CN109827881A - Rock hydration degree characterizing method and system - Google Patents
Rock hydration degree characterizing method and system Download PDFInfo
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- CN109827881A CN109827881A CN201910140091.1A CN201910140091A CN109827881A CN 109827881 A CN109827881 A CN 109827881A CN 201910140091 A CN201910140091 A CN 201910140091A CN 109827881 A CN109827881 A CN 109827881A
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Abstract
The embodiment of the present application provides a kind of rock hydration degree characterizing method and system, pass through the initial fractal dimension being filled with before adsorbed gas obtains aquation to rock sample to be measured progress low temperature nitrogen adsorption experiment, and the initial gas data of the rock sample to be measured acquired according to analyzer in adsorption experiment chamber.Then immersion treatment is carried out to rock sample to be measured by impregnating chamber, and low temperature nitrogen adsorption experiment is carried out to the rock sample to be measured after immersion treatment, the fractal dimension of the pore structure after aquation is obtained further according to the adsorbed gas data that analyzer acquires.Finally, constructing hydration index using the initial fractal dimension before aquation and the fractal dimension after aquation.So, by the adsorbed gas data before and after rock sample hydration to be measured corresponding fractal dimension is calculated, fractal dimension before and after recycling hydration constructs the hydration index of rock sample to be measured, can rationally, the hydration degree of effectively quantitatively characterizing rock, analyzed for subsequent rock formation and reference be provided.
Description
Technical field
The present invention relates to Analysing Geological Data technical fields, characterize in particular to a kind of rock hydration degree
Method and system.
Background technique
Currently, Fissile Shale rock is the geology that Oil And Gas Exploration And Development gradually moves towards that Deep Oil And Gas Exploration resource bores chance
The geology preservation body of body and shale gas.The clay mineral of Fissile Shale mainly based on illite, containing it is a certain amount of she/
Deceive people layer, hydration swelling acts on the weaker and stratum and avalanche chip off-falling phenomenon often occurs, this is different from hydration swelling mud shale
Stratum, clay mineral is mainly based on montmorillonite, and hydration swelling effect is stronger.This illustrates Fissile Shale and hydration swelling
Property shale hydration mechanism has an apparent difference, i.e., the aquation Study on Problems application of result of existing hydration swelling mud shale in
There is certain limitation when explaining the aquation problem of Fissile Shale.
For rich organic matter Fissile Shale aquation correlative study, currently, the hydration degree of Fissile Shale rock
Lack reasonable characterizing method, the hydration degree difference between different Fissile Shale rocks also lacks Reasonable Parameters pair
Than.It is, therefore, desirable to provide a kind of quantitatively characterizing method of rock hydration degree.
Summary of the invention
In view of this, the purpose of the application is, a kind of rock hydration degree characterizing method and system are provided, with logical
The fractal dimension building hydration index for the pore structure that rock sample to be measured obtains after the adsorption experiment before and after aquation is crossed, thus
Rationally, hydration degree is effectively characterized.
The embodiment of the present application provides a kind of rock hydration degree characterizing method, is applied to rock hydration degree table
Sign system, the system comprises processing equipment and the adsorption experiment chamber, analyzer and the leachings that connect with the processing equipment
Steep chamber, which comprises
Adsorbed gas is filled in the adsorption experiment chamber to carry out the adsorption experiment of rock sample to be measured, wherein the absorption
Experiment is tested for the nitrogen adsorption carried out under the conditions of liquid nitrogen temperature；
The analyzer acquires initial adsorption gas data of the rock sample to be measured after adsorption experiment, and is sent to the processing
Equipment；
The processing equipment according to the initial adsorption gas data of acquisition be calculated rock sample to be measured pore structure just
Beginning fractal dimension；
Immersion treatment is carried out to the rock sample to be measured in the immersion chamber, and the rock sample to be measured after immersion treatment is sent into
The adsorption experiment chamber；
Adsorbed gas is filled in the adsorption experiment chamber again, adsorption experiment is carried out to the rock sample to be measured after immersion treatment；
Adsorbed gas data of the rock sample to be measured after adsorption experiment after the analyzer acquisition immersion treatment, and send
To the processing equipment；
The FRACTAL DIMENSION of the pore structure of rock sample to be measured is calculated according to the adsorbed gas data of acquisition for the processing equipment
It counts, and constructs the water of rock sample to be measured according to the fractal dimension after the initial fractal dimension and immersion treatment being calculated
Change action index.
