CN102435716B - Diagenesis simulation experiment device - Google Patents
Diagenesis simulation experiment device Download PDFInfo
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- CN102435716B CN102435716B CN201110271800.3A CN201110271800A CN102435716B CN 102435716 B CN102435716 B CN 102435716B CN 201110271800 A CN201110271800 A CN 201110271800A CN 102435716 B CN102435716 B CN 102435716B
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Abstract
The embodiment of the invention provides a diagenesis simulation experiment device which comprises a control device, a reaction solution supply device, a multi-stage continuous flow reaction device, a solution component in-situ analysis device and a rock core permeability evolution on-line detection device, wherein the reaction solution supply device is connected with the control device; the control device is respectively connected with the reaction solution supply device, the multi-stage continuous flow reaction device and the core permeability evolution online detection device; the reaction solution supply device is respectively connected with the multi-stage continuous flow reaction device and the core permeability evolution online detection device; the multi-stage continuous flow reaction device is connected with the solution component in-situ analysis device; the core permeability evolution online detection device is respectively connected with the multi-stage continuous flow reaction device and the reaction solution supply device. The diagenesis simulation experiment device provided by the invention can complete more than two stages of water-rock reaction processes under different temperature and pressure conditions and under the condition of keeping fluid to continuously flow, and realizes continuous multi-stage water-rock reaction experiment simulation.
Description
Technical field
The present invention relates to the experimental provision in oil geology field, particularly relate to a kind of Diagenesis simulation experimental apparatus, be a kind ofly to possess that fluid original position is analyzed and the online Diagenesis simulation experimental apparatus detecting of permeability concretely, be mainly used in simulating because basin lifting causes temperature, pressure, fluid properties and change the Diagn such as the corrosion that causes, cementing, explanation.
Background technology
As everyone knows, the resources such as oil and gas reduce just increasingly, and adopting and more effectively exploiting these resources with more economic mode is also trend of the times.By the Diagn research to rock stratum, contribute to judge whether Study of Strata possesses the condition of storage oil gas, thereby improve the efficiency of oil-gas exploration.
Diagn refers to that sediment is to the various physics, chemistry and the biological chemistry action that occur in rock conversion process, mainly occurs in after deposition before metamorphism during this period of time.Diagn has vital role in oil and gas reservoir research.By to diagenetic research, can understand the transformation degree of Diagn to reservoir, evaluate and predicting reservoir from diagenesis angle.Diagn is the process that built-in system and external environment interact, mutually coordinate, and different basin types can have different diagenesis evolution, same basin, and different parts diagenesis evolution also may be different.
The water rock reaction experiment of at present, simulating different buring environments is one of important means of Diagn research.The reaction of water rock refers in geologic process, and the chemical reaction that material composition exchanges mutually occurs between aqueous solution and Minerals And Rocks.Bury at sediment, in the process of heating and compacting, the fluid in sediment can be discharged from.Along with the migration of fluid, it can react with other rock or mineral, forms the fluid with certain chemical attribute.Be accompanied by the lifting in basin, the temperature of rock stratum, pressure, fluid properties also change thereupon, thereby the Diagn such as corrosion, cementing, explanation occur.Existing analogue experiment installation can only provide the water rock reaction simulation in single stage, plant automation degree is low, simplicity of design, is difficult to simulate well structural evolution, sedimentation and the Diagn such as corrosion that geologic function causes temperature in actual formation, pressure, fluid properties to change to cause, cementing, explanation such as buries.
Summary of the invention
The invention provides a kind of Diagenesis simulation experimental apparatus, comprise control device, reaction solution feeding mechanism, multistage continuous stream reaction unit, solution compolision original position analytical equipment and core permeability evolution on-line measuring device; Wherein, described control device is connected to described reaction solution feeding mechanism, described multistage continuous stream reaction unit and described core permeability evolution on-line measuring device; Described reaction solution feeding mechanism is connected to described multistage continuous stream reaction unit and described core permeability evolution on-line measuring device; Described multistage continuous stream reaction unit is connected in described solution compolision original position analytical equipment; Described core permeability evolution on-line measuring device is connected to described multistage continuous stream reaction unit and described reaction solution feeding mechanism; Described in described control device control, reaction solution feeding mechanism is under the pressure of setting and flow velocity, from outside abstraction reaction solution and reacting gas, and described reaction solution and reacting gas are sent to described multistage continuous stream reaction unit or described core permeability evolution on-line measuring device; Described multistage continuous stream reaction unit comprises at least two reactors, places rock to be measured in described reactor, and described rock to be measured reacts with described reaction solution, and reaction of formation generates liquid; Described reaction solution flow into described solution compolision original position analytical equipment, analyzes composition and the content of described reaction solution under high-temperature and high-pressure conditions; Described core permeability evolution on-line measuring device is used for placing rock core to be measured, and reacts with described reaction solution or described reaction solution, in real time, detect online the permeability of described rock core to be measured.
In the present embodiment, described Diagenesis simulation experimental apparatus also comprises at least two solution on-line samplers, correspondence is connected at least two reactors in described multistage continuous stream reaction unit, for the reaction solution of at least two reactors described in obtaining online under High Temperature High Pressure.
In the present embodiment, the described multistage connects stream reaction unit and also comprises at least two hygrosensors, at least two reactors described in correspondence is connected in, and connect described control device, for detection of the temperature of the reaction solution in corresponding reactor, and feed back to described control device demonstration.
In the present embodiment, described Diagenesis simulation experimental apparatus also comprises at least two overvoltage protectors, the exit of at least two reactors described in being arranged on, and for when analogue experiment installation actual pressure is higher than setting when safety value, system releasing pressure automatically.
