CN116297618A - Nuclear magnetic online monitoring experimental method for saturation of saturated living oil shale - Google Patents
Nuclear magnetic online monitoring experimental method for saturation of saturated living oil shale Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 19
- 238000002474 experimental method Methods 0.000 title claims abstract description 14
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- 239000011435 rock Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007864 aqueous solution Substances 0.000 claims abstract description 15
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- 238000010438 heat treatment Methods 0.000 claims abstract description 10
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- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 14
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- -1 polytetrafluoroethylene Polymers 0.000 claims description 13
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
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- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
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Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention relates to a nuclear magnetic online monitoring experiment method for saturation of saturated living oil shale, which comprises the following steps: placing the core assembly in a core holder; the nitrogen is used for pressure building, the living oil is transferred into a holder to displace the nitrogen for pressure building, and meanwhile, the living oil is used for displacing paraffin melted by heating on the surface of the rock core; continuously transferring into the living oil, gradually increasing the pressure, synchronously lifting back pressure and confining pressure according to the pressure of the inlet end of the core, and utilizing T 2 The map ensures that the internal and external pressures of the rock core reach balance after each stage of boosting, and the target pressure is 3 times of the stratum pressure so as to ensure that the rock core is completely saturated; reducing the pressure of the core to the stratum pressure, and performing nuclear magnetic scanning after stabilizing for 72 hours; displacing the active oil of the proppant pores in the core assembly with a heavy aqueous solution heated to formation temperature, when T 2 The body relaxation signals in the map disappear, namely, shale samples saturated with live oil under formation conditions are successfully established in the holder. According to the invention, shale is saturated with active oil step by step in the nuclear magnetic clamp holder, so that the original state of stratum condition shale is accurately restored.
Description
Technical Field
The invention belongs to the field of oil and gas field development engineering, and particularly relates to an experimental method for saturating living oil in shale and monitoring core fluid on line through nuclear magnetic scanning.
Background
With the focus of research in recent years toward shale oil and gas transfer, many scholars have applied nuclear magnetic resonance technology to unconventional oil and gas reservoirs. The existing shale related focus focuses on recovery of unconventional reservoir stratum conditions and research of dead/simulated oil, and related research of saturated live oil shale cores has not yet emerged. Because the compaction characteristic of shale needs gradient pressurization and saturation, the composition change problem caused by degassing of the core after dead oil pressurization and saturation does not exist under normal pressure, but the problem of degassing of the live oil caused by pressure reduction in the process of transferring the rock sample after pressurization and saturation to an online nuclear magnetic clamp holder brings great difficulty to the live oil shale experiment.
The invention discloses a shale fracturing fracture and matrix fluid saturation online monitoring method (CN 115060757A), which is characterized in that the shale is filled with ceramsite to realize accurate reduction of the fracturing fracture and the matrix in different coupling modes, and dead oil cannot accurately reduce the state of a shale reservoir. The invention patent 'a shale oil saturation evaluation model, an evaluation method and an application (CN 112378943B)' is used for further reducing the stratum state of a rock core, dead oil pressurization saturation aging is carried out on clean shale, and the difference between the components of the de-aerated crude oil and the active oil is ignored. Invention patent' shale oil CO 2 /N 2 Alternating displacement injection quantity simulation analysis method "(CN 112304842A) is used for testing displacement process of shale oil at high temperature and high pressure on line through a nuclear magnetic resonance analyzer, but the de-aerated crude oil cannot truly reflect CO 2 /N 2 In alternate displacement processPhase changes within true shale.
The shale reservoir is reduced to a certain extent by adopting a nuclear magnetic resonance spectrometer in the above documents, but the difference between the quality of the experimentally selected de-aerated crude oil and the quality of the live oil is huge, so that the oil saturation state of the shale under the stratum condition can not be reduced accurately. Shale reservoir is very compact, permeability is extremely low, and can only be saturated through gradient pressurization, and the saturation can not be displaced, and the degassing problem that the pressure is reduced in the process of transferring a saturated live oil rock sample from a saturation device to an online nuclear magnetic clamp holder can cause the change of a live oil component. Therefore, the research and development of an experimental method for directly carrying out progressive saturation of the living oil shale in the online nuclear magnetic clamp holder without core transportation and maximizing the reduction of the shale reservoir state is very important for shale oil research.