Optionally, the pore structure of rock sample to be measured is calculated according to the adsorbed gas data of acquisition for the processing equipment
The step of fractal dimension, comprising:
Calculate the first natural logrithm of the adsorbed gas data obtained；
The balance pressure in adsorption experiment and the ratio between saturated vapor pressure pressure are obtained, and calculates the of the ratio
Two natural logrithms, then seek the Third Nature logarithm of the second nature logarithm；
Graph of relation is drawn according to first natural logrithm and the Third Nature logarithm；
The fractal dimension of the pore structure of rock sample to be measured is obtained according to the slope of the graph of relation.
Optionally, the graph of relation presses following public affairs according to first natural logrithm and the Third Nature logarithm
Formula draws to obtain:
Ln (V)=(D-3) ln (ln (Po/P))+C
Wherein, P is the balance pressure in adsorption experiment, and V is the adsorbed gas volume balanced under pressure P, P0It is steamed for saturation
Vapour pressure pressure, D are fractal dimension, and range 2-3, C are constant, and ln (V) is the first natural logrithm, ln (ln (P0/ P)) it is third
Natural logrithm.
Optionally, the hydration index of the rock sample to be measured is according to the initial fractal dimension being calculated and leaching
Fractal dimension after bubble processing, building obtains as follows:
Wherein, S is hydration index, D0For initial fractal dimension, DiFor the fractal dimension after i-th immersion treatment.
Optionally, the immersion treatment includes that repeatedly, each secondary immersion treatment continues different durations, and the method is also wrapped
It includes:
The processing equipment according to obtained hydration index after each secondary immersion treatment and corresponding immersion at
The duration of reason is fitted to obtain the functional relation between hydration index and the duration of immersion treatment.
The embodiment of the present application also provides a kind of rock hydration degree characterization system, the system comprises processing equipment with
And adsorption experiment chamber, analyzer and the immersion chamber being connect with the processing equipment；
The adsorption experiment chamber is used to carry out the adsorption experiment of rock sample to be measured after being filled with adsorbed gas, wherein the suction
Attached experiment is tested for the nitrogen adsorption carried out under the conditions of liquid nitrogen temperature；
The analyzer is sent to described for acquiring initial adsorption gas data of the rock sample to be measured after adsorption experiment
Processing equipment；
The processing equipment is used to be calculated the pore structure of rock sample to be measured according to the initial adsorption gas data of acquisition
Initial fractal dimension；
The immersion chamber is used to carry out immersion treatment to the rock sample to be measured, and the rock sample to be measured after immersion treatment is sent
Enter the adsorption experiment chamber；
The adsorption experiment chamber adsorbs the rock sample to be measured after immersion treatment after being also used to be filled with adsorbed gas again
Experiment；
The analyzer is also used to acquire adsorbed gas data of the rock sample to be measured after immersion treatment after adsorption experiment,
And it is sent to the processing equipment；
The processing equipment is also used to be calculated the pore structure of rock sample to be measured according to the adsorbed gas data of acquisition
Fractal dimension, and rock to be measured is constructed according to the fractal dimension after the initial fractal dimension and immersion treatment being calculated
The hydration index of sample.
Optionally, the fractal dimension of the pore structure of rock sample to be measured is calculated in the processing equipment in the following manner:
Calculate the first natural logrithm of the adsorbed gas data obtained；
The balance pressure in adsorption experiment and the ratio between saturated vapor pressure pressure are obtained, and calculates the of the ratio
Two natural logrithms, then seek the Third Nature logarithm of the second nature logarithm；
Graph of relation is drawn according to first natural logrithm and the Third Nature logarithm；
The fractal dimension of the pore structure of rock sample to be measured is obtained according to the slope of the graph of relation.
Optionally, the processing equipment is used for according to first natural logrithm and the Third Nature logarithm by following
Formula is drawn to obtain graph of relation:
Ln (V)=(D-3) ln (ln (Po/P))+C
Wherein, P is the balance pressure in adsorption experiment, and V is the adsorbed gas volume balanced under pressure P, P0It is steamed for saturation
Vapour pressure pressure, D are fractal dimension, and range 2-3, C are constant, and ln (V) is the first natural logrithm, ln (ln (P0/ P)) it is third
Natural logrithm.
Optionally, the processing equipment is used for according to after the initial fractal dimension and immersion treatment being calculated
Fractal dimension, as follows building obtain the hydration index of rock sample to be measured:
Wherein, S is hydration index, D0For initial fractal dimension, DiFor the fractal dimension after i-th immersion treatment.
Optionally, the immersion treatment includes that repeatedly, each secondary immersion treatment continues different durations:
The processing equipment is also used to according to hydration index obtained after each secondary immersion treatment and corresponding
The duration of immersion treatment is fitted to obtain the functional relation between hydration index and the duration of immersion treatment.
