CN212228694U - Oil field SRB bacterial growth characteristic and corrosion simulator - Google Patents
Oil field SRB bacterial growth characteristic and corrosion simulator Download PDFInfo
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- CN212228694U CN212228694U CN202020909356.8U CN202020909356U CN212228694U CN 212228694 U CN212228694 U CN 212228694U CN 202020909356 U CN202020909356 U CN 202020909356U CN 212228694 U CN212228694 U CN 212228694U
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Abstract
The utility model discloses an oil field SRB bacteria growth characteristic and corrosion simulator, which at least comprises two sets of high-pressure reaction kettle devices, a set of air expelling system and a set of liquid medium replacing system, wherein the air expelling system and the liquid medium replacing system are respectively communicated with the first set of high-pressure reaction kettle device, and the two sets of high-pressure reaction kettle devices are sequentially communicated; the device comprises a first high-pressure reaction kettle device, a second high-pressure reaction kettle device, a third high-pressure reaction kettle device, a fourth high-pressure reaction kettle device and a fifth high-pressure reaction kettle device, wherein the first high-pressure reaction kettle device is arranged in the kettle bodies and is used for replacing air in the kettle bodies through an air expelling system to keep; the coupon sample in the kettle body of the second high-pressure reaction kettle device is opposite to the first high pressureH generated by reaction kettle body of kettle device2S aggressive gas H2And (5) S stress corrosion testing. The utility model discloses the research of corrosion rate, the stress corrosion action of metal tubular product under SRB bacterial growth characteristic and effect under the simulation oil field production operating mode condition.
Description
Technical Field
The utility model relates to a test and research of Sulfate Reducing Bacteria (SRB) growth characteristic and metal tubular product corrosion rate, stress corrosion action under its effect, especially an experimental apparatus of oil field SRB bacterial growth characteristic and corrosion simulation in oil well, pipeline, the internal oily water medium production environment of jar.
Background
In oil field development and production, the oil recovery rate is improved by mostly adopting a water injection secondary oil recovery technology, a plurality of oil fields in China enter the middle and later development stages, the water content in produced liquid is greatly improved, and the produced liquid contains a large amount of aggressive substances such as CO2、H2S, dissolving O2、SO4 2-、Cl-And iron bacteria, saprophytic bacteria, Sulfate Reducing Bacteria (SRB), and the like. Under the anaerobic and closed environment, the anaerobic SRB bacteria are easy to breed in oil wells, pipelines, tanks or poor-fluidity equipment, and hydrogenase of the SRB bacteria can promote SO in the medium4 2-Reduction to S2-Generation of H2S, the cathode depolarization reaction and hydrogen sulfide corrosion are promoted, metal facilities such as oil field ground conveying pipelines, field station inner tank bodies and equipment are corroded to different degrees, pipe corrosion failure and even sulfide stress corrosion occur frequently in severe cases, accidents occur frequently, huge economic loss is brought, and potential hazards of oil field safety and environmental protection are caused. At present, the simplest mode of a tablet hanging weight loss method in a wide-mouth bottle is generally adopted for researching SRB bacterial corrosion or a tablet hanging weight loss method in a high-pressure reaction kettle is adopted for some SRB bacterial corrosion researches, but the former can not effectively ensure an anaerobic test environment and can not control pressure, while the latter can meet test conditions of certain temperature, pressure and deoxidization, but can not replace a test medium containing an SRB bacterial culture medium in a longer test period and is inconvenient to sample and analyze the SRB bacterial culture medium at certain test time intervals, so that the SRB bacterial corrosion researches can not be carried out under the condition close to the production environmentAnd (4) relatively accurate corrosion test.
Therefore, an experimental device for developing the growth characteristics, corrosion rules and characteristics of SRB bacteria under the condition of simulating the working conditions of the oil field is developed, and a test method of the experimental device is explained to obtain the corrosion rate and sulfide stress corrosion of a coupon sample and test the SRB and S in a liquid phase medium2-、SO4 2-Equal content and humidity and H in gas phase2The S gas content has extremely important academic value and engineering significance for the SRB bacterial corrosion control of the oil field.