Disclosure of Invention
The invention aims to provide a method for saturating living oil in shale and monitoring the core fluid saturation on line through nuclear magnetic scanning, which has reliable principle and simple and convenient operation, realizes accurate reduction of the original state of shale under stratum conditions by gradually saturating the living oil in a nuclear magnetic clamp holder, and has important guiding significance for deeply researching the real shale mechanism related to the fluid and promoting the experimental progress of the shale oil.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
The nuclear magnetic online monitoring experimental method for the saturation of the saturated living oil shale sequentially comprises the following steps:
(1) Preparing a heavy water solution with real stratum mineralization degree by using heavy water and NaCl, and placing the heavy water solution in an intermediate container; preparing living oil according to PVT report of target reservoir, and placing in sample preparation device;
(2) Placing the cleaned and dried shale core into a heavy water solution, soaking for 24 hours in a self-priming way, and then placing the shale core into a centrifuge to establish the water saturation of the core;
(3) Placing the core into paraffin in a molten state, and forming a film on the surface of the core to wrap the core;
(4) Vertically placing a polytetrafluoroethylene tube, installing a filter at the lower end, filling a hydrophilic propping agent with the thickness of h into the tube, vertically centering a rock core into the polytetrafluoroethylene tube, filling an annular space between the polytetrafluoroethylene tube and the rock core with the propping agent, continuously adding the propping agent until a propping agent layer with the thickness of h is formed between the upper end surface of the rock core and the upper end of the polytetrafluoroethylene tube, tightly attaching the propping agent layer, installing a filter again, forming a rock core combination, and then placing the rock core in a holder;
(5) The clamp holder is horizontally arranged in the nuclear magnetic resonance apparatus, the on-line monitoring system comprises the nuclear magnetic resonance apparatus, a high-temperature circulating device, a heavy aqueous solution intermediate container, a sample preparation device, a displacement pump, a confining pressure pump, a pressure return pump and a separator, wherein the inlet end of the clamp holder is connected with the displacement pump through the heavy aqueous solution intermediate container and the sample preparation device respectively, the outlet end of the clamp holder is connected with a back pressure valve, the back pressure valve is connected with the pressure return pump and the separator respectively, the clamp holder is connected with the high-temperature circulating device and the confining pressure pump, and the heavy aqueous solution intermediate container and the sample preparation device are arranged in the oven;
(6) Establishing pressure in the clamp holder by using nitrogen, wherein the target pressure is higher than the saturation pressure of the active oil, controlling the internal pressure by using a back pressure valve, synchronously establishing the internal pressure of the confining pressure, and keeping the confining pressure higher than the internal pressure by 2MPa; transferring the live oil in the sample preparation device into a rock core holder, displacing nitrogen for pressure building, synchronously starting a high-temperature circulating device to recover the rock core to the stratum temperature, keeping the pressure of a back pressure valve unchanged in the process of injecting the live oil, and displacing paraffin melted by heating the surface of the rock core by using the live oil because the melting point of the paraffin is lower than the stratum temperature;
(7) Continuously transferring into the living oil, gradually increasing the pressure, synchronously lifting back pressure and confining pressure according to the pressure of the inlet end of the core, and utilizing T 2 The map ensures that the internal and external pressures of the rock core reach balance after the pressure of each stage is boosted, the numerical value of an inlet and outlet pressure gauge is unchanged after the pump is stopped, and the target pressure is 3 times of the formation pressure or the upper limit of the pressure of the holder so as to ensure that the rock core is completely saturated;
(8) Reducing the pressure of the core to the formation pressure, stabilizing for 72 hours, and then performing nuclear magnetic scanning to obtain T of all fluids in the holder under the formation condition 2 A map;
(9) Displacing live oil of proppant pores in a core assembly with a heavy aqueous solution heated to formation temperature, scanning T 2 Map, when T 2 The disappearance of the relaxation signal in the map, i.e. successful formation build-up in the holderShale samples saturated with live oil under conditions;
(10) Various experimental studies (CO) were performed on shale samples of saturated live oil under formation conditions 2 Gas drive, pressure failure, imbibition experiments, etc.), and on-line nuclear magnetic monitoring is performed on the saturation of the fluid in the core during the experiment.
