CN102900423A - Gel-based solid physical simulator for electrical logging detector and forming method of gel-based solid physical simulator - Google Patents
Gel-based solid physical simulator for electrical logging detector and forming method of gel-based solid physical simulator Download PDFInfo
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Abstract
The embodiment of the invention provides a gel-based solid physical simulator for an electrical logging detector and a forming method of the gel-based solid physical simulator. The gel-based solid physical simulator comprises a lower surrounding rock bed, a target stratum and an upper surrounding rock bed which are arranged sequentially from bottom to top and a wellhole which penetrates through the lower surrounding rock bed, the target stratum and the upper surrounding rock bed vertically, wherein the target stratum comprises a target stratum undisturbed formation and a target stratum invaded zone which are arranged sequentially from outside to inside; and the wellhole penetrates through the target stratum invaded zone vertically. According to the solid physical simulator, hydrophilic macromolecular elastic gel is used as a critical material for simulating formation modules; and the solid physical simulator can be used for performing physical simulation on the full-size electrical logging detector, and can also be used for detecting the logging response characteristics including longitudinal and radial detection characteristics, measuring accuracy and longitudinal resolution of the detector.
Description
Technical field
The invention belongs to oil electrical log equipment research and development field, be specifically related to a kind of can to full-scale electric logging probe carry out bad ground log response test, based on entity physical simulating device of gel and forming method thereof, the theory that is used for checking electric logging probe is derived and the numerical simulation calculation result.
Background technology
The probe physical simulating device is as equipment special, be used for the full-scale probe of 1:1 is carried out log response characteristic (vertically, radial investigation characteristics, certainty of measurement, longitudinal frame etc.) physical analogy, be the key checking link to the numerical simulation algorithm in the probe designs and probe preparation method and technique, and provide reliable foundation for the probe optimal design.Physical analogy process (being also referred to as the logging method experiment) is indispensable important step in the research and development of the especially high-end imaging electric logging of electric logging probe probe.
As follows to the main method of carrying out physical analogy and experiment in the research of electric logging probe and the production at present.
1, conductive rubber method
Making up electric logging probe entity physical simulating device with conductive rubber is a kind of traditional method, the drawback of this method is because the non-hydrophily of rubber causes conducting medium often to adopt metal or non-metallic particle, cause on electrical conduction mechanism different with the ionic conduction of petroleum reservoir, coupling difficulty between different electric module, the sulfidization molding of large volume is very difficult, lack of homogeneity, cost is higher and aging etc. easily; Therefore be not widely used, especially not high-end imaging electric logger in recent years (as array induction, three-component induction and array side to etc.) physical analogy in be applied.
2, large volume pond method
(exceed the logger effective scope of detection with certain volume, general radius is greater than 5 meters) the pond fill the water of certain salinity, because the ionic conduction effect can be simulated certain the electrical conductivity environment under the Infinite medium, can be used for validation instrument the K value (the instrument coefficient, be used for finishing resistance and resistivity or electric lead and electrical conductivity between conversion); But this simple volume-based model device has determined can't examine or check fully the vertical and radial investigation characteristics of instrument, and is therefore invalid for probe property verification and optimization in the imaging electric logger research and development of current main flow.
3, conducting ring method
Adopting string that impedor metallic conduction ring is arranged is the conventional method of traditional induction type logger inspection and scale, and this method does not belong to the entity physical analogy.Owing to be to adopt lumped parameter simulation actual formation distributed constant to the contribution of receiving coil, therefore the method can not be used for the vertical and radial investigation characteristics of examination instrument, invalid for probe property verification and optimization in the imaging electric logger research and development of current main flow, and the method is unsuitable for the electric pole type electric logger.
4, experiment well method
Experiment well generally refers to certain depth, certain pressure and temperature environment can be provided, the stratum (even part has been descended sleeve pipe) of typical lithology is arranged in the well, can test to the work of instrument the non-producing well of detection; Experiment well is effectively for the investigation of the contrast between the instrument of difference and identical producer, type, model and stability of instrument, therefore is the probe important technical links in research and development later stage; But it is unknown that the actual parameter on stratum in the experiment well (accurate geometry model and the electrical parameter of target zone, country rock) is actually, and therefore can not verify how much detection features of electric logging especially electric imaging logging probe; Another limitation was that in fact the probe of testing must be complete instrument during the experiment well method was used, its detector subsystem (electrode system, coil array) must be according to certain whole moulding of heat resisting and pressure resisting standard with Electronic Control, signal amplification, data acquisition and transmission system etc., this is actually unpractical for the preliminary stage that needs many different schemes to be compared checking in original innovation research.
