, wherein the test cavity comprises a rigid barrel positioned in the pressure cavity and an elastic barrel positioned in the rigid barrel and capable of deforming along the radial direction;
the guide plug is arranged on the right side in the elastic barrel and used for accommodating rocks, and the guide plug is provided with a first light-transmitting part;
the axial thrust mechanism is positioned on the right side of the rock relative to the diversion plug, the axial thrust mechanism can move relative to the pressure kettle, one end of the axial thrust mechanism positioned in the pressure kettle is provided with a diversion mechanism capable of being jointed with the pressure cavity and the testing cavity, the diversion mechanism comprises a seepage channel capable of communicating the pressure cavity with the elastic barrel when the diversion mechanism is jointed with the pressure cavity and the testing cavity, and the diversion mechanism is provided with a second light transmission part;
the displacement control mechanism can transversely move relative to the rigid barrel, one end of the displacement control mechanism is positioned in the pressure cavity, and the other end of the displacement control mechanism is arranged on the elastic barrel;
the temperature control mechanism is used for controlling the temperature in the elastic barrel;
the infrared measurement mechanism comprises a first probe arranged on the right side of the first light transmission part and a second probe arranged on the left side of the second light transmission part and corresponding to the first probe in the transverse direction, and the first probe and the second probe can synchronously move in the horizontal direction;
the guide mechanism comprises a guide rail, a probe clamping mechanism and a motor, wherein the probe clamping mechanism is movably arranged on the guide rail along the extending direction of the guide rail, the motor is provided with an output shaft, the probe clamping mechanism is used for clamping a first probe or a second probe, and the output shaft of the motor is in transmission connection with the probe clamping mechanism.
Preferably, the pressure kettle comprises an outer cover, the axial thrust mechanism comprises an axial loading device, a thrust rod which can be in transmission connection with the axial loading device and penetrates through the outer cover, a sealing cover plate which is sealed with the outer cover is fixedly arranged at one end of the thrust rod, which is positioned in the pressure kettle, the flow guiding mechanism comprises a seepage plug which can be matched with the elastic barrel and is provided with a seepage channel, and a seepage connector which is arranged on the seepage plug, a flow guiding groove of the seepage connector is communicated with the seepage channel of the seepage plug, the seepage channel is communicated with an inner cavity of the elastic barrel, and the flow guiding groove is communicated with the pressure cavity.
Preferably, the seepage plug is provided with a protective cover at one side of the seepage plug, which is away from the rock, and the protective cover is arranged outside the first probe or the second probe.
Preferably, the pressure cavity is provided with a side wall, a liquid guide plug communicated with the pressure cavity is arranged on the side wall, and the liquid guide pipe penetrates through the side wall.
Preferably, the temperature control mechanism includes a heater extending leftwardly from the diversion bulkhead.
Preferably, a sealing cavity is formed between the diversion plug and the side wall, and the first probe or the second probe is arranged in the sealing cavity.
Preferably, the seepage interface is provided with a plurality of diversion trenches distributed along the circumferential direction on one side of the seepage interface facing the rock, and each diversion trench is communicated with the seepage channel.
Preferably, a control unit is included for controlling the axial thrust mechanism, the displacement control mechanism, the temperature control mechanism, the infrared measurement mechanism.
Preferably, the second light-transmitting portion is located between the seepage plug and the seepage joint in a radial direction.
The utility model aims at providing a collapse pressure testing arrangement of test rock under different temperature variation adopts the device can realize rock axial pressure control, radial confining pressure control, temperature control, well control, infrared (laser) multi-point measurement, and it can monitor the optical information among the experiment such as well creep mechanics experiment, well collapse pressure test, horizontal well temperature change collapse pressure test.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.
Fig. 1 is a schematic structural diagram of a horizontal well borehole collapse pressure testing device according to an embodiment of the present invention.
FIG. 2 is a bottom view of the axial thrust mechanism;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
FIG. 4 is a top view of the autoclave;
FIG. 5 is a cross-sectional view of FIG. 4;
fig. 6 is a schematic structural view of a part of the guide mechanism.
Fig. 7 is a schematic view of another part of the guide mechanism.