Further, in the step (2), if the actual reservoir does not contain formation water, the step is skipped.
Further, in the step (4), the filter is a ceramic plate with the diameter consistent with the inner diameter of the polytetrafluoroethylene tube, and the mesh size of the ceramic plate is smaller than the diameter of the propping agent.
Further, in the step (3), the core may be placed in a low-melting polymer, where the low-melting polymer is selected from polycaprolactone (PCL, melting point 60 ℃), modified polycaprolactone (dicumyl peroxide (DCP) or di-tert-butylperoxyisopropyl benzene (BIB) modified, melting point 42 ℃), or l-polylactic acid (PLLA).
Further, in the step (6), if the low melting point polymer is selected in the step (3), since the viscosity of the polymer decreases with the temperature rise, the active oil in the sample preparation device needs to be raised to the upper limit temperature of the nuclear magnetic online holder, the target pressure for pressure establishment is higher than the active oil bubble point pressure corresponding to the temperature, the active oil in the sample preparation device is transferred into the holder, the high temperature circulation device which is synchronously opened is raised to the active oil temperature, the heated and melted polymer on the surface of the core is ensured to be removed (the polymer amount received by the outlet of the holder is monitored) by displacing the high temperature active oil, and then the core is restored to the stratum temperature and pressure.
Compared with the prior art, the invention has the following beneficial effects:
(1) Gradient pressurization of high-pressure active oil ensures good saturation of each pore of shale;
(2) The invention uses low-melting-point paraffin wax/Polycaprolactone (PCL)/L-polylactic acid (PLLA) and other substances with certain shear strength at low temperature and low viscosity at high temperature to form a thin layer for protecting shale, prevents pores from being filled with nitrogen for pressure building, and realizes the saturation of living oil of shale;
(3) The pressurizing and saturating process in the holder designed by the invention avoids the problem of core transportation after the external container is pressurized and saturated.
Drawings
Fig. 1 is a schematic structural diagram of an online monitoring system for saturated and alive oil shale.
Fig. 2 is a schematic diagram of a shale core assembly structure in a nuclear magnetic clamp.
In the figure: 1-nuclear magnetic resonance apparatus; 2-a high temperature circulation device; 3-a heavy aqueous intermediate container; 4-live oil sample preparation device; 5-baking oven; 6-a three-way valve; 7-a pipeline heating ring; 8. 9-a pressure gauge; 10-back pressure valve; 11-separator; 12. 13-displacement pump, back pressure pump; 14-a fluoridized liquid surrounding pressure pump; 15-nuclear magnetic clamper; 16-a filter; 17-wax sealing layer; 18-polytetrafluoroethylene tube; 19-glass beads; 20-shale core.
FIG. 3 is shale T during on-line monitoring 2 And (5) a map.
Detailed Description
The present invention is further described below with reference to the accompanying drawings and examples in order that the present invention may be further described below with reference to the drawings and examples in order that those skilled in the art may understand the present invention. It should be understood that the invention is not limited to the precise embodiments, and that various changes may be effected therein by one of ordinary skill in the art without departing from the spirit or scope of the invention as defined and determined by the appended claims.
Examples
In the example, the original stratum pressure is 29MPa, the stratum temperature is 67 ℃, the saturation pressure is 8MPa, the volume coefficient of the living oil under stratum conditions is 1.4, and the shale core porosity is 7%.
See fig. 1 and 2.
