CN114109362B - Device and method for evaluating performance of multi-open multi-cementing-surface well cementation cement sheath of oil-gas well - Google Patents
Device and method for evaluating performance of multi-open multi-cementing-surface well cementation cement sheath of oil-gas well Download PDFInfo
- Publication number
- CN114109362B CN114109362B CN202010906198.5A CN202010906198A CN114109362B CN 114109362 B CN114109362 B CN 114109362B CN 202010906198 A CN202010906198 A CN 202010906198A CN 114109362 B CN114109362 B CN 114109362B
- Authority
- CN
- China
- Prior art keywords
- pressure
- cement sheath
- cementing
- simulated
- annulus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004568 cement Substances 0.000 title claims abstract description 151
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 14
- 238000011156 evaluation Methods 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 239000011435 rock Substances 0.000 claims description 38
- 230000005465 channeling Effects 0.000 claims description 37
- 239000002002 slurry Substances 0.000 claims description 26
- 238000005553 drilling Methods 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 3
- 238000003745 diagnosis Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 54
- 230000001105 regulatory effect Effects 0.000 description 27
- 238000004519 manufacturing process Methods 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 15
- 238000002474 experimental method Methods 0.000 description 15
- 239000007788 liquid Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to the field of oil and gas resource development, and discloses a device and a method for evaluating the performance of a multi-open multi-cementing-surface well cementation cement sheath of an oil and gas well. The device for evaluating the performance of the multi-open multi-cementing-surface cementing cement sheath of the oil-gas well can simulate the working condition of the multi-layer cement sheath in the multi-open multi-cementing-surface cementing structure of the ultra-deep oil-gas well, has high reliability of simulation results and strong engineering practicability, can be used for researching the change rule of the sealing performance of the multi-layer cement sheath in the multi-open multi-cementing-surface cementing structure under different well completion modes and well body structural conditions, and realizes the accurate evaluation of the performance of the cement sheath under the complex working condition of the well, thereby providing theoretical support for site construction and diagnosis.
Description
Technical Field
The invention relates to the field of oil and gas resource development, in particular to a device and a method for evaluating the performance of a multi-open multi-cementing-surface well cementation cement sheath of an oil and gas well.
Background
The well cementation structure of the oil-gas well is a multi-layer interface structure formed by a sleeve, a cement sheath and a stratum, and once the well cementation structure fails, serious accidents such as gas channeling, sleeve changing and the like are caused. Among them, four-open and five-open structures are the most complex multi-open and multi-cemented surface structures, and are widely used in ultra-deep oil and gas wells.
The cement sheath is used as an important component of the well bore of the oil-gas well, and has the main function of preventing the fluid at the bottom layer from flowing in the drilling, production and yield improvement processes. Along with the gradual entering of the oil-gas field into the middle and later stages of production, the production increasing measures such as acidification, fracturing and the like are widely applied, and more oil-gas wells have the problems of annulus pressure, interlaminar channeling and the like caused by the failure of the sealing integrity of a cement ring, and particularly, the problems of annulus pressure abnormality phenomenon in the production process of a high-pressure gas well are very common, so that great risks are brought to safe and stable production of the oil-gas field.
Therefore, the performance evaluation research of the multi-open multi-cementing-surface cementing cement sheath of the oil and gas well is developed, and the method has important significance for long-term and stable safe production of the oil and gas well. However, at present, no experimental device and method are available in China for researching the performance of the cement sheath under the condition of the multi-open multi-cementing surface structure of the ultra-deep oil-gas well, and the performance of the cement sheath under the condition of complex underground working conditions cannot be accurately evaluated.
Disclosure of Invention
The invention aims to solve the problems and provides a device and a method for evaluating the performance of a cementing cement sheath with multiple-open and multiple-cementing surfaces of an oil gas well, which are used for researching the performance of the cementing sheath under the condition of the multiple-open and multiple-cementing surface structure of an ultra-deep oil gas well.
In order to achieve the above object, according to one aspect of the present invention, there is provided an oil and gas well multi-open multi-cementing surface cementing cement sheath performance evaluation device, the device comprising:
The simulated wellbore comprises a simulated rock core and a simulated tube group, wherein the simulated tube group is coaxially inserted into the simulated rock core and has a radial gap with the simulated rock core to form a first annulus, the simulated tube group comprises at least two sleeves coaxially sleeved, a radial interval is arranged between the sleeves to form a second annulus, and the second annulus is communicated with the first annulus at the bottom end; and
The high-pressure reactor is provided with a containing cavity, the simulated shaft is arranged in the containing cavity, the high-pressure reactor is provided with a grouting port communicated with the first annular space, a slurry discharging port communicated with the second annular space, a first pressure applying port communicated with the bottom of the first annular space, a second pressure applying port communicated with the sleeve pipe and a pressure releasing port, the second pressure applying port is positioned at the center, and the high-pressure reactor is arranged to heat and apply confining pressure to the simulated rock core.
Optionally, a perforation communicating with the centrally located casing is provided in the simulated core, and a third pressure application port communicating with the perforation is provided in the autoclave.
Optionally, the autoclave comprises a confining pressure rubber sleeve located in the containing cavity and arranged around the simulated rock core, and the autoclave is provided with a confining pressure port communicated with the confining pressure rubber sleeve.
Optionally, the autoclave comprises a plurality of confining pressure rubber sleeves which are arranged along the axial direction of the simulated rock core, and the autoclave is provided with a plurality of confining pressure ports which are respectively communicated with the plurality of confining pressure rubber sleeves.
Optionally, the device comprises a heating jacket sleeved outside the autoclave, and the heating jacket is arranged around the simulated rock core.
Optionally, the autoclave includes a positioning structure for positioning the simulated core and the simulated tube set within the cavity.
Optionally, the autoclave includes that the top is open-ended cauldron body and detachably sealed lid locate the lid of opening part, the internal portion of cauldron is for hold the chamber, location structure includes follow hold the diapire in the chamber upwards extend to in the simulation rock core and support in the location boss of simulation nest of tubes bottom and set up in the lid bottom surface confession the annular that the sheathed tube top was inlayed and is established.
Optionally, the positioning structure further comprises an upper pressing sheet sleeved outside the simulated tube group and pressed between the cover body and the simulated rock core, and a lower pressing sheet sleeved outside the positioning boss and pressed between the bottom wall of the cavity and the simulated rock core; and/or
The autoclave comprises a sealing ring and a filter screen, wherein the sealing ring is clamped between the cover body and the autoclave body in a sealing manner, and the filter screen is clamped between the bottom of the simulation tube set and the positioning boss to block slurry entering the first annulus.