Fig. 8 is a schematic diagram of a rock stress test.
Reference numerals of the above drawings: 1-a pressure kettle; 2-an axial thrust mechanism; 3-an infrared measurement mechanism; 4-a guiding mechanism; 401-supporting seat; 402-a guide rail; 403-a probe clamping mechanism; 404-an electric motor; 405-a gear transmission mechanism; 6-a temperature control mechanism; 7-a control unit; 201-axial loading means; 202-a sealing device; 203-an upper cover; 204-seepage plugs; 205-a second light-transmitting portion; 206-a seepage interface; 207-sealing the cover plate; 208-percolation channel; 209-a protective cover; 301-a second probe; 303-interface; 101-a pressure chamber; 102-a test chamber; 103-a displacement control mechanism; 104-a diversion plug; 105-a first light-transmitting portion; 106-a first probe; 107-a drain plug; 108-rigid barrels; 109-elastic barrels; 110-heaters.
Detailed Description
The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention.
Referring to fig. 1, 2, 3, 4, 5, 6 and 7, a horizontal well borehole collapse pressure testing device according to an embodiment of the present application includes: a pressure kettle 1, wherein the pressure kettle 1 comprises a pressure cavity 101 extending along the horizontal direction and a test cavity 102 extending along the horizontal direction, and the test cavity 102 comprises a rigid barrel 108 positioned in the pressure cavity 101 and an elastic barrel 109 positioned in the rigid barrel 108 and capable of deforming along the radial direction; a diversion bulkhead 104, wherein the diversion bulkhead 104 is arranged at the left side in the elastic barrel 109 for accommodating rocks, and the diversion bulkhead 104 is provided with a first light-transmitting part 105; an axial thrust mechanism 2, the axial thrust mechanism 2 is positioned on the right side of the rock relative to the diversion plug 104, the axial thrust mechanism 2 can move relative to the pressure kettle 1, one end of the axial thrust mechanism 2 positioned in the pressure kettle 1 is provided with a diversion mechanism capable of being jointed with the pressure cavity 101 and the test cavity 102, the diversion mechanism comprises a seepage channel 208 capable of communicating between the pressure cavity 101 and the elastic barrel 109 when the seepage plug 204 is jointed with the pressure cavity 101 and the test cavity 102, and the diversion mechanism is provided with a second light transmission part 205; a displacement control mechanism 103, wherein the displacement control mechanism 103 can move along the radial direction relative to the rigid barrel 108, one end of the displacement control mechanism 103 is positioned in the pressure cavity 101, and the other end of the displacement control mechanism 103 is arranged on the elastic barrel 109; a temperature control mechanism 5, wherein the temperature control mechanism 5 is used for controlling the temperature in the elastic barrel 109; the infrared measurement mechanism 3, the infrared measurement mechanism 3 includes a first probe 106 disposed on the right side of the first light transmission portion 105 and a second probe 301 disposed on the left side of the second light transmission portion 205 and corresponding to the first probe 106 in the longitudinal direction, and the first probe 106 and the second probe 301 can move synchronously in the horizontal direction.
By means of the structure, fluid entering from the pressure cavity 101 can enter the elastic barrel 109 from the seepage channel 208 of the seepage plug 204, the fluid in the pressure cavity 101 can provide radial acting force for the elastic barrel 109 through the displacement control mechanism 103, the fluid entering the elastic barrel 109 can provide axial acting force for rock, and the temperature control mechanism 5 can control the temperature of the fluid in the elastic barrel 109 according to the temperature sensor, so that a high-temperature and high-pressure structure of the rock is constructed. The infrared measuring means 3 can also measure the rock in the elastic barrel 109.
Referring to fig. 4 and 5, specifically, the autoclave 1 includes a pressure chamber 101 and a test chamber 102. The pressure chamber 101 has a left side wall and a right side wall. The left side wall of the pressure chamber 101 is connected to the base by a flange connection cover 203. The right side wall of the pressure chamber 101 is connected to the base by a flange. A liquid guiding plug 107 communicated with the pressure cavity 101 is also arranged on the right side wall of the pressure cavity 101.