The on-line monitoring system comprises a nuclear magnetic resonance instrument 1, a high-temperature circulating device 2, a heavy aqueous solution intermediate container 3, a sample preparation device 4, an oven 5, a three-way valve 6, a heating ring 7, pressure gauges (8 and 9), a back pressure valve 10, a separator 11, a displacement pump 12, a back pressure pump 13 and a fluorinated liquid confining pressure pump 14. The nuclear magnetic resonance apparatus 1 is provided with a nuclear magnetic clamp 15, and a core combination is arranged in the clamp, wherein the core combination comprises a filter 16, a wax sealing layer 17, a polytetrafluoroethylene tube 18, glass beads 19 and a shale core 20.
The inlet end of the clamp 15 is connected with a displacement pump 12 through a three-way valve 6, a heavy aqueous solution intermediate container 3 and a sample preparation device 4, the outlet end of the clamp is connected with a back pressure valve 10, the back pressure valve is respectively connected with a back pressure pump 13 and a separator 11, the heavy aqueous solution intermediate container and the sample preparation device are arranged in the oven 5, the clamp with a high-temperature circulating device 2 is connected with a confining pressure pump 14, and pressure gauges 8 and 9 are arranged at the two ends of the clamp; the line connecting the inlet end of the holder and the intermediate container is wound around a line heating ring 7.
The method for monitoring the fluid volume change of the saturated living oil shale on line by utilizing the nuclear magnetic resonance technology comprises the following steps in sequence:
(1) Firstly preparing a heavy water solution with the mineralization degree of 46500ppm by using heavy water and NaCl, and filling the heavy water solution into an intermediate container; the reservoir live oil is compounded according to PVT reports and placed in a sample preparation device;
(2) Placing the cleaned and dried 1 inch standard shale core (with the length of 50mm and the diameter of 25 mm) into a heavy water solution, and self-priming and soaking for 24 hours; putting the mixture into a 12000rad/min high-speed centrifuge for centrifugation for 30 minutes, and establishing the saturation of the shale-bound water;
(3) Putting the centrifuged shale into melted No. 58 fully refined paraffin, and forming a 1mm thick film wrapping core on the surface of the sample;
(4) Taking a 1.5-inch special polytetrafluoroethylene tube, vertically placing, installing a 20-mesh ceramic filter at the lower end, and adding 10-mesh hydrophilic glass beads with the thickness of about 5mm; vertically centering the wax sealed core in a polytetrafluoroethylene tube, continuously adding 10-mesh glass beads to fill the annular part, and tightly attaching a 20-mesh ceramic filter until the thickness of the upper end surface reaches 5mm, as shown in fig. 2;
(5) Heating a heating ring wound by a pipeline connecting the inlet end of the core holder and the intermediate container to the stratum temperature of 67 ℃; placing the heavy aqueous solution intermediate container and the sample preparation device in a 67 ℃ constant temperature oven;
(6) The core assembly is put into a nuclear magnetic clamp holder, the pressure in the clamp holder is increased to 10MPa by nitrogen, the back pressure is synchronously increased to 10MPa, and the confining pressure is increased to 12MPa. Scanning wax seal core T 2 The spectrum is shown in FIG. 3 (a), and the signal quantity is unsaturatedThe reference signal of the oil core is used for measuring the saturated quantity of crude oil;
(7) Transferring the live oil in the sample preparation device into a core holder at a constant pressure of 11MPa, synchronously starting a high-temperature circulating device to recover the core to 67 ℃, keeping the pressure of a back pressure valve at 10MPa in the process of injecting the live oil, taking out paraffin melted by heating on the surface of the core by using the live oil, and continuously scanning T in the displacement process 2 Spectrum, T 2 The stable spectrum phase signals indicate that the paraffin on the surface layer of the core is driven out;
(8) Continuously transferring into living oil, pressurizing to 40MPa step by step, stabilizing for 3 hr every 5MPa rise, synchronously increasing confining pressure and back pressure, and scanning T after pressure is stabilized 2 The pattern is shown in FIG. 3 (b). As can be seen from fig. 3 (b), progressive pressurization saturates the live oil into shale core size pores and glass bead pores;
(9) Closing the three-way valve, reducing the pressure of the clamp holder to 29MPa of stratum pressure, stabilizing for 72 hours, and scanning T 2 Map, see FIG. 3 (c), pressure drop causes the expansion of live oil to overflow core and glass bead pores, T 2 The area of the spectrum peak is reduced;
(10) Closing the valve of the sample preparation device, opening the valve of the heavy aqueous solution intermediate container, injecting the heavy aqueous solution heated to the stratum temperature at the speed of 1ml/min, keeping the back pressure at 29MPa, and continuously scanning T in the displacement process 2 Map, when T 2 If the bulk relaxation signals in the map are partially disappeared, a shale sample saturated with live oil under the formation condition is successfully built in the nuclear magnetic clamp, as shown in fig. 3 (d). The disappearance of the bulk relaxation indicates that the living oil in the pores of the hydrophilic glass beads has been totally driven off by the heavy water.