In a word, at present can make up applicable electric logging probe entity physical simulating device without any a kind of method, this causes for a long time, the electric logging probe of employing method for numerical simulation (owing to will many complicated factors being simplified in a large number and idealize in the research) design can't be verified and be optimized effectively, has limited the lifting of design level in the research and development.Purpose of the present invention namely is the important technology bottleneck that solves in these high-end electric logging probe research and development.
Summary of the invention
The objective of the invention is, a kind of electric logging probe entity physical simulating device based on gel and forming method thereof is provided, to solve the physical analogy difficult problem of electric logging probe under the bad ground environment.
For reaching above-mentioned purpose, on the one hand, the embodiment of the invention provides a kind of formation method of the electric logging probe entity physical simulating device based on gel, and described method comprises:
Form the carrying container of entity physical simulating device;
Form the pit shaft container, described pit shaft container is arranged at the central authorities of described carrying container;
The gel that configuration has the required resistivity of lower country rock, and will be described have the required resistivity of lower country rock gel-filled between described carrying container and the described pit shaft container, reach lower country rock gauge, casing under the formation after solidifying fully;
Formation has the invaded zone container of hollow via-hole, is arranged at described invaded zone container in the described carrying container and is positioned on the described lower casing, in described invaded zone container is located at described pit shaft container set by described hollow via-hole;
The gel that configuration has the required resistivity of target zone undisturbed formation, and with described have the required resistivity of target zone undisturbed formation gel-filled between described carrying container and the described invaded zone container, layer thickness size, fully formation target zone undisturbed formation after the curing achieve the goal;
The gel that configuration has the required resistivity in invaded zone, and with described have the required resistivity in invaded zone gel-filled in the container of described invaded zone, a layer invaded zone gauge achieves the goal, form the target zone invaded zone after solidifying fully, described target zone undisturbed formation and described target zone invaded zone consist of target zone;
The gel that configuration has the required resistivity of upper country rock, and with described have the required resistivity of upper country rock gel-filled between described carrying container and the described pit shaft container and on the described target zone, reach the country rock gauge, form upper casing after solidifying fully.
For reaching above-mentioned purpose, on the other hand, the embodiment of the invention provides a kind of electric logging probe entity physical simulating device based on gel, and described device comprises:
The lower casing that sets gradually from the bottom to top, target zone and upper casing, and the wellhole that vertically runs through described lower casing, described target zone and described upper casing;
Described target zone comprises target zone undisturbed formation and the target zone invaded zone that sets gradually from outside to inside; Wherein, described wellhole vertically runs through described target zone invaded zone.
The beneficial effect of the technique scheme that the embodiment of the invention provides is:
The method and device can be simulated variously layer size and conductive characteristic easily.Entity physical simulating device of the present invention, adopt the hydrophilic macromolecule elastic gel as the key material of simulated formation module, this device can be used in the physical analogy to full-scale electric logging probe, can be used for checking and comprise vertical, radial investigation characteristics, certainty of measurement, longitudinal frame is in interior probe log response characteristic.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural profile schematic diagram of the electric logging probe physical simulating device of the embodiment of the invention;
Fig. 2 is the formation method flow diagram of the electric logging probe physical simulating device of the embodiment of the invention.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention provides a kind of entity physical simulating device that can carry out to full-scale electric logging probe bad ground log response test, the theory and the numerical simulation result that are used for checking electric logging probe, improve and optimization probe designs parameter, this device has important practical value for the research and development of the especially high-end equipment of oil electrical log equipment.The embodiment of the invention adopts hydrophilic macromolecule elastic gel and certain density inorganic salt solution to be configured to the blob of viscose of the different resistivity of cold curing, be used for serving as various stratum module, and according to certain technique be assembled into can Simulation of Complex stratum (having comprised up and down country rock, invaded zone and undisturbed formation, pit shaft etc.) the entity physical model.