SUMMERY OF THE UTILITY MODEL
For solving the above-mentioned defect that exists among the prior art, the utility model aims to provide an experimental apparatus of SRB bacterial growth characteristic in oil field and corrosion simulation for carry out the research of SRB bacterial growth characteristic and the corrosion rate of metal tubular product under the effect, stress corrosion action under the simulation oil field production operating mode condition, also can test SRB in the liquid phase medium under this simulation operating mode condition simultaneously, S2-、SO4 2-Equal content and humidity and H in gas phase2And the S gas content provides a reference basis for corrosion control of the metal pipe in the oil field production process.
The utility model discloses a realize through following technical scheme.
According to the embodiment of the utility model, the oil field SRB bacteria growth characteristic and corrosion simulator at least comprises two sets of high-pressure reaction kettle devices, an air expelling system and a liquid medium replacing system, wherein the air expelling system and the liquid medium replacing system are respectively communicated with the first high-pressure reaction kettle device, and the two sets of high-pressure reaction kettle devices are sequentially communicated; wherein:
the air expelling system is communicated with N2Gas system, transport N2Gas displaces air in the kettle bodies of the two sets of high-pressure reaction kettle devices;
the liquid medium replacing system is communicated with an experimental solution system containing an SRB culture medium, and conveys the liquid medium with the SRB culture medium to be introduced into the kettle body of the first high-pressure reaction kettle device;
the high-pressure reaction kettle device is internally provided with a kettle bodyThe first high-pressure reaction kettle device is used for replacing air in the kettle body through an air expelling system to keep an anaerobic environment, and a corrosion rate test of a coupon sample in a liquid phase environment is carried out; the second high-pressure reaction kettle device simultaneously carries out H generated by the kettle body of the first high-pressure reaction kettle device on the coupon sample in the kettle body2Corrosion rate test of S-aggressive gas phase environment and H2And (5) S stress corrosion testing.
In the technical scheme of the utility model, the first high-pressure reaction kettle device comprises a kettle body, a kettle cover, a thermocouple, a safety valve, a pressure gauge, a thermometer and a liquid phase environment corrosion hanging piece device; the thermocouple is arranged in a jacket on the side wall of the kettle body, a kettle cover is covered on the top of the kettle body, a safety valve, a pressure gauge and a thermometer which extend into the kettle body are arranged on the kettle cover, a discharge port is also arranged at the bottom of the kettle body, and a waste liquid collecting tank is arranged at the bottom; the kettle body is filled with a liquid medium which is prepared with an SRB culture medium in advance.
In the technical scheme of the utility model, second high-pressure reaction cauldron device includes the cauldron body, kettle cover, thermocouple, relief valve, pressure gauge, thermometer, hygrometer, H2The device comprises an S detector, a gas phase environment corrosion coupon device and a gas phase environment stress corrosion experimental device; the kettle cover is provided with an exhaust port, the bottom of the kettle body is provided with a discharge port, and the bottom of the kettle body is provided with a tail gas absorption groove.
The utility model discloses among the technical scheme, the internal liquid phase environment of first high-pressure batch autoclave device cauldron corrodes coupon device and the internal gaseous phase environment of second high-pressure batch autoclave device cauldron corrodes coupon device, all including locating the screw connecting rod on the kettle cover, screw connecting rod's lower extreme connection sample frame, sample frame are discoid, a plurality of coupon sample of disc lateral wall equipartition.
The utility model discloses among the technical scheme, the internal gaseous phase environment stress corrosion experimental apparatus of second high-pressure batch autoclave device cauldron, it is placed in the below of gaseous phase environment corrosion lacing film device, installs the stress corrosion sample on its sample frame through four-point bending test method to the required stress of loading.