Diagenesis simulation experimental apparatus provided by the invention, can simulate different stratum buring environments, complete in different temperature and pressure conditions and keep more than two stage water rock course of reaction in fluid continuous flow situation, realize continuous multistage water rock reaction experiment simulation, this will contribute to make in the experimental phase fluid chemistry character closer to natural actual conditions.In the experimentation of multistage continuous flow, by copying temperature, pressure, fluid chemistry character, mineral composition and the flow performance of different phase in diagenesis mechanism, can effectively simulate due to Diagn such as corrosion that basin lifting causes temperature in actual formation, pressure, fluid properties to change to cause, cementing, explanations.
Diagenesis simulation experimental apparatus provided by the invention not only can be simulated open flow system but also can simulate the water rock reaction under static closed system, especially can simulate more truly by the experiment of multistage continuous stream the Diagn that actual formation occurs; Again in conjunction with High Temperature High Pressure solution compolision original position analytical technology and the online sampling technique of High Temperature High Pressure solution, can analyze the fluid properties of each elementary reaction generation liquid, so just realize the experimental simulation to Petrogenetic Model, contributed to provide Petrogenetic Model more accurately; Utilize core permeability evolution on-line measuring device, can effectively simulate cover press and hot conditions under water rock between true core and fluid react, and can detect in real time, online the permeability value of rock core, realize the transformation efficiency of quantitative description fluid to rock core internal void.
Connected mode between multiple reactors of Diagenesis simulation experimental apparatus provided by the invention and between reactor and core holding unit has adopted the serial/parallel design that is connected, under series connection, Diagenesis simulation experimental apparatus can provide multistage continuous flow experimental situation, carries out multistage water rock reaction experiment simulation; Under state in parallel, reactor or core holding unit independent operating separately, provides single stage water rock reaction experiment simulation, thereby increases work efficiency.And reactor, valve, pipeline all adopt inconel625 alloy material to make, this just guarantees that whole device can high temperature resistant, high pressure resistant and strong alkali-acid resistance corrosion.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the Diagenesis simulation experimental apparatus of the embodiment of the present invention;
Fig. 2 is the structural representation of the reaction solution feeding mechanism of the embodiment of the present invention;
Fig. 3 is the structural representation of another embodiment of Diagenesis simulation experimental apparatus of the present invention;
Fig. 4 is the structural representation of another embodiment of Diagenesis simulation experimental apparatus of the present invention;
Fig. 5 is the structural representation of the solution composition original position analytical equipment of the embodiment of the present invention;
Fig. 6 is the structural representation of the core permeability evolution on-line measuring device of the embodiment of the present invention;
Fig. 7 is the structural representation of the multistage continuous stream reaction unit that comprises multiple first heaters;
Fig. 8 is the structural representation of the multistage continuous stream reaction unit that comprises a first heater;
Fig. 9 is the structural representation of the core permeability evolution on-line measuring device that comprises secondary heating mechanism;
Figure 10 is the structural representation of the control device of the embodiment of the present invention;
Figure 11 is the syndeton schematic diagram with N reactor and N-1 thermode in the N stage water rock reaction experiment analogue means of the embodiment of the present invention;
Figure 12 is the structural representation of a specific embodiment of the Diagenesis simulation experimental apparatus of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the structural representation of the Diagenesis simulation experimental apparatus of the embodiment of the present invention.As shown in the figure, the described Diagenesis simulation experimental apparatus in the present embodiment comprises control device 1, reaction solution feeding mechanism 2, multistage continuous stream reaction unit 3, solution compolision original position analytical equipment 4 and core permeability evolution on-line measuring device 5; Wherein, described control device 1 is connected to described reaction solution draw-out device 2, described multistage continuous stream reaction unit 3 and described core permeability evolution on-line measuring device 5; Described reaction solution feeding mechanism 2 is connected to described multistage continuous stream reaction unit 3 and described core permeability evolution on-line measuring device 5; Described multistage continuous stream reaction unit 3 is connected in described solution compolision original position analytical equipment 4; Described core permeability evolution on-line measuring device 5 is connected to described multistage continuous stream reaction unit 3 and described reaction solution feeding mechanism 2.
Described control device 1 is controlled described reaction solution feeding mechanism 2 under the pressure of setting and flow velocity, from outside abstraction reaction solution and reacting gas, and described reaction solution and reacting gas are sent in described multistage continuous stream reaction unit 3 or described core permeability evolution on-line measuring device 5.
Described multistage continuous stream reaction unit 3 comprises at least two reactors, places rock to be measured in described reactor, and described rock to be measured reacts with described reaction solution, and reaction of formation generates liquid.
Described reaction solution flow into described solution compolision original position analytical equipment 4, analyzes composition and the content of described reaction solution under high-temperature and high-pressure conditions, and Petrogenetic Model more is accurately provided.
Described core permeability evolution on-line measuring device 5 is for placing rock core to be measured, and react with described reaction solution or described reaction solution, for detecting in real time, online the permeability of described rock core to be measured, realize the transformation efficiency of quantitative description fluid to rock core internal void.
In the present embodiment, as shown in Figure 2, reaction solution feeding mechanism 2 comprises: liquid phase pump 201, and for setting the required flow velocity of experiment, and from outside abstraction reaction solution, and provide experiment required pressure by compression solution; Wherein, reaction solution can be fresh water or oil field water, can be also the solution of human configuration.Gas phase pump 202, under pressure and flow velocity described, extracts external reaction gas, as carbon dioxide or sulfuretted hydrogen etc.; Primary heater 203, heats for described reaction solution and described reacting gas are mixed to the reaction solution generating.Wherein, described gas phase pump 202 is high pressure vapor pump, and liquid phase pump 201 is highly pressurised liquid ram pump, in liquid phase pump 201, dispose pressure transducer and flow sensor, be connected in control device 1, the flow velocity of reaction solution can be set, and provide experiment required pressure according to compression solution.
