CN115469078B - Device and method for measuring interaction with casing and stratum in solidification process of well cementation cement paste - Google Patents
Device and method for measuring interaction with casing and stratum in solidification process of well cementation cement paste Download PDFInfo
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Abstract
The invention relates to the technical field of petroleum drilling engineering, in particular to a device and a method for measuring interaction with a casing and a stratum in the solidification process of well cementation cement paste. The device for measuring the interaction with the casing and the stratum in the solidification process of the well cementation cement paste comprises a well shaft system, a temperature control system, a strain measurement system, a casing internal pressure control system, an upper pressure control system, a bottom pressure control system, a stratum pressure control system and a ground stress pressure control system. According to the invention, the waiting solidification of the well cementation cement paste can be carried out under the conditions of high temperature, high pressure, high formation pressure, high ground stress and the like according to the underground actual working condition, the interaction (force) between the cement paste and the sleeve and between the cement paste and the stratum can be measured in the cement paste solidification process, meanwhile, the stratum fluid (gas, water and oil) channeling experiment can be carried out in the cement paste solidification process, and the hydraulic packing capacity of the cement loop can be measured after the cement paste is solidified.
Description
Technical Field
The invention relates to the technical field of petroleum drilling engineering, in particular to a device and a method for measuring interaction with a casing and a stratum in the solidification process of well cementation cement paste.
Background
Well cementation is a vital link in the well construction process of an oil and gas well, because the well cementation cost is high and is about 20% -50% of the whole well construction cost, and the well cementation quality is directly related to success and failure of well construction, the service life of the well and the economic benefit of oil and gas field development. In recent years, with the continuous progress of exploration and development of China to deep stratum and ocean army, the investment cost of a single well is continuously increased, the well cementation cost is also continuously increased, and the importance of well cementation is also increasingly highlighted. Therefore, improving the quality of well cementation is the goal pursued by the driller of cumin.
During the cementing operation, cement slurry is injected and displaced into the annular space between the casing and the formation (wellbore) and then enters the waiting phase. In the waiting process, as the cement slurry is continuously hydrated until finally solidified to form cement, the interaction between the cement slurry (cement) and the casing and stratum is also continuously changed. In the initial stage of waiting to congeal, the grout is fluid state, and grout liquid column acts on sleeve pipe and stratum, and the interact force size between grout and sleeve pipe and the stratum equals grout liquid column pressure. Then, as the cement slurry is gradually hydrated, the cement slurry is gradually changed from a fluid state to a plastic state, the pressure of the cement slurry column is gradually reduced, and the interaction force between the cement slurry and the casing and the stratum is also gradually reduced. When the pressure of the cement slurry column is reduced below the formation pressure, formation fluid may infiltrate into cement slurry to generate a cross flow, and the cross flow pressure difference (the difference between the formation pressure and the cement slurry column pressure) and the cross flow channel form of the formation fluid are different when the cement slurry is in different solidification states. Until the waiting and setting operation is completed, the cement paste is set to form a solid cement sheath, and interaction (force) exists between the cement sheath and the casing and the stratum, and the interaction (force) between the solids has an important influence on the sealing capacity of the cement sheath. Therefore, the interaction of cement slurry, the casing and the stratum in the solidification process directly determines whether formation fluid channeling occurs in the waiting stage or not and the sealing capacity of the cement sheath after waiting is finished, and the knowledge of the interaction mechanism and the change of interaction force between the cement slurry and the casing and the stratum has important significance for preventing formation fluid channeling and improving the sealing capacity of the cement sheath.