The utility model discloses among the technical scheme, the liquid medium replacement system is including locating the liquid storage tank body on the gyro wheel support frame, and it has liquid medium to pour into in the liquid storage tank body, is equipped with the gas vent on the liquid storage tank body, and the liquid storage tank body stretches into to the first high pressure batch autoclave device cauldron body through liquid conduit.
In the technical scheme of the utility model, drive away air system and include the N in the cauldron body that communicates to first high-pressure batch autoclave device through gas conduit2Gas cylinder, N2The gas cylinder is communicated to the liquid storage tank body through the tee joint and the other path.
The utility model discloses owing to take above technical scheme, it has following beneficial effect:
1) the utility model discloses because adopt two conjuncted autoclave bodies to develop simulation oil field SRB bacterial corrosion test, can realize simultaneously that the lacing film of different materials corrodes speed test and stress corrosion action test under liquid phase and the gaseous phase environment, can also pass through cauldron body discharge port at any time sample test SRB bacterium, S2-、SO4 2-The content is equal and the change rule in the liquid medium is mastered, which is helpful for better explaining the corrosion behavior and characteristics.
2) The utility model discloses owing to adopted the liquid medium to change the system and driven away air system, can realize that the growth of SRB bacterium breeds in the liquid medium and be in anaerobic environment at long-term test in-process, ensure scientific nature and the validity of research SRB bacterial corrosion.
The utility model discloses the basic research of evaluation such as corrosion inhibitor, coating under the corrosion action of material such as tubular column, ground pipeline, jar body and corresponding condition under the operating mode environment that can be applicable to the oil field contains the SRB bacterium has experimental apparatus and test method that the operation is simple and easy, research is reliable.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:
FIG. 1 is a schematic structural diagram of an experimental apparatus for simulating growth characteristics and corrosion of SRB bacteria in an oil field;
FIG. 2 is a SRB growth characteristic curve of a corrosion simulation experiment;
FIG. 3 is SO of corrosion simulation experiment4 2-Ions and S2-The change rule of the ions along with the test time;
FIG. 4 is a comparison of corrosion rates of corrosion simulation experiments.
In the figure: 1-supporting table, 2-first autoclave body, 3-kettle cover, 4-thermocouple, 5-safety valve, 6-pressure gauge, 7-thermometer, 8-spiral connecting rod, 9-first sample rack, 10-coupon sample, 11-discharge port, 12-waste liquid collecting tank, 13-first gas conduit, 14-second autoclave body, 15-hygronom, 16-H2S detector, 17-first exhaust port, 18-second sample holder, 19-stress corrosion sample, 20-plastic hose, 21-tail gas absorption tank, 22-N2The gas cylinder, 23-a pressure reducing valve, 24-a second gas conduit, 25-a regulating valve, 26-a tee joint, 27-a stop valve, 28-a roller support frame, 29-a liquid storage tank body, 30-a second gas outlet, 31-a liquid medium and 32-a liquid conduit.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.
As shown in figure 1, the experimental device for simulating the growth characteristics and corrosion of the SRB bacteria in the oil field comprises two sets of high-pressure reaction kettle devices, an air expelling system and a liquid medium replacing system; wherein, two sets of high-pressure reaction kettle devices are communicated in sequence and are arranged on the supporting platform 1, and the air expelling system and the liquid medium replacing system are respectively communicated with the first high-pressure reaction kettle device.
The first high-pressure reaction kettle device comprises a first high-pressure kettle body 2, a kettle cover 3, a thermocouple 4, a safety valve 5, a pressure gauge 6, a thermometer 7 and a corrosion hanging piece device; the thermocouple 4 is arranged in a jacket on the side wall of the first high-pressure autoclave body, the top of the first high-pressure autoclave body 2 is covered with a kettle cover 3, the kettle cover 3 is provided with a safety valve 5, a pressure gauge 6 and a thermometer 7 which extend into the first high-pressure autoclave body, the bottom of the first high-pressure autoclave body is also provided with a discharge port 11, and a waste liquid collecting tank 12 is arranged right below the discharge port; the first autoclave body 2 contains a liquid medium 31 pre-configured with SRB medium, wherein the medium is controlled to reach the test temperature by a thermocouple 4.