Optionally, the device comprises a well cementation construction unit, wherein the well cementation construction unit is communicated with the grouting port and used for injecting drilling fluid into the first annular space to form a mud cake on the inner wall of the simulated rock core and used for injecting cement slurry into the first annular space to form a cement ring in the first annular space and the second annular space.
Optionally, the device comprises a pressing unit, wherein the pressing unit is used for respectively applying pressure to the simulated rock core, the centrally-located casing pipe and the cement sheath.
Optionally, the device comprises a data acquisition unit, wherein the data acquisition unit is used for acquiring pressure and channeling data of the cement sheath.
Optionally, the device comprises a control unit, wherein the control unit is used for controlling the operation of the well cementation construction unit and the pressure applying unit and receiving the data acquired by the data acquisition unit.
The invention also provides a method for evaluating the performance of the multi-open multi-cementing-surface cementing cement sheath of the oil gas well, which comprises the following steps:
Filling cement paste into the first annulus and the second annulus, applying preset confining pressure to the simulated rock core, applying preset internal pressure to the sleeve at the center, applying preset pressure to the first annulus, and heating the simulated rock core to a preset temperature so as to cure and solidify the cement paste in the first annulus and the second annulus into a cement sheath;
Maintaining certain confining pressure and internal pressure, continuously increasing the pressure applied by the bottom of the cement sheath, and collecting and analyzing pressure and channeling data of the cement sheath at all positions: when the pressure at a certain position between the top and the bottom of the cement sheath suddenly increases to the pressure applied by the bottom of the cement sheath and the channeling occurs at the position, the tightness of the position and the lower part is destroyed; when the pressure at a certain position between the top and the bottom of the cement sheath is increased but no cross flow occurs at the certain position, the leakage flow of the pressure medium in the cement sheath is indicated to cause the sealing performance of the cement sheath to be damaged; and when the pressure at the top of the cement sheath is increased and pressure is applied near the bottom of the cement sheath, the overall tightness of the cement sheath is invalid.
Through the technical scheme, the device provided by the invention can simulate the working conditions of the multi-layer cement sheath in the multi-open multi-cementing-surface well cementation structure of the ultra-deep oil gas well, has high reliability of simulation results and strong engineering practicability, can be used for researching the change rule of the sealing performance of the multi-layer cement sheath in the multi-open multi-cementing-surface well cementation structure under different well completion modes and well body structure conditions, and realizes the accurate evaluation of the performance of the cement sheath under the complex working conditions in the well, thereby providing theoretical support for site construction and diagnosis.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, illustrate and explain the invention and are not to be construed as limiting the invention. In the drawings:
FIG. 1 is a schematic illustration of a simulated wellbore and autoclave assembly according to one embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the cover of FIG. 1;
FIG. 3 is a bottom view of the cover of FIG. 2;
FIG. 4 is a schematic view of the structure of the analog tube block of FIG. 1;
FIG. 5 is a bottom view of the simulated tube bank of FIG. 4;
FIG. 6 is a schematic structural view of an embodiment of the device for evaluating the performance of a multi-open multi-cemented surface cementing cement sheath of an oil and gas well according to the present invention.
Description of the reference numerals
10-Simulated wellbore, 11-simulated core, 111-perforation, 12-simulated tube-set, 121-production casing, 122-technical casing, 123-surface casing, 124-conduit, 125-first communication hole, 126-second communication hole, 13-first annulus, 14-second annulus, 20-autoclave, 21-confining pressure gel sleeve, 211-confining pressure port, 212-partition, 22-heating sleeve, 23-tank, 231-first pressure port, 232-pressure port, 233-third pressure port, 234-positioning boss, 24-cover, 241-grouting port, 242-slurry discharge port, 243-second pressure port, 244-ring groove, 25-upper tabletting, 26-lower tabletting, 27-sealing ring, 28-filter screen, 30-slurry tank, 31-slurry pump, 32-flowmeter, 33-first gas cylinder, 34-first gas booster pump, 35-pressure regulating valve, 36-pressure gauge, 37-first water tank, 38-first liquid booster pump, 39-second gas cylinder, 40-second gas booster pump, 41-second water tank, 42-second liquid booster pump, 43-emptying valve, 44-back pressure valve, 45-four-way, 46-tee joint, F1-F18-valve, P1-P14-fixed point pressure gauge, L5-L14-channeling detector.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used to generally refer to the orientation shown in the drawings. "inner and outer" means inner and outer relative to the contour of the respective parts themselves.
In one aspect, the invention provides a device for evaluating the performance of a multi-open multi-cementing-surface cementing cement sheath of an oil and gas well, which comprises a simulated wellbore 10 and an autoclave 20, wherein the simulated wellbore 10 comprises a simulated rock core 11 and a simulated tube group 12, the simulated tube group 12 is coaxially inserted into the simulated rock core 11 and has a radial clearance with the simulated rock core 11 to form a first annulus 13, the simulated tube group 12 comprises at least two sleeves coaxially sleeved, a radial clearance is arranged between the sleeves to form a second annulus 14, and the second annulus 14 is communicated with the first annulus 13 at the bottom end; the autoclave 20 has a cavity therein in which the simulated wellbore 10 is placed, the autoclave 20 being provided with a grouting port 241 communicating with the first annulus 13, a drainage port 242 communicating with the second annulus 14, a first pressure application port 231 communicating with the bottom of the first annulus 13, and a second pressure application port 243 and pressure release port 232 communicating with the centrally located casing, the autoclave 20 being arranged to be able to heat and apply confining pressure to the simulated core 11.
In the above description, the grouting port 241 and the slurry discharge port 242 are used to complete formation of a mud cake and a cement sheath in cooperation with a well cementing construction unit (described below). The second pressure application port 243 is used to simulate the internal casing pressure (i.e., the pressure in the casing at the center) under drilling, cementing and production conditions in conjunction with a pressure application unit (described below), and during actual drilling and cementing operations, a liquid column is present in the casing at the center to generate pressure, and the internal casing pressure is almost the same as the formation pressure during production. The first pressure application port 231 and the pressure release port 232 (for releasing the internal pressure of the casing) are used to perform experiments in cooperation with the pressure application unit. By heating the simulated core 11, both the formation temperature and the temperature required for setting of the cement slurry can be simulated. The simulated core 11 may be fabricated using a custom mold in accordance with the formation parameters (formation sand size distribution, porosity, permeability, strength) of the target work area.