The existing testing device and method are comprehensively analyzed, particularly the testing device related to cement slurry weightlessness, formation fluid channeling, cement ring packing property and the like, and can be found that some devices can test slurry column pressure and reduction thereof (namely cement slurry weightlessness) in the setting process of well cementation cement slurry, but the cement slurry is converted into a plastic state after being solidified for a period of time, the tested slurry column pressure is only fluid pressure after the cement slurry column weightlessness and is not completely equal to interaction force between the cement slurry and the casing and the stratum, and the devices cannot directly measure the interaction force between the cement slurry and the casing and the stratum. Some devices can simulate the crossflow of formation fluid in the cement slurry solidification process and test the crossflow pressure of the formation fluid, but cannot measure the interaction force between the cement slurry and the casing and the formation. Some devices can test the sealing capacity of cement rings after cement slurry solidification, but the devices cannot simulate the temperature and pressure environment of underground cement slurry solidification or cannot apply formation fluid pressure and ground stress in the cement slurry solidification process, so that the solidification condition of cement slurry is different from underground conditions to a certain extent, and the interaction between the cement slurry solidification process and the interaction between the cement slurry and the casing and the stratum are different from the actual situation. Therefore, the device and the method for researching the interaction between the cement paste and the casing and the stratum in the solidification process of the well cementation cement paste are very necessary, and have important significance for researching the interaction mechanism between the cement paste and the casing and the stratum and measuring the interaction force.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a device and a method for measuring interaction with a casing and a stratum in the solidification process of well cementing cement slurry, wherein the device and the method can be used for performing waiting solidification of the well cementing cement slurry under the conditions of high temperature, high pressure, high stratum pressure, high ground stress and the like according to the underground actual working condition, can be used for measuring interaction (force) with the casing and the stratum in the solidification process of the cement slurry, can be used for carrying out a fluid channeling experiment of stratum fluid (gas, water and oil) in the solidification process of the cement slurry, and can be used for measuring hydraulic packing capacity of a cement ring after the cement slurry is solidified.
In order to solve the technical problems, the invention adopts the following technical scheme:
an apparatus for measuring interactions with a casing and a formation during solidification of a well cementing slurry, the apparatus comprising a wellbore system, a temperature control system, a strain measurement system, a casing internal pressure control system, an upper pressure control system, a bottom pressure control system, a formation pressure control system, a ground stress pressure control system.
The shaft system comprises a base, wherein a simulation sleeve, a simulation well bore and a kettle body are sequentially sleeved on the base from inside to outside; a cavity I is arranged in the simulation sleeve, a cavity II is arranged between the simulation sleeve and the simulation well bore, and a cavity III is arranged between the kettle body and the simulation well bore; an upper inner cover is arranged above the cavity I and the cavity II; an upper outer cover is arranged above the cavity II and the cavity III, and the upper outer cover and the upper inner cover are overlapped and staggered.
The temperature control system comprises a temperature control device, wherein the temperature control device is connected with the heating tile and the temperature measuring sensor; the heating tile is arranged on the outer wall of the kettle body, and the temperature measuring sensor penetrates through the kettle body and stretches into the cavity III.
The strain measurement system comprises a simulated casing strain measurement system and a simulated borehole strain measurement system; the simulated sleeve strain measurement system comprises a strain measurement device I and a strain measurement sensor I which is arranged inside the simulated sleeve and connected with the strain measurement device I; the simulated wellbore strain measurement system comprises a strain measurement device II and a strain measurement sensor II which is arranged on the outer wall of the simulated wellbore and is connected with the strain measurement device II.
The casing internal pressure control system comprises a booster pump I, wherein the booster pump I is communicated with the bottom of a cavity I through a high-pressure pipeline I, and a valve I and a pressure gauge I are arranged on the high-pressure pipeline I; the upper pressure control system comprises a booster pump II, wherein the booster pump II is communicated with the upper part of the cavity II through a high-pressure pipeline II, and a valve II and a pressure gauge II are arranged on the high-pressure pipeline II; the bottom pressure control system comprises a booster pump III, the booster pump III is communicated with the bottom of the cavity II through a high-pressure pipeline III, and a valve III and a pressure gauge III are arranged on the high-pressure pipeline III; the stratum pressure control system comprises a booster pump IV, the booster pump IV is communicated with a cavity II through a high-pressure pipeline IV, and a valve IV and a pressure gauge IV are arranged on the high-pressure pipeline IV; the ground stress pressure control system comprises a booster pump V, wherein the booster pump V is communicated with a cavity III through a high-pressure pipeline V, and a valve V and a pressure gauge V are arranged on the high-pressure pipeline V.