Fig. 1 is the structural representation based on the electric logging probe physical simulating device of gel of the embodiment of the invention.Drawing reference numeral among Fig. 1 is described as follows:
The electric logging probe (coil type or electric pole type) that A is tested;
B wellhole (suggestion diameter 0.2m, well liquid typical resistivity 2 Ω m);
The upper country rock stratum of C simulation (suggest thickness greater than probe 1/2 length, typical resistivity 50 Ω m);
The target zone invaded zone of D simulation (suggestion target zone thickness 1m, invaded zone typical resistivity 5 Ω m);
The target zone undisturbed formation of E simulation (suggestion target zone thickness 1m, typical resistivity 10 Ω m);
The lower country rock stratum of F simulation (suggest thickness greater than probe 1/2 length, typical resistivity 50 Ω m);
G wellhole prolongation (the suggestion degree of depth is greater than probe 1/2 length).
As shown in Figure 1, above-mentioned electric logging probe entity physical simulating device comprises: the lower casing F that sets gradually from the bottom to top, target zone (D and E) and upper casing C, and the wellhole B that vertically runs through lower casing F, target zone (D and E) and upper casing C; Target zone comprises target zone undisturbed formation E and the target zone invaded zone D that sets gradually from outside to inside; Wherein, wellhole B vertically runs through target zone invaded zone D.
In one embodiment, this time casing, upper casing, target zone undisturbed formation and target zone invaded zone have respectively different resistivity.In another embodiment, this time casing has identical resistivity with upper casing, and this time casing, target zone undisturbed formation and target zone invaded zone have respectively different resistivity.
In the present embodiment, above-mentioned lower casing, upper casing, target zone undisturbed formation and target zone invaded zone are respectively by forming behind the different gel solidifications, and the gel corresponding from each layer is to boil rear formation by the hydrophilic macromolecule elastic gel is mixed with the inorganic salt solution with different ion concentrations respectively.
In the present embodiment, described lower casing forms after by the gel solidification with the required resistivity of lower country rock; Described target zone undisturbed formation forms after by the gel solidification with the required resistivity of target zone undisturbed formation; Described target zone invaded zone forms after by the gel solidification with the required resistivity in invaded zone; Described upper casing forms after by the gel solidification with the required resistivity of upper country rock.
Alternatively, in one embodiment, above-mentioned gel with the required resistivity of lower country rock, the gel with the required resistivity of target zone undisturbed formation, the gel with the required resistivity in invaded zone, the gel with the required resistivity of upper country rock are filled with respectively the plastics microballon.Preferably, the diameter of plastics microballon is 0.5mm-5mm.
Particularly, mix with inorganic salts (being inorganic salt solution) with a certain proportion of hydrophilic macromolecule elastic gel, pure water and to boil to form mobile gel, and injecting or filling process filling plastics microballon alternatively, gradation injection moulding is (after certain one deck injects, must wait for another layer that could inject different resistivity after solidifying, otherwise two-layer will the generation do not wished the mixing that occurs), can obtain the gel module of different resistivity behind the cooling curing, be used for the stratum of simulating the different geometrical size such as required target zone, invaded zone and country rock.
The reason of filled plastics microballon is in the gel in the embodiment of the invention, can increase on the one hand the vertical bearing capacity of module, reduce on the other hand the conductive capability of module by the porosity conductive channel, so that ion concentration is unlikely to too low and is difficult to realize during the simulation higher electric resistivity.The diameter of plastics microballon can be selected between 0.5 ~ 5mm, and the effect of the too large then restriction conduction of diameter becomes not obvious, and the high resistivity module should be selected the plastics microballon of small diameter.In the certain situation of ion concentration, the different microballon of diameter mixes according to a certain percentage can obtain higher resistivity (simulation as fine and close casing, high oiliness reservoir).For example the microballon of diameter 5mm accounts for 20% as one, and the microballon of diameter 1mm accounts for 80%.
Alternatively, in another embodiment, above-mentioned gel with the required resistivity of lower country rock, have the required resistivity of target zone undisturbed formation gel, have the required resistivity in invaded zone gel, have in the gel of the required resistivity of upper country rock and mixed respectively different inorganic pigments, with the layer position of sign simulation.
Alternatively, device also can further comprise: be implanted in a plurality of conductivity probe in lower casing, target zone and the upper casing, a plurality of conductivity probe connection data acquisition systems.Implant several conductivity probe in the stratum module that each is simulated, the stratum module of simulating by Real-Time Monitoring is electrically with the measurement performance of accurate checking probe.
