CN105241778A - Spontaneous imbibition measurement apparatus and experiment method thereof - Google Patents
Spontaneous imbibition measurement apparatus and experiment method thereof Download PDFInfo
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Abstract
The invention provides a spontaneous imbibition measurement apparatus and an experiment method thereof. The spontaneous imbibition measurement apparatus comprises: a box body having a measurement chamber and a sample chamber, wherein the measurement chamber is positioned above the sample chamber; a container positioned in the sample chamber, wherein a liquid to be measured and a rock sample to be measured are contained in the container, and the rock sample to be measured intrudes into the liquid to be measured, is clamped by a rock sample clamper, and is connected with a resistivity measuring instrument; a weighing mechanism positioned in the measurement chamber and connected with the rock sample clamper through a suspension rope; and a conductivity measurement mechanism positioned in the measurement chamber and connected with a conductivity electrode stretching into the liquid to be measured. The spontaneous imbibition measurement apparatus and the experiment method thereof allow the spontaneous imbibitions capability of unconventional reservoir rocks in different stratums or in different positions of a same stratum to be rapidly and accurately evaluated, and provide base data for researches of recycling of fracturing fluids.
Description
Technical field
The present invention has about the spontaneous imbibition measurement mechanism of one and experimental technique thereof, especially has the spontaneous imbibition measurement mechanism about applying in a kind of exploratory development experiment field and experimental technique thereof.
Background technology
China's unconventional petroleum resources rich reserves, its exploratory development more and more receives publicity, and for solving produced problem in engineering, experimental study also progressively deeply.Unconventional reservoir hole throat is little, and capillary force is large, there is obvious spontaneous imbibition phenomena.Spontaneous imbibition refers to that a kind of wetting fluid in blowhole spontaneously replaces the process of another kind of nonwetting fluid under capillary force action, and it is the important mechanism affecting Low Permeability Reservoir Fracturing.Most important at the imbibition mechanism of different low permeability formation rock core by the spontaneous imbibition in indoor experimental study fluid.
First, the fracturing liquid that Different Strata uses is different, and the different fracturing liquid of needs assessment is to the adaptability of same formation.Secondly, in the process of secondary fracturing, due to the existence of a pressure break injury, the suction capacity on stratum in refracturing process is caused to change, can repeatedly evaluate same rock core, study the difference of repeatedly imbibition, thus the Injury Mechanism of fracturing liquid formation when probing into refracturing.In addition, when taking shale as the unconventional reservoir pressure break of representative, fluid volume is huge, causes to return discharge opeing and be treated as a great problem, and the situation of change of research imbibition process peripheral liquid component is also of practical significance very much.
Take shale as the unconventional reservoir of representative, fracturing fluid recovery (backflow) rate is lower, and a large amount of fracturing liquids is detained in the earth formation.This kind of reservoir, general blowhole throat is little, and clearly, under the effect of capillary force, fracturing liquid, in the middle of the spontaneous imbibition to Rock Matrix of crack, forms Water trapping and causes the not easily row of returning capillary force effect.Therefore, fracturing liquid is studied particularly important in the spontaneous imbibition rule of different reservoir.
Unconventional reservoir hole throat is little, the time that spontaneous imbibition experiment needs is longer, experiment is easy to the impact being subject to the external disturbance such as environment temperature, humidity, conventional measurement mechanism cannot meet the accuracy requirement of measurement, and cannot monitor information and the flow expansion state of liquid in rock sample of rock sample solvent components in imbibition process.
At present, after rock sample is processed into Standard rock sample, rock sample is placed with in airtight core container, the water suction situation of rock can be measured.I.e. immersion in core container, and the glass tube of the height of water can be measured in a termination one of cylinder, and monitor for liquid level in glass tube.After rock sample water suction, the liquid level in glass tube declines.By record liquid level falling head over time, then pass through the product of glass tube cross-sectional area and liquid level falling head, calculate rock and suck the quality of water over time.