In the invention, the sealing is realized between different cavities and between the cavities and the outside through the high-temperature-resistant high-pressure-resistant sealing ring. The fluid in the simulated casing and the fluid simulating the application of the ground stress can be water or oil medium resistant to high temperature and high pressure. The shaft system is used for realizing the solidification of cement paste under the conditions of high temperature, high pressure, high formation pressure and high ground stress.
The height of the wellbore system can be determined according to practical situations, and in order to facilitate experiments, the height is generally not more than 1m.
The dimensions of the simulated casing and the simulated wellbore may be full-scale casing and wellbore in situ or may be scaled down.
The temperature control system is used to heat and maintain a constant temperature for the wellbore system.
The strain measurement system comprises a simulated casing strain measurement system and a simulated wellbore strain measurement system for measuring simulated casing strain and simulated wellbore strain, respectively.
The casing internal pressure control system is primarily used to apply pressure to the casing interior space.
The upper pressure control system is mainly used for applying pressure to the upper space of cement paste (cement sheath).
The bottom pressure control system is primarily used to apply pressure to the cement sheath bottom space.
The formation pressure control system is mainly used for applying pressure to cement paste (cement sheath) to simulate formation pressure.
The ground stress pressure control system is mainly used for applying pressure to the outer side of the simulated well bore to simulate ground stress.
The invention also provides a method for measuring the interaction with the sleeve and the stratum in the solidification process of the well cementation cement slurry, which adopts the device for measuring the interaction with the sleeve and the stratum in the solidification process of the well cementation cement slurry and comprises the following steps:
(1-1) preparing cement slurry, and injecting the cement slurry into an annular cavity II between the simulation casing and the simulation borehole;
(1-2) injecting a fluid simulating the application of internal casing pressure into the cavity I, and injecting a fluid simulating the application of ground stress into the annular cavity III between the simulated wellbore and the tank body; the injected fluid can be water or oil medium resistant to high temperature and high pressure;
(1-3) sealing and installing an upper pressure control system;
(1-4) heating the kettle body and the internal system through a temperature control system until reaching a preset temperature and keeping constant; controlling the pressure in the casing, the ground stress, the formation pressure and the upper and lower pressures of cement paste to preset pressures; hydrating and solidifying the cement paste under the preset temperature and pressure conditions, namely waiting for solidification;
(1-5) after the temperature and pressure reach the preset temperature and pressure values, opening a strain measurement system to measure the strain of the simulated casing and the strain of the simulated borehole in the cement slurry waiting and setting process.
Parameters such as temperature, simulated casing size, simulated borehole size, casing pressure, formation pressure, ground stress and the like are changed, experiments are carried out to measure the magnitude of the interaction force under the condition of different parameters, and the change rule of the interaction force and the influence of the parameters on the interaction force are researched.
In the cement paste waiting and setting process, the method also comprises stratum fluid channeling experiments, and specifically comprises the following steps:
(2-1) shutting down the bottom pressure control system; the stratum pressure is kept unchanged through the stratum pressure control system, and the upper pressure is controlled to be slowly reduced according to a set speed through the upper pressure control system to simulate the weight loss of the cement paste column;
(2-2) when the pressure at the high-pressure pipeline IV is higher than the cement slurry pressure, the formation fluid invades into cement slurry to generate a cross flow, whether the cross flow occurs or not is judged through the change of the pressure at the high-pressure pipeline II at the upper part of the cement slurry, the reading of the pressure meter II is obviously increased during the cross flow, and the difference between the readings of the pressure meter IV and the pressure meter II at the moment is recorded as the cross flow pressure difference;
(2-3) continuing waiting until cement paste is solidified after the channeling occurs, then disassembling the device, cutting the cement ring, and observing the position, shape and size of the channeling channel.