In the foregoing, it will be appreciated that because the simulated tubing set 12 is comprised of at least two casings, at least two cement sheath layers may be formed within the simulated wellbore 10, thereby simulating a multi-open (e.g., three-open, four-open, five-open) wellbore configuration. Different simulated tube sets 12 and simulated cores 11 are selected for experiments with different structures. Such as the embodiment shown in fig. 1, for simulating a four-well configuration, the simulated tubing set 12 includes four casing layers from inside to outside, namely a production casing 121, a technical casing 122, a surface casing 123, and a conduit 124 (see fig. 4), the four casing layers decreasing in length from inside to outside, and the simulated wellbore 10 having four cement sheath layers formed therein. In practical application, the production casing 121 extends to the hydrocarbon producing layer, and an oil supply pipe can be inserted in the production casing 121; the technical casing 122 and the surface casing 123 are used to seal off complex layers such as creep-able salt-paste layers, high-pressure water layers, etc. encountered during drilling; the conduit 124 is used to seal off the water layer and gravel layer near the surface.
In addition, when the analog tube group 12 includes three or more sleeves, two or more second annular spaces 14 may be formed, and in this case, the autoclave 20 is provided with a plurality of discharge ports 242 communicating with the plurality of second annular spaces 14, respectively. For example, as shown in FIG. 1, the simulated tube bank 12 includes four sleeves forming three second annuli 14, and three ports 242 in one-to-one communication with the three second annuli 14 are provided on the autoclave 20.
Through the technical scheme, the device provided by the invention can simulate the working conditions of the multi-layer cement sheath in the multi-open multi-cementing-surface well cementation structure of the ultra-deep oil gas well, has high reliability of simulation results and strong engineering practicability, can be used for researching the change rule of the sealing performance of the multi-layer cement sheath in the multi-open multi-cementing-surface well cementation structure under different well completion modes and well body structure conditions, and realizes the accurate evaluation of the performance of the cement sheath under the complex working conditions in the well, thereby providing theoretical support for site construction and diagnosis.
In the present invention, to achieve the integrity of the simulated tube assembly 12 and facilitate its installation, a plurality of said casings are interconnected, as shown in FIG. 4, with the bottom end of the outer casing closed to the outer wall of the inner casing such that the bottom of the second annulus 14 is closed (which also simulates the cementing of the casings to each other in an actual hydrocarbon well). In order to realize the communication between the bottom end of the second annular space 14 and the first annular space 13, as shown in fig. 5, a plurality of first communication holes 125 may be formed at the bottom of each second annular space 14, and the plurality of first communication holes 125 are uniformly spaced along the circumferential direction of the second annular space 14, so that the drilling fluid or cement slurry stably and uniformly enters the second annular space 14, and the drilling fluid or cement slurry completely fills the first annular space 13 and the second annular space 14 and returns to the ground, thereby ensuring good well cementation quality.
In addition, the bottom of the production casing 121 may be provided with a second communication hole 126 (see fig. 5) communicating with the pressure relief port 232 on the autoclave 20.
The device can simulate perforation and open hole two well completion modes, under the condition of simulated perforation well completion, perforation is set when the simulated rock core 11 is manufactured, meanwhile, the production sleeve 121 is perforated at the corresponding position, and in the process of experiment, the cement sheath tightness test can be carried out on the perforation position as a pressurizing position so as to meet the fact that most of the initial failure points of the cement sheath are at the perforation position. As shown in fig. 1, perforations 111 are provided in the simulated core 11 in communication with the production casing 121, and the autoclave 20 is provided with third pressure-applying ports 233 in communication with the perforations 111. This is not required under simulated open hole completion conditions.
In the present invention, in order to uniformly apply confining pressure to the simulated core 11, the autoclave 20 may include a confining pressure sheath 21 disposed around the simulated core 11 within the cavity, and the autoclave 20 may be provided with confining pressure ports 211 communicating with the confining pressure sheath 21. In the experiment, confining pressure can be applied to the confining pressure gum cover 21 through the confining pressure port 211.
Preferably, as shown in fig. 1, the autoclave 20 may include a plurality of confining pressure jackets 21 arranged in the axial direction of the simulated core 11, and the autoclave 20 is provided with a plurality of confining pressure ports 211 respectively communicating with the plurality of confining pressure jackets 21. In this way, different confining pressures can be applied to different height positions of the simulated rock core 11 through the plurality of confining pressure rubber sleeves 21 which are mutually independent so as to simulate the pressure change of an actual stratum, and the cement sheath performance evaluation is more accurate.
In order to avoid the mutual influence between the plurality of the casing rubber sleeves 21, a partition 212 may be provided between adjacent casing rubber sleeves 21, see fig. 1. It will be appreciated that the spacer 212 is an annular plate that is sleeved outside the simulated core 11.
In the present invention, the autoclave 20 may heat the simulated core 11 in any suitable manner, and in order to achieve uniform heating of the simulated core 11, the apparatus may include a heating jacket 22 that is positioned around the simulated core 11, as shown in FIG. 1, outside the autoclave 20. The axial height of the heating jacket 22 is preferably close to the axial height of the simulated core 11 to cover the entire simulated core 11 in the axial direction, thereby more accurately simulating the formation temperature. The heating jacket 22 may be an electric heating jacket, which is fast and temperature-adjustable.
In other embodiments, an annular thin copper tube may be provided outside the autoclave 20, and heating may be performed by circulating hot water inside the copper tube.
In the present invention, the autoclave 20 may include a positioning structure for positioning the simulated core 11 and the simulated tube set 12 within the cavity. Through locating the simulated rock core 11 and the simulated tube group 12 in the accommodating cavity, the simulated rock core 11 and the simulated tube group 12 can be prevented from shifting in the experimental process, the smooth performance of the experiment is facilitated, and the accuracy of the experimental result is ensured.
In the present invention, as shown in fig. 1, the autoclave 20 may include a tank body 23 having an opening at the top and a cover 24 detachably sealing the opening, and the tank body 23 has the cavity therein. By using a split-type arrangement for autoclave 20, the installation and removal of simulated wellbore 10 may be facilitated. The cavity is cylindrical, and accordingly, the simulated rock core 11 is cylindrical, and the confining pressure rubber sleeve 21 is cylindrical, so that uniform pressure application of the simulated rock core 11 can be facilitated. The tank 23 is cylindrical with a closed bottom (the tank has a high pressure resistance), and the heating jacket 22 is cylindrical.
Based on the above-described construction of the autoclave 20, the positioning structure may include a positioning boss 234 extending upwardly from the bottom wall of the cavity into the simulated core 11 and supported at the bottom of the simulated tube set 12, as shown in fig. 1. That is, the positioning boss 234 may extend into a hole of the simulated core 11 into which the simulated tube set 12 is inserted, thereby radially limiting the simulated core 11 and axially limiting the simulated tube set 12. Wherein the bottom of the simulated tube set 12 is the bottom of the centrally located casing (i.e., production casing 121).