But the method can cause some artificial and systematic errors, causes the inaccurate of measurement result, and in addition, this measurement mechanism can only be measured whole rock core and suck the quality of water over time, does not obtain other data message, has certain limitation.Secondly, adopt this device to carry out spontaneous imbibition experiment, need to drill through rock core, be polished to standard rock core after measure, sample preparation flow process is loaded down with trivial details, high cost and cause extend experimental period, brings inconvenience to data acquisition.
Summary of the invention
The object of this invention is to provide a kind of spontaneous imbibition measurement mechanism, it can evaluate the spontaneous imbibition ability of the unconventional reservoir rock of Different Strata or same stratum diverse location fast and accurately, recycles provide basic data for probing into fracturing liquid.
Another object of the present invention is to provide spontaneous imbibition experimental technique in, and it can evaluate the spontaneous imbibition ability of the unconventional reservoir rock of Different Strata or same stratum diverse location fast and accurately, recycles provide basic data for probing into fracturing liquid.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides a kind of spontaneous imbibition measurement mechanism, described spontaneous imbibition measurement mechanism comprises:
Casing, it has measuring chamber and sample chamber, and described measuring chamber is positioned at the top of described sample chamber;
Container, it is positioned at described sample chamber, is loaded with testing liquid and rock sample to be measured in described container, and described rock sample to be measured invades in described testing liquid, and by a rock sample gripper, described rock sample to be measured is connected with resistivity measuring instrument;
Weighing mechanism, it is positioned at described measuring chamber, and described weighing mechanism is connected with described rock sample clamper by an outstanding rope;
Conductivity measurement mechanism, it is positioned at described measuring chamber, and described conductivity measurement mechanism is connected with a conductivity electrode, and described conductivity electrode stretches in described testing liquid.
In a preferred embodiment, interconnective heating element and radiator valve is respectively equipped with in described sample chamber and described measuring chamber.
In a preferred embodiment, temperature sensor is respectively equipped with in described sample chamber and described measuring chamber.
In a preferred embodiment, the periphery of described sample chamber and described measuring chamber has been sticked insulation material layer respectively.
In a preferred embodiment, the bottom of described sample chamber is provided with ventilating opening.
In a preferred embodiment, leve monitor is provided with in described container.
In a preferred embodiment, liquid level supplies is inserted with in described container.
In a preferred embodiment, the below of described sample chamber is connected with crane.
In a preferred embodiment, the below of described casing is connected with damping.
In a preferred embodiment, described weighing mechanism has quality signal output terminal, and described conductivity measurement mechanism has conductivity signal output terminal, and described quality signal output terminal and described conductivity signal output terminal are electrically connected with computing machine respectively.
The present invention also provides a kind of spontaneous imbibition experimental technique of spontaneous imbibition measurement mechanism as above, and described spontaneous imbibition experimental technique comprises the steps:
A) one rock sample to be measured is provided, cleans described rock sample to be measured, and dry described rock sample to be measured;
B), after the rock sample described to be measured after drying being weighed dry weight, fix described rock sample to be measured with a rock sample clamper, and on described rock sample to be measured contact resistance rate measuring instrument;
C), after injecting testing liquid in the container of described spontaneous imbibition measurement mechanism, described rock sample clamper, described rock sample to be measured and described resistivity measuring instrument are invaded in described testing liquid;
D) weighing mechanism and the conductivity measurement mechanism of described spontaneous imbibition measurement mechanism is opened, described weighing mechanism connects described rock sample clamper by an outstanding rope, described conductivity measurement mechanism connects a conductivity electrode, and one end of described conductivity electrode is stretched in described testing liquid;
E) record the data that described weighing mechanism, described conductivity measurement mechanism and described resistivity measuring instrument are measured, and analyze described data.
In a preferred embodiment, described step a) in, described rock sample to be measured is put into air blast dryer and dries, the bake out temperature of described air blast dryer is 60 degree.
In a preferred embodiment, described rock sample to be measured is dried 48 hours in described air blast dryer.
