CN112816359A - Device and method for determining solid deposition amount of crude oil in solid-phase deposition oil reservoir - Google Patents
Device and method for determining solid deposition amount of crude oil in solid-phase deposition oil reservoir Download PDFInfo
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Abstract
The invention relates to a device for determining the solid deposition amount of crude oil in a solid-phase deposition oil reservoir, which comprises an ultrahigh pressure reaction kettle, a high pressure intermediate container A, a high pressure intermediate container B, a sampler or a sample preparation device and a high pressure filter, wherein the ultrahigh pressure reaction kettle is provided with an upper end surface sealing cover and a lower end surface sealing cover; the sampler or the sample preparation device is connected with the ultrahigh pressure reaction kettle; the high-pressure intermediate container A is respectively connected with a fluid channel of the upper end surface sealing cover of the reaction kettle and the inlet end of the high-pressure filter; the inlet end of the high-pressure filter is connected with the ultrahigh-pressure reaction kettle through a fluid channel of the lower end face sealing cover, and the outlet end of the high-pressure filter is connected with the high-pressure intermediate container B. The device can realize the sample transfer of crude oil under the condition of an oil reservoir, and the solid phase deposition amount in the crude oil is measured by pressure maintaining filtration at different temperatures and pressures. The invention has accurate test result and provides important basic parameters for recognizing the solid phase deposition characteristics of the shaft and effectively removing solids.
Description
Technical Field
The invention relates to an experimental system and method for determining crude oil deposition solid phase quantity in a solid phase deposition oil reservoir in the field of oil and gas field exploration and development.
Background
The main components of the formation crude oil comprise low-carbon light hydrocarbon, paraffin, colloid and asphaltene. Under the condition of a reservoir, the asphaltene, the paraffin and the light hydrocarbon are in a phase equilibrium condition, the reservoir pressure can be reduced along with the extraction of crude oil, and simultaneously, the pressure and the temperature can be gradually reduced in the process of leading the crude oil to flow from a well bottom to a well head, so that the initial phase equilibrium condition of the crude oil can be damaged, heavy components such as the asphalt, the paraffin and the like which are originally dissolved in the crude oil can be deposited and adsorbed in a pore passage and a well bore, the pore throat of an oil layer is blocked, the flowing capacity of the crude oil is poor, the oil well is sealed and the like. This hazard is particularly acute in high temperature, high pressure, and ultra high pressure reservoirs. If an oil reservoir with reservoir temperature of 130 ℃ and reservoir pressure of 134MPa is discovered in the south of the Xinjiang oil field, a shaft has a serious solid phase deposition phenomenon under the condition of ultrahigh pressure in the development and evaluation process, and irregular well cleaning operation is required. Therefore, the crude oil solid deposition amount of the shaft in the exploration and evaluation stage is further effectively and quantitatively determined, and the method is very important for later blockage removal and cleaning.
Chinese patents 'a petroleum high pressure filter' (CN201721642818.9), 'a crude oil high pressure filter' (CN201821286792.3), 'a filtering and separating device and its using method' (CN202010199140.1), although the solid deposition in crude oil can be quantitatively determined, all are the conventional filtering methods under the condition of normal temperature and low pressure; although the idea of steam heating is proposed, the heating temperature of the vertical steam-heated crude oil high-pressure filter (CN201410742847.7) is limited, and the filtration is also measured under normal pressure.
Disclosure of Invention
The invention aims to provide a device for determining the solid deposition amount of crude oil in a solid-phase deposition reservoir, which has reliable principle and simple and convenient operation, can realize the sample transfer of the crude oil under the reservoir condition of the reservoir and can measure the solid deposition amount in the crude oil by pressure-maintaining filtration at different temperatures and pressures.
The invention also aims to provide a method for determining the solid deposition amount of crude oil in the solid-phase deposition reservoir by using the device, which has controllable test process and accurate test result and provides important basic parameters for recognizing the shaft solid deposition characteristics of the actual reservoir and effectively removing solids.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
The method for measuring the solid phase deposition amount in the high-temperature and high-pressure crude oil needs a representative crude oil sample firstly. For an oil reservoir with solid phase deposition in a shaft in exploration and evaluation stages, because the temperature and the pressure of an oil reservoir layer in the exploration and evaluation stages are basically unchanged, solid precipitation cannot occur in reservoir rock, and fluid in the shaft becomes a place where the solid phase deposition occurs due to reduction of temperature and pressure, but the specific deposited solid amount in the shaft is difficult to determine, at the moment, sampling is carried out from a well head or a separator according to a conventional method, and then crude oil solid phase deposition amount determination is carried out on formation crude oil in a matched laboratory.