As shown in fig. 3, the positioning structure may further include a ring groove 244 provided on the bottom surface of the cover 24 for the top of the sleeve to be embedded. The annular groove 244 may cooperate with the locating boss 234 to axially retain the analog tube set 12. It will be appreciated that the number of grooves 244 corresponds to the number of sleeves and the size of the locations corresponds to each sleeve.
As shown in fig. 1, the positioning structure may further include an upper pressing sheet 25 sleeved outside the simulated tube set 12 and pressed between the cover 24 and the simulated core 11, and a lower pressing sheet 26 sleeved outside the positioning boss 234 and pressed between the bottom wall of the cavity and the simulated core 11. That is, the simulated core 11 is sandwiched between the upper and lower press sheets 25 and 26, and is axially limited. The upper pressing piece 25 and the lower pressing piece 26 can be made of rubber, so that the simulated rock core 11 can be fixed more firmly, the tightness among the cover body 24, the kettle body 23 and the simulated rock core 11 is improved, and the influence of the rough top surface and the rough bottom surface of the simulated rock core 11 on the tightness is avoided.
Of course, the positioning structure of the present invention is not limited to the above embodiment, and may be any structure capable of positioning the simulated core 11 and the simulated tube set 12 in the cavity.
In the above embodiment of the autoclave 20, in order to improve the sealability of the autoclave 20, the autoclave 20 may further include a gasket 27, and the gasket 27 is sealingly interposed between the cover 24 and the autoclave body 23. Specifically, as shown in fig. 2, the cover 24 includes a large round table located above and a small round table (the size refers to the diameter) protruding downward from the large round table, an annular groove into which the sealing ring 27 is embedded is provided on the outer peripheral surface of the small round table, when the cover 24 is covered on the kettle body 23, the small round table can extend into the top opening of the kettle body 23, and the sealing ring 27 is sealed between the small round table and the inner wall surface of the kettle body 23 (see fig. 1).
In the present invention, as shown in fig. 1, the autoclave 20 may further include a filter screen 28, where the filter screen 28 is sandwiched between the bottom of the analog tube set 12 and the positioning boss 234 to block slurry (e.g., cement slurry, drilling fluid) entering the first annulus 13, thereby ensuring smooth application of cement sheath pressure and core pressure.
In the present invention, the apparatus may further include a well cementing construction unit in communication with the grouting port 241 for injecting a drilling fluid into the first annulus 13 to form a mud cake on the inner wall of the simulated core 11, and for injecting a cement slurry into the first annulus 13 to form cement rings in the first annulus 13 and the second annulus 14. Of course, in order to achieve recycling of the slurry, the well cementing construction unit may also be in communication with the discharge port 242 to recover the slurry flowing out of the discharge port 242.
Specifically, as shown in fig. 6, the well cementing construction unit may include a mud tank 30 and a mud pump 31, wherein an outlet of the mud tank 30 is connected to an inlet of the mud pump 31, and an outlet of the mud pump 31 is connected to a grouting port 241. During the experiment, the slurry in the slurry tank 30 was pumped into the first annulus 13 by the slurry pump 31 through the grouting port 241, and after filling the first annulus 13 and the second annulus 14, the slurry was discharged through the slurry discharge port 242, and the slurry filling process was considered to be completed. Wherein, the connecting pipeline of the mud tank 30 and the mud pump 31 and the connecting pipeline of the mud pump 31 and the grouting port 241 can be respectively provided with valves F8 and F4, the connecting pipeline of the mud pump 31 and the grouting port 241 can be also provided with a flowmeter 32, and the mud tank 30 can be provided with a stirrer and a heater to ensure that the slurry has stable and reliable properties in the whole experimental process.
In addition, valves (such as valves F5-F7 shown in FIG. 6) may be provided on the lines outside each of the discharge ports 242 for on-off control.
In the invention, the device can further comprise a pressing unit, wherein the pressing unit is used for respectively applying pressure to the simulated rock core 11, the sleeve pipe positioned at the center and the cement sheath so as to simulate the underground complex pressure working condition.
The pressure applying unit can comprise a casing internal pressure control module, a core confining pressure control module, a cement sheath pressure control module and a pressure relief module.
Specifically, as shown in fig. 6, the casing internal pressure control module may include a first gas cylinder 33, a first gas booster pump 34, and a pressure regulating valve 35. The outlet of the first gas bottle 33 is connected to the inlet of the first gas booster pump 34, the outlet of the first gas booster pump 34 is connected to the inlet of the pressure regulating valve 35, and the outlet of the pressure regulating valve 35 is connected to the second pressure applying port 243. The pressure of the air source provided by the first air bottle 33 after being pressurized by the first air booster pump 34 and regulated by the pressure regulating valve 35 is the applied internal pressure of the sleeve. Wherein, a pressure gauge 36 may be disposed on the connection line between the pressure regulating valve 35 and the second pressure applying port 243 to monitor the internal pressure of the sleeve in real time, and valves F1 and F2 may be disposed to control the on-off of the line.
In addition, the casing internal pressure control module may further include a vent valve 43, the vent valve 43 is connected to the pressure regulating valve 35 and the second pressure applying port 243 through a tee 46, and a valve F3 may be disposed on a connection line between the vent valve 43 and the tee 46. Through the arrangement, the rapid pressure relief after the experiment is finished and the rapid pressure relief when the pressure abnormality occurs can be realized.
The core confining pressure control module may include a first water tank 37, a first liquid booster pump 38 and a pressure regulating valve 35, where an outlet of the first water tank 37 is connected to an inlet of the first liquid booster pump 38, an outlet of the first liquid booster pump 38 is connected to an inlet of the pressure regulating valve 35, and an outlet of the pressure regulating valve 35 is connected to a confining pressure port 211. In the experiment, the pressure of the distilled water provided by the first water tank 37 after being pressurized by the first liquid booster pump 38 is the confining pressure applied by the pressure regulating valve 35, and the high-pressure distilled water is filled into the confining pressure rubber sleeve 21 through the confining pressure port 211 to realize the confining pressure application to the simulated rock core 11. Wherein, a pressure gauge 36 may be disposed on the connection line between the pressure regulating valve 35 and the confining pressure port 211 to monitor confining pressure in real time.
When the autoclave 20 is provided with a plurality of confining pressure rubber sleeves 21, the pressure applying unit may correspondingly comprise a plurality of core confining pressure control modules, and the outlet of the pressure regulating valve 35 of each core confining pressure control module is connected to the corresponding confining pressure port 211 so as to respectively regulate the pressure of each confining pressure rubber sleeve 21, simulate the condition of the underground multi-pressure system, and enable the simulation to be more close to the actual working condition.