Rock hydration degree characterizing method provided by the embodiments of the present application and system, by being filled in adsorption experiment chamber
Enter adsorbed gas and low temperature nitrogen adsorption experiment is carried out to rock sample to be measured, and according to the rock sample to be measured of analyzer acquisition after adsorption experiment
Initial gas data aquation is calculated before rock sample to be measured initial fractal dimension.Then by impregnating chamber to rock to be measured
Sample carries out immersion treatment, and carries out low temperature nitrogen adsorption experiment to the rock sample to be measured after immersion treatment, further according to point of acquisition
The FRACTAL DIMENSION of pore structure of the rock sample to be measured after aquation is calculated in the adsorbed gas data of the rock sample to be measured of analyzer acquisition
Number.Finally, constructing the hydration of rock sample to be measured using the initial fractal dimension before aquation and the fractal dimension after aquation
Index.In this way, by obtaining the adsorbed gas data after the adsorption experiment before and after rock sample hydration to be measured to be calculated pair
The fractal dimension answered recycles the fractal dimension before and after hydration to construct the hydration index of rock sample to be measured, can rationally, have
The hydration degree of effect ground quantitatively characterizing rock provides reference for the analysis of subsequent rock formation.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural block diagram that rock hydration degree provided by the embodiments of the present application characterizes system.
Fig. 2 is the flow chart of rock hydration degree characterizing method provided by the embodiments of the present application.
Fig. 3 is the flow chart of the sub-step of step 270 in Fig. 2.
Fig. 4 is the schematic diagram of graph of relation provided by the embodiments of the present application.
Fig. 5 is the schematic diagram of the relationship between immersion duration provided by the embodiments of the present application and fractal dimension.
The schematic diagram of relationship of the Fig. 6 between hydration index provided by the embodiments of the present application and soaking time.
Fig. 7 is hydration index provided by the embodiments of the present application and the schematic diagram for accumulating the relationship between soaking time.
Icon: 110- processing equipment；120- adsorption experiment chamber；130- analyzer；140- impregnates chamber；150- drying dress
It sets.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Referring to Fig. 1, the embodiment of the present application provides a kind of rock hydration degree characterization system, the system comprises places
It manages equipment 110, adsorption experiment chamber 120, analyzer 130, impregnate chamber 140 and drying unit 150, wherein the absorption
Laboratory 120, analyzer 130, immersion chamber 140 and drying unit 150 can be connect with the processing equipment 110 respectively.It can
Wired connection is carried out by data line, can also be wirelessly connected by communication module, specifically with no restriction.
In the present embodiment, individually adsorption experiment chamber 120, immersion chamber 140 and drying unit 150 can be operated,
To control adsorption experiment chamber 120, impregnate chamber 140 and the progress corresponding actions of drying unit 150, it can also uniformly pass through processing
Equipment 110 controls adsorption experiment chamber 120, immersion chamber 140 and drying unit 150 etc., so that corresponding equipment carries out
Corresponding operating, specifically in the present embodiment with no restriction.
Optionally, the concrete type of the processing equipment 110 is unrestricted, for example, it may be, but be not limited to, personal electricity
Brain (personal computer, PC), tablet computer, personal digital assistant (personal digital assistant,
PDA), mobile internet surfing equipment (mobile Internet device, MID), web (website) server, data server etc. have
There is the equipment of processing function.
In conjunction with Fig. 2, the embodiment of the present invention also provides a kind of aquation that can be applied to above-mentioned hydration degree analyzing system
Effect degree analysis method.Wherein, method and step defined in the related process of the method can be by each in the system
A equipment is realized.Detailed process shown in Fig. 2 will be described in detail below.
Step 210, it is filled with adsorbed gas in the adsorption experiment chamber 120 to carry out the adsorption experiment of rock sample to be measured,
In, the adsorption experiment is the nitrogen adsorption experiment carried out under the conditions of liquid nitrogen temperature.
Step 220, the analyzer 130 acquires initial adsorption gas data of the rock sample to be measured after adsorption experiment, concurrently
It send to the processing equipment 110.
Step 230, the hole of rock sample to be measured is calculated according to the initial adsorption gas data of acquisition for the processing equipment 110
The initial fractal dimension of gap structure.
In the present embodiment, it can be realized by the processing equipment 110 to the adsorption experiment chamber 120, analyzer
130, the control of chamber 140 and drying unit 150 is impregnated.Also, the processing equipment 110 also can get 130 institute of analyzer
Collected data, and data are analyzed and processed.
When it is implemented, the Rock in Well sample of the Fissile Shale interval in research work area can be acquired, and press associated row
Industry standard to collected rock sample carry out sample preparation, the particulate samples of such as 5g of 6-10 mesh or so are made, using as to
Survey rock sample.