In order to accurately evaluate the solid phase deposition amount of the crude oil of the oil reservoir under different temperature and pressure conditions in a laboratory, the bottom hole pressure maintaining sampling of the crude oil is preferably carried out at the evaluation stage and the initial development stage of the oil reservoir, and the crude oil is transported to the laboratory for related experiments under the condition of heat preservation and pressure maintaining. If the temperature and pressure of the oil reservoir are too high or the bottom hole pressure-holding sampling cannot be carried out due to other reasons, associated gas, degassed oil and sedimentary solids retrieved from an oil pipe retrieved from an on-site separator can be matched under reservoir conditions in a laboratory to obtain formation crude oil, and then the solid phase deposition amount under the conditions of high temperature and high pressure is measured.
The device for determining the solid deposition amount of crude oil in a solid-phase deposition oil reservoir comprises a high-pressure sample distributor, an ultrahigh-pressure reaction kettle, a high-pressure intermediate container, a heat-preservation and pressure-maintaining sampler, a high-pressure filter, a valve and a high-low temperature test box. The ultrahigh pressure reaction kettle is internally provided with a movable piston which is divided into a crude oil sample chamber and a hydraulic oil chamber, a fluid channel is arranged on one side wall surface of the cavity sample chamber, and fluid channels are also arranged on end covers at two ends of the cavity sample chamber. The contact surface of a sealing piston at one end of the sample chamber of the ultrahigh pressure reaction kettle and fluid is designed to be a concave spherical surface, so that solids deposited in crude oil can be conveniently gathered at an outlet. The high-pressure filter contains a metal filter screen, high-temperature-resistant nano filter paper is arranged on the metal filter screen, one end of the high-pressure filter is connected with an outlet of an end cover of a sample chamber of the ultrahigh-pressure reaction kettle, and the other end of the high-pressure filter is connected with a high-pressure intermediate container. A movable piston is also provided in the high-pressure intermediate reservoir. The high-low temperature test chamber provides a high-temperature environment for the whole experiment system.
Preferably, the volume of the inner cavity of the reaction kettle, which is contained between the fluid channel on one side wall surface of the sample chamber of the ultrahigh pressure reaction kettle and the end cover at the nearest end, is 20-30 mL.
Preferably, the pore diameter of the high-temperature resistant nano filter paper is not more than 100 nanometers.
The method for determining the solid deposition amount of the crude oil of the solid deposition reservoir by using the device sequentially comprises the following steps:
(1) obtaining a crude oil sample from the bottom of a well bore of an on-site oil reservoir by adopting a pressure-maintaining sampling method, and transporting the sample to a sampler; or a crude oil sample is automatically prepared in the sample preparation device;
the crude oil sample is automatically prepared in the sample preparation device, and the process is as follows: adding associated gas, degassed crude oil and deposited solids into a high-pressure sample injector according to the gas-oil ratio of on-site production, setting the pressure of the sample injector as the pressure of a target reservoir stratum and the temperature as the temperature of the target reservoir stratum, and stirring for at least 24 hours to ensure that the fluids are subjected to sufficient material exchange.