After the cement paste waiting is completed, the cement paste sealing capacity measuring experiment is further included, and the concrete steps are as follows:
(3-1) closing the formation pressure control system after the cement paste is solidified to form a cement sheath;
(3-2) controlling the bottom pressure of the cement sheath to slowly rise by using a bottom pressure control system until the reading of a pressure meter II of a pressure control system at the upper part of the cement sheath rises, indicating that the bottom fluid breaks through the sealing of the cement sheath, and reading the difference between the readings of a bottom pressure meter III and the upper pressure meter II at the moment to obtain the sealing capacity of the cement sheath;
parameters such as temperature, simulated casing size, simulated borehole size, casing pressure, formation pressure, ground stress, temperature variation amplitude, casing pressure variation amplitude and the like are changed, experiments are carried out to measure cement sheath packing capacity under different parameters and variation conditions, and the influence of the variation of the parameters on the cement sheath packing capacity is researched.
Before the experiment is carried out, the device also comprises the following installation steps:
(0-1) installing a base, a lower high-temperature and high-pressure resistant sealing ring, a high-temperature and high-pressure resistant kettle body and a lower bolt, wherein in order to facilitate installation, an inverted installation method is adopted, namely, the high-temperature and high-pressure resistant kettle body is arranged below and the base is arranged above;
(0-2) installing a casing internal pressure control system;
(0-3) installing a bottom pressure control system;
(0-4) installing a ground stress pressure control system;
(0-5) installing a simulation sleeve and a high-temperature and high-pressure resistant sealing ring at the lower part of the simulation sleeve;
(0-6) installing a simulated wellbore and a high temperature and high pressure resistant sealing ring at the lower part of the simulated wellbore;
(0-7) installing a formation pressure control system;
(0-8) installing a simulated casing strain measurement system;
(0-9) installing a temperature control (heating) system.
The invention has the beneficial effects that: the invention has the maximum temperature of 250 ℃, the maximum internal pressure of the simulated casing can reach 80MPa, the maximum annular pressure between the simulated casing and the simulated borehole can reach 60MPa, the maximum simulated ground stress can reach 60MPa, the interaction (force) between the simulated casing and the stratum in the cement slurry solidification process can be measured according to the actual working condition, meanwhile, the stratum fluid (gas, water and oil) channeling experiment can be carried out in the cement slurry solidification process, and the hydraulic packing capacity of the cement sheath can be measured after the cement slurry is solidified.
Drawings
FIG. 1 is a schematic view of the structure of the device according to the present invention;
in the figure: 1-1 base, 1-2 simulation sleeve, 1-3 simulation borehole, 1-4 kettle body, 1-5 cavity I,1-6 cavity II,1-7 cavity III,1-8 upper inner cover, 1-9 upper outer cover;
2-1 of a temperature control device, 2-2 of a heating tile and 2-3 of a temperature measuring sensor;
a 3-1 strain measurement device I, a 3-2 strain measurement sensor I, a 3-3 strain measurement device II, a 3-4 strain measurement sensor II;
4-1 booster pump I,4-2 high pressure pipeline I,4-3 valve I,4-4 pressure gauge I;
5-1 booster pump II,5-2 high pressure pipeline II,5-3 valve II,5-4 pressure gauge II;
6-1 booster pump III,6-2 high pressure pipeline III,6-3 valve III,6-4 pressure gauge III;
7-1 booster pump IV,7-2 high pressure pipeline IV,7-3 valve IV,7-4 pressure gauge IV;
8-1 booster pump V,8-2 high pressure pipeline V,8-3 valve V,8-4 pressure gauge V.