Feature and the advantage of spontaneous imbibition measurement mechanism of the present invention and experimental technique thereof are: the present invention can when avoiding external disturbance, evaluate the spontaneous imbibition ability of the unconventional reservoir rock of Different Strata or same stratum diverse location fast and accurately, the real-time change rule of testing liquid ion in imbibition process can be obtained again, recycle for probing into fracturing liquid basic data is provided; In addition, by the resistivity of rock sample to be measured in imbibition process over time, the flow expansion state of testing liquid in rock sample to be measured can be inferred.Structure of the present invention is simple, easy for installation, can not only measure rock sample to be measured constant temperature normal pressure, liquid level keep constant under, in spontaneous suction liquid process, the quality of rock over time, and can under simulated formation temperature conditions, obtain fracturing liquid conductivity situation over time in spontaneous imbibition process, thus understand the stripping situation etc. of the rate of water absorption of rock sample to be measured, capillary force, water absorbing capacity and rock sample intermediate ion to be measured.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of spontaneous imbibition measurement mechanism of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, the invention provides a kind of spontaneous imbibition measurement mechanism, it comprises casing 1, and this casing 1 has measuring chamber 2 and sample chamber 3, and described measuring chamber 2 is positioned at the top of described sample chamber 3; Container 31 is positioned at described sample chamber 3, testing liquid 32 and rock sample to be measured 33 is loaded with in described container 31, described rock sample to be measured 33 invades in described testing liquid 32, and is clamped by a rock sample clamper 331, and described rock sample 33 to be measured is connected with resistivity measuring instrument 34; Weighing mechanism 21 is positioned at described measuring chamber 2, and described weighing mechanism 21 is connected with described rock sample clamper 331 by an outstanding rope 22; Conductivity measurement mechanism 23 is positioned at described measuring chamber 2, and described conductivity measurement mechanism 23 is connected with a conductivity electrode 231, and described conductivity electrode 231 stretches in described testing liquid 32.
Specifically, casing 1 is the container of a sealing, is connected with damping 11 below it, and this damping 11 provides the stable environment of anti-external disturbance for whole experimental facilities.Have airtight measuring chamber 2 and airtight sample chamber 3 in casing 1, measuring chamber 2 is positioned at the top of sample chamber 3.
Be placed with container 31 in sample chamber 3, this container 31 is such as beaker or experiment container, does not limit at this.Testing liquid 32 is placed with in container 31, invade in this testing liquid 32 after rock sample 33 to be measured is fixing by a rock sample clamper 331, in the present invention, this rock sample 33 to be measured can use the landwaste in drilling process, and the present invention does not limit the shape of rock sample 33 to be measured and size requirements.This rock sample 33 to be measured is connected with resistivity measuring instrument 34, and this resistivity measuring instrument 34 is for monitoring the change in resistance of rock sample 33 to be measured in spontaneous imbibition process and recording this data, and in the present invention, the precision of this resistivity measuring instrument 34 can reach 0.01 Ω m.
In the present embodiment, interconnective heating element 35 and radiator valve 36 is provided with in sample chamber 3, temperature sensor 37 is also provided with in this sample chamber 3, wherein, this temperature sensor 37 is for responding to the temperature in sample chamber 3, controlled the duty of heating element 35 by radiator valve 36, regulate sample chamber 3 to remain on a temperature constant state; In the present invention, be provided with ventilating opening 38 bottom sample chamber 3, this ventilating opening 38 is for for carrying out ventilation process in sample chamber 3; Further, the periphery of this sample chamber 3 has also been sticked insulation material layer 39, and this insulation material layer 39, for ensureing the temperature in sample chamber 3, prevents the temperature of sample chamber 3 from outwards transmitting.
Further, in the present invention, in container 31, be also provided with leve monitor 311, in this container 31, be also inserted with liquid level supplies 312.This leve monitor 311 is for detecting the liquid level change of the testing liquid 32 in measuring process, and when causing the liquid level change of testing liquid 32 because of factors such as evaporation, imbibitions, the testing liquid in the automatic compensation tank 31 of liquid level supplies 312 is to initial liquid level.
In addition, the below of this sample chamber 3 is also connected with crane 30, and the height of this sample chamber 3 regulates by crane 30.