Before formally being handled, drying unit 150 can carry out drying and processing or processing equipment to rock sample to be measured
110 can control the drying and processing that the drying unit 150 carries out preset duration with preset temperature to rock sample to be measured first.Wherein,
The preset temperature can be 60 DEG C, and the preset duration can be 24 hours, specifically with no restriction.In the present embodiment, institute
Stating processing equipment 110 can connect with the processing module in drying unit 150, and processing equipment 110 passes through into drying unit 150
Processing module sends control instruction, so that controlling drying unit 150 carries out corresponding operating.
Further, the processing equipment 110 can control the adsorption experiment chamber 120 to carry out vacuumize process, equally
Ground, processing equipment 110 can be connect with the processing module of adsorption experiment chamber 120, and processing equipment 110 is by adsorption experiment chamber
120 send corresponding control instruction, so that adsorption experiment chamber 120 be made to carry out respective operations, such as vacuumize outside either access
Portion's equipment is to be filled with gas etc..
After the vacuumize process for completing adsorption experiment chamber 120, and rock sample to be measured is being sent into adsorption experiment chamber
Behind room 120, processing equipment 110 can control adsorption experiment chamber 120 with the charger outside access, to control real to absorption
It tests in chamber 120 and is filled with adsorbed gas, wherein the adsorbed gas can be nitrogen.So that be measured in adsorption experiment chamber 120
Rock sample carries out adsorption experiment.Adsorption experiment is nitrogen adsorption experiment under the conditions of liquid nitrogen temperature.
Controllable adsorption experiment continues certain time length, such as 2 hours or 3 hours etc. unlimited.After adsorption experiment terminates,
Analyzer 130 can be opened to be detected or processing equipment 110 can control the analyzer 130 to open, to adsorption experiment
Rock sample to be measured later carries out adsorbed gas measurement.Wherein, the analyzer 130 is surface area and pore analysis instrument, this implementation
In example, the analyzer 130 of model NOVA2000e can be used.
Adsorbed gas data are sent to by the analyzer 130 after collecting the adsorbed gas data of rock sample to be measured
Processing equipment 110.In the present embodiment, for the ease of distinguishing, rock sample to be measured is carried out to the adsorbed gas numerical nomenclature before aquation
For initial adsorption gas data.Processing equipment 110, can root after the initial adsorption gas data for receiving the acquisition of analyzer 130
The initial fractal dimension of the pore structure of rock sample to be measured is calculated according to the initial adsorption gas data received.Wherein, this is first
Beginning fractal dimension is fractal dimension of the rock sample to be measured before carrying out hydration.
Step 240, immersion treatment is carried out to the rock sample to be measured in the immersion chamber 140, and will be after immersion treatment
Rock sample to be measured is sent into the adsorption experiment chamber 120.
Step 250, be filled in the adsorption experiment chamber 120 again adsorbed gas to the rock sample to be measured after immersion treatment into
Row adsorption experiment.
Step 260, adsorbed gas of the rock sample to be measured after the acquisition of analyzer 130 immersion treatment after adsorption experiment
Data, and it is sent to the processing equipment 110.
Step 270, the hole knot of rock sample to be measured is calculated according to the adsorbed gas data of acquisition for the processing equipment 110
The fractal dimension of structure, and according to after the initial fractal dimension and immersion treatment being calculated fractal dimension building to
Survey the hydration index of rock sample.
After the initial fractal dimension before obtaining rock sample to be measured and carrying out hydration, rock sample to be measured can be put into immersion
In chamber 140.The immersion chamber 140 can start to carry out hydration process or the processing equipment 110 and can control the leaching
Chamber 140 is steeped to carry out immersion treatment to rock sample to be measured, wherein processing equipment 110 can be with the processing module in immersion chamber 140
Connection, by sending control instruction to the processing module for impregnating chamber 140, to make to impregnate the progress corresponding operating of chamber 140.Example
It such as controls and impregnates the starting of chamber 140, the immersion liquid impregnated in the fluid box in chamber 140 will be pre-charged with and be delivered to placement
At the position of rock sample to be measured, to realize the immersion treatment to rock sample to be measured.
Wherein, be pre-charged with impregnate immersion liquid in chamber 140 can for deionized water or various inorganic salt solutions, such as
NaCl、KCl、CaCl2Deng, or it is also possible to various hydrate inhibiter solution.When carrying out immersion treatment to rock sample to be measured, place
Managing the controllable temperature impregnated in chamber 140 of equipment 110 is room temperature either high temperature, also can control and impregnates in chamber 140
Pressure is low pressure or high pressure, and specifically soaking conditions can be set as the case may be.