In the present embodiment, as shown in Figure 3, described Diagenesis simulation experimental apparatus also comprises at least two solution on-line samplers 601,602, correspondence is connected at least two reactors 301,302 in described multistage continuous stream reaction unit 3, for the reaction solution of at least two reactors 301,302 described in obtaining online under High Temperature High Pressure.Wherein, the described multistage connects stream reaction unit and also comprises at least two hygrosensors (not showing in Fig. 3), at least two reactors 301,302 described in correspondence is connected in, and connect described control device 1, for detection of the temperature of the reaction solution in corresponding reactor, and feed back to described control device 1 and show.Wherein, the reactor in the present embodiment is at least two, and according to experiment needs, it is more that reactor can be set, so that more multistage Diagn simulated experiment to be provided.And, between the multiple reactors in Diagn simulation test, adopt serial/parallel connection design, under series connection, Diagn simulated experiment can provide multistage continuous flow experimental situation, carries out multistage water rock reaction experiment simulation; Under state in parallel, each reactor independent operating separately, provides single stage water rock reaction simulation experiment.
In the present embodiment; as shown in Figure 4, described Diagenesis simulation experimental apparatus also comprises at least two overvoltage protectors 701,702, the exit of at least two reactors 301,302 described in being arranged on; for when analogue experiment installation actual pressure is higher than setting when safety value, system releasing pressure automatically.
In the present embodiment, as shown in Figure 5, described solution compolision original position analytical equipment 4 comprises at least two in-situ observation ponds 401,402, fibre-optical probe 403 and spectroanalysis instrument 404; Described at least two in-situ observation ponds 401,402 are connected with described spectroanalysis instrument 404 by described fibre-optical probe 403, composition and the content of the reaction solution generating at least two reactors described in analyzing under high-temperature high-pressure in-situ condition.Wherein, in-situ observation pond 401,402 is also corresponding setting one by one with reactor 301,302, for observing composition and the content of the reaction solution that each reactor generates.In the present embodiment, in-situ observation pond can be sapphire form pond.Spectroanalysis instrument 404 comprises UV, visible light photothermal spectroscopic analyzer, laser Raman spectrometer or infrared visible spectrophotometer.
In the present embodiment, as shown in Figure 6, core permeability evolution on-line measuring device 5 comprises: core holding unit 501, for clamping rock core to be measured; Manual pump 502, is used to described core holding unit 501 that default confined pressure is provided; Pressure detector 503, connects control device 1, for measuring the pressure reduction at described core holding unit 501 two ends, and gives described control device 1 by described Pressure difference feedback, and real-time online detects the permeability of described rock core to be measured.Wherein, between reactor in core holding unit 501 and multistage continuous stream reaction unit 3, be also to have adopted serial/parallel design repeatedly, under series connection, can carry out multistage water rock reaction experiment simulation, under state in parallel, reactor and core holding unit independent operating separately, provides single stage water rock reaction experiment simulation.
In the present embodiment, described core holding unit 501 comprises clamper housing and the tank that boosts, described in the tank that boosts surround the setting of described clamper housing; The tank that boosts described in described manual pump 502 connects, by the solution boosting between tank and described clamper housing described in described manual pump 502 compressions, provides the confined pressure of described clamper housing; Described pressure detector 503 is connected to the two ends of described clamper housing, while being used for measuring fluid through rock core to be measured, the pressure differential that core holding unit 501 two ends produce, thus the permeability of rock core to be measured can be calculated, to realize the transformation efficiency of quantitative description fluid to rock core internal void.
In the present embodiment, as shown in Figure 7, the described multistage connects stream reaction unit 3 and also comprises first heater 303, and described in being used to, at least two reactors 301,302 heat, and set the temperature of the reaction solution in described reactor.Described first heater 303 can be additional hot jacket, evenly wraps up described reactor 301,302, and is connected to described control device 1.First heater 303 comprises resistance wire, for heating; Temperature control thermopair, for controlling the heating-up temperature of described resistance wire; Hygrosensor, for detection of the heating-up temperature of described resistance wire.Described resistance wire, temperature control thermopair and hygrosensor are all connected in control device.Wherein, first heater 303 can be set to multiple corresponding to multiple reactors, now can be different reactors different working temperatures is provided, carry out multistage water rock reaction experiment simulation under different temperatures an Integral heating device also can be set, wrap up multiple reactors, now, all reactors are operated under same temperature, carry out multistage water rock reaction experiment simulation under same temperature.That is to say, control device 1 can be controlled and multiple reactors multiple first heaters 303 of corresponding setting one by one, as shown in Figure 7; Also can control a first heater 303 for the heating of multiple reactor entirety, as shown in Figure 8.
In the present embodiment, as shown in Figure 9, described core permeability evolution on-line measuring device 5 also comprises secondary heating mechanism 504, is connected in described control device 1, is used to described core holding unit 501 to heat, and sets the experimental temperature of described core holding unit 501.In the present embodiment, described secondary heating mechanism 504 is additional hot jacket, evenly wraps up the tank that boosts of described core holding unit 501, and connects control device 1.Wherein, secondary heating mechanism 504 comprises resistance wire, for heating; Temperature control thermopair, for controlling the heating-up temperature of described resistance wire; Hygrosensor, for detection of the heating-up temperature of described resistance wire.Described resistance wire, temperature control thermopair and hygrosensor are all connected in control device 1.