Weighing mechanism 21 and conductivity measurement mechanism 23 is placed with in measuring chamber 2, this weighing mechanism 21 clamps 331 by outstanding rope 22 with the rock sample of the rock sample 33 fixing to be measured in sample chamber 3 and is connected, in the present embodiment, outstanding rope 22 makes (polyethylene by polythene material, PE), its diameter is not more than 0.128mm; This conductivity measurement mechanism 23 is connected with conductivity electrode 231, and this conductivity electrode 231 stretches in the testing liquid 32 in the container 31 of sample chamber 3.In the present invention, the precision of this weighing mechanism 21 can reach 0.01mg, and the precision of conductivity measurement mechanism 23 can reach 0.001mS/cm.
In the present embodiment, interconnective heating element 24 and radiator valve 25 is provided with in measuring chamber 2, temperature sensor 26 is also provided with in this measuring chamber 2, wherein, this temperature sensor 26 is for the temperature in measurement of inductance room 2, controlled the duty of heating element 24 by radiator valve 25, regulate measuring chamber 2 to remain on a temperature constant state; Further, the periphery of measuring chamber 2 has also been sticked insulation material layer 27, and this insulation material layer 27, for ensureing the temperature in measuring chamber 2, prevents the temperature of measuring chamber 2 from outwards transmitting.
Further, this weighing mechanism 21 has quality signal output terminal 211, and this conductivity measurement mechanism 23 has conductivity signal output terminal 232, and this quality signal output terminal 211 and conductivity signal output terminal 232 are electrically connected with computing machine respectively.After rock sample 33 to be measured sucks testing liquid 32, the quality change in time sucking the rock sample to be measured 33 of testing liquid 32 can be delivered on weighing mechanism 21 by outstanding rope 22, this weighing mechanism 21 by quality in time change transitions be electric signal, and by quality signal output terminal 211, electric signal is inputted computing machine and carries out subsequent treatment; Absorb in the process of testing liquid 32 at rock sample 33 to be measured, conductivity measurement mechanism 23 can detect conductivity situation over time in testing liquid 32 by conductivity electrode 231, and imports electric signal into computing machine in real time by conductivity signal output terminal 232 and carry out subsequent treatment.
The experimentation of spontaneous imbibition measurement mechanism of the present invention is as follows:
1) first cleaned by rock sample 33 to be measured, put into air blast dryer and dry, the bake out temperature of air blast dryer is set to 60 degrees Celsius, and drying time is depending on the size of rock sample 33 to be measured.The quality of general oven dry rock sample 33 to be measured after 48 hours no longer changes, and thinks rock sample 33 to be measured drying.
2) weighing mechanism 21, conductivity measurement mechanism 23, resistivity measuring instrument 34 and computing machine is opened, respectively the quality signal output terminal 211 of weighing mechanism 21 is connected with computing machine with the conductivity signal output terminal 232 of conductivity measurement mechanism 23, the quality exported by computer recording weighing mechanism 21 and the time dependent data of conductivity of testing liquid 32, guarantee that data transmission is accurate.Then, rock sample to be measured 33 after drying is weighed dry weight, and fix rock sample 33 to be measured with rock sample clamper 331, backward container 31 in inject testing liquid 32, open leve monitor 311 and liquid level supplies 312, outstanding rope 22 be connected with weighing mechanism 21 and rock sample clamper 331, slow adjustment crane 30, be immersed in testing liquid 32 by rock sample 33 to be measured, weighing mechanism 21 resets, and starts the water suction quality situation of change in time recording rock sample 33 to be measured; Conductivity electrode 231, resistivity measuring instrument 34 are put into testing liquid 32, the record conductivity of testing liquid 32, the resistivity situation over time of rock sample to be measured 33 simultaneously.
3) by the data analysis of computer recording, draw the parameter such as the maximum water absorbing capacity of rock sample 33 to be measured, rate of water absorption (rate of curve that water suction quality changes with absorbent time), the conductivity of testing liquid 32, the change in resistance rule of rock sample to be measured 33, complete this rock sample 33 to be measured and testing liquid 32 (being also fracturing liquid) the on-the-spot indoor comprehensive evaluation of spontaneous imbibition.