CO is carried out 2 The displacement experiment is carried out as follows: changing heavy water solution in intermediate container into CO 2 Gas to develop CO for saturated living oil shale 2 Displacement experiments. The core fluid saturation degree in the displacement process can be monitored on line in the experimental process. When T is 2 After no change in the spectrum, the experiment was ended, see FIG. 3 (e), T 2 The duty ratio of the reduced area of the spectrum peak is the CO 2 Recovery of displacement.
According to T 2 The change of the spectrum signal intensity can calculate the CO 2 The recovery ratio of the flooding is 59.13%. This timeExperiment the volume of the oil phase was collected in the separator at 0.705ml, and the CO was calculated from the volume of the oil phase 2 The recovery ratio of the flooding is 57.48 percent.
Claims (5)
1. The nuclear magnetic online monitoring experimental method for the saturation of the saturated living oil shale sequentially comprises the following steps:
(1) Preparing a heavy water solution with real stratum mineralization degree by using heavy water and NaCl, and placing the heavy water solution in an intermediate container; preparing living oil according to PVT report of target reservoir, and placing in sample preparation device;
(2) Placing the cleaned and dried shale core into a heavy water solution, soaking for 24 hours in a self-priming way, and then placing the shale core into a centrifuge to establish the water saturation of the core;
(3) Placing the core into paraffin in a molten state, and forming a film on the surface of the core to wrap the core;
(4) Vertically placing a polytetrafluoroethylene tube, installing a filter at the lower end, filling a hydrophilic propping agent with the thickness of h into the tube, vertically centering a rock core into the polytetrafluoroethylene tube, filling an annular space between the polytetrafluoroethylene tube and the rock core with the propping agent, continuously adding the propping agent until a propping agent layer with the thickness of h is formed between the upper end surface of the rock core and the upper end of the polytetrafluoroethylene tube, tightly attaching the propping agent layer, installing a filter again, forming a rock core combination, and then placing the rock core in a holder;
(5) The clamp holder is horizontally arranged in the nuclear magnetic resonance apparatus, the on-line monitoring system comprises the nuclear magnetic resonance apparatus, a high-temperature circulating device, a heavy aqueous solution intermediate container, a sample preparation device, a displacement pump, a confining pressure pump, a pressure return pump and a separator, wherein the inlet end of the clamp holder is connected with the displacement pump through the heavy aqueous solution intermediate container and the sample preparation device respectively, the outlet end of the clamp holder is connected with a back pressure valve, the back pressure valve is connected with the pressure return pump and the separator respectively, the clamp holder is connected with the high-temperature circulating device and the confining pressure pump, and the heavy aqueous solution intermediate container and the sample preparation device are arranged in the oven;
(6) Establishing pressure in the clamp holder by using nitrogen, wherein the target pressure is higher than the saturation pressure of the active oil, controlling the internal pressure by using a back pressure valve, synchronously establishing the internal pressure of the confining pressure, and keeping the confining pressure higher than the internal pressure by 2MPa; transferring the live oil in the sample preparation device into a core holder, displacing nitrogen for pressure building, synchronously starting a high-temperature circulating device to recover the core to the stratum temperature, keeping the pressure of a back pressure valve unchanged in the process of injecting the live oil, and displacing paraffin melted by heating the surface of the core by using the live oil;
(7) Continuously transferring into the living oil, gradually increasing the pressure, synchronously lifting back pressure and confining pressure according to the pressure of the inlet end of the core, and utilizing T 2 The map ensures that the internal and external pressures of the rock core reach balance after each stage of boosting, and the target pressure is 3 times of the formation pressure or the upper limit of the pressure of the holder so as to ensure that the rock core is completely saturated;
(8) Reducing the pressure of the core to the formation pressure, stabilizing for 72 hours, and then performing nuclear magnetic scanning to obtain T of all fluids in the holder under the formation condition 2 A map;
(9) Displacing the active oil of the proppant pores in the core assembly with a heavy aqueous solution heated to formation temperature, when T 2 The relaxation signals of the body in the map disappear, namely, a shale sample saturated with living oil under the formation condition is successfully established in the clamp holder;
(10) Various experiments are carried out on shale samples of saturated living oil under stratum conditions, and on-line nuclear magnetism monitoring is carried out on the saturation of fluid in the rock core in the experimental process.