The controllable immersion treatment impregnated chamber 140 and carry out preset time to rock sample to be measured of processing equipment 110, when this is default
Between can for 1 day, 3 days, 5 days etc. it is unlimited.After completing immersion treatment, rock sample to be measured can be subjected to drying and processing, such as can be
24 hours drying and processings are carried out at 60 DEG C.After waiting rock sample natural cooling to be measured, rock sample to be measured is sent into the absorption
In laboratory 120.For example, processing equipment 110 can be by the mechanical arm outside control to grab rock sample to be measured, and by rock to be measured
Sample is sent into adsorption experiment chamber 120, and specifically form is in the present embodiment with no restriction.
Similarly, processing equipment 110 can control adsorption experiment chamber 120 in a manner described and be filled with adsorbed gas, to absorption
Rock sample to be measured in laboratory 120 carries out adsorption experiment.Likewise, the adsorption experiment carries out under the conditions of liquid nitrogen temperature
Nitrogen adsorption experiment.After adsorption experiment terminates, analyzer 130 can control to open, to acquire rock sample to be measured in immersion treatment
Later, and the adsorbed gas data after carrying out adsorption experiment.The analyzer 130 sends out collected adsorbed gas data
It send to processing equipment 110.
Processing equipment 110 can be calculated rock sample to be measured according to the adsorbed gas data of the rock sample to be measured received and carry out
Fractal dimension after hydration.Specifically, referring to Fig. 3, can be realized by following steps:
Step 310, the first natural logrithm of the adsorbed gas data of acquisition is calculated.
Step 320, the balance pressure in adsorption experiment and the ratio between saturated vapor pressure pressure are obtained, and described in calculating
The second nature logarithm of ratio, then seek the Third Nature logarithm of the second nature logarithm.
Step 330, graph of relation is drawn according to first natural logrithm and the Third Nature logarithm.
Step 340, the fractal dimension of the pore structure of rock sample to be measured is obtained according to the slope of the graph of relation.
In the present embodiment, the first natural logrithm of the adsorbed gas data obtained can be sought, i.e., using e as the adsorbed gas at bottom
The logarithm of data.And the balance pressure in adsorption experiment and preset saturated vapor pressure pressure are obtained, then calculate the two
Between ratio.The second nature logarithm for the ratio being calculated is sought, i.e., using e as the logarithm of the ratio at bottom.Further,
The Third Nature logarithm of the second nature logarithm is calculated, i.e., using e as the logarithm of the second nature logarithm at bottom.
Further, graph of relation is drawn according to the first natural logrithm and Third Nature logarithm being calculated, specifically
Ground can draw according to the following formula graph of relation:
Ln (V)=(D-3) ln (ln (Po/P))+C
Wherein, P is the balance pressure in adsorption experiment, and V is the adsorbed gas volume balanced under pressure P, P0It is steamed for saturation
Vapour pressure pressure, D are fractal dimension, and range 2-3, C are constant, and ln (V) is the first natural logrithm, ln (ln (P0/ P)) it is third
Natural logrithm.
Fig. 4 schematically shows the graph of relation drawn according to the first natural logrithm and Third Nature logarithm.It is logical
The slope for crossing the graph of relation that drafting obtains can be obtained point of pore structure of the rock sample to be measured after carrying out hydration
Shape dimension D.
It is above-mentioned that the immersion treatment of rock sample to be measured, drying and processing, adsorption experiment and adsorbed gas are surveyed in the present embodiment
Amount detection may be repeated repeatedly, and each immersion treatment can set different immersion durations, and obtain finally obtained every time
Adsorbed gas data.In this way, by the above-mentioned means, pore structure of the rock sample to be measured after different immersion durations can be obtained
Fractal dimension Di, wherein i indicates i-th immersion treatment.
After Fig. 5 diagrammatically illustrates different immersion duration processing, point of the pore structure for the rock sample to be measured being calculated
Shape dimension.Wherein, fractal dimension is bigger, shows that rock pore structure is more complicated, and fractal dimension reduces, rock pore structure
Complexity gradually decreases.As seen from Figure 5, with the increase of soaking time, rock pore structure complexity is gradually decreased, i.e.,
Complicated Pore Structures in rock reduce.Illustrate that rock pore structure gradually becomes simple from complexity.Rock sample after immersion
Macroscopic result illustrates that rock surface goes out some cracks, also illustrates that the fractal dimension of rock pore structure will reduce.
It should be appreciated that before hydration, the calculation and hydration of the initial fractal dimension of rock sample to be measured it
The calculation of the fractal dimension of rock sample to be measured is similar afterwards, and details are not described herein.
In the present embodiment, for the hydration degree of quantitatively characterizing rock sample to be measured, propose with hydration index come
Characterize the hydration degree of rock.It can be according to point shape after the initial fractal dimension and immersion treatment being calculated
Dimension constructs the hydration index of rock sample to be measured, specifically, can construct to obtain the hydration of rock sample to be measured as follows
Index:
Wherein, S is hydration index, D0For initial fractal dimension, DiFor the fractal dimension after i-th immersion treatment.