Spontaneous imbibition measurement mechanism of the present invention, has following features and advantage:
1, this spontaneous imbibition measurement mechanism pooled samples room 3, measuring chamber 2 and measuring-signal output of one, there is integration, spontaneous imbibition and conductivity measurement are synchronously carried out, this spontaneous imbibition measurement mechanism entirety is body structure, anti-external interference ability is strong, convenient carrying, damping 11 is arranged at bottom, effectively ensures data precision.
2, this spontaneous imbibition measurement mechanism to the shape of rock sample 33 to be measured and size requirements not high, the landwaste in drilling process can be used, the spontaneous imbibition ability of reservoir is evaluated, not need down-hole to get core and rock core polishing, save experimental cost and time.
3, this spontaneous imbibition measurement mechanism is simple to operate, when using this spontaneous imbibition measurement mechanism to carry out spontaneous imbibition experiment, the resistivity of the quality of rock sample 33 to be measured, the conductivity of testing liquid 32 and rock sample to be measured 33 changes in time all can pass through computer-automatic collection, without the need to artificial guard, and three groups of different pieces of informations can be obtained simultaneously, make rock sample 33 to be measured spontaneous imbibition evaluating data abundanter.
4, this spontaneous imbibition measurement mechanism is equipped with leve monitor 311 and liquid level supplies 312, in long-time spontaneous imbibition process, can keep the liquid level constant of testing liquid 32, reduces the error that in mensuration process, liquid level difference causes, and ensures experimental precision.
5, this spontaneous imbibition measurement mechanism is equipped with crane 30, on the one hand, in the process of submergence rock sample 33 to be measured, and comparatively artificial input rock sample 33 to be measured, process is mild, is beneficial to rock sample 33 blibbing to be measured and discharges, ensure the accuracy of primary data; On the other hand, the submergence height of rock sample 33 to be measured can conveniently be controlled; In addition, the present invention can do shale samples forward self-priming or the experiment of reverse self-priming by unrestricted choice, also be, by the different lateral selecting rock sample 33 to be measured to contact with testing liquid 32, the forward self-priming realizing rock sample 33 to be measured and reverse self-priming (being forward self-priming when liquid is identical with the flow direction of gas, is reverse self-priming when liquid is contrary with the flow direction of gas).
6, this spontaneous imbibition measurement mechanism can to monitor in imbibition process fracturing liquid conductivity over time quick and easy, accurately, on the one hand, Different Strata rock sample solvent components information in this process can be obtained, this information is equipped with different conductivity electrode 231 by conductivity measurement mechanism 23 and realizes, not only can measure the conductivity of testing liquid 32, can also can measure the ionic type in testing liquid 32, thus determine the fracturing liquid formula meeting local geologic media; On the other hand, can be fracturing fluid recovery (backflow) process and basic data is provided.
Spontaneous imbibition measurement mechanism of the present invention, can when avoiding external disturbance, evaluate the spontaneous imbibition ability of the unconventional reservoir rock of Different Strata or same stratum diverse location fast and accurately, the real-time change rule of testing liquid ion in imbibition process can be obtained again, recycle for probing into fracturing liquid basic data is provided; In addition, by the resistivity of rock sample to be measured in imbibition process over time, the flow expansion state of testing liquid in rock sample to be measured can be inferred.Structure of the present invention is simple, easy for installation, can not only measure rock sample to be measured constant temperature normal pressure, liquid level keep constant under, in spontaneous suction liquid process, the quality of rock over time, and can under simulated formation temperature conditions, obtain fracturing liquid conductivity situation over time in spontaneous imbibition process, thus understand the stripping situation etc. of the rate of water absorption of rock sample to be measured, capillary force, water absorbing capacity and rock sample intermediate ion to be measured.