(2) The ultrahigh pressure reaction kettle is in an upright state, the sample chamber is kept on the upper part, and the pistons of the high-pressure intermediate container A, the high-pressure intermediate container B and the reaction kettle are respectively pushed to the uppermost end by a displacement pump to remove air; pushing a reaction kettle piston to a position below a fluid channel on the side surface of the sample chamber by using helium, raising the pressure of hydraulic oil in the reaction kettle to the pressure of a target oil reservoir, and recording the volume V of the helium in the sample chamber at the moment1(mL)；
(3) To a high-pressure intermediate container A, a high-pressure intermediate containerInjecting helium into the end of the container B which does not contain hydraulic oil, boosting the helium in the high-pressure intermediate container A to the pressure of a target oil reservoir, and filling high-temperature-resistant nano filter paper in a high-pressure filter, wherein the mass of the filter paper is m1(g)；
(4) Opening the high-low temperature test box, and setting the temperature as the temperature of the target oil reservoir;
(5) opening a fluid channel on the side surface of the sample chamber, slowly transferring the crude oil in the sampler or the sample matching device into the ultrahigh pressure reaction kettle, opening the fluid channel of the sealing cover on the upper end surface of the ultrahigh pressure reaction kettle, and displacing the helium gas pre-injected into the reaction kettle into the high pressure intermediate container A by the crude oil because the density of the crude oil is far greater than that of the helium gas;
(6) rotating the ultrahigh pressure reaction kettle to enable the sample chamber to face downwards, depressurizing the crude oil in the ultrahigh pressure reaction kettle to a set pressure, namely the pressure corresponding to the blocked section in the oil deposit shaft, keeping the pressure constant for at least 10 hours, and fully aggregating and depositing heavy components in the crude oil;
(7) slowly opening a valve between the outlet end of the high-pressure filter and the high-pressure intermediate container B, and allowing helium in the intermediate container B to enter the high-pressure filter, wherein the pressure of the helium in the high-pressure filter and the intermediate container B is 0.1-0.3MPa lower than the pressure of the ultrahigh-pressure reaction kettle;
(8) opening a valve between the inlet end of the high-pressure filter and a fluid channel of a sealing cover on the lower end face of the ultrahigh-pressure reaction kettle, and allowing the crude oil in the ultrahigh-pressure reaction kettle to pass through the high-pressure filter under the action of pressure difference and reach a high-pressure intermediate container B until the crude oil in the ultrahigh-pressure reaction kettle is completely discharged;
(9) opening a valve between the inlet end of the high-pressure filter and the high-pressure intermediate container A, allowing helium to flush residual crude oil in the high-pressure filter into the intermediate container B, slowly releasing pressure, taking out filter paper in the high-pressure filter, drying, and weighing m2(g)；
(10) The mass of the solid deposited in the unit crude oil under the set temperature and pressure is calculated to be
The unit is g/ml, and the steps (2) to (9) are repeated to obtain crude oil at different positions in the shaft under different set temperatures and pressuresAmount of solid phase deposition of (2).
Preferably, the pressure difference between the inlet and the outlet of the high-pressure filter is controlled to be not more than 0.3MPa in the experimental process, so that the influence of the pressure in the filtering process on the deposition amount in the crude oil is ensured to be small.
Preferably, the crude oil sample is obtained from the bottom of a well bore of an on-site oil reservoir by a pressure-maintaining sampling method.
Compared with the prior art, the invention has the following advantages:
the method can meet the requirement of measuring the solid phase deposition amount in an oil sample under different temperature and pressure conditions, the sample is not used much each time, and a plurality of tests under different conditions can be completed after one time of underground sample taking or one time of sample preparation; the crude oil sample transferring and filtering process ensures that the pressure of the oil sample is unchanged, and after the filtration is finished, the residual crude oil in the high-pressure filter is swept clean by helium under high pressure, so that the accuracy of a solid phase deposition amount test result is ensured; has wide application prospect.
Drawings
FIG. 1 is a schematic diagram of an apparatus for determining the amount of solids deposited in crude oil from a solid-phase-deposited reservoir.
In fig. 1: 1. 2, 3-displacement pump; 4-sampler or sample-dispensing; 5-high pressure intermediate vessel A; 6-high pressure intermediate vessel B; 7-ultrahigh pressure reaction kettle; 8.9, 10, 11, 12, 13-valves; 14. 15-three-way valve; 16-a sample chamber; 17-hydraulic oil; 18-crude oil sample; 19-a movable piston; 20-a high pressure filter; 21-helium gas; 22-hexagon bolt; 23-a reaction kettle piston; 24. 25-a combined sealing ring; 26. 27-sealing the upper end face and the lower end face; 28-high and low temperature test chamber; 29-high pressure chamber; 30. 31 sealing the piston; 32-a fluid channel; 33-a hydraulic oil chamber; 34-heating jacket.
Detailed Description
The invention is further illustrated below with reference to the figures and examples in order to facilitate the understanding of the invention by a person skilled in the art. It is to be understood that the invention is not limited in scope to the specific embodiments, but is intended to cover various modifications within the spirit and scope of the invention as defined and defined by the appended claims, as would be apparent to one of ordinary skill in the art.
See fig. 1.