In the present embodiment, as shown in figure 10, described control device 1 comprises switch board 101 and computing machine 102, for controlling and showing temperature, the temperature of described reactor 301,302 reaction solutions and the confined pressure of described core holding unit 501 for controlling and show the reaction solution that described primary heater 203 heats and the temperature of reaction solution wherein.Wherein, control device 1 is connected in gas phase pump 202 in reaction solution feeding mechanism 2 and the motor of liquid phase pump 201, controls its work, also connects pressure transducer and flow sensor in liquid phase pump 201, shows the flow velocity of reaction solution; Control device 1 also connects the first heater 303 that the multistage connects stream reaction unit 3, controls the experimental temperature of reactor; Control device 1 also connects secondary heating mechanism 504 and the pressure detector 503 of core permeability evolution on-line measuring device 5, controls the working temperature of core holding unit 501 and the pressure reduction at demonstration core holding unit 501 two ends.
In the present embodiment, as shown in figure 11, between described at least two reactors, be connected with thermode, for the temperature difference of the reaction solution of at least two reactors described in controlling.Wherein, according to the quantity difference of reactor, the quantity that thermode arranges corresponding to reactor is also different.In the time having 3 reactors in experimental provision, on the pipeline of reactor series connection, be provided with two thermodes, between two reactors, can carry out the water rock reaction experiment simulation of three phases.Equally, in the time having N reactor in experimental provision, on the pipeline of reactor series connection, be provided with N-1 thermode, between two reactors, can carry out the water rock reaction experiment simulation in N stage.
In the present embodiment, pipeline and the valve of reactor and coupled reaction still are made up of inconel625 alloy material, guarantee the corrosion of high temperature resistant, the high pressure resistant and strong alkali-acid resistance of whole device.Therefore, in the present embodiment, the maximum operating temperature of described core permeability evolution on-line measuring device 5 is 170 DEG C, and maximum working pressure (MOP) is 68MPa.The maximum operating temperature that the described multistage connects stream reaction unit 3 is 400 DEG C, and maximum working pressure (MOP) is 100MPa.
Embodiment mono-:
Figure 12 is the structural representation of a specific embodiment of Diagenesis simulation experimental apparatus of the present invention.As shown in the figure, experimental provision of the present invention comprises reactor R1, reactor R2, gas phase pump F1, liquid phase pump F2, primary heater W1, thermode W2, overvoltage protector C1, overvoltage protector C2, temperature probe T 1, temperature probe T 2, condenser W3, buffer brake controller P, gas-liquid separator S, the in-situ observation pond B1 of solution compolision original position analytical equipment, in-situ observation pond B2, fibre-optical probe X and spectroanalysis instrument G, the stopple coupon Q1 of solution on-line sampler, stopple coupon Q2 and valve V4, V5, V11, V12, the core holding unit R3 of permeability real time on-line detection device, pressure detector P1, manual pump F3, also have in addition heating arrangement (not shown) and switch board K and the computing machine M of multistage continuous stream reaction unit and permeability real time on-line detection device.The gas phase pump F1 of the present embodiment is gases at high pressure pump, and liquid phase pump F2 is highly pressurised liquid ram pump, and wherein, highly pressurised liquid ram pump F2 disposes pressure transducer and flow sensor.The outlet of highly pressurised liquid ram pump F2 and gases at high pressure pump F1 is connected with primary heater W1 entrance by valve, pipeline, and primary heater W1 outlet is communicated with the import of reactor R1, reactor R2 and core holding unit R3 respectively by heatproof three-way valve V1, V2, V13 and pipeline; Reactor R1 and reactor R2 comprise the housing of hollow, are provided with sample holder in housing, and for placing solid sample, the upper and lower two ends of housing all have opening, and filtrator is all housed, and below is fluid inlet, and top is fluid egress point; Reactor R1 outlet connects respectively temperature probe T 1, overvoltage protector C1, the online stopple coupon Q1 of solution and in-situ observation pond B1 entrance, and reactor R2 outlet connects respectively the entrance of temperature probe T 2, overvoltage protector C2, the online stopple coupon Q2 of solution and in-situ observation pond B2; Overvoltage protector C1, C2 be for when system actual pressure is higher than setting when safety value, system releasing pressure automatically, and temperature probe T 1, T2 are for measuring the temperature of reaction solution of reaction attached middle school generation; Reactor R1 outlet connects stopple coupon Q1 by valve V4, reactor R2 outlet connects stopple coupon Q2 by valve V11, stopple coupon has definite volume, the endpiece of stopple coupon Q1 connects valve V5, the endpiece of stopple coupon Q2 connects valve V12, stopple coupon, for the generation liquid in course of reaction is obtained reactor, carries out composition and content analysis; Outlet is connected with spectroanalysis instrument G by fibre-optical probe X with in-situ observation pond B2 in in-situ observation pond B1 outlet, the generation liquid of the reactor in-situ observation pond of can flowing through, utilizes spectroanalysis instrument G can under high-temperature high-pressure in-situ condition, analyze the composition and the content that in in-situ observation pond B1, B2, generate liquid; The spectroanalysis instrument of the present embodiment comprises ultraviolet-visual spectrometer, laser Raman spectrometer or infrared visible spectrophotometer, and in-situ observation pond is sapphire form pond; The outlet of sapphire form pond B1 connects three tunnels: leading up to heatproof three-way valve V6, V7, V8 and valve V9 is connected condenser W3, buffer brake controller P, gas-liquid separator S in turn, leading up to heatproof valve V6, thermode W2 and heatproof valve V10 is communicated with the import of reactor R2, leads up to heatproof three-way valve V6, V7, V8, V13 to be communicated with core holding unit R3 import; The outlet of sapphire form pond B2 connects two-way: leading up to heatproof three-way valve V7, V8 is connected condenser W3, buffer brake controller P, gas-liquid separator S in turn with valve V9, leads up to heatproof three-way valve V7, V8, V13 to be communicated with core holding unit R3 import; Wherein buffer brake controller P, for maintaining the stable of system pressure under flow state, adopts manual