A test chamber 102 is located within the pressure chamber 101. The test chamber 102 includes a rigid tub 108 (e.g., made of steel structure) on the outside and an elastic tub 109 (e.g., made of high-deformation metal) on the inside. Wherein the rigid barrel 108 is secured to the side wall of the pressure chamber 101 by pins. The elastic tub 109 may be deformed in a radial direction.
A diversion bulkhead 104 is provided on the right side of the elastic barrel 109. Rock may be placed on the diversion bulkhead 104 and within the flexible barrel 109. The diversion plugs 104 and the side walls are provided with diversion pipes communicated with the elastic barrel 109. The draft tube may expel fluid from the flexible barrel 109.
Referring to fig. 1, the displacement control mechanism 103 is capable of moving radially with respect to the rigid tub 108, one end of the displacement control mechanism 103 is located in the pressure chamber 101, and the other end of the displacement control mechanism 103 is disposed on the elastic tub 109. The fluid within the pressure chamber 101 may exert a radial force on the resilient barrel 109 via the displacement control mechanism 103, thereby radially deforming the resilient barrel 109. The displacement control mechanism 103 further includes a displacement sensor capable of detecting the amount of deformation of the elastic barrel 109 in the radial direction.
Referring to fig. 2 and 3, the axial thrust mechanism 2 includes an axial loading device 201, a thrust rod that can be in transmission connection with the axial loading device 201 and is inserted through the cover 203, a sealing cover 207 that seals with the cover 203 is fixedly disposed at one end of the thrust rod located in the autoclave 1, and the diversion mechanism includes a seepage plug 204 and a seepage joint. The seepage plug 204 is connected with the seepage interface 206 through a bolt, and the seepage interface 206 is fixed on the sealing cover plate 207 through a bolt. The thrust rod is provided with a sealing device 202 which can seal a cover 203.
The permeate port 206 can be sealed with the left side of the pressure chamber 101 and the permeate plug 204 can be sealed with the left side of the flexible barrel 109. The seepage interface 206 is provided with a plurality of diversion trenches arranged along the circumferential direction on one side facing the rock, and each diversion trench is communicated with the seepage channel 208. The seepage channel 208 is communicated with the inner cavity of the elastic barrel 109, and the diversion trench is communicated with the pressure cavity 101. The thrust rod of the axial thrust mechanism 2 can move relative to the pressure kettle 1, so that the pressure cavity 101 is communicated with the elastic barrel 109.
Referring to fig. 1, in the present embodiment, the temperature control mechanism 5 may include a heater 110, a temperature sensor, a temperature display, a signal output interface 303, a resistance control valve, etc. extending leftward from the flow-guiding plug 104. The temperature of the fluid inside the flexible barrel 109 may be controlled by adjusting the resistance control valve. The temperature control mechanism 5 of the present embodiment further includes a temperature sensor mounted within the percolation path 208 of the axial thrust mechanism 2. The control unit 6 is respectively connected with the signal output interface 303 and the temperature display, controls the position of the resistor control valve, adjusts the size of the heating resistor, stores temperature data and displays the current temperature value.
In this embodiment, the seepage plug 204 is provided with a protective cover 209 on its side facing away from the rock, the protective cover 209 being provided outside the infrared measuring device 3. A chamber is formed between the diversion plug 104 and the side wall, and the infrared measurement mechanism 3 is arranged in the chamber.
Referring to fig. 1, the first probe 106 is disposed on the right side of the first light transmitting portion 105. The second probe 301 is disposed on the left side of the second light transmitting portion 205. Wherein the first probe 106 and the second probe 301 are correspondingly arranged in the lateral direction. In the present embodiment, the number of the first probe 106 and the second probe 301 is four. Of course, in other alternative embodiments, the number of first probes 106 and second probes 301 may be other corresponding ones.
Referring to fig. 6 and 7, the infrared measurement mechanism 3 further includes a guide mechanism 4, where the guide mechanism 4 includes a guide rail 402, a probe clamping mechanism 403 movably disposed on the guide rail 402 along an extending direction of the guide rail 402, and a motor 404 having an output shaft, the probe clamping mechanism 403 may clamp the first probe 106 or the second probe 301, and the output shaft of the motor 404 and the probe clamping mechanism 403 may be engaged through a gear transmission mechanism 405, so as to drive the first probe 106 or the second probe 301 to move along the guide rail 402. Preferably, each of the guide rails 402 may be provided on one of the ring-shaped holders 401, thereby facilitating installation and fixation.