Detailed Description
Example 1
A device for measuring interaction with a casing and a stratum in a well cementation cement slurry solidification process comprises a shaft system, a temperature control system, a strain measurement system, a casing internal pressure control system, an upper pressure control system, a bottom pressure control system, a stratum pressure control system and a ground stress pressure control system.
The shaft system comprises a base, wherein a simulation sleeve, a simulation well bore and a kettle body are sequentially sleeved on the base from inside to outside; a cavity I is arranged in the simulation sleeve, a cavity II is arranged between the simulation sleeve and the simulation well bore, and a cavity III is arranged between the kettle body and the simulation well bore; an upper inner cover is arranged above the cavity I and the cavity II; an upper outer cover is arranged above the cavity II and the cavity III, and the upper outer cover and the upper inner cover are overlapped and staggered.
The temperature control system comprises a temperature control device, wherein the temperature control device is connected with the heating tile and the temperature measuring sensor; the heating tile is arranged on the outer wall of the kettle body, and the temperature measuring sensor penetrates through the kettle body and stretches into the cavity III.
The strain measurement system comprises a simulated casing strain measurement system and a simulated borehole strain measurement system; the simulated sleeve strain measurement system comprises a strain measurement device I and a strain measurement sensor I which is arranged inside the simulated sleeve and connected with the strain measurement device I; the simulated wellbore strain measurement system comprises a strain measurement device II and a strain measurement sensor II which is arranged on the outer wall of the simulated wellbore and is connected with the strain measurement device II.
The casing internal pressure control system comprises a booster pump I, wherein the booster pump I is communicated with the bottom of a cavity I through a high-pressure pipeline I, and a valve I and a pressure gauge I are arranged on the high-pressure pipeline I; the upper pressure control system comprises a booster pump II, wherein the booster pump II is communicated with the upper part of the cavity II through a high-pressure pipeline II, and a valve II and a pressure gauge II are arranged on the high-pressure pipeline II; the bottom pressure control system comprises a booster pump III, the booster pump III is communicated with the bottom of the cavity II through a high-pressure pipeline III, and a valve III and a pressure gauge III are arranged on the high-pressure pipeline III; the stratum pressure control system comprises a booster pump IV, the booster pump IV is communicated with a cavity II through a high-pressure pipeline IV, and a valve IV and a pressure gauge IV are arranged on the high-pressure pipeline IV; the ground stress pressure control system comprises a booster pump V, wherein the booster pump V is communicated with a cavity III through a high-pressure pipeline V, and a valve V and a pressure gauge V are arranged on the high-pressure pipeline V.
Example 2
A method of measuring interactions with a casing and a formation during solidification of a well cementing slurry, employing the apparatus of example 1, comprising the steps of:
(1-1) preparing cement slurry, and injecting the cement slurry into an annular cavity II between the simulation casing and the simulation borehole;
(1-2) injecting a fluid simulating the application of internal casing pressure into the cavity I, and injecting a fluid simulating the application of ground stress into the annular cavity III between the simulated wellbore and the tank body; the injected fluid can be water or oil medium resistant to high temperature and high pressure;
(1-3) sealing and installing an upper pressure control system;
(1-4) heating the kettle body and the internal system through a temperature control system until reaching a preset temperature and keeping constant; controlling the pressure in the casing, the ground stress, the formation pressure and the upper and lower pressures of cement paste to preset pressures; hydrating and solidifying the cement paste under the preset temperature and pressure conditions, namely waiting for solidification;
(1-5) after the temperature and pressure reach the preset temperature and pressure values, opening a strain measurement system to measure the strain of the simulated casing and the strain of the simulated borehole in the cement slurry waiting and setting process.
Parameters such as temperature, simulated casing size, simulated borehole size, casing pressure, formation pressure, ground stress and the like are changed, experiments are carried out to measure the magnitude of the interaction force under the condition of different parameters, and the change rule of the interaction force and the influence of the parameters on the interaction force are researched.