Still including locating on the kettle cover 3 and stretching into the liquid phase environment of the first autoclave body and corroding the lacing film device, the liquid phase environment corrodes the lacing film device including locating the threaded connection pole 8 on the kettle cover 3, and first sample frame 9 is connected to the lower extreme of threaded connection pole, and first sample frame is discoid, and lateral wall evenly distributed has six lacing film grooves to through insulating screw with fixed lacing film sample 10.
The liquid medium replacing system comprises a roller supporting frame 28, a liquid storage tank body 29, a second exhaust port 30, a liquid medium 31, a liquid conduit 32 and corresponding stop valves and regulating valves. The liquid storage tank 29 is arranged on the roller support frame 28, and the liquid storage tank 29 extends into the kettle cover 3 through a liquid conduit 32 and is communicated with the first autoclave body 2. Wherein the liquid medium 31 contained in the liquid storage tank 29 is a newly prepared test solution containing the SRB culture medium before the medium in the first autoclave body 2 is replaced, and the liquid conduit 32 is used for guiding the liquid medium 31 prepared in advance with the SRB culture medium from the liquid storage tank 29 into the first autoclave body 2.
Wherein the air-expelling system comprises N2Gas cylinder 22, pressure reducing valve 23, second gas conduit 24, regulating valve 25, three-way valve 26 and stop valve 27, N2The gas bottle 22 penetrates through the kettle cover 3 through a second gas conduit 24 and is communicated with the first autoclave body 2, N2The gas bottle 22 is communicated to the liquid storage tank body 29 through a tee joint and the other path. The second gas conduit 24 is a conduit for N2In gas cylinder 22N2The gas is conducted into the first autoclave body 2 to expel the air therein and adjust the pressure in the autoclave body to reach the experimental design pressure.
The device also comprises a first gas conduit 13 which is arranged on the kettle cover 3 and extends into the first autoclave body 2, and the first gas conduit 13 controls the conduction of a second autoclave body 14 through a stop valve.
The second high-pressure reaction kettle device comprises a second high-pressure kettle body 14, a kettle cover 3, a thermocouple 4, a safety valve 5, a pressure gauge 6, a thermometer 7, a hygrograph 15 and a H2S detector 16, gas phase environment corrosion coupon device and gas phase environment stress corrosion experimental device; the kettle cover is provided with a first exhaust port 17 for removing air in the kettle body before the experiment; the bottom of the kettle body is also provided with a discharge port 11 which is connected with a plasticThe feed hose 20 extends into an exhaust gas absorption tank 21 disposed immediately below the feed hose. The gas phase environment corrosion coupon device and the liquid phase environment corrosion coupon device in the first high-pressure kettle are used for testing H-containing2S corrosion behavior in a wet environment. The gas phase environmental stress corrosion experimental device comprises a second sample holder 18 with standard specification and a stress corrosion sample 19. The stress corrosion experiment is carried out because SRB bacteria can generate H in the closed anoxic environment in the first autoclave body 22S aggressive gas is conducted into the second autoclave body 14 to reflect H generation of the sample2S stress corrosion behavior.
Wherein, in the air purge system, the pressure reducing valve 23, the regulating valve 25, the three-way valve 26 and the shutoff valve 27 are used for controlling N2High pressure N in gas cylinder2Air in the two kettle bodies before the experiment is cleaned by gas, and air in the liquid storage tank body 29 is cleaned by gas, so that the two autoclave bodies and the liquid storage tank body are both in an anaerobic state in the experiment process, and the anaerobic environment for SRB bacterial growth is met. In addition, the air-tight structure of the whole experimental device can be checked before the experiment, and H generated by SRB bacteria in the system can be eliminated after the experiment2And S enters a tail gas treatment device.