Embodiment two
As shown in Figure 1, the present invention also provides a kind of spontaneous imbibition experimental technique of spontaneous imbibition measurement mechanism, described spontaneous imbibition measurement mechanism is the spontaneous imbibition measurement mechanism described in embodiment one, the structure of this spontaneous imbibition measurement mechanism, principle of work and beneficial effect are identical with embodiment one, do not repeat them here.This spontaneous imbibition experimental technique comprises the steps:
A) one rock sample 33 to be measured is provided, cleans described rock sample to be measured 33, and dry described rock sample to be measured 33;
B) by dry after rock sample 33 described to be measured weigh dry weight after, fix described rock sample to be measured 33 with a rock sample clamper 331, and on described rock sample 33 to be measured contact resistance rate measuring instrument 34;
C), after injecting testing liquid 32 in the container 31 of described spontaneous imbibition measurement mechanism, described rock sample clamper 331, described rock sample 33 to be measured and described resistivity measuring instrument 34 are invaded in described testing liquid 32;
D) weighing mechanism 21 and the conductivity measurement mechanism 23 of described spontaneous imbibition measurement mechanism is opened, described weighing mechanism 21 connects described rock sample clamper 331 by an outstanding rope 22, described conductivity measurement mechanism 23 connects a conductivity electrode 231, and one end of described conductivity electrode 231 is stretched in described testing liquid 32;
E) record the data that described weighing mechanism 21, described conductivity measurement mechanism 23 and described resistivity measuring instrument 34 are measured, and analyze described data.
Specifically, described step a) in, rock sample 33 to be measured is put into air blast dryer and dries, the bake out temperature of described air blast dryer is 60 degrees Celsius.This rock sample to be measured is dried 48 hours in air blast dryer, and the drying time of rock sample 33 to be measured is depending on the size of rock sample 33 to be measured, and general quality of drying rock sample 33 to be measured after 48 hours no longer changes, and thinks rock sample 33 to be measured drying.
In step b) in, rock sample to be measured 33 after drying is weighed dry weight, and fix rock sample 33 to be measured with rock sample clamper 331, backward container 31 in inject testing liquid 32, open the leve monitor 311 that is arranged on container 31 and insert liquid level supplies 312 in container 31.
In step c) in, open weighing mechanism 21, conductivity measurement mechanism 23, resistivity measuring instrument 34, respectively the quality signal output terminal 211 of weighing mechanism 21 is connected with computing machine with the conductivity signal output terminal 232 of conductivity measurement mechanism 23, the quality exported by computer recording weighing mechanism 21 and the conductivity delta data in time of testing liquid 32, guarantee that data transmission is accurate.Then, be connected with weighing mechanism 21 and rock sample clamper 331 by outstanding rope 22, slowly regulate crane 30, be immersed in testing liquid 32 by rock sample 33 to be measured, weighing mechanism 21 resets, and starts the water suction quality situation of change in time recording rock sample 33 to be measured; Conductivity electrode 231, resistivity measuring instrument 34 are put into testing liquid 32, the record conductivity of testing liquid 32, the resistivity situation over time of rock sample to be measured 33 simultaneously.
In steps d) in, by the data analysis of computer recording, draw the parameter such as the maximum water absorbing capacity of rock sample 33 to be measured, rate of water absorption (rate of curve that water suction quality changes with absorbent time), the conductivity of testing liquid 32, the change in resistance rule of rock sample to be measured 33, complete this rock sample 33 to be measured and testing liquid 32 (being also fracturing liquid) the on-the-spot indoor comprehensive evaluation of spontaneous imbibition.