Wherein, hydration index is bigger, illustrates that rock hydration degree is stronger, and hydration index is smaller, says
Bright rock hydration degree is weaker.Hydration reaction occurs after contacting with water for rock, generates aquation damage, causes rock
Pore structure changes, when Fig. 6 and Fig. 7 schematically show rock hydration index with soaking time or accumulation immersion
Between situation of change.It can be seen from the figure that with the increase of soaking time or accumulation soaking time, rock hydration index
Increase, rock pore structure changes greatly, and rock hydration degree increases.Processing equipment 110 can according to each secondary immersion treatment it
Hydration index afterwards is fitted to obtain between hydration index and the duration of immersion treatment with the duration of corresponding immersion treatment
Functional relation.It can be fitted to obtain rock aquation work according to the data of hydration index and accumulation soaking time in Fig. 7
With index and the functional relation between soaking time is accumulated, such as such as following formula:
S=0.0157t-0.0017
Wherein, t indicates accumulation soaking time, can be to the rock aquation of accumulation soaking time by above-mentioned functional relation
Effect degree carries out quantitative forecast.
By above procedure, aquation work can be obtained by processes such as adsorption experiment, immersion treatment and adsorbed gas detections
With the data of front and back rock sample to be measured adsorbed adsorbed gas in adsorption experiment, and pass through the adsorbed gas before and after hydration
Volume data is calculated corresponding fractal dimension, and the fractal dimension before and after hydration is recycled to construct to obtain hydration and refer to
Number, to realize reasonable, the effective quantitative description to the hydration degree of rock.Help to analyze rock formation and provide
Reference.Fissile Shale rock hydration degree power has a major impact stratum wellbore stability, meanwhile, to shale gas
When layer reservoir carries out pressure break, the stewing well time is longer, and rock hydration degree increases, and rock pore structure changes greatly, makes
Increase (fractal dimension reduction) at crack in shale gas-bearing formation reservoir, is conducive to shale gas-bearing formation reservoir seam net and is formed.
The embodiment of the present application also provides a kind of rock hydration degree characterization system, wherein the system comprises processing
Equipment 110 and the adsorption experiment chamber 120 being connect with the processing equipment 110, analyzer 130 and immersion chamber 140.
The adsorption experiment chamber 120 is used to carry out the adsorption experiment of rock sample to be measured after being filled with adsorbed gas, wherein
The adsorption experiment is the nitrogen adsorption experiment carried out under the conditions of liquid nitrogen temperature；
The analyzer 130 is sent to for acquiring initial adsorption gas data of the rock sample to be measured after adsorption experiment
The processing equipment 110；
The processing equipment 110 is used to be calculated the hole knot of rock sample to be measured according to the initial adsorption gas data of acquisition
The initial fractal dimension of structure；
The immersion chamber 140 is used to carry out the rock sample to be measured immersion treatment, and by the rock to be measured after immersion treatment
Sample is sent into the adsorption experiment chamber 120；
The adsorption experiment chamber 120 inhales the rock sample to be measured after immersion treatment after being also used to be filled with adsorbed gas again
Attached experiment；
The analyzer 130 is also used to acquire adsorbed gas number of the rock sample to be measured after immersion treatment after adsorption experiment
According to, and it is sent to the processing equipment 110；
The processing equipment 110 is also used to be calculated the pore structure of rock sample to be measured according to the adsorbed gas data of acquisition
Fractal dimension, and according to after the initial fractal dimension and immersion treatment being calculated fractal dimension building it is to be measured
The hydration index of rock sample.
Optionally, in the present embodiment, rock sample to be measured can be calculated in the processing equipment 110 in the following manner
The fractal dimension of pore structure:
Calculate the first natural logrithm of the adsorbed gas data obtained；
The balance pressure in adsorption experiment and the ratio between saturated vapor pressure pressure are obtained, and calculates the of the ratio
Two natural logrithms, then seek the Third Nature logarithm of the second nature logarithm；
Graph of relation is drawn according to first natural logrithm and the Third Nature logarithm；
The fractal dimension of the pore structure of rock sample to be measured is obtained according to the slope of the graph of relation.
Further, the processing equipment 110 can be used for according to first natural logrithm and the Third Nature
Logarithm is drawn obtain graph of relation as follows:
Ln (V)=(D-3) ln (ln (Po/P))+C
Wherein, P is the balance pressure in adsorption experiment, and V is the adsorbed gas volume balanced under pressure P, P0It is steamed for saturation
Vapour pressure pressure, D are fractal dimension, and range 2-3, C are constant, and ln (V) is the first natural logrithm, ln (ln (P0/ P)) it is third
Natural logrithm.