The embodiment of the application further comprises a control unit 6, wherein the control unit 6 is used for controlling the axial thrust mechanism 2, the displacement control mechanism 103, the temperature control mechanism 5 and the infrared measurement mechanism 3. Specifically, the control unit 6 includes a signal receiving and converting module, a computer, and processing software, and can implement temperature, pressure, displacement, and infrared probe measurement and control in the test process.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
The test probe radial displacement control device is divided into a rock mechanical pressure cavity 101 and an axial thrust mechanism 2, a gear transmission system in the test probe radial displacement control device synchronously displaces, and 4 (not limited to 4) infrared probes are arranged on each test probe radial displacement control device.
The whole testing device is a sealed container, and the medium in the liquid storage tank is not limited to water.
The invention is realized by the following technical scheme:
a collapse pressure testing method for testing rock under different temperature changes comprises the following steps:
step 1: the rock of the well bore is manufactured into a circular ring shape according to the installation size of the test cavity 102, and is installed in the test cavity 102, and a glass bottom plate, a seepage plug 204, a test probe radial displacement control device, an infrared receiving probe and a heating system are installed at the bottom end of the test cavity 102; the lower end of the axial thrust mechanism 2 is provided with a seepage plug 204 and a glass cover plate, and the infrared emission probe radial displacement control device, the infrared emission probe and the temperature test probe are fixed in a sealing area formed by the glass cover plate and the cover body 203; the radial displacement control device of the test probe can realize that the infrared test probe moves along the radial direction of the rock pressure cavity 101, and the radial displacement control device of the test probe is connected with the infrared test pressure head through bolts; the axial thrust mechanism 2 can apply axial thrust and generate axial displacement; the test cavity 102 is made of an expansion material, and can transmit the liquid pressure of the pressure cavity 101 to generate axial pressure on the test cavity 102;
step 2: the positions of the infrared transmitting probe and the receiving probe are adjusted, so that the infrared light beams emitted by the infrared transmitting probe can be tightly attached to the inner annular wall surface of the rock of the well bore and are not blocked, and the infrared receiving probe can clearly receive signals;
step 3: adjusting a temperature testing and controlling device, heating the liquid in the liquid storage tank to reach a preset temperature value, and recording the radial position X1 displayed by the radial displacement controlling device of the testing probe;
step 4: pressurizing the rock in the well bore, pumping liquid into the liquid guide plug 107 through the liquid inlet pump, increasing the pressure in the pressure cavity 101 to a preset pressure, and recording the radial position X2 displayed by the radial displacement control device of the test probe when the temperature test probe in the cover 203 reaches a stable temperature;
step 5: adjusting a built-in heater 110 in a pressure cavity 101 of the rock mechanics experiment machine to heat an internal medium, enabling the temperature in a test cavity 102 to reach a preset temperature T1, exciting an infrared emission probe at intervals of a time excitation period T, enabling the temperature to rise, reducing the diameter of a rock in a well hole, blocking an infrared receiving probe, automatically adjusting and synchronously adjusting a radial displacement control device of the test probe in an upper cavity sealing pressure head and a lower cavity sealing pressure head, moving towards the center direction of the well hole, shifting by delta S each time, after the first shifting, enabling the infrared receiving probe to receive an infrared signal, stopping shifting, and recording the shifting S1=I.delta S; continuing with the heating, the displacements S2, S3, …, SN are also recorded.
The test procedure provided in this example is as follows:
(1) The borehole rock is made into an annular structure of the borehole according to the test requirements and placed into the rock pressure chamber 101.
(2) And (3) regulating the heating furnace, heating the medium in the liquid outlet pipe to a set temperature, and opening the confining pressure liquid inlet system.
(3) The position of the infrared probe on the radial displacement control device of the test probe is adjusted through the synchronous acquisition and processing system of data, so that the infrared rays are not blocked by the side wall of the rock and cling to the side wall of the rock, and the position of the probe is recorded.