The liquid medium replacement system is designed to replace the liquid medium in the first autoclave body 2 after a certain period of time of the test, because the SRB bacteria can weaken and even die in the long-period test process.
Wherein, the autoclave body and the autoclave cover are made of nickel-based alloy materials. The first gas conduit 13 and the liquid conduit 32 are made of 316L stainless steel with good corrosion resistance, and the second gas conduit 24 is made of common stainless steel.
Wherein, the thermocouple is inserted into the kettle body and is close to the inner surface for heating the temperature in the kettle body. The safety valve is a spring type safety valve and is an automatic pressure relief protection device for ensuring the safe operation of the high-pressure kettle body. The pressure gauge is a corrosion-resistant 316L stainless steel pressure gauge for measuring the internal pressure of the autoclave. The thermometer is a hot-jacketed bimetallic thermometer and is used for measuring the temperature in the autoclave body.
Wherein, the stop valve and the regulating valve are used for blocking the fluid flow and regulating the valve of the flow respectively.
Wherein the moisture meter is an insertion-type corrosion-resistant moisture meter and is used for measuring the gas humidity in the second autoclave body. H2The S detector detects the gaseous H in the second autoclave body in real time2The concentration of S can reflect the behavior and characteristics of coupon corrosion and stress corrosion in the second autoclave body along with H2Change in S concentration.
The spiral connecting rod is made of a nickel-based alloy material, so that galvanic corrosion caused by inconsistency with a kettle cover material can be avoided; the first sample rack and the screws for fixing the hanging pieces are made of polytetrafluoroethylene so as to prevent galvanic corrosion; the second sample holder was made of AISI316 coated with a PFA coating to prevent corrosion in a corrosive environment.
Wherein, the sample adopts metal material used for simulating oil field production field, a set of corrosion hanging pieces (with the size of 50 multiplied by 10 multiplied by 3mm) is designed in both liquid phase and gas phase, so as to research and reflect the corrosion behavior and characteristics of the hanging pieces in different phase state environments; the sample of the stress corrosion test adopts a standard sample (with the size of 115 multiplied by 15 multiplied by 5mm) and is loaded with certain stress, and whether the sample is cracked or not is observed macroscopically after 720h of environmental test or whether cracks vertical to the stress direction exist or not is observed microscopically.
Wherein, the waste liquid collection tank, the tail gas absorption tank and the liquid storage tank body are all made of common stainless steel materials. The waste liquid collecting tank is used for collecting the liquid medium in the first high-pressure kettle replaced in the long-period test period through a discharge port at the bottom of the kettle body, and simultaneously can sample the liquid medium at different time to carry out SRB and S in the liquid medium2-、SO4 2-Isocratic test analysis to obtain SRB bacterial growth characteristic and S2-、SO4 2-And (5) the change rule of the content is equal. The tail gas absorption tank is used for absorbing N after the test is finished by alkali liquor such as NaOH contained in the tail gas absorption tank2H in gas purge test apparatus2And (4) S gas. The liquid storage tank is used for containing an experimental solution containing an SRB culture medium which is newly prepared before the medium in the first high-pressure kettle is replaced.
Wherein, the preparation of the SRB-containing culture medium experimental solution and the preparation of the composition concentration of the bacterial culture medium are as follows: 1000mL distilled water 0.5g K2HPO4·3H2O，1.0g NH4Cl，2.0g Na2SO4·7H2O，0.1g CaCl2，2.0g MgSO4·6H2O，3.5g C3H5NaO31g of yeast powder and 0.1mL of vitamin C, and the pH value is adjusted to about 7.2 by 10 percent NaOH. Introducing nitrogen to remove oxygen, sealing the bottle mouth, sterilizing under pressure at 121 deg.C for 20min, and making into liquid medium culture medium. 10mL of SRB-containing bacterial sewage of a certain oil field is added into 10mL of culture medium for enrichment culture, and 1L of oil field sewage is added as a liquid medium for experiments after constant-temperature culture is carried out for 7d in a 30 ℃ incubator.