As shown in fig. 6, when the pressure applying unit includes a plurality of core confining pressure control modules, the plurality of core confining pressure control modules may share one first water tank 37 and be connected through a four-way 45, and respectively set different confining pressure parameters. In addition, valves F9-F12 can be arranged to control the on-off of each pipeline.
The cement sheath pressure control module may be divided into a perforated completion and an open hole completion, with pressure applied to the first and third pressure application ports 231 and 233, respectively. The cement sheath pressure control module can be divided into liquid phase pressurization and gas phase pressurization for full simulation so as to simulate production fluid of an oil well and a gas well respectively.
Specifically, as shown in fig. 6, the liquid phase pressurization may include a second water tank 41, a second liquid booster pump 42, and a pressure regulating valve 35, an outlet of the second water tank 41 being connected to an inlet of the second liquid booster pump 42, an outlet of the second liquid booster pump 42 being connected to an inlet of the pressure regulating valve 35; the gas phase pressurization may include a second gas cylinder 39, a second gas booster pump 40, and a pressure regulating valve 35, where an outlet of the second gas cylinder 39 is connected to an inlet of the second gas booster pump 40, and an outlet of the second gas booster pump 40 is connected to an inlet of the pressure regulating valve 35; the outlet of the pressure regulating valve 35 in liquid phase pressurization and the outlet of the pressure regulating valve 35 in gas phase pressurization are connected to the first pressure applying port 231 and the third pressure applying port 233 through the four-way 45. Wherein, the pressure gauge 36 and the flow meter 32 may be disposed on the connection line of the pressure regulating valve 35 with the first and third pressure applying ports 231 and 233. In addition, valves F13-F17 can be arranged to control the on-off of each pipeline.
When the liquid phase pressurization is adopted for the experiment, the pressure of the distilled water provided by the second water tank 41 after being pressurized by the second liquid booster pump 42 and regulated by the pressure regulating valve 35 is the applied cement sheath pressure or the formation pressure (i.e. the pressure applied to the simulated rock core 11). When the gas phase pressurization is adopted for experiments, the pressure regulated by the pressure regulating valve 35 after the gas supplied by the second gas cylinder 39 is pressurized by the second gas booster pump 40 is the applied cement sheath pressure or the stratum pressure.
As shown in fig. 6, the pressure relief module may include a back pressure valve 44 and a vent valve 43 in communication with the pressure relief port 232 for the primary purpose of venting the pressure in the casing. By setting the back pressure valve pressure, the pressure relief can be ensured under the condition of a certain pressure difference, and the experimental safety is ensured.
In the invention, the device can also comprise a data acquisition unit, wherein the data acquisition unit is used for acquiring pressure and channeling data of all positions of the cement sheath so as to detect the annular space with pressure and the channeling of the cement sheath interface.
In particular, the data acquisition unit may comprise a plurality of site-directed pressure gauges and a plurality of channeling detectors. For example, in the embodiment shown in fig. 1, the data acquisition unit includes 14 fixed-point pressure gauges P1 to P14 and 10 channeling detectors L5 to L14, where the fixed-point pressure gauges P1 to P4 are respectively disposed at the top of four cement rings to perform ring-air belt pressure detection; the fixed-point pressure gauges P7, P10 and P12 and the channeling detectors L7, L10 and L12 are respectively arranged at the bottoms of the three outer layers of cement rings, and the rest fixed-point pressure gauges and the channeling detectors are arranged at positions between the tops and the bottoms of the cement rings along the axial direction of the cement rings so as to detect the interface channeling of the cement rings. That is, the fixed-point pressure gauges P5-P14 and the channeling detectors L5-L14 are arranged along the two interfaces of the cement sheath (namely, the bottom, the center position and the inflection point connection of the cement sheath) for monitoring the changes of the interface pressure and the packing capacity in real time and determining whether the cement sheath is invalid, so that the study on the height position to which the cement sheath is invalid under different conditions is performed.
In the invention, in order to improve the experimental efficiency, the device can further comprise a control unit, wherein the control unit can be used for controlling the operation of the well cementation construction unit and the pressure applying unit and receiving the data acquired by the data acquisition unit.
Specifically, the control unit may be connected to the heating jacket 22, the slurry pump 31, the flow meter 32, the pressure gauge 36, the gas booster pump, the liquid booster pump, the pressure regulating valve 35, the valves F1 to F18, the fixed-point pressure gauges P1 to P14, and the channeling detectors L5 to L14, and control the flow rate, the pressure, the experimental temperature, and the like of the pumped fluid, and monitor and record all experimental parameters in real time.
The experiment performed by the apparatus of the present invention was a high-pressure experiment, and the autoclave 20 was a main component for ensuring the safety of the experiment, so that all the seals in the autoclave 20 were required to withstand high temperature and high pressure, and the autoclave body was resistant to 40MPa. In addition, the injection pressure of the gas and the liquid after being pressurized by the booster pump can reach tens of megapascals, so the pipe body and the connecting pipeline of the whole device are made of high-pressure materials.
The invention also provides a method for evaluating the performance of the cementing cement sheath with the multiple-open and multiple-cementing-surface of the oil-gas well, which is carried out by adopting the device.