(4) Pressurization is performed.
(5) Likewise, the position of the infrared probe is adjusted, the infrared rays are not blocked by the side wall of the rock, the infrared rays are tightly attached to the side wall of the rock, and the position of the probe is recorded.
(6) Heating is performed.
(7) Likewise, the position of the infrared probe is adjusted, the infrared rays are not blocked by the side wall of the rock, the infrared rays are tightly attached to the side wall of the rock, and the position of the probe is recorded.
(8) After the experiment is finished, oil is discharged.
(9) And opening the triaxial chamber, taking the device out of the test bed, and discharging engineering liquid.
Referring to fig. 8, the advantages of the present invention are: the defect that the existing rock mechanical property testing device cannot measure the influence of rock temperature change on strength is overcome, the blank of the borehole collapse pressure testing of the horizontal well is filled, the collapse pressure testing device for testing the rock under different temperature changes is innovatively developed, the influence of the test temperature on the high-pressure rock strength is particularly influenced on the rock collapse pressure around the borehole of the horizontal well, the borehole wall strength is further predicted and evaluated, and a guiding basis is provided for predicting the borehole wall stability of an oil-gas deep well, an ultra-deep well and a high-temperature well. The technology can monitor the mechanical and displacement information in the rock uniaxial loading test, the rock triaxial mechanical test, the rock creep mechanical test, the rock temperature-change stress loading test and other tests around the well bore.
The method can be suitable for synchronously monitoring the collapse pressure of the rock in a constant temperature state, simultaneously is suitable for synchronously measuring the collapse pressure of the rock around the well drilling hole in different temperature and pressure environments, simultaneously is suitable for synchronously measuring the collapse pressure of the rock around the well drilling hole in different well type (vertical well, horizontal well and directional well) in different temperature and pressure environments, and can solve the stability prediction of the well drilling hole in a high temperature and high pressure state.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (8)
1. A horizontal well borehole collapse pressure testing device, comprising:
the pressure kettle comprises a pressure cavity extending along the horizontal direction and a test cavity extending along the horizontal direction, wherein the test cavity comprises a rigid barrel positioned in the pressure cavity and an elastic barrel positioned in the rigid barrel and capable of deforming along the radial direction, the pressure cavity is provided with a side wall, the side wall is provided with a liquid guide plug communicated with the pressure cavity, and the side wall is provided with a flow guide pipe in a penetrating way, and the flow guide pipe can discharge fluid in the elastic barrel;
the guide plug is arranged on the right side in the elastic barrel and used for accommodating rocks, and the guide plug is provided with a first light-transmitting part;
the axial thrust mechanism is positioned on the right side of the rock relative to the diversion plug, the axial thrust mechanism can move relative to the pressure kettle, one end of the axial thrust mechanism positioned in the pressure kettle is provided with a diversion mechanism capable of being jointed with the pressure cavity and the testing cavity, the diversion mechanism comprises a seepage channel capable of communicating the pressure cavity with the elastic barrel when the diversion mechanism is jointed with the pressure cavity and the testing cavity, and the diversion mechanism is provided with a second light transmission part;
the displacement control mechanism can transversely move relative to the rigid barrel, one end of the displacement control mechanism is positioned in the pressure cavity, and the other end of the displacement control mechanism is arranged on the elastic barrel;
the temperature control mechanism is used for controlling the temperature in the elastic barrel;
the infrared measurement mechanism comprises a first probe arranged on the right side of the first light transmission part and a second probe arranged on the left side of the second light transmission part and corresponding to the first probe in the transverse direction, and the first probe and the second probe can synchronously move in the horizontal direction;
the guide mechanism comprises a guide rail, a probe clamping mechanism and a motor, wherein the probe clamping mechanism is movably arranged on the guide rail along the extending direction of the guide rail, the motor is provided with an output shaft, the probe clamping mechanism is used for clamping a first probe or a second probe, and the output shaft of the motor is in transmission connection with the probe clamping mechanism.