adjustments mode; Core holding unit R3 comprises clamper housing and surrounds the tank that boosts of clamper housing, has the cavity of placing required clamping rock core in housing; The upper and lower two ends of core holding unit R3 housing all have opening, below is fluid inlet, top is fluid egress point, endpiece forms taphole by pipeline and valve V15, entrance point is connected differential pressure detector P1 with endpiece two ends, the pressure differential that while passing through core sample for measuring fluid, core holding unit R3 housing two ends produce; Surround boosting of core holding unit housing and be surrounded by cavity between tank and clamper housing, be full of solution in cavity, manual pump F3 connects the tank interface that boosts, and the solution that compression is boosted in tank cavity produces confined pressure to core holding unit R3 housing.The heating arrangement of multistage continuous stream reaction unit and permeability real time on-line detection device is additional hot jacket, the clamper housing of encapsulation reaction still R1 and reactor R2, thermode W2 and core holding unit R3 respectively, each additional hot jacket comprises resistance wire, temperature control thermopair, hygrosensor; Resistance wire is uniform winding, encapsulation reaction still R1 and R2, thermode and core holding unit housing respectively, for heating, and temperature control thermopair controlling resistance silk heating-up temperature, hygrosensor detects Resistant heating temperature; Control device is made up of switch board K and coupled computing machine M, switch board K connects respectively the motor in gas phase pump F1 and liquid phase pump F2, pressure transducer and flow sensor, temperature probe T 1 and the T2 of liquid phase pump F2 configuration, and pressure detector P1, also connect resistance wire, temperature control thermopair and the hygrosensor of each additional hot jacket of the heating arrangement of multistage continuous stream reaction unit and permeability real time on-line detection device.
In addition, between the reactor R1 of diagenetic analogue experiment installation, reactor R2 and core holding unit R3, connected mode has adopted serial/parallel connection design.In Figure 12, to between reactor R1, reactor R2 or between reactor R1, reactor R2, core holding unit R3, be together in series by the pipeline between the pipeline between three-way valve V6 and V10 and V7, V8 and V13, and by three-way valve V1, V2, V13, reactor R1, reactor R2, core holding unit R3 are together in parallel; Under series connection, Diagenesis simulation experimental apparatus can provide multistage continuous flow experimental situation, carries out multistage water rock reaction experiment simulation; Under state in parallel, reactor R1, reactor R2 or core holding unit R3 independent operating separately, provide single water rock reaction experiment simulation, thereby increase work efficiency.
Reactor in diagenetic analogue experiment installation, valve, pipeline are made up of the corrosion resistant inconel625 alloy material of heat resisting and pressure resisting, can simulate from showing the Diagn such as raw corrosion to dark buring environment, cementing, explanation, comprise different partials pressure of carbon dioxide, H
2the corrosion of the acidic fluid such as S, organic acid and rock or mineral.
According to experiment demand, can select suitable solid sample.Solid particles of rock sample can be both mineral grain, can be also the plunger sample of natural core, and the maximum gauge of rock core post is 1 inch.Reacting gas can be carbon dioxide or sulfuretted hydrogen etc.According to the geologic media of experimental simulation, reaction solution can be natural solution, and such as oil field water, fresh water etc., can be also artificial obtain solution.
While carrying out multistage mobile Diagn simulated experiment, open reactor R1 and R2, put into respectively dissimilar rock sample 01 and 02, then sealed reactor.Set the experimental temperature of reactor R1 and R2, primary heater W1 and thermode by switch board K and computing machine M.Control valve, guarantees that Diagn simulated experiment system is unimpeded.Regulate buffer brake controller P, determine the working pressure of current system.Start highly pressurised liquid ram pump F2 and gases at high pressure pump F1, setting under experimental pressure and flow velocity, respectively reaction solution and gas are pumped to primary heater W1.In primary heater W1, the reaction solution of gas-liquid mixed is heated in advance, and flow in reactor R1.In reactor R1, reaction solution is at design temperature t
1react with rock sample 01 down, form reaction solution 001.The reaction solution 001 in-situ observation pond B1 that flows through, utilizes high-temperature high-pressure in-situ spectral analysis technique to carry out composition and content analysis to the reaction solution 001 generating.In addition, open valve V4, the reaction solution 001 generating in reactor R1 can flow in stopple coupon Q1 under high drive, valve-off V4 after having sampled.Complete after the online sampling of High Temperature High Pressure solution for reactor R1, utilize conventional analysis equipment to carry out composition and content analysis to solution in stopple coupon Q1.By high-temperature high-pressure in-situ spectral analysis and the online sample analysis of High Temperature High Pressure, can know the attribute change of the reaction solution 001 in reactor R1.The reaction solution 001 of the generation in the B1 of in-situ observation pond of flowing through continues to flow, enter thermode W2, through cooling, (simulation diagenesis process medium fluid is along moving on crack, the geological condition that causes temperature to reduce) or heat that (simulation diagenesis process medium fluid moves down along crack, the geological condition that causes temperature to increase) after, flow in reactor R2, and react with rock sample 02 under the condition of temperature t 2, form reaction solution 002.The reaction solution 002 in-situ observation pond B2 that flows through, utilizes high-temperature high-pressure in-situ spectral analysis technique to carry out composition and content analysis to reaction solution 002.In addition, open valve V11, the reaction solution 002 in reactor R2 can flow in stopple coupon Q2 under high drive, valve-off V11 after having sampled.Complete after the online sampling of High Temperature High Pressure solution for reactor R2, utilize conventional analysis equipment to carry out composition and content analysis to solution in stopple coupon Q2.Reaction solution 002 continues to flow, and after condenser W3, buffer brake controller P and gas-liquid separator S, flows into sample cup.So ongoing operation, until experiment finishes.According to experiment needs, can, by adding the parts such as reactor and thermode, provide more multistage Diagn experimental simulation.