The method for evaluating the performance of the multi-open multi-cementing-surface cementing cement sheath of the oil and gas well is described in detail below under the condition of simulating an open hole completion by combining with FIG. 6, and comprises the following steps:
determining parameters: determining experimental process parameters such as drilling fluid, cement slurry formulation, formation pressure, formation temperature, formation parameters and the like according to the actual conditions of the target work area;
the connecting device comprises: according to the experimental design requirement, manufacturing an experimental simulated rock core 11, and connecting and installing all the components;
and (3) air tightness detection: detecting the pressure bearing of a pipeline and the air tightness of the device, and determining that the pressure is in accordance with the safety experiment requirement when the pressure drop is 0 and the pressure is stabilized for 15min at 20 MPa;
Simulating formation of mud cakes, closing all valves, opening valves F5, F6 and F7, filling prepared drilling fluid into a mud tank 30, opening valves F4, F8 and a mud pump 31, injecting the drilling fluid into a first annulus 13 and a second annulus 14 until the drilling fluid overflows from a mud discharge port 242, closing all the valves, opening valves F16 and F14, opening a second gas cylinder 39 and a second gas booster pump 40, enabling the inner wall and the outer wall of a simulated rock core 11 to keep a certain pressure difference through corresponding pressure regulating valves 35, forming mud cakes with a certain thickness on the inner wall of the simulated rock core 11 after a period of time, closing all the valves, opening the valve F18 to remove all the drilling fluid, opening a cover 24, taking out the simulated rock core 11, and calculating to obtain the average mud cake thickness through mass change of the simulated rock core 11;
After all the components are installed in situ, all the valves are closed, only the valves F5, F6 and F7 are opened, the prepared cement paste is filled into a mud tank 30, the valves F4, F8 and a mud pump 31 are opened, cement paste is injected into a first annulus 13 and a second annulus 14 until the cement paste overflows from a paste discharge port 242, pumping is stopped, the valves F5, F6 and F7 are closed, then the valves F9-F12, F1-F2, F14 and F16 are opened, and setting is carried out according to the confining pressure, the casing internal pressure, the formation pressure and the formation temperature set before experiments (the pressure setting range is 0-35 MPa and the temperature adjusting range is 40-200 ℃), so that cement paste solidification under the simulated shaft working condition is realized, and the consistency of the internal pressure and the external pressure of the casing is kept to solidify cement paste into a cement collar within the set time;
simulating the formation of annular micro-cracks, closing all valves, opening the valve F18 to gradually relieve pressure, and simulating the pressure relief process of drilling again, wherein the internal pressure of the casing is gradually lower than the pressure outside the casing in the relief process, so that the casing is contracted and deformed to generate micro-cracks between the cement sheath and the casing;
Evaluating the performance of the cement sheath, closing all valves, opening valves F9-F12 and F1-F2, keeping a certain casing internal pressure and core confining pressure (the casing internal pressure can be determined according to actual drilling design, hydrostatic column pressure can be calculated according to drilling fluid density and well bore, core confining pressure can be calculated according to stratum pressure coefficient and well bore), opening valves F14 (or F13) and F16 to continuously increase the pressure exerted by the bottom of the cement sheath so as to continuously increase the pressure difference between the bottom and the top of the cement sheath, and recording pressure and channeling data in real time by all fixed-point pressure gauges and channeling detectors: when the pressure at a certain position between the top and the bottom of the cement sheath suddenly increases to the pressure applied by the bottom of the cement sheath and the channeling occurs at the position (namely when the indication of a certain fixed-point pressure gauge P5-P14 suddenly increases to the pressure applied by the bottom of the cement sheath and the channeling detector displays the channeling), the tightness of the position and the following parts is destroyed; when the pressure at a certain position between the top and the bottom of the cement sheath is increased but no channeling occurs at the position (namely when the indication numbers of the fixed-point pressure gauges P5-P14 are increased but the channeling is not displayed by the corresponding channeling detectors), the leakage flow of the pressure medium in the cement sheath is indicated to cause the leak tightness of the cement sheath to be broken; and when the pressure at the top of the cement sheath is increased (namely, the pressure readings of the fixed-point pressure gauges P1-P4 are increased) and the pressure is applied near the bottom of the cement sheath, the integral sealing performance of the cement sheath is invalid.
It will be appreciated that under normal conditions the cement sheath seal is good, no or very little pressure readings should be taken at P5 to P14, and that these gauge points will only be measured and will be close to the sheath bottom pressure if the sheath seal fails, i.e. pressure is blown up.
The method for evaluating the performance of the multi-open multi-cementing-surface cementing cement sheath of the oil and gas well under the condition of simulating perforation completion is basically consistent with the method under the condition of simulating open hole completion, and is mainly different from the method under the condition of simulating open hole completion in that:
Perforations 111 need to be arranged when the simulated rock core 11 is manufactured, and the main method is that holes are drilled in the simulated rock core 11, and the aperture depth and the size of the drilled holes can be controlled independently so as to simulate the perforations under different perforating charges and detonation pressure conditions; arranging perforation holes at corresponding positions of the production sleeve 121, wherein the hole sizes are consistent with the sizes of the perforations 111, after the production sleeve 121 is installed, overlapping the holes on the production sleeve 121 with the perforations 111, filling soft rubber columns with diameters consistent with the hole sizes into the holes for temporarily plugging the holes, and taking out the soft rubber columns after the cement sheath is solidified, so that an actual underground perforation structure can be simulated;
When evaluating the performance of the cement sheath, all valves are closed, valves F9-F12 and F1-F2 are opened, certain casing internal pressure and core confining pressure (the casing internal pressure can be determined according to actual drilling design, hydrostatic column pressure can be calculated according to drilling fluid density and well bore, core confining pressure can be calculated according to stratum pressure coefficient and well bore) are kept, the valves F14 (or F13) and F15 are opened to continuously increase the pressure exerted by the bottom of the cement sheath so as to continuously increase the pressure difference between the bottom and the top of the cement sheath, and all fixed-point pressure gauges and channeling detectors record pressure and channeling data in real time: when the pressure at a position between the top and the bottom of the cement sheath suddenly increases to the position where the pressure is applied to the perforation 111 and the channeling occurs (namely when the indication of a certain fixed-point pressure gauge P5-P14 suddenly increases to the position where the pressure is applied to the perforation 111 and the channeling is displayed by a corresponding channeling detector), the sealing performance of the cement sheath between the position and the perforation 111 is broken; when the pressure at a certain position between the top and the bottom of the cement sheath is increased but no channeling occurs at the position (namely when the indication numbers of the fixed-point pressure gauges P5-P14 are increased but the channeling is not displayed by the corresponding channeling detectors), the leakage flow of the pressure medium in the cement sheath is indicated to cause the leak tightness of the cement sheath to be broken; and when the pressure at the top of the cement sheath is increased (namely, the pressure readings of the fixed-point pressure gauges P1-P4 are increased) and the pressure is applied near the bottom of the cement sheath, the integral sealing performance of the cement sheath is invalid.
It will be appreciated that under normal conditions the cement sheath seal is good, no or very little pressure readings should be taken at P5 to P14, and that these gauge points will only be able to indicate and apply pressure near perforations 111 when the cement sheath seal fails, i.e., pressure is blown up.