Example 3
A method for measuring interactions with a casing and a formation during solidification of a well cementing slurry, using the apparatus for measuring interactions with a casing and a formation during solidification of a well cementing slurry of example 1, and performing a formation fluid channeling experiment during waiting for solidification of the slurry, comprising the steps of:
(1-1) preparing cement slurry, and injecting the cement slurry into an annular cavity II between the simulation casing and the simulation borehole;
(1-2) injecting a fluid simulating the application of internal casing pressure into the cavity I, and injecting a fluid simulating the application of ground stress into the annular cavity III between the simulated wellbore and the tank body; the injected fluid can be water or oil medium resistant to high temperature and high pressure;
(1-3) sealing and installing an upper pressure control system;
(1-4) heating the kettle body and the internal system through a temperature control system until reaching a preset temperature and keeping constant; controlling the pressure in the casing, the ground stress, the formation pressure and the upper and lower pressures of cement paste to preset pressures; hydrating and solidifying the cement paste under the preset temperature and pressure conditions, namely waiting for solidification;
(2-1) shutting down the bottom pressure control system; the stratum pressure is kept unchanged through the stratum pressure control system, and the upper pressure is controlled to be slowly reduced according to a set speed through the upper pressure control system to simulate the weight loss of the cement paste column;
(2-2) when the pressure at the high-pressure pipeline IV is higher than the cement slurry pressure, the formation fluid invades into cement slurry to generate a cross flow, whether the cross flow occurs or not is judged through the change of the pressure at the high-pressure pipeline II at the upper part of the cement slurry, the reading of the pressure meter II is obviously increased during the cross flow, and the difference between the readings of the pressure meter IV and the pressure meter II at the moment is recorded as the cross flow pressure difference;
(2-3) continuing waiting until cement paste is solidified after the channeling occurs, then disassembling the device, cutting the cement ring, and observing the position, shape and size of the channeling channel.
Example 4
A method for measuring interactions with a casing and a stratum in the solidification process of well cementing cement slurry, a cement sheath packing capacity measurement experiment is carried out by adopting the device for measuring interactions with the casing and the stratum in the solidification process of well cementing cement slurry, which comprises the following steps:
(1-1) preparing cement slurry, and injecting the cement slurry into an annular cavity II between the simulation casing and the simulation borehole;
(1-2) injecting a fluid simulating the application of internal casing pressure into the cavity I, and injecting a fluid simulating the application of ground stress into the annular cavity III between the simulated wellbore and the tank body; the injected fluid can be water or oil medium resistant to high temperature and high pressure;
(1-3) sealing and installing an upper pressure control system;
(1-4) heating the kettle body and the internal system through a temperature control system until reaching a preset temperature and keeping constant; controlling the pressure in the casing, the ground stress, the formation pressure and the upper and lower pressures of cement paste to preset pressures; hydrating and solidifying the cement paste under the preset temperature and pressure conditions, namely waiting for solidification;
(3-1) closing the formation pressure control system after the cement paste is solidified to form a cement sheath;
(3-2) controlling the bottom pressure of the cement sheath to slowly rise by using a bottom pressure control system until the reading of a pressure gauge II of the upper pressure control system of the cement sheath rises, and reading the difference between the readings of a bottom pressure gauge III and an upper pressure gauge II at the moment to obtain the sealing capacity of the cement sheath;
and (3-3) changing parameters such as temperature, simulated casing size, simulated borehole size, casing pressure, formation pressure, ground stress, temperature variation amplitude, casing pressure variation amplitude and the like, carrying out experiments to measure cement sheath packing capacity under different parameters and variation conditions, and researching the influence of the variation of the parameters on the cement sheath packing capacity.