Optionally, in the present embodiment, the processing equipment 110 can be used for according to the initial point shape being calculated
Fractal dimension after dimension and immersion treatment, building obtains the hydration index of rock sample to be measured as follows:
Wherein, S is hydration index, D0For initial fractal dimension, DiFor the fractal dimension after i-th immersion treatment.
Further, in the present embodiment, the immersion treatment includes repeatedly, when each secondary immersion treatment continues different
It is long.
The processing equipment 110 can be also used for according to hydration index obtained after each secondary immersion treatment and
The duration of corresponding immersion treatment is fitted to obtain the functional relation between hydration index and the duration of immersion treatment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, no longer can excessively be repeated herein with reference to the corresponding process in preceding method.
In conclusion rock hydration degree characterizing method provided by the embodiments of the present application and system, by adsorbing
Laboratory 120 is filled with adsorbed gas and carries out low temperature nitrogen adsorption experiment to rock sample to be measured, and according to the to be measured of the acquisition of analyzer 130
The initial fractal dimension of initial gas data of the rock sample after adsorption experiment rock sample to be measured before aquation is calculated.Then pass through
It impregnates chamber 140 and immersion treatment is carried out to rock sample to be measured, and low temperature nitrogen absorption is carried out to the rock sample to be measured after immersion treatment
Rock sample to be measured is calculated in aquation further according to the adsorbed gas data for the rock sample to be measured that the analyzer 130 of acquisition acquires in experiment
The fractal dimension of pore structure later.Finally, utilizing the initial fractal dimension before aquation and the fractal dimension after aquation
Construct the hydration index of rock sample to be measured.In this way, passing through the suction after the adsorption experiment before and after acquisition rock sample hydration to be measured
Attached gas data recycles the fractal dimension before and after hydration to construct rock sample to be measured so that corresponding fractal dimension is calculated
Hydration index, can rationally, the hydration degree of effectively quantitatively characterizing rock, analyzed for subsequent rock formation and ginseng be provided
Examine data.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the flow chart and block diagram in attached drawing are shown
Architectural framework in the cards, function and the behaviour of devices in accordance with embodiments of the present invention, method and computer program product
Make.In this regard, each box in flowchart or block diagram can represent a part of a module, section or code, institute
The a part for stating module, section or code includes one or more executable instructions for implementing the specified logical function.
It should also be noted that function marked in the box can also be to be different from attached drawing in some implementations as replacement
The sequence marked occurs.For example, two continuous boxes can actually be basically executed in parallel, they sometimes can also be by
Opposite sequence executes, and this depends on the function involved.It is also noted that each box in block diagram and or flow chart,
And the combination of the box in block diagram and or flow chart, hardware can be based on the defined function of execution or the dedicated of movement
System realize, or can realize using a combination of dedicated hardware and computer instructions.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of rock hydration degree characterizing method, which is characterized in that it is applied to rock hydration degree and characterizes system,
The system comprises processing equipment and the adsorption experiment chamber connecting with the processing equipment, analyzer and chamber is impregnated,
The described method includes:
Adsorbed gas is filled in the adsorption experiment chamber to carry out the adsorption experiment of rock sample to be measured, wherein the adsorption experiment
For the nitrogen adsorption experiment carried out under the conditions of liquid nitrogen temperature；
The analyzer acquires initial adsorption gas data of the rock sample to be measured after adsorption experiment, and is sent to the processing and sets
It is standby；
Initial point of the pore structure of rock sample to be measured is calculated according to the initial adsorption gas data of acquisition for the processing equipment
Shape dimension；
Immersion treatment is carried out to the rock sample to be measured in the immersion chamber, and will be described in the rock sample to be measured feeding after immersion treatment
Adsorption experiment chamber；
Adsorbed gas is filled in the adsorption experiment chamber again, adsorption experiment is carried out to the rock sample to be measured after immersion treatment；
Adsorbed gas data of the rock sample to be measured after adsorption experiment after the analyzer acquisition immersion treatment, and it is sent to institute
State processing equipment；
The fractal dimension of the pore structure of rock sample to be measured is calculated according to the adsorbed gas data of acquisition for the processing equipment, and
Made according to the aquation that the fractal dimension after the initial fractal dimension and immersion treatment being calculated constructs rock sample to be measured
Use index.
2. rock hydration degree characterizing method according to claim 1, which is characterized in that the processing equipment according to
The step of fractal dimension of the pore structure of rock sample to be measured is calculated in the adsorbed gas data of acquisition, comprising:
Calculate the first natural logrithm of the adsorbed gas data obtained；
Obtain adsorption experiment in balance pressure and saturated vapor pressure pressure between ratio, and calculate the ratio second oneself
Right logarithm, then seek the Third Nature logarithm of the second nature logarithm；
Graph of relation is drawn according to first natural logrithm and the Third Nature logarithm；
The fractal dimension of the pore structure of rock sample to be measured is obtained according to the slope of the graph of relation.