The device for determining the amount of the solid-phase deposition crude oil deposition solids comprises an ultrahigh pressure reaction kettle 7, a high pressure intermediate container A5, a high pressure intermediate container B6, a sampler or sample distributor 4 and a high pressure filter 20, wherein the high pressure intermediate container A5, the high pressure intermediate container B6 and the ultrahigh pressure reaction kettle 7 are positioned in a high-low temperature test box 28.
The ultrahigh pressure reaction kettle 7 is provided with upper and lower end face seal covers 26 and 27, the upper and lower end face seal covers are fixed on a high pressure cavity 29 through hexagon bolts 22 to form a high pressure reaction kettle body, the kettle body is internally divided into a sample chamber 16 and a hydraulic oil chamber 33 by a reaction kettle piston 23, sealing pistons 30 and 31 are arranged between the sample chamber, the hydraulic oil chamber and the end face seal covers, combined seal rings 24 and 25 are arranged between the sealing pistons and the inner wall of the kettle body, and fluid channels 32 are arranged on the side faces of the sample chamber and the upper and lower end face seal covers.
The sampler or sample distributor 4 is internally provided with a crude oil sample 18, is externally coated with a heating sleeve 34, and is connected with the ultrahigh pressure reaction kettle 7 through a fluid channel on the side surface of the sample chamber.
And the contact surface between the sealing piston and the fluid between the sample chamber and the end face sealing cover is designed to be a concave spherical surface.
The high-pressure filter comprises a metal filter screen, wherein the metal filter screen is provided with high-temperature-resistant nano filter paper, and the aperture of the high-temperature-resistant nano filter paper is not more than 100 nanometers.
Example 1
And (3) determining the solid phase deposition amount in the crude oil depressurization process of a certain high-temperature ultrahigh-pressure oil reservoir:
(1) a heat-preservation and pressure-maintaining sampler 4 is used for obtaining a high-pressure stratum crude oil sample 18 from the bottom of an on-site oil reservoir (the reservoir temperature is 134 ℃, the reservoir pressure is 133MPa) and transporting the sample to a laboratory in a heat-preservation and pressure-maintaining way;
(2) the ultrahigh pressure reaction kettle is in an upright state, a sample chamber is kept on the upper side, a high pressure displacement pump is used for jacking the pistons 19 and 23 of the two high pressure intermediate containers A5 and the high pressure intermediate container B6 and the reaction kettle 2 and 3 to the uppermost ends for emptying, then helium is used for pushing the piston 23 of the ultrahigh pressure reaction kettle to the position below a lateral fluid channel 32, then a right end valve of a three-way valve 14 is opened, the pressure in the ultrahigh pressure reaction kettle 7 is pressurized to 133MPa (the movable piston is ensured to be below the lateral fluid channel of the cavity) through the high pressure displacement pump 2, the total volume of the high pressure helium in the ultrahigh pressure reaction kettle is recorded to be 30mL, and the right end valve of the three-way valve;
(3) injecting a certain amount of helium 21 into the high-pressure intermediate containers A5 and B6 (without hydraulic oil ends), opening a left end valve of the three-way valve 14, pressurizing the helium in the high-pressure intermediate container A5 to 133MPa by using a high-pressure displacement pump 1, and filling high-temperature-resistant nano filter paper into the high-pressure filter 20, wherein the mass of the filter paper is 0.2571 g;
(4) opening a high-low temperature test box 28 to heat the ultrahigh pressure reaction kettle 7, the high pressure filter 20 and the high pressure intermediate containers A5 and B6, setting the temperature to be 134 ℃, opening a valve 11, a left end valve and a right end valve of a three-way valve 14 and a valve 13 in the heating process, and ensuring the constant pressure in the ultrahigh pressure reaction kettle 7 and the high pressure intermediate container A, B by using high pressure displacement pumps 2 and 3;
(5) when the temperature in the high-low temperature test box 28 is stable for more than 10 hours, the right valve of the three-way valve 14 is closed, the valves 9 and 8, the right valve of the three-way valve 15 and the valve 10 are opened, the high-pressure displacement pump 1 is set to be in a constant speed 10ml/min pump inlet mode, the high-pressure displacement pump 2 is set to be in a constant speed 10ml/min pump outlet mode, because the density of the crude oil is far greater than that of the helium, the formation crude oil 18 in the heat-preservation and pressure-maintaining sampler 4 is transferred into the ultrahigh pressure reaction kettle 7, the helium 21 pre-injected in the ultrahigh pressure reaction kettle 7 is pushed back to the intermediate container 5A by the crude oil, so that the formation crude oil 18 completely replaces the helium 21 in the ultrahigh pressure reaction kettle 7, the volume of the formation crude oil 18 transferred into the ultrahigh pressure reaction kettle 7 is 30ml, and after sample transfer is completed, the valves 8, 9, 10 and 11, the left end valve of the three-way valve 14 and the right end valve of the three-way valve 15 are closed;