Spontaneous imbibition experimental technique of the present invention, can when avoiding external disturbance, evaluate the spontaneous imbibition ability of the unconventional reservoir rock of Different Strata or same stratum diverse location fast and accurately, the real-time change rule of testing liquid ion in imbibition process can be obtained again, recycle for probing into fracturing liquid basic data is provided; In addition, by the resistivity of rock sample to be measured in imbibition process over time, the flow expansion state of testing liquid in rock sample to be measured can be inferred.Structure of the present invention is simple, easy for installation, can not only measure rock sample to be measured constant temperature normal pressure, liquid level keep constant under, in spontaneous suction liquid process, the quality of rock over time, and can under simulated formation temperature conditions, obtain fracturing liquid conductivity situation over time in spontaneous imbibition process, thus understand the stripping situation etc. of the rate of water absorption of rock sample to be measured, capillary force, water absorbing capacity and rock sample intermediate ion to be measured.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (13)
1. a spontaneous imbibition measurement mechanism, is characterized in that, described spontaneous imbibition measurement mechanism comprises:
Casing, it has measuring chamber and sample chamber, and described measuring chamber is positioned at the top of described sample chamber;
Container, it is positioned at described sample chamber, is loaded with testing liquid and rock sample to be measured in described container, and described rock sample to be measured invades in described testing liquid, and by a rock sample gripper, described rock sample to be measured is connected with resistivity measuring instrument;
Weighing mechanism, it is positioned at described measuring chamber, and described weighing mechanism is connected with described rock sample clamper by an outstanding rope;
Conductivity measurement mechanism, it is positioned at described measuring chamber, and described conductivity measurement mechanism is connected with a conductivity electrode, and described conductivity electrode stretches in described testing liquid.
2. spontaneous imbibition measurement mechanism as claimed in claim 1, is characterized in that, is respectively equipped with interconnective heating element and radiator valve in described sample chamber and described measuring chamber.
3. spontaneous imbibition measurement mechanism as claimed in claim 1, is characterized in that, is respectively equipped with temperature sensor in described sample chamber and described measuring chamber.
4. spontaneous imbibition measurement mechanism as claimed in claim 1, is characterized in that, the periphery of described sample chamber and described measuring chamber has been sticked insulation material layer respectively.
5. spontaneous imbibition measurement mechanism as claimed in claim 1, it is characterized in that, the bottom of described sample chamber is provided with ventilating opening.
6. spontaneous imbibition measurement mechanism as claimed in claim 1, is characterized in that, be provided with leve monitor in described container.
7. spontaneous imbibition measurement mechanism as claimed in claim 1, is characterized in that, be inserted with liquid level supplies in described container.
8. spontaneous imbibition measurement mechanism as claimed in claim 1, it is characterized in that, the below of described sample chamber is connected with crane.
9. spontaneous imbibition measurement mechanism as claimed in claim 1, it is characterized in that, the below of described casing is connected with damping.
10. spontaneous imbibition measurement mechanism as claimed in claim 1, it is characterized in that, described weighing mechanism has quality signal output terminal, and described conductivity measurement mechanism has conductivity signal output terminal, and described quality signal output terminal and described conductivity signal output terminal are electrically connected with computing machine respectively.
The spontaneous imbibition experimental technique of the spontaneous imbibition measurement mechanism of 11. 1 kinds of employings according to any one of claim 1 ~ 10, it is characterized in that, described spontaneous imbibition experimental technique comprises the steps:
A) one rock sample to be measured is provided, cleans described rock sample to be measured, and dry described rock sample to be measured;
B), after the rock sample described to be measured after drying being weighed dry weight, fix described rock sample to be measured with a rock sample clamper, and on described rock sample to be measured contact resistance rate measuring instrument;
C), after injecting testing liquid in the container of described spontaneous imbibition measurement mechanism, described rock sample clamper, described rock sample to be measured and described resistivity measuring instrument are invaded in described testing liquid;
D) weighing mechanism and the conductivity measurement mechanism of described spontaneous imbibition measurement mechanism is opened, described weighing mechanism connects described rock sample clamper by an outstanding rope, described conductivity measurement mechanism connects a conductivity electrode, and one end of described conductivity electrode is stretched in described testing liquid;
E) record the data that described weighing mechanism, described conductivity measurement mechanism and described resistivity measuring instrument are measured, and analyze described data.
12. spontaneous imbibition experimental techniques as claimed in claim 11, is characterized in that, described step a) in, described rock sample to be measured is put into air blast dryer and dries, the bake out temperature of described air blast dryer is 60 degree.
13. spontaneous imbibition experimental techniques as claimed in claim 12, is characterized in that, described rock sample to be measured is dried 48 hours in described air blast dryer.
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