2. The method of claim 1, wherein in step (2), if the actual reservoir does not contain formation water, the step is skipped.
3. The method for on-line monitoring and testing of saturation nuclear magnetism of saturated and alive oil shale according to claim 1, wherein in the step (4), the filter is a ceramic plate with the diameter consistent with the inner diameter of a polytetrafluoroethylene tube, and the mesh size of the ceramic plate is smaller than the diameter of a propping agent.
4. The method for on-line monitoring and testing of saturation nuclear magnetism of saturated and alive oil shale according to claim 1, wherein in the step (3), the core can be placed in a low-melting-point polymer, and the low-melting-point polymer is selected from polycaprolactone, modified polycaprolactone or L-polylactic acid.
5. The method for online monitoring and testing the saturation nuclear magnetism of the saturated and alive oil shale according to claim 1, wherein in the step (6), if the step (3) is to select a low-melting-point polymer, the alive oil in the sample preparation device is raised to the upper limit temperature of the clamp holder, the target pressure for pressure establishment is higher than the pressure of the alive oil bubble point corresponding to the temperature, the alive oil in the sample preparation device is transferred into the clamp holder, the high-temperature circulation device which is synchronously opened is raised to the temperature of the alive oil, the polymer melted by heating the surface of the core is ensured to be removed by displacing the high-temperature alive oil, and then the core is restored to the temperature and the pressure of the stratum.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100271019A1 (en) * | 2009-04-22 | 2010-10-28 | Vivek Anand | Predicting properties of live oils from nmr measurements |
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| US20200363356A1 (en) * | 2019-05-13 | 2020-11-19 | Exxonmobil Upstream Research Company | Advanced NMR of Mobile and Immobile Fluids in Core Samples including Diffusional Fluid Exchange Methods |
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| CN115060757A (en) * | 2022-06-28 | 2022-09-16 | 西南石油大学 | Shale fracturing fracture and in-matrix fluid saturation online monitoring method |
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2023
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| US20100271019A1 (en) * | 2009-04-22 | 2010-10-28 | Vivek Anand | Predicting properties of live oils from nmr measurements |
| CN109357921A (en) * | 2018-10-10 | 2019-02-19 | 成都理工大学 | A kind of fracture hole oil reservoir Artificial Core Making method that parameter is controllable |
| CN109612906A (en) * | 2018-12-24 | 2019-04-12 | 西安石油大学 | A kind of method of best water drive velocity during compact oil reservoir dynamic water drive |
| US20200363356A1 (en) * | 2019-05-13 | 2020-11-19 | Exxonmobil Upstream Research Company | Advanced NMR of Mobile and Immobile Fluids in Core Samples including Diffusional Fluid Exchange Methods |
| US20210262955A1 (en) * | 2020-02-26 | 2021-08-26 | Saudi Arabian Oil Company | Systems and Methods for Slice Selective Nuclear Magnetic Resonance Testing of Fractured Core Plugs to Determine In-Situ Pore Volume |
| CN115060757A (en) * | 2022-06-28 | 2022-09-16 | 西南石油大学 | Shale fracturing fracture and in-matrix fluid saturation online monitoring method |
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