For core permeability real-time online determination experiment, first natural core post sample 03 is put into core holding unit R3, then seal rock heart clamp holder R3.Operation manual pump F3, gives core sample 03 certain confined pressure.Reaction solution can be the solution in primary heater W1, can be also the generation liquid of reactor R1 or reactor R2.By the heating arrangement of parcel core holding unit R3 housing, can set the experimental temperature of reaction solution.In the time of reaction solution process natural core post sample 03, core holding unit R3 two ends can produce pressure differential, pressure detector P1 can record this pressure differential, can calculate the water rock reaction absolute permeability value of core sample afterwards occurs by this value, realize the transformation efficiency of quantitative description fluid to rock core internal void.
In whole experimentation, the darker buring environment of representative that imposes a condition of reactor R1, by chemical analysis reaction solution 001, can know the chemical attribute that represents fluid under this environment.Imposing a condition of reactor R2 represents shallow buring environment, by chemical analysis reaction solution 002, can know the chemical attribute that represents fluid under this environment.By thermode W2 lower the temperature and reactor R1 and reactor R2 between the temperature of reaction set poor, can simulate the change of the environmental factors such as the temperature that geologic function (structure lifting) causes fluid, this device is the effective means of research Petrogenetic Model, is conducive to the Petrogenetic Model that provides more correct.
Embodiment bis-:
Introduce the function of the present invention in Diagn research below by a specific experiment.
In Clastic Stratum of Country Rocks, can observe the carbonate cements of a large amount of existence, but be difficult to find the lysigenous secondary pores by carbonate, the lysigenous space of the aluminosilicates such as feldspar is the main body of secondary pores on the contrary, and this phenomenon and the carbonatite generally understanding more more soluble than Silicate Rocks is inconsistent.Geology man proposes carbonate retrograde solubility and explains above-mentioned phenomenon, i.e. the environment that the shallow embedding of relative low temperature is hidden is more conducive to the dissolving of carbonate mineral, and is proved by calculation of thermodynamics mode.But, the mode that adopts calculation of thermodynamics concerning Petrogenetic Model proves with explain, there is more unfavorable factor: 1) more than the data of calculation of thermodynamics from the report in document, the authenticity of data remains to be discussed; 2) mathematics computing model is difficult to geochemistry attribute and the behavior of accurate description natural bittern, and this is because the chemical composition of natural bittern is very complicated.
Utilize Diagenesis simulation experimental apparatus of the present invention to provide more to approach natural simulated conditions carbonate retrograde solubility is simulated.In order to verify carbonate retrograde solubility, the present embodiment utilizes the Diagenesis simulation experimental apparatus shown in Figure 12, the temperature of setting reactor R1 is 200 DEG C, the temperature of reactor R2 is 50 DEG C, reaction solution is pure water, rock sample adopts respectively the particle of kalzit and soda feldspar, and particle size range is 2.8～4.0mm.First, control valve, guarantees that reactor R1 and reactor R2 are connected state.Open reactor R1 and R2, put into respectively kalzit and the soda feldspar particulate samples of equivalent, then sealed reactor R1 and R2.Start highly pressurised liquid ram pump F2, pure water, with in 0.1ml/min flow velocity injected system, after system outlet flows out water, is regulated to buffer brake controller P, the working pressure of determining current system is 25MPa.The experimental temperature of setting primary heater W1 and reactor R1 is 200 DEG C, and the experimental temperature of thermode W2 and reactor 2 is 50 DEG C.According to the calculating of solution flow rate and reactor volume size, in sustained response, after 48 hours, in reactor R1 and reactor R2, solution reaches respectively metastable state.Now, open valve V4, in reactor R1, generating liquid 001 can flow in stopple coupon Q1 under high drive, valve-off V4 after having sampled.Complete after the online sampling of High Temperature High Pressure solution for reactor R1, utilize conventional analysis equipment to carry out composition and content analysis to solution in stopple coupon Q1.Open valve V11, the interior generation liquid 002 of reactor 2 can flow in stopple coupon Q2 under high drive, valve-off V11 after having sampled.Complete after the online sampling of High Temperature High Pressure solution for reactor 2, utilize conventional analysis equipment to carry out composition and content analysis to solution in stopple coupon Q2.
According to carbonate retrograde solubility, can estimate that calcium ion in reaction solution 002 is by the content higher than in reaction solution 001, the sodion in reaction solution 002 by lower than or be equivalent to the content in reaction solution 001.By this experiment, can verify that carbonate retrograde solubility, explaining in Clastic Stratum of Country Rocks, exists the effect of this geological phenomenon of the secondary hole of the aluminosilicate such as carbonate cements and feldspar corrosion in a large number.