(6) rotating the ultrahigh pressure reaction kettle to enable a sample chamber to face downwards, reducing the pressure of the ultrahigh pressure reaction kettle 7 to 65MPa (the fluid pressure at the position of a blocked well bore on site is about 65 MPa) through a high-pressure displacement pump 2, and then keeping the pressure constant for at least 10 hours to ensure that the crude oil is recombined, fractionated and deposited;
(7) slowly opening the valve 12 to allow helium in the high-pressure intermediate container B6 to enter the high-pressure filter 20, and ensuring that the pressure in the high-pressure filter 20 and the high-pressure intermediate container B6 is 64.8MPa by using the high-pressure displacement pump 3;
(8) opening a left end valve of the three-way valve 15, and allowing the crude oil sample in the ultrahigh pressure reaction kettle 7 to pass through the high pressure filter to reach the high pressure intermediate container B under the action of pressure difference until all the formation crude oil in the ultrahigh pressure reaction kettle is transferred into the high pressure intermediate container B;
(9) opening a valve at the right end of the three-way valve 15, enabling the high-pressure helium gas to flush the residual crude oil in the high-pressure filter 20 into the intermediate container B6 through the valve 10, slowly releasing pressure, taking out the filter paper in the high-pressure filter 20, drying and weighing 0.5871 g;
(10) according to the formula
The unit is g/ml, and the solid phase deposition amount of crude oil is 0.011g/ml when the reservoir crude oil is reduced from 133MPa to 65MPa at 134 ℃;
(11) and (5) cleaning the experimental device, and repeating the steps (2) to (10) to set other experimental temperature and pressure to obtain the solid phase deposition characteristics of the target crude oil under different conditions.
The present invention is not limited to the above-described embodiments, and various modifications are possible for those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a confirm device of solid phase deposition oil reservoir crude oil deposit solid volume, includes superhigh pressure reation kettle (7), high-pressure intermediate container A (5), high-pressure intermediate container B (6), sampler or join in marriage appearance ware (4), high pressure filter (20), high-pressure intermediate container A, high-pressure intermediate container B, superhigh pressure reation kettle are arranged in high low temperature test box (28), its characterized in that, superhigh pressure reation kettle (7) have upper and lower terminal surface closing cap (26, 27), and upper and lower terminal surface closing cap passes through hexagon bolt fastening in high-pressure cavity (29) and forms the high-pressure reation kettle body, and the cauldron is internal to be separated into sample room (16) and hydraulic pressure grease chamber (33) by reation kettle piston (23), has between sample room, hydraulic pressure grease chamber and the terminal surface closing cap sealed piston (30, 31), sets up the combination sealing washer between sealed piston and the cauldron internal wall, at sample room side and last sample room, The lower end face sealing covers are provided with fluid channels (32); the sampler or sample matching device (4) is internally provided with a crude oil sample (18), is externally coated with a heating sleeve (34) and is connected with the ultrahigh pressure reaction kettle through a fluid channel on the side surface of the sample chamber; movable pistons (19) are arranged in the high-pressure intermediate container A (5) and the high-pressure intermediate container B (6), hydraulic oil (17) is filled in the lower space of each movable piston, one end of the high-pressure intermediate container A, which does not contain hydraulic oil, is respectively connected with a fluid channel sealed on the upper end surface of the ultrahigh-pressure reaction kettle and the inlet end of the high-pressure filter through a three-way valve; the inlet end of the high-pressure filter (20) is connected with the ultrahigh-pressure reaction kettle through a fluid channel of the lower end face sealing cover, the outlet end of the high-pressure reaction kettle is connected with one end of the high-pressure intermediate container B which does not contain hydraulic oil, and the high-pressure intermediate container A, the ultrahigh-pressure reaction kettle, the sampler or the sample matching device and the high-pressure intermediate container B are all connected with the displacement pump.