For the coupon sample and the stress corrosion sample, before the experiment, the surface of the sample is degreased by acetone, then is polished by 600#, 800#, 1200# water sand paper step by step, and after dehydration and drying by absolute ethyl alcohol, the sample is sterilized by ultraviolet irradiation for 20min, so as to ensure the accuracy and repeatability of the experiment.
The number of SRB bacteria in the liquid phase medium can be tested, and the Chinese oil and gas industry standard (oil field injection water bacteria analysis method-absolute dilution method) can be executed. S in liquid medium2-、SO4 2-The contents can be measured by paraxylene photometry and ion chromatography, respectively.
After the experiment is finished, taking out a parallel hanging piece which needs to be subjected to bacterial adsorption and corrosion morphological feature observation on the surface of a sample, fixing bacteria, namely putting the sample into 2% glutaraldehyde solution, soaking for 4h, and dehydrating for 10min by using 25%, 50% and 100% sewage ethanol; and after cleaning the surface products of the residual parallel hanging pieces, calculating the corrosion rate and observing the surface characteristics of the base body under the film of the corrosion products by SEM.
The utility model discloses oil field SBR bacterial generation characteristic is in the implementation process of corroding the simulation experiment:
firstly, the second exhaust port 30 of the liquid storage tank body 29 of the liquid medium replacing system and the tee joint 26, the stop valve and the regulating valve on the liquid guide pipe 32 are opened, and then N is opened in sequence2 A safety valve 23 for the gas cylinder 22 and a second gas conduit 24 leading to a reservoir 29The stop valve and the regulating valve clean the air in the liquid storage tank 29, namely, remove oxygen, then close the stop valve on the liquid conduit 32, quickly pour the liquid medium 31 with the SRB culture medium prepared newly into the liquid storage tank 29, and close N2A gas cylinder and a second gas outlet and corresponding stop valve and regulating valve.
Secondly, the experimental corrosion test system, namely two sets of autoclave body devices, are assembled and connected: installing the hanging piece sample 10, the first sample rack 9 and the spiral connecting rod 8 on the kettle cover 3 on the high-pressure kettle body 2, and covering tightly; the second sample holder 18 and the forced corrosion sample 19 are assembled and loaded with certain stress and then placed in the second autoclave body 14, the hanging piece sample is also arranged on the autoclave cover and tightly covered, and the two autoclave bodies are connected by the first gas conduit 13.
Then, the discharge port 11 and the first discharge port 17 of the two vessels are closed, the two shut-off valves on the first gas conduit 13 are opened, and N is opened2Gas cylinder 22 is used to check the gas tightness of the entire corrosion test system. After the condition is determined to be good, the first exhaust port 17 is opened to ensure that the air in the two kettles is N2Displacing, namely, the kettle body is basically in an anaerobic state, namely, the anaerobic environment meeting the growth of SRB bacteria is met, the first exhaust port is closed, and then the N is closed2Gas cylinders and corresponding shut-off and regulating valves.
And thirdly, sequentially opening the stop valve and the regulating valve on the liquid conduit 32, so that the liquid medium completely submerges the hanging piece sample 10 in the first autoclave body 2 and then closing the valves. At this time, the temperature is controlled by the thermocouples 4 and N2The gas cylinder adjusts the temperature and pressure of the liquid in the first autoclave body 2 to the set experimental values. During the long-period experiment, half of the liquid medium was replaced every 5d to ensure that the SRB bacteria were in a vigorous growth phase.