2. The horizontal well borehole collapse pressure testing device according to claim 1, wherein the pressure kettle comprises an outer cover, the axial thrust mechanism comprises an axial loading device and a thrust rod which can be in transmission connection with the axial loading device and penetrates through the outer cover, one end of the thrust rod in the pressure kettle is fixedly provided with a sealing cover plate which is sealed with the outer cover, the flow guiding mechanism comprises a seepage plug which can be matched with the elastic barrel and is provided with a seepage channel, and a seepage joint which is arranged on the seepage plug, a flow guiding groove of the seepage joint is communicated with the seepage channel of the seepage plug, the seepage channel is communicated with an inner cavity of the elastic barrel, and the flow guiding groove is communicated with the pressure cavity.
3. The horizontal well bore collapse pressure testing device according to claim 2, wherein the seepage plug is provided with a protective cover on the side facing away from the rock, and the protective cover is arranged outside the first probe or the second probe.
4. The horizontal well bore collapse pressure testing device according to claim 1, wherein the temperature control mechanism comprises a heater extending leftwardly from the diverter plug.
5. The horizontal well bore collapse pressure testing device according to claim 1, wherein a sealed chamber is provided between the diverter plug and the sidewall, and the first probe or the second probe is disposed in the sealed chamber.
6. The horizontal well borehole collapse pressure testing device according to claim 2, wherein the seepage plug is connected with a seepage interface, the seepage interface is fixed on the sealing cover plate, a plurality of diversion trenches distributed along the circumferential direction are arranged on one side of the seepage interface, facing towards the rock, of the seepage interface, and each diversion trench is communicated with a seepage channel.
7. The horizontal well bore collapse pressure testing device according to claim 1, comprising a control unit for controlling the axial thrust mechanism, the displacement control mechanism, the temperature control mechanism, the infrared measurement mechanism.
8. The horizontal well bore collapse pressure testing device according to claim 2, wherein the second light transmitting portion is located radially between the seepage plug and the seepage joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN105334107A (en) * | 2015-10-28 | 2016-02-17 | 西安石油大学 | Clay shale borehole wall stabilizing drilling fluid density determination method based on formation viscoelasticity |
| CN106351650A (en) * | 2015-07-16 | 2017-01-25 | 中国石油化工股份有限公司 | Calculation method of borehole sloughing pressure applicable to the bedding fractured stratum |
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| CN2748917Y (en) * | 2004-09-30 | 2005-12-28 | 湖北汉科新技术股份有限公司 | High-temperature and high-pressure well wall stability tester |
| CN101701520A (en) * | 2009-12-04 | 2010-05-05 | 中国石油大学(华东) | Simulation experiment device for migrating rock cuttings with circulation of deepwater drilling fluid and stabilizing well wall |
| CN202017486U (en) * | 2011-03-09 | 2011-10-26 | 中国石油集团西部钻探工程有限公司 | Testing and evaluating device for stability of gas-liquid conversion well wall |
| CN103592205B (en) * | 2013-11-20 | 2014-09-17 | 中国石油大学(华东) | Device and method for testing diffusion coefficient of chemical potential in mudstone |
| CN103711480B (en) * | 2013-12-27 | 2016-07-06 | 中国地质大学（北京） | Horizontal drilling assay device |
| CN103775070B (en) * | 2014-01-10 | 2016-05-04 | 西南石油大学 | A kind of full-scale wellbore stability simulator |
| EP2980348B1 (en) * | 2014-07-30 | 2017-07-05 | 3M Innovative Properties Company | Separator for separating solid particles from liquid and gas flows for high differential pressures |
| CN106324189B (en) * | 2015-07-03 | 2019-08-09 | 中国石油化工股份有限公司 | A kind of casting bed blocks cementing analyzer and measuring method |
| CN208777985U (en) * | 2018-04-25 | 2019-04-23 | 中国石油大学(北京) | Horizontal well wellbore caving pressure test device |
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| CN106351650A (en) * | 2015-07-16 | 2017-01-25 | 中国石油化工股份有限公司 | Calculation method of borehole sloughing pressure applicable to the bedding fractured stratum |
| CN105334107A (en) * | 2015-10-28 | 2016-02-17 | 西安石油大学 | Clay shale borehole wall stabilizing drilling fluid density determination method based on formation viscoelasticity |
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