In the present embodiment, be to adopt the hydrophilic macromolecule elastic gel to make up the entity physical simulating device that is applied to the electric logging probe.Utilize hydrophilic macromolecule elastic gel and salting liquid to be configured to according to a certain percentage the blob of viscose of the different resistivity of cold curing, be used for serving as the stratum module of different resistivity, adopt different inorganic salt compounds can obtain required ionic type (such as sodium, calcium, magnesium, potassium etc.), different ion concentration (also claiming salinity) can obtain different resistivity (or electrical conductivity), by moulding progressively or assemble a plurality of blob of viscoses and can simulate different structure, the bad ground of different electrical property features, and each colloid module can keep electrical properties separately, and the coupled interface of intermodule can form the interface (also claiming electric double layer) of the ion concentration variation that is similar in the actual permeable formation.Therefore, can more real quantification simulation actual complex stratum be crucial innovation of the present invention place.
In the present embodiment, because the mechanical strength of hydrophilic macromolecule elastic gel is not high, in use should adopt the probe of testing with the boom hoisting lifting of accurate positioning performance, the probe bottom is added with suitable counterweight to guarantee placed in the middle in " pit shaft " of physical simulating device and to stablize.
If the probe below also has and the parts (such as electronic short piece) of probe without direct relation itself, this analogue means central lower also needs to reserve the cave suitable with borehole size (being commonly called as rat hole, the cylinder G that goes out for analogue means bottom with dashed lines structure among Fig. 1).In one embodiment, rat hole G is a part that belongs to analogue means, and the effect of this part is exactly for so that probe can be in the simulated formation, and the parts such as electronic short piece of probe bottom can be in this cave.G partly is exactly the cave that links to each other with wellhole that arranges in the bottom of analogue means, and the diameter of diameter and wellhole is identical.Suggestion leaves rat hole, so slow lifting or the signal dynamics response process when falling probe and can accurately simulate by bed boundary, and this checking for detector performance needs often.
The structure of model is axisymmetric (namely can describe with cylindrical coordinate) among the present invention.When wellhole during with inclination mode " insertion " stratum, just formed and to have simulated the more condition of bad ground.Also namely adopt suitable technique can simulate bad ground under the inclined borehole, can carry out very critical Complex Response checking to the high-end three-dimensional imaging well logging probe of the types such as three-component induction logging probe and non-pushing type azimuthal array laterolog probe also is the method that the present invention can further extend.
The advantage of the electric logging probe entity physical simulating device of the embodiment of the invention is:
This device can be simulated variously layer size and conductive characteristic easily.And entity physical simulating device of the present invention, adopt the hydrophilic macromolecule elastic gel as the key material of simulated formation module, this device can be used in the physical analogy to full-scale electric logging probe, can be used for checking and comprise vertical, radial investigation characteristics, certainty of measurement, longitudinal frame is in interior probe log response characteristic.
Fig. 2 is the formation method flow diagram based on the electric logging probe physical simulating device of gel of the embodiment of the invention.As shown in Figure 2, according to typically layer model shown in Figure 1, the formation method of the electric logging probe entity physical simulating device that the embodiment of the invention proposes comprises the steps:
110, form the carrying container of entity physical simulating device.
Particularly, all can be used as the container of carrying entity physical simulating device with the cement drum of plastic plate moulding sweat soldering or brick one-tenth.
120, form the pit shaft container, described pit shaft container is arranged at the central authorities of described carrying container.
Particularly, this step is that the column water-filled vessel of serving as pit shaft is placed in the location, and column only is a preferred embodiment, should not consist of the restriction to the embodiment of the invention.
130, the gel of configuration with the required resistivity of lower country rock, and will be described have the required resistivity of lower country rock gel-filled between described carrying container and the described pit shaft container, reach lower country rock gauge, casing under the formation after solidifying fully.
140, form the invaded zone container with hollow via-hole, be arranged at described invaded zone container in the described carrying container and be positioned on the described lower casing, in described invaded zone container is located at described pit shaft container set by described hollow via-hole.
Particularly, this step is to be inserted in the water-filled vessel of serving as the invaded zone in the water-filled vessel outside of serving as pit shaft, is seated in the top of lower casing/module.