The device and the method have the following beneficial effects: different well completion modes and formation complex pressure layer system conditions can be simulated, and the simulation of underground working conditions is truly realized; the multi-open multi-cementing-surface well cementation structure under different open times can be simulated, the change rule of the sealing performance of a plurality of cement rings in the multi-open multi-cementing-surface well cementation structure is researched, the failure working condition and the failure dangerous area of the cement rings are obtained, the effective sealing life of the cement rings is predicted (corrosive gas or acid liquid phase can be used for pressurizing, the corrosion of the cement rings under the working condition of a hydrogen sulfide well and a high mineralization stratum water oil well is simulated, the failure can be caused under different working conditions, the annular pressure condition of a gas well is considered, and the like; analyzing the failure reason of the cement sheath through experimental results, and accurately positioning and determining the initial failure point, failure length and channeling point of the cement sheath; the cement paste system can be optimized to high-performance cement paste systems under different working conditions, can be widely popularized and applied in the land oil gas development industry, and has high economic and technical values.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (12)
1. An oil gas well multi-open multi-cementing-surface well cementation cement sheath performance evaluation device, which is characterized by comprising:
a simulated wellbore (10), the simulated wellbore (10) comprising a simulated core (11) and a simulated tube set (12), the simulated tube set (12) being coaxially inserted within the simulated core (11) and having a radial clearance with the simulated core (11) to form a first annulus (13), the simulated tube set (12) comprising at least two casings coaxially sleeved with each other with a radial clearance therebetween to form a second annulus (14), the second annulus (14) communicating with the first annulus (13) at a bottom end;
An autoclave (20), the autoclave (20) having a cavity therein, the simulated wellbore (10) being disposed in the cavity, the autoclave (20) being provided with a grouting port (241) in communication with the first annulus (13), a drainage port (242) in communication with the second annulus (14), a first pressurizing port (231) in communication with the bottom of the first annulus (13), and a second pressurizing port (243) and a pressure relief port (232) in communication with the centrally located casing, the autoclave (20) being configured to heat and apply confining pressure to the simulated core (11); and
The device comprises a data acquisition unit, wherein the data acquisition unit is used for acquiring pressure and channeling data of cement sheath formed in a first annulus (13) and a second annulus (14), the data acquisition unit comprises a plurality of fixed-point pressure gauges and a plurality of channeling detectors, the top of each cement sheath is correspondingly provided with one fixed-point pressure gauge for ring-blank pressure detection, and the channeling detectors and the rest fixed-point pressure gauges are arranged along two interfaces of each cement sheath in a two-by-two combined way so as to perform cement sheath interface channeling detection.
2. The multi-open multi-cementing surface cement sheath performance evaluation device according to claim 1, wherein a perforation (111) communicated with the centrally located casing is arranged in the simulated core (11), and a third pressure application port (233) communicated with the perforation (111) is arranged in the autoclave (20).
3. The multi-open multi-cementing surface cement sheath performance evaluation device according to claim 1, wherein the autoclave (20) comprises a confining pressure rubber sleeve (21) which is positioned in the containing cavity and is arranged around the simulated core (11), and the autoclave (20) is provided with a confining pressure port (211) which is communicated with the confining pressure rubber sleeve (21).
4. A multi-open multi-cementing-face cement sheath performance evaluation apparatus for oil and gas wells according to claim 3, wherein the autoclave (20) comprises a plurality of said confining pressure rubber sleeves (21) arranged along the axial direction of the simulated core (11), and the autoclave (20) is provided with a plurality of said confining pressure ports (211) respectively communicating with a plurality of said confining pressure rubber sleeves (21).
5. The device for evaluating the performance of the multi-open multi-cementing-face cementing cement sheath for the oil and gas well according to claim 1, wherein the device comprises a heating jacket (22) sleeved outside the autoclave (20), and the heating jacket (22) is arranged around the simulated core (11).
6. The multi-open multi-cement sheath performance evaluation device of an oil and gas well according to claim 1, wherein the autoclave (20) comprises a positioning structure for positioning the simulated core (11) and the simulated tube set (12) within the cavity.
7. The multi-open multi-cementing surface well cementation cement sheath performance evaluation device according to claim 6, wherein the autoclave (20) comprises a kettle body (23) with an opening at the top and a cover body (24) with a detachable sealing cover arranged at the opening, the kettle body (23) is internally provided with the cavity, and the positioning structure comprises a positioning boss (234) which extends upwards from the bottom wall of the cavity to the simulated core (11) and is supported at the bottom of the simulated tube group (12) and a ring groove (244) which is arranged at the bottom surface of the cover body (24) and is used for embedding the top of the sleeve.
8. The multi-open multi-cementing surface cementing cement sheath performance evaluation device of claim 7, wherein the positioning structure further comprises an upper pressing sheet (25) sleeved outside the simulated tube group (12) and pressed between the cover body (24) and the simulated core (11) and a lower pressing sheet (26) sleeved outside the positioning boss (234) and pressed between the bottom wall of the cavity and the simulated core (11); and/or
The autoclave (20) comprises a sealing ring (27) and a filter screen (28), wherein the sealing ring (27) is clamped between the cover body (24) and the autoclave body (23), and the filter screen (28) is clamped between the bottom of the simulation tube set (12) and the positioning boss (234) so as to block slurry entering the first annular space (13).
9. The multi-open multi-cement sheath performance evaluation apparatus as claimed in any one of claims 1-8, wherein the apparatus comprises a cementing construction unit in communication with the grouting port (241) for injecting drilling fluid into the first annulus (13) to form a mud cake on the inner wall of the simulated core (11) and for injecting cement slurry into the first annulus (13) to form a cement sheath in the first annulus (13) and the second annulus (14).
10. The device for evaluating the performance of the multi-open multi-cementing surface cementing cement sheath of the oil and gas well according to claim 9, wherein the device comprises a pressing unit for respectively applying pressure to the simulated core (11), the sleeve positioned at the center and the cement sheath.
11. The device for evaluating the performance of the multi-open multi-cementing-face cementing cement sheath of the oil and gas well according to claim 10, wherein the device comprises a control unit, wherein the control unit is used for controlling the operation of the cementing construction unit and the pressure applying unit and receiving the data acquired by the data acquisition unit.