And finally, after the test is finished, opening the liquid medium in the first autoclave body 2 discharged from the discharge port 11 to enter the waste liquid collecting tank 12, opening the autoclave cover after the gas in the second autoclave body 14 enters the tail gas absorption tank 21, taking out the coupon sample and the stress corrosion sample, and processing, analyzing data and representing the samples.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (7)
1. The device for simulating the growth characteristics and corrosion of the SRB bacteria in the oil field is characterized by at least comprising two sets of high-pressure reaction kettle devices, a set of air expelling system and a set of liquid medium replacing system, wherein the air expelling system and the liquid medium replacing system are respectively communicated with a first high-pressure reaction kettle device which is communicated with a second high-pressure reaction kettle device; wherein:
the air expelling system is communicated with N2Gas system, transport N2Gas displaces air in the kettle bodies of the two sets of high-pressure reaction kettle devices;
the liquid medium replacing system is communicated with an experimental solution system containing an SRB culture medium, and conveys the liquid medium with the SRB culture medium to be introduced into the kettle body of the first set of high-pressure reaction kettle device;
the high-pressure reaction kettle device is characterized in that corrosion coupon devices are arranged in kettle bodies of the high-pressure reaction kettle device, the first high-pressure reaction kettle device replaces air in the kettle body through an air expelling system to keep an anaerobic environment, and a coupon sample is subjected to corrosion rate test in a liquid phase environment; the second high-pressure reaction kettle device simultaneously carries out H generated by the kettle body of the first high-pressure reaction kettle device on the coupon sample in the kettle body2Corrosion rate test of S-aggressive gas phase environment and H2And (5) S stress corrosion testing.
2. The bacterial growth characterization and corrosion simulation apparatus of an oilfield SRB of claim 1, wherein the first autoclave apparatus comprises an autoclave body, an autoclave lid, a thermocouple, a safety valve, a pressure gauge, a thermometer, and a liquid phase environment corrosion coupon apparatus; the thermocouple is arranged in a jacket on the side wall of the kettle body, a kettle cover is covered on the top of the kettle body, a safety valve, a pressure gauge and a thermometer which extend into the kettle body are arranged on the kettle cover, a discharge port is also arranged at the bottom of the kettle body, and a waste liquid collecting tank is arranged at the bottom; the kettle body is filled with a liquid medium which is prepared with an SRB culture medium in advance.
3. The oilfield SRB bacterial growth characterization and corrosion simulation apparatus of claim 2, wherein the second autoclave apparatus comprises an autoclave body, an autoclave lid, a thermocouple, a safety valve, a pressure gauge, a thermometer, a hygrometer, H2The device comprises an S detector, a gas phase environment corrosion coupon device and a gas phase environment stress corrosion experimental device; the kettle cover is provided with an exhaust port, the bottom of the kettle body is provided with a discharge port, and the bottom of the kettle body is provided with a tail gas absorption groove.
4. The bacterial growth characteristic and corrosion simulator for SRB in oil field of claim 1, wherein said hanging pieces inside the first autoclave device and said second autoclave device each comprise a screw rod mounted on the cover, the lower end of the screw rod is connected to a sample holder, the sample holder is disc-shaped, and a plurality of hanging pieces are uniformly distributed on the side wall of the disc.
5. The bacterial growth characteristic and corrosion simulation device for the SRB in the oil field according to claim 3, wherein the stress corrosion experiment device for the gas phase environment in the second autoclave device is disposed under the corrosion coupon device for the gas phase environment, and the stress corrosion test specimen is mounted on the specimen holder by a four-point bending experiment method and loaded with the required stress.
6. The bacterial growth characteristic and corrosion simulation device for the SRB in the oil field according to claim 1, wherein the liquid medium replacement system comprises a liquid storage tank body arranged on the roller support frame, the liquid storage tank body is filled with the liquid medium, the liquid storage tank body is provided with an exhaust port, and the liquid storage tank body extends into the first autoclave device kettle body through a liquid conduit.
7. The oilfield SRB bacterial growth characteristics and corrosion simulation device of claim 1, wherein the repelling comprisesThe air system comprises N in a kettle body communicated to the first high-pressure reaction kettle device through a gas conduit2Gas cylinder, N2The gas cylinder is communicated to the liquid storage tank body through the tee joint and the other path.
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