3. rock hydration degree characterizing method according to claim 2, which is characterized in that the graph of relation root
It draws obtain as follows according to first natural logrithm and the Third Nature logarithm:
Ln (V)=(D-3) ln (ln (Po/P))+C
Wherein, P is the balance pressure in adsorption experiment, and V is the adsorbed gas volume balanced under pressure P, P0For saturated vapor pressure pressure
Power, D are fractal dimension, and range 2-3, C are constant, and ln (V) is the first natural logrithm, ln (ln (P0/ P)) it is Third Nature pair
Number.
4. rock hydration degree characterizing method according to claim 1, which is characterized in that the water of the rock sample to be measured
Change action index according to the fractal dimension after the initial fractal dimension and immersion treatment being calculated, as follows
Building obtains:
Wherein, S is hydration index, D0For initial fractal dimension, DiFor the fractal dimension after i-th immersion treatment.
5. rock hydration degree characterizing method according to claim 1, which is characterized in that the immersion treatment includes
Repeatedly, each secondary immersion treatment continues different durations, the method also includes:
The processing equipment is according to obtained hydration index after each secondary immersion treatment and corresponding immersion treatment
Duration is fitted to obtain the functional relation between hydration index and the duration of immersion treatment.
6. a kind of rock hydration degree characterizes system, which is characterized in that the system comprises processing equipment and with it is described
Adsorption experiment chamber, analyzer and the immersion chamber of processing equipment connection；
The adsorption experiment chamber is used to carry out the adsorption experiment of rock sample to be measured after being filled with adsorbed gas, wherein the absorption is real
Test the nitrogen adsorption experiment to carry out under the conditions of liquid nitrogen temperature；
The analyzer is sent to the processing for acquiring initial adsorption gas data of the rock sample to be measured after adsorption experiment
Equipment；
The processing equipment is used to be calculated the first of the pore structure of rock sample to be measured according to the initial adsorption gas data of acquisition
Beginning fractal dimension；
The immersion chamber is used to carry out immersion treatment to the rock sample to be measured, and the rock sample to be measured after immersion treatment is sent into institute
State adsorption experiment chamber；
The adsorption experiment chamber carries out adsorption experiment to the rock sample to be measured after immersion treatment after being also used to be filled with adsorbed gas again；
The analyzer is also used to acquire adsorbed gas data of the rock sample to be measured after immersion treatment after adsorption experiment, concurrently
It send to the processing equipment；
The processing equipment is also used to be calculated point shape of the pore structure of rock sample to be measured according to the adsorbed gas data of acquisition
Dimension, and rock sample to be measured is constructed according to the fractal dimension after the initial fractal dimension and immersion treatment being calculated
Hydration index.
7. rock hydration degree according to claim 6 characterizes system, which is characterized in that the processing equipment passes through
The fractal dimension of the pore structure of rock sample to be measured is calculated in following manner:
Calculate the first natural logrithm of the adsorbed gas data obtained；
Obtain adsorption experiment in balance pressure and saturated vapor pressure pressure between ratio, and calculate the ratio second oneself
Right logarithm, then seek the Third Nature logarithm of the second nature logarithm；
Graph of relation is drawn according to first natural logrithm and the Third Nature logarithm；
The fractal dimension of the pore structure of rock sample to be measured is obtained according to the slope of the graph of relation.
8. rock hydration degree according to claim 7 characterizes system, which is characterized in that the processing equipment is used for
It draws obtain graph of relation as follows according to first natural logrithm and the Third Nature logarithm:
Ln (V)=(D-3) ln (ln (Po/P))+C
Wherein, P is the balance pressure in adsorption experiment, and V is the adsorbed gas volume balanced under pressure P, P0For saturated vapor pressure pressure
Power, D are fractal dimension, and range 2-3, C are constant, and ln (V) is the first natural logrithm, ln (ln (P0/ P)) it is Third Nature pair
Number.
9. rock hydration degree according to claim 6 characterizes system, which is characterized in that the processing equipment is used for
According to the fractal dimension after the initial fractal dimension and immersion treatment being calculated, as follows building obtain to
Survey the hydration index of rock sample:
Wherein, S is hydration index, D0For initial fractal dimension, DiFor the fractal dimension after i-th immersion treatment.
10. rock hydration degree according to claim 6 characterizes system, which is characterized in that the immersion treatment packet
It includes repeatedly, each secondary immersion treatment continues different durations:
The processing equipment is also used to according to hydration index obtained after each secondary immersion treatment and corresponding immersion
The duration of processing is fitted to obtain the functional relation between hydration index and the duration of immersion treatment.
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