In step 120,140, adopt thicker (such as 0.2 ~ 0.5mm), plastic sheeting that intensity is higher makes respectively pit shaft container and invaded zone container according to borehole size, invaded zone module size with melt process, said vesse is connected to water pipe and can seals, be full of water and keep serving as after the shape mould of colloid moulding with certain pressure, draw water after the colloid moulding and can realize the demoulding.Wherein the shape of each container is not limited to the column that illustrates as exemplary.
150, dispose the gel with the required resistivity of target zone undisturbed formation, and with described have the required resistivity of target zone undisturbed formation gel-filled between described carrying container and the described invaded zone container, layer thickness size, fully formation target zone undisturbed formation after the curing achieve the goal.
160, dispose the gel with the required resistivity in invaded zone, and with described have the required resistivity in invaded zone gel-filled in the container of described invaded zone, a layer invaded zone gauge achieves the goal, form the target zone invaded zone after solidifying fully, described target zone undisturbed formation and described target zone invaded zone consist of target zone.
Particularly, this step is to take out and enable to take out serving as water in the water-filled vessel of invaded zone, the gel of the required resistivity in configuration invaded zone, and it is fills up to the target zone gauge in the container of invaded zone, until solidify fully, to form the target zone invaded zone.So far comprised the moulding of target zone module of invaded zone and undisturbed formation.
170, dispose the gel with the required resistivity of upper country rock, and with described have the required resistivity of upper country rock gel-filled between described carrying container and the described pit shaft container and on the described target zone, reach the country rock gauge, form upper casing after solidifying fully.
Particularly, this step is with the step 130 that forms lower casing.
Particularly, the gel that described configuration has the required resistivity of lower country rock comprises: utilize hydrophilic macromolecule elastic gel and the first inorganic salt solution with first ion concentration to dispose according to designated ratio, form the gel with the required resistivity of lower country rock; Above-mentioned configuration refers to and will boil after the corresponding inorganic salt solution mixing of hydrophilic macromolecule elastic gel or heat.
The gel that described configuration has the required resistivity of target zone undisturbed formation comprises: utilize hydrophilic macromolecule elastic gel and the second inorganic salt solution with second ion concentration to dispose according to designated ratio, have the gel of the required resistivity of target zone undisturbed formation with formation;
The gel that described configuration has the required resistivity in invaded zone comprises: utilize hydrophilic macromolecule elastic gel and the 3rd inorganic salt solution with three ion concentrations to dispose according to designated ratio, have the gel of the required resistivity in invaded zone with formation;
The gel that described configuration has the required resistivity of upper country rock comprises: utilize hydrophilic macromolecule elastic gel and the 4th inorganic salt solution with the 4th ion concentration to dispose according to designated ratio, form the gel with the required resistivity of upper country rock.
Further, the method also comprise the steps: described gel with the required resistivity of lower country rock, have the required resistivity of target zone undisturbed formation gel, have the required resistivity in invaded zone gel, have in the forming process of gel of the required resistivity of country rock, mix the plastics microballon to each gel respectively.Alternatively, the diameter of described plastics microballon is 0.5-5mm.
Further, the method can also comprise the steps: described gel with the required resistivity of lower country rock, have the required resistivity of target zone undisturbed formation gel, have the gel of the required resistivity in invaded zone, mix respectively different inorganic pigments in the gel of the required resistivity of country rock on having, with the layer position of sign simulation.
In the present embodiment, character according to gel, after virgin rubber (hydrophilic macromolecule elastic gel), pure water, inorganic salts mixed according to the rules temperature boil (normally in water-bath), be cooled to mix the plastics microballon after the uniform temperature, with the mechanical strength that guarantees module with reach required artifical resistance rate value, also can in gel, dope micro-inorganic pigment to the layer position of simulating color marking in addition.
Need to prove: the ratio of different its mixing waters of gel, solidification temperature, intensity etc. are all not identical.This is concrete technology and problem of materials, and the permissible range of its parameter variation range, operation is very large, and is irrelevant with flesh and blood of the present invention, need not specify or the refinement restriction.The essence of innovative idea of the present invention is: by forming and keeping the gel piece of different ions concentration to simulate the combination on the various stratum of different resistivity (this also just existing the whole bag of tricks all do not have fine accomplishing-such as the record of background technology of the present invention); Above-mentioned " set point of temperature " that relates to of the present invention, " uniform temperature ", " certain proportion " are the explanations as process aspect, only are a kind of promptings, can adjust according to Design and material in practical application.