Diagenesis simulation experimental apparatus provided by the invention, comprise two above heat resisting and pressure resisting reactors that are interconnected by pipeline and valve, can simulate different stratum buring environments, complete in different temperature and pressure conditions and keep more than two stage water rock course of reaction in fluid continuous flow situation, realize continuous multistage water rock reaction experiment simulation, this will contribute to make in the experimental phase fluid chemistry character closer to natural actual conditions.In the experimentation of multistage continuous flow, by copying temperature, pressure, fluid chemistry character, mineral composition and the flow performance of different phase in diagenesis mechanism, can effectively simulate due to Diagn such as corrosion that basin lifting causes temperature in actual formation, pressure, fluid properties to change to cause, cementing, explanations; Diagenesis simulation experimental apparatus of the present invention have the fast and temperature of high temperature high voltage resistant, heating evenly, stable pressurization, high-temperature high-pressure in-situ analytical solution composition, High Temperature High Pressure sample online, High Temperature High Pressure detects the functions such as permeability online, not only can simulate open flow system but also can simulate the water rock reaction under static closed system, especially can simulate more truly by the experiment of multistage continuous stream the Diagn that actual formation occurs; Again in conjunction with High Temperature High Pressure solution compolision original position analytical technology and the online sampling technique of High Temperature High Pressure solution, can analyze the fluid properties of each elementary reaction generation liquid, so just realize the experimental simulation to Petrogenetic Model, contributed to provide Petrogenetic Model more accurately; Utilize core permeability evolution on-line measuring device, can effectively simulate cover press and hot conditions under water rock between true core and fluid react, and can detect in real time, online the permeability value of rock core, realize the transformation efficiency of quantitative description fluid to rock core internal void.
According to Diagn simulation experiment study content, experiment can be both cylindrical shape with rock sample, also graininess.Testing required high pressure is from fluid reservoir, to be extracted solution and compressed institute by highly pressurised liquid ram pump to be produced, test required high temperature and be that high heat that electric heating cover that the uniform winding resistance wire by being wrapped in reactor outside makes produces realizes, because resistance wire is uniform winding, so temperature of reaction kettle is uniform.The temperature of whole device and pressure control both can have been passed through the control panel manual adjustments of switch board, can select again computer operation.The inlet end of reactor connects primary heater or thermode, for heating in advance or cooling reacting fluid, can reduce and even avoid the temperature difference of fluid in reactor.Valve is equipped with at the outlet of reactor and entrance two ends, and by control valve, reactor can carry out static capping system also can provide open flow reaction system.The endpiece of reactor connects the online sampler of High Temperature High Pressure, and this device can obtain the generation liquid in reactor in course of reaction, for composition and content analysis; The endpiece of reactor also connects in-situ observation pond, fibre-optical probe is connected in-situ observation pond with spectrometer, in multistage continuous flow reaction system, the generation liquid of the reactor in-situ observation pond of can flowing through, now, utilize spectrometer can under high-temperature high-pressure in-situ condition, analyze the composition and the content that in observation pond, generate liquid.When fluid is through in core holding unit when rock core cylinder sample, core holding unit two ends can produce pressure differential, and the differential pressure detector that this value can be equipped with by core holding unit two ends records, permeability that can computing rock sample by this value.Core holding unit confined pressure is produced by solution in the tank that boosts of manual pump compression clamper.In addition, connected mode between multiple reactors of diagenetic process analogue experiment installation and between reactor and core holding unit has adopted the serial/parallel design that is connected, under series connection, Diagenesis simulation experimental apparatus can provide multistage continuous flow experimental situation, carries out multistage water rock reaction experiment simulation; Under state in parallel, reactor or core holding unit independent operating separately, provides single stage water rock reaction experiment simulation, thereby increases work efficiency.And reactor, valve, pipeline all adopt inconel625 alloy material to make, this just guarantees that whole device can high temperature resistant, high pressure resistant and strong alkali-acid resistance corrosion.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (19)
1. a Diagenesis simulation experimental apparatus, it is characterized in that, described Diagenesis simulation experimental apparatus is used for simulating fluid and reacts with water rock in the migration of rock interior hole, and real-time online mensuration fluid properties and permeability variation, it comprises control device, reaction solution feeding mechanism, multistage continuous stream reaction unit, solution compolision original position analytical equipment and core permeability evolution on-line measuring device;
Wherein, described control device is connected to described reaction solution feeding mechanism, described multistage continuous stream reaction unit and described core permeability evolution on-line measuring device; Described reaction solution feeding mechanism is connected to described multistage continuous stream reaction unit and described core permeability evolution on-line measuring device; Described multistage continuous stream reaction unit is connected in described solution compolision original position analytical equipment; Described core permeability evolution on-line measuring device is connected to described multistage continuous stream reaction unit and described reaction solution feeding mechanism;
Described in described control device control, reaction solution feeding mechanism is under the pressure of setting and flow velocity, from outside abstraction reaction solution and reacting gas, and described reaction solution and reacting gas are sent to described multistage continuous stream reaction unit or described core permeability evolution on-line measuring device;
Described multistage continuous stream reaction unit comprises at least two reactors, places rock to be measured in described reactor, and described rock to be measured reacts with described reaction solution, and reaction of formation generates liquid; Wherein, adopt design connected in series or in parallel between described reactor, under series connection, described reactor, for simulated experiment provides multistage continuous flow experimental situation to Diagn, carries out multistage water rock reaction experiment simulation; Under state in parallel, each described reactor independent operating separately, provides single stage water rock reaction simulation experiment;
Described reaction solution flow into described solution compolision original position analytical equipment, analyzes composition and the content of described reaction solution under high-temperature and high-pressure conditions;
Described core permeability evolution on-line measuring device is used for placing rock core to be measured, and reacts with described reaction solution or described reaction solution, in real time, detect online the permeability of described rock core to be measured; Wherein, described core permeability evolution on-line measuring device comprises core holding unit, manual pump and pressure detector; Between described core holding unit and described reactor, adopt design connected in series or in parallel, under series connection, described core holding unit and described reactor are used for carrying out multistage water rock reaction experiment simulation, under state in parallel, described reactor and core holding unit independent operating separately, provides single stage water rock reaction experiment simulation.
2. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, described reaction solution feeding mechanism comprises:
Liquid phase pump, for setting the required flow velocity of experiment, and from outside abstraction reaction solution, and provide experiment required pressure by compression solution;
Gas phase pump, under pressure and flow velocity described, extracts external reaction gas;
Primary heater, heats for the reaction solution that described reaction solution and reacting gas is carried out to gas-liquid mixed generation.
3. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, described Diagenesis simulation experimental apparatus also comprises:
At least two solution on-line samplers, correspondence is connected at least two reactors in described multistage continuous stream reaction unit, for the reaction solution of at least two reactors described in obtaining online under High Temperature High Pressure.
4. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, the described multistage connects stream reaction unit and also comprises:
At least two hygrosensors, at least two reactors described in correspondence is connected in, and connect described control device, for detection of the temperature of the reaction solution in corresponding reactor, and feed back to described control device demonstration.
5. Diagenesis simulation experimental apparatus as claimed in claim 3, is characterized in that, described Diagenesis simulation experimental apparatus also comprises:
At least two overvoltage protectors, the exit of at least two reactors described in being arranged on, for when analogue experiment installation actual pressure is higher than setting when safety value, system releasing pressure automatically.
6. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, described solution compolision original position analytical equipment comprises at least two in-situ observation ponds, fibre-optical probe and spectroanalysis instruments;
At least two reactors described in described at least two in-situ observation pond correspondences are connected in, and be connected with described spectroanalysis instrument by described fibre-optical probe, composition and the content of described corresponding reaction kettle for reaction generation liquid analyzed for high-temperature high-pressure in-situ.
7. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, described core permeability evolution on-line measuring device comprises core holding unit, manual pump and pressure detector; Wherein, described core holding unit is connected to described manual pump and described pressure detector;
Described core holding unit is used for clamping described rock core to be measured; Described manual pump provides default confined pressure for described core holding unit; Described pressure detector connects described control device, for measuring the pressure reduction at described core holding unit two ends, and gives described control device by described Pressure difference feedback, and real-time online detects the permeability of described rock core to be measured.
8. Diagenesis simulation experimental apparatus as claimed in claim 7, is characterized in that, described core holding unit comprises clamper housing and the tank that boosts, described in the tank that boosts surround described clamper housing;
The tank that boosts described in described manual pump connects, by the solution boosting between tank and described clamper housing described in described manual pump compression, provides the confined pressure of described clamper housing; Described pressure detector is connected to described clamper housing two ends, for measuring the pressure reduction at described core holding unit two ends.
9. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, the described multistage connects stream reaction unit and also comprises:
First heater, described in being used to, at least two reactors heat, and set the temperature of the reaction solution in described reactor.
10. Diagenesis simulation experimental apparatus as claimed in claim 9, is characterized in that, described first heater is additional hot jacket, evenly at least two reactors described in parcel, and connect described control device, it comprises:
Resistance wire, for heating;
Temperature control thermopair, for controlling the heating-up temperature of described resistance wire;
Hygrosensor, for detection of the heating-up temperature of described resistance wire.
11. Diagenesis simulation experimental apparatus as claimed in claim 8, is characterized in that, described core permeability evolution on-line measuring device also comprises:
Secondary heating mechanism, is used to described core holding unit heating, sets the experimental temperature of the reaction solution in described core holding unit.
12. Diagenesis simulation experimental apparatus as claimed in claim 11, is characterized in that, described secondary heating mechanism is additional hot jacket, evenly wrap up the tank that boosts of described core holding unit, and connect described control device, and it comprises:
Resistance wire, for heating;
Temperature control thermopair, for controlling the heating-up temperature of described resistance wire;
Hygrosensor, for detection of the heating-up temperature of described resistance wire.
13. Diagenesis simulation experimental apparatus as described in claim 1～12 any one, it is characterized in that, described control device comprises switch board and computing machine, for controlling and show that the temperature of the reaction solution of described primary heater heating, described reaction kettle for reaction generate the temperature of liquid and the confined pressure of described core holding unit and the temperature of reaction solution wherein.
14. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, between described at least two reactors, are connected with thermode, for the temperature setting of the reaction solution of described at least two reactors is set to difference.
15. Diagenesis simulation experimental apparatus as claimed in claim 2, is characterized in that, described reaction solution comprises fresh water, obtain solution or oil field water.
16. Diagenesis simulation experimental apparatus as claimed in claim 2, is characterized in that, described reacting gas comprises carbon dioxide or sulfuretted hydrogen.
17. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, the maximum operating temperature of described core permeability evolution on-line measuring device is 170 DEG C, and maximum working pressure (MOP) is 68MPa.
18. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, the maximum operating temperature that the described multistage connects stream reaction unit is 400 DEG C, and maximum working pressure (MOP) is 100MPa.
19. Diagenesis simulation experimental apparatus as claimed in claim 1, is characterized in that, described reactor is made up of inconel625 alloy material.
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| 可多点监测的岩心渗透率测试仪设计;蔡昌新;《石油机械》;20090710;第37卷(第6期);第39-40页 * |
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| 袁洪福 褚小立 陆婉珍等.一种新型在线近红外光谱分析仪的研制.《分析化学》.2004,第32卷(第2期),全文. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442943A (en) * | 2016-11-24 | 2017-02-22 | 中国石油天然气股份有限公司 | Shale reservoir diagenetic fracture simulation experiment device and method |
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