2. The device for determining the amount of the solid phase deposition oil deposit solids of claim 1, wherein the contact surface of the sealing piston and the fluid between the sample chamber and the end cover is designed to be a concave spherical surface.
3. The apparatus for determining the amount of the solid phase sedimentary reservoir crude oil sedimentary solids of claim 1, wherein the high pressure filter comprises a metal filter screen having a high temperature-resistant nano-filter paper thereon, wherein the pore size of the high temperature-resistant nano-filter paper is not more than 100 nm.
4. A method for determining the amount of solid phase sedimented reservoir crude oil sedimented solids using the apparatus of claim 1, 2 or 3, comprising the steps of, in order:
(1) obtaining a crude oil sample from the bottom of a well bore of an on-site oil reservoir by adopting a pressure-maintaining sampling method, and transporting the sample to a sampler; or a crude oil sample is automatically prepared in the sample preparation device;
(2) the ultrahigh pressure reaction kettle is in an upright state, the sample chamber is kept on the upper part, and the pistons of the high-pressure intermediate container A, the high-pressure intermediate container B and the reaction kettle are respectively pushed to the uppermost end by a displacement pump to remove air; and then helium is used for pushing the piston of the reaction kettle to a position below a fluid channel on the side surface of the sample chamber, the pressure of hydraulic oil in the reaction kettle is increased to the pressure of a target oil reservoir, and the volume V of the helium in the sample chamber at the moment is recorded1；
(3) Injecting helium into one end of the high-pressure intermediate container A and one end of the high-pressure intermediate container B, which do not contain hydraulic oil, boosting the helium in the high-pressure intermediate container A to the pressure of a target reservoir stratum, and filling high-temperature-resistant nano filter paper in a high-pressure filter, wherein the mass of the filter paper is m1；
(4) Opening the high-low temperature test box, and setting the temperature as the temperature of the target oil reservoir;
(5) opening a fluid channel on the side surface of the sample chamber, slowly transferring the crude oil in the sampler or the sample matching device into the ultrahigh pressure reaction kettle, opening the fluid channel of the sealing cover on the upper end surface of the ultrahigh pressure reaction kettle, and displacing the helium gas pre-injected into the reaction kettle into the high pressure intermediate container A by the crude oil because the density of the crude oil is far greater than that of the helium gas;
(6) rotating the ultrahigh pressure reaction kettle to enable the sample chamber to face downwards, reducing the pressure of crude oil in the ultrahigh pressure reaction kettle to the pressure corresponding to the blockage section of the shaft, keeping the pressure constant for at least 10 hours, and fully gathering and depositing heavy components in the crude oil;
(7) slowly opening a valve between the outlet end of the high-pressure filter and the high-pressure intermediate container B, and allowing helium in the intermediate container B to enter the high-pressure filter, wherein the pressure of the helium in the high-pressure filter and the intermediate container B is 0.1-0.3MPa lower than the pressure of the ultrahigh-pressure reaction kettle;
(8) opening a valve between the inlet end of the high-pressure filter and a fluid channel of a sealing cover on the lower end face of the ultrahigh-pressure reaction kettle, and allowing the crude oil in the ultrahigh-pressure reaction kettle to pass through the high-pressure filter under the action of pressure difference and reach a high-pressure intermediate container B;
(9) opening a valve between the inlet end of the high-pressure filter and the high-pressure intermediate container A to allow helium to flush residual crude oil in the high-pressure filter into the intermediate container B, slowly releasing pressure, taking out filter paper in the high-pressure filter, drying, and weighing m2；
(10) The mass of the solid deposited in the unit crude oil under the set temperature and pressure is calculated to be
And (5) repeating the steps (2) to (9) to obtain the solid phase deposition amount of the crude oil at different positions in the shaft under different set temperatures and pressures.
5. The method for determining the amount of solid phase sedimentary reservoir crude oil sedimentary solids of claim 4, wherein the high pressure filter inlet-outlet pressure differential is controlled to be not more than 0.3 MPa.
6. The method for determining the amount of solid phase sedimentary reservoir crude oil sedimentary solids of claim 4, wherein the crude oil sample is obtained by a dwell sampling method from the bottom of a wellbore in the field reservoir.
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| CN116908409A (en) * | 2023-07-13 | 2023-10-20 | 中国石油大学(华东) | Device and method for predicting, treating and evaluating solid-phase deposition of ultra-deep condensate gas reservoir shaft |
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