Further, the method can also comprise the steps: to arrange in the both sides of described carrying container two plate electrodes, respectively as B electrode and the N electrode of electric pole type electric logging probe.Particularly, place two surface areas in the carrying container both sides and be not less than 0.1m
2Plate electrode, as B electrode (screen flows back to path electrode) and the N electrode (main current loop electrode) of electric pole type (current focusing) electric logging probe, these electrode pair coil type electric logging probes are without acting on also without impact respectively.
Further, the water in the water-filled vessel (being the pit shaft container) that the method also comprises the steps: to serve as pit shaft is taken out the pit shaft container can be taken out, and the water that this partial volume injects certain ion concentration of required resistivity is served as well liquid.Be axisymmetric on the pit shaft geometry, the part filling well liquid (also being deionized water solution) of hollow is wrapped up (being so-called carrying) by the stratum that gel is simulated.
Further, when the method comprises the steps: that also each module " is built ", need to be in symmetrical several (3 or the above getting final product) conductivity probe of placing of outer rim near module; This probe adopts bipolar four line modes (a pair of current loop and a pair of voltage circuit connect respectively after the Shielded Twisted Pair and draw after whole the winding), and the impact of outside conduction is insulated to reduce in the back side of probe electrode; These probes are connected to data collecting system and are used for Real-Time Monitoring module electrical conductivity during work, can Tc, time becomes etc. the detector measurement effect of parameters, makes results of Physical accurately and reliably.
So far, a typical implementation process of the present invention is finished.Because the mechanical strength of hydrophilic macromolecule elastic gel is not high, in use should adopt the probe of testing with the boom hoisting lifting of accurate positioning performance, the probe bottom is added with suitable counterweight to guarantee placed in the middle in " pit shaft " of physical simulating device and to stablize.
If the probe below also has and the parts (such as electronic short piece) of probe without direct relation itself, the described device central lower of this method also needs to reserve the cave suitable with borehole size (being commonly called as rat hole, the cylinder that analogue means bottom with dashed lines structure goes out among Fig. 1).Suggestion leaves rat hole, so slow lifting or the signal dynamics response process when falling probe and can accurately simulate by bed boundary, and this checking for detector performance needs often.
In the process that each layer colloidal sol " is built ", fusion and the infiltration of interlayer allow, and are useful for real simulated formation.The certain error of model on manufacturing dimension (as the impact that is not more than ± 3cm) causes (to radially with the vertical response feature) be fully negligible, because measuring accuracy and the spatial resolution of any electric logging probe itself are not high, relative error usually at ± 2% ~ 10%(in the two ends error of measuring dynamic range even also much bigger).
The advantage of embodiment of the method for the present invention is: can simulate easily variously layer size and conductive characteristic by the device that the method forms.Entity physical simulating device of the present invention, adopt the hydrophilic macromolecule elastic gel as the key material of simulated formation module, this device can be used in the physical analogy to full-scale electric logging probe, can be used for checking and comprise vertical, radial investigation characteristics, certainty of measurement, longitudinal frame is in interior probe log response characteristic.
Above embodiment only in order to the technical scheme of the embodiment of the invention to be described, is not intended to limit; Although with reference to previous embodiment the embodiment of the invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the embodiment of the invention.
Claims (13)
1. formation method based on the electric logging probe entity physical simulating device of gel is characterized in that described method comprises:
Form the carrying container of entity physical simulating device;
Form the pit shaft container, described pit shaft container is arranged at the central authorities of described carrying container;
The gel that configuration has the required resistivity of lower country rock, and will be described have the required resistivity of lower country rock gel-filled between described carrying container and the described pit shaft container, reach lower country rock gauge, casing under the formation after solidifying fully;
Formation has the invaded zone container of hollow via-hole, is arranged at described invaded zone container in the described carrying container and is positioned on the described lower casing, in described invaded zone container is located at described pit shaft container set by described hollow via-hole;
The gel that configuration has the required resistivity of target zone undisturbed formation, and with described have the required resistivity of target zone undisturbed formation gel-filled between described carrying container and the described invaded zone container, layer thickness size, fully formation target zone undisturbed formation after the curing achieve the goal;
The gel that configuration has the required resistivity in invaded zone, and with described have the required resistivity in invaded zone gel-filled in the container of described invaded zone, a layer invaded zone gauge achieves the goal, form the target zone invaded zone after solidifying fully, described target zone undisturbed formation and described target zone invaded zone consist of target zone;
The gel that configuration has the required resistivity of upper country rock, and with described have the required resistivity of upper country rock gel-filled between described carrying container and the described pit shaft container and on the described target zone, reach the country rock gauge, form upper casing after solidifying fully.