12. A method for evaluating the performance of a multi-open multi-cementing-surface cementing cement sheath of an oil-gas well, which is characterized in that the device for evaluating the performance of the multi-open multi-cementing-surface cementing cement sheath of the oil-gas well is adopted, and the method comprises the following steps:
Filling cement paste into the first annulus (13) and the second annulus (14), applying a preset confining pressure to the simulated rock core (11), applying a preset internal pressure to the casing at the center, applying a preset pressure to the first annulus (13), heating the simulated rock core (11) to a preset temperature, and curing and solidifying the cement paste in the first annulus (13) and the second annulus (14) into a cement collar;
Maintaining certain confining pressure and internal pressure, continuously increasing the pressure applied by the bottom of the cement sheath, and collecting and analyzing pressure and channeling data of the cement sheath at all positions: when the pressure at a certain position between the top and the bottom of the cement sheath suddenly increases to the pressure applied by the bottom of the cement sheath and the channeling occurs at the position, the tightness of the position and the lower part is destroyed; when the pressure at a certain position between the top and the bottom of the cement sheath is increased but no cross flow occurs at the certain position, the leakage flow of the pressure medium in the cement sheath is indicated to cause the sealing performance of the cement sheath to be damaged; and when the pressure at the top of the cement sheath is increased and pressure is applied near the bottom of the cement sheath, the overall tightness of the cement sheath is invalid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906198.5A CN114109362B (en) | 2020-09-01 | 2020-09-01 | Device and method for evaluating performance of multi-open multi-cementing-surface well cementation cement sheath of oil-gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906198.5A CN114109362B (en) | 2020-09-01 | 2020-09-01 | Device and method for evaluating performance of multi-open multi-cementing-surface well cementation cement sheath of oil-gas well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114109362A CN114109362A (en) | 2022-03-01 |
| CN114109362B true CN114109362B (en) | 2024-06-14 |
Family
ID=80360783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010906198.5A Active CN114109362B (en) | 2020-09-01 | 2020-09-01 | Device and method for evaluating performance of multi-open multi-cementing-surface well cementation cement sheath of oil-gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114109362B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114994291A (en) * | 2022-04-21 | 2022-09-02 | 中海石油(中国)有限公司 | Pressure-controlled well cementation process simulation evaluation device and method for ultrahigh-temperature high-pressure narrow-density window stratum |
| CN115522920B (en) * | 2022-11-24 | 2023-02-10 | 西南石油大学 | Test device for measuring gas-water double-layer perforation exploitation of tight sandstone gas reservoir |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593411A (en) * | 2017-01-10 | 2017-04-26 | 中国石油大学(北京) | Experimental device and method for airtightness of cement sheath and uplifting of casings |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7861609B2 (en) * | 2008-03-31 | 2011-01-04 | Halliburton Energy Services, Inc. | Apparatus for constructing a target core from unconsolidated sand and method for use of same |
| US20170096874A1 (en) * | 2014-03-21 | 2017-04-06 | Schlumberger Technology Corporation | Methods of designing cementing operations and predicting stress, deformation, and failure of a well cement sheath |
| CN204024635U (en) * | 2014-07-22 | 2014-12-17 | 中国石油大学(华东) | A kind of Oil/gas Well cement ring sealing characteristics simulating test device |
| CN104153760B (en) * | 2014-07-22 | 2016-08-24 | 中国石油大学(华东) | Oil/gas Well cement sheath sealing characteristics simulating test device and experimental technique |
| CN104500034B (en) * | 2014-12-29 | 2017-04-12 | 西南石油大学 | Device and method for evaluating influence of pressure change on completeness of cement sheath |
| CN106522923A (en) * | 2016-11-09 | 2017-03-22 | 中国石油大学(华东) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device |
| CN106771096B (en) * | 2016-12-09 | 2019-03-01 | 西南石油大学 | A kind of cementing concrete ring seal is every ability dynamic checkout unit and experimental method |
| CN112145155B (en) * | 2017-02-28 | 2022-04-15 | 中国地质大学（北京） | Experimental method of evaluation device capable of eccentrically testing cementing quality of first interface of well cementation |
| CN207296992U (en) * | 2017-09-06 | 2018-05-01 | 重庆科技学院 | The complete visual evaluating apparatus of shale gas well multistage fracturing cement sheath hermetic seal |
| CN108533209B (en) * | 2018-04-02 | 2020-07-10 | 中国石油天然气股份有限公司 | Device and method for determining volume stability of well cementation cement |
| CN108868746A (en) * | 2018-06-13 | 2018-11-23 | 中国石油大学(北京) | The anti-experimental provision and its experimental method for altering ability of test well cementation cement plane |
| CN111287731A (en) * | 2019-12-18 | 2020-06-16 | 大庆石油管理局有限公司 | Device and method for evaluating integrity of well cementation cement sheath |
-
2020
- 2020-09-01 CN CN202010906198.5A patent/CN114109362B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593411A (en) * | 2017-01-10 | 2017-04-26 | 中国石油大学(北京) | Experimental device and method for airtightness of cement sheath and uplifting of casings |
Non-Patent Citations (1)
| Title |
|---|
| 套管水泥环力学性能研究;张军;中国优秀硕士学位论文全文数据库 工程科技I辑(第05期);第24-36页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114109362A (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104153760B (en) | Oil/gas Well cement sheath sealing characteristics simulating test device and experimental technique | |
| CN107725030B (en) | Device and method for evaluating two-interface maintenance and cementing quality of well cementation under disturbance of formation water | |
| CN114109362B (en) | Device and method for evaluating performance of multi-open multi-cementing-surface well cementation cement sheath of oil-gas well | |
| CN201273190Y (en) | Triaxial-stress multi-pressure test point rock core reservoir simulation device | |
| CN204024635U (en) | A kind of Oil/gas Well cement ring sealing characteristics simulating test device | |
| CN112145155A (en) | Experimental method of evaluation device capable of eccentrically testing cementing quality of first interface of well cementation | |
| CN2884196Y (en) | High-temp. and high-pressure drilling fluid density testing device | |
| CN206233918U (en) | Oil/gas Well cement sheath sealing integrity test device | |
| CN207406332U (en) | The lower well cementation second interface maintenance of water flooding disturbance and bonding quality evaluating apparatus | |
| EP2193351A1 (en) | Measuring mechanical properties | |
| CN110593811B (en) | Cement sheath initial stress state monitoring experiment method | |
| CN111561281B (en) | Drilling fluid leak protection leaking stoppage effect evaluation experiment system | |
| CN112627783A (en) | Experimental device for improving gas injection recovery ratio through low-frequency pressure transformation | |
| CN114033360A (en) | Full-life-cycle shaft sealing integrity evaluation device and method | |
| EP3039239B1 (en) | Modular sensed annular well apparatus for cement testing | |
| CN107144469A (en) | Simulate the Hydraulic fracturing test instrument and method of impact high water head permeable liquid | |
| CN112049610B (en) | Device and method for testing dynamic change of parameters of various coal beds during seam gas well seam production | |
| CN107023287A (en) | The analogue experiment installation of deep water hydrocarbon well trapped pressure | |
| CN112796700A (en) | Experimental method for plugging performance of temporary plugging agent for fracturing | |
| CN112443288B (en) | Experimental device for evaluating sealing capacity of two interfaces of well cementation cement sheath | |
| CN110578494B (en) | Cement sheath initial stress state monitoring experiment device | |
| CN114060005B (en) | Underground gas storage pit shaft cement sheath tightness evaluation device | |
| CN109507103A (en) | A kind of envelope alters physical simulation experiment device and effect evaluation method | |
| CN110671087B (en) | Multi-scale crack two-phase flow simulation evaluating device | |
| CN111894572A (en) | Experimental device for considering interlayer interference temporary blocking and shunting effect and testing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240506 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Country or region after: China Applicant after: Sinopec Safety Engineering Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant before: CHINA PETROLEUM & CHEMICAL Corp. Country or region before: China Applicant before: SINOPEC Research Institute OF SAFETY ENGINEERING |
|
| GR01 | Patent grant |