Claims (5)
1. A device for measuring interaction with a casing and a stratum in the solidification process of well cementation cement paste, which is characterized by comprising a shaft system, a temperature control system, a strain measurement system, a casing internal pressure control system, an upper pressure control system, a bottom pressure control system, a stratum pressure control system and a ground stress pressure control system;
the strain measurement system comprises a simulated casing strain measurement system and a simulated borehole strain measurement system; the simulated sleeve strain measurement system comprises a strain measurement device I and a strain measurement sensor I which is arranged inside the simulated sleeve and connected with the strain measurement device I; the simulated wellbore strain measurement system comprises a strain measurement device II and a strain measurement sensor II which is arranged on the outer wall of the simulated wellbore and connected with the strain measurement device II;
the shaft system comprises a base, wherein a simulation sleeve, a simulation well bore and a kettle body are sequentially sleeved on the base from inside to outside; a cavity I is arranged in the simulation sleeve, a cavity II is arranged between the simulation sleeve and the simulation well bore, and a cavity III is arranged between the kettle body and the simulation well bore; an upper inner cover is arranged above the cavity I and the cavity II; an upper outer cover is arranged above the cavity II and the cavity III, and the upper outer cover and the upper inner cover are overlapped and staggered;
the casing internal pressure control system comprises a booster pump I, wherein the booster pump I is communicated with the bottom of a cavity I through a high-pressure pipeline I, and a valve I and a pressure gauge I are arranged on the high-pressure pipeline I; the upper pressure control system comprises a booster pump II, wherein the booster pump II is communicated with the upper part of the cavity II through a high-pressure pipeline II, and a valve II and a pressure gauge II are arranged on the high-pressure pipeline II; the bottom pressure control system comprises a booster pump III, the booster pump III is communicated with the bottom of the cavity II through a high-pressure pipeline III, and a valve III and a pressure gauge III are arranged on the high-pressure pipeline III; the stratum pressure control system comprises a booster pump IV, the booster pump IV is communicated with a cavity II through a high-pressure pipeline IV, and a valve IV and a pressure gauge IV are arranged on the high-pressure pipeline IV; the ground stress pressure control system comprises a booster pump V, wherein the booster pump V is communicated with a cavity III through a high-pressure pipeline V, and a valve V and a pressure gauge V are arranged on the high-pressure pipeline V.
2. The apparatus for measuring interactions with a casing and a formation during setting of a well cementing slurry of claim 1, wherein the temperature control system comprises a temperature control device coupled to a heating tile and a temperature measurement sensor; the heating tile is arranged on the outer wall of the kettle body, and the temperature measuring sensor penetrates through the kettle body and stretches into the cavity III.
3. A method of measuring interactions with a casing and a formation during solidification of a well cementing slurry, characterized in that an apparatus for measuring interactions with a casing and a formation during solidification of a well cementing slurry according to any one of claims 1-2 is used, comprising the steps of:
(1-1) preparing cement slurry, and injecting the cement slurry into an annular cavity II between the simulation casing and the simulation borehole;
(1-2) injecting a fluid simulating the application of internal casing pressure into the cavity I, and injecting a fluid simulating the application of ground stress into the annular cavity III between the simulated wellbore and the tank body; the injected fluid may be water or oil;
(1-3) sealing and installing an upper pressure control system;
(1-4) heating the kettle body and the internal system through a temperature control system until reaching a preset temperature and keeping constant; controlling the pressure in the casing, the ground stress, the formation pressure and the upper and lower pressures of cement paste to preset pressures; hydrating and solidifying the cement paste under the preset temperature and pressure conditions, namely waiting for solidification;
(1-5) after the temperature and pressure reach the preset temperature and pressure values, opening a strain measurement system to measure the strain of the simulated casing and the strain of the simulated borehole in the cement slurry waiting and setting process.
4. A method of measuring interactions with a casing and a formation during setting of a well cementing slurry according to claim 3, further comprising formation fluid channeling experiments during waiting of the slurry, comprising the steps of:
(2-1) shutting down the bottom pressure control system; the stratum pressure is kept unchanged through the stratum pressure control system, and the upper pressure is controlled to be slowly reduced according to a set speed through the upper pressure control system to simulate the weight loss of the cement paste column;
(2-2) when the pressure at the high-pressure pipeline IV is higher than the cement slurry pressure, the formation fluid invades into cement slurry to generate a cross flow, whether the cross flow occurs or not is judged through the change of the pressure at the high-pressure pipeline II at the upper part of the cement slurry, the reading of the pressure meter II is obviously increased during the cross flow, and the difference between the readings of the pressure meter IV and the pressure meter II at the moment is recorded as the cross flow pressure difference;
(2-3) continuing waiting until cement paste is solidified after the channeling occurs, then disassembling the device, cutting the cement ring, and observing the position, shape and size of the channeling channel.
5. A method for measuring interactions with a casing and a formation during setting of a well cementing slurry according to claim 3, further comprising the step of measuring the packing capacity of the cement annulus after completion of the slurry setting:
(3-1) closing the formation pressure control system after the cement paste is solidified to form a cement sheath;
and (3-2) controlling the bottom pressure of the cement sheath to slowly rise by using a bottom pressure control system until the reading of a pressure gauge II of the upper pressure control system of the cement sheath rises, and reading the difference between the readings of a bottom pressure gauge III and an upper pressure gauge II at the moment to obtain the sealing capacity of the cement sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210875009.1A CN115469078B (en) | 2022-07-25 | 2022-07-25 | Device and method for measuring interaction with casing and stratum in solidification process of well cementation cement paste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210875009.1A CN115469078B (en) | 2022-07-25 | 2022-07-25 | Device and method for measuring interaction with casing and stratum in solidification process of well cementation cement paste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115469078A CN115469078A (en) | 2022-12-13 |
| CN115469078B true CN115469078B (en) | 2023-10-20 |
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Citations (7)
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| CN104153760A (en) * | 2014-07-22 | 2014-11-19 | 中国石油大学(华东) | Oil-gas well cement sheath seal characteristic simulation test device and test method |
| CN104405366A (en) * | 2014-10-22 | 2015-03-11 | 西南石油大学 | Device and method for testing mechanical integrity of high-temperature high-pressure well cementation 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 |
| CN109781604A (en) * | 2019-02-20 | 2019-05-21 | 中国海洋石油集团有限公司 | Method is altered in a kind of survey of cement slurry |
| CN110593811A (en) * | 2019-09-06 | 2019-12-20 | 中国石油大学(北京) | Cement sheath initial stress state monitoring experiment method |
| CN112253086A (en) * | 2020-10-15 | 2021-01-22 | 中国石油大学(华东) | Device and method for measuring initial acting force of well cementation |
| CN112523746A (en) * | 2019-09-17 | 2021-03-19 | 中国石油化工股份有限公司 | Cement sheath sealing test device for simulating real stratum interface conditions |
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| CN104153760A (en) * | 2014-07-22 | 2014-11-19 | 中国石油大学(华东) | Oil-gas well cement sheath seal characteristic simulation test device and test method |
| CN104405366A (en) * | 2014-10-22 | 2015-03-11 | 西南石油大学 | Device and method for testing mechanical integrity of high-temperature high-pressure well cementation 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 |
| CN109781604A (en) * | 2019-02-20 | 2019-05-21 | 中国海洋石油集团有限公司 | Method is altered in a kind of survey of cement slurry |
| CN110593811A (en) * | 2019-09-06 | 2019-12-20 | 中国石油大学(北京) | Cement sheath initial stress state monitoring experiment method |
| CN112523746A (en) * | 2019-09-17 | 2021-03-19 | 中国石油化工股份有限公司 | Cement sheath sealing test device for simulating real stratum interface conditions |
| CN112253086A (en) * | 2020-10-15 | 2021-01-22 | 中国石油大学(华东) | Device and method for measuring initial acting force of well cementation |
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