2. method according to claim 1 is characterized in that,
The gel that described configuration has the required resistivity of lower country rock comprises: utilize hydrophilic macromolecule elastic gel and the first inorganic salt solution with first ion concentration to dispose according to designated ratio, form the gel with the required resistivity of lower country rock;
The gel that described configuration has the required resistivity of target zone undisturbed formation comprises: utilize hydrophilic macromolecule elastic gel and the second inorganic salt solution with second ion concentration to dispose according to designated ratio, form the gel with the required resistivity of target zone undisturbed formation;
The gel that described configuration has the required resistivity in invaded zone comprises: utilize hydrophilic macromolecule elastic gel and the 3rd inorganic salt solution with the 3rd ion concentration to dispose according to designated ratio, form the gel with the required resistivity in invaded zone;
The gel that described configuration has the required resistivity of upper country rock comprises: utilize hydrophilic macromolecule elastic gel and the 4th inorganic salt solution with the 4th ion concentration to dispose according to designated ratio, form the gel with the required resistivity of upper country rock.
3. method according to claim 2 is characterized in that, described method also comprises:
Described gel with the required resistivity of lower country rock, have the required resistivity of target zone undisturbed formation gel, have the required resistivity in invaded zone gel, have in the forming process of gel of the required resistivity of country rock, mix the plastics microballon to each gel respectively.
4. method according to claim 3 is characterized in that, the diameter of described plastics microballon is 0.5mm-5mm.
5. according to claim 2 or 3 described methods, it is characterized in that described method also comprises:
Described gel with the required resistivity of lower country rock, have the required resistivity of target zone undisturbed formation gel, have the gel of the required resistivity in invaded zone, mix respectively different inorganic pigments in the gel of the required resistivity of country rock on having, with the layer position of sign simulation.
6. method according to claim 1 is characterized in that, described method also comprises:
Two plate electrodes are set, respectively as B electrode and the N electrode of electric pole type electric logging probe in the both sides of described carrying container.
7. electric logging probe entity physical simulating device based on gel is characterized in that described device comprises:
The lower casing that sets gradually from the bottom to top, target zone and upper casing, and the wellhole that vertically runs through described lower casing, described target zone and described upper casing;
Described target zone comprises target zone undisturbed formation and the target zone invaded zone that sets gradually from outside to inside; Wherein, described wellhole vertically runs through described target zone invaded zone.
8. device according to claim 7 is characterized in that,
Described lower casing, described upper casing, described target zone undisturbed formation and described target zone invaded zone have respectively different resistivity; Perhaps,
Described lower casing has identical resistivity with described upper casing, and described lower casing, described target zone undisturbed formation and described target zone invaded zone have respectively different resistivity.
9. device according to claim 7, it is characterized in that, described lower casing, described upper casing, described target zone undisturbed formation and described target zone invaded zone are respectively by forming behind the different gel solidifications, and the gel corresponding from each layer is to boil rear formation by the hydrophilic macromolecule elastic gel is mixed with the inorganic salt solution with different ion concentrations respectively.
10. according to claim 7,8 or 9 described devices, it is characterized in that,
Described lower casing forms after by the gel solidification with the required resistivity of lower country rock;
Described target zone undisturbed formation forms after by the gel solidification with the required resistivity of target zone undisturbed formation;
Described target zone invaded zone forms after by the gel solidification with the required resistivity in invaded zone;
Described upper casing forms after by the gel solidification with the required resistivity of upper country rock.
11. device according to claim 10, it is characterized in that described gel with the required resistivity of lower country rock, the gel with the required resistivity of target zone undisturbed formation, the gel with the required resistivity in invaded zone, the gel with the required resistivity of upper country rock are filled with respectively the plastics microballon.
12. device according to claim 10, it is characterized in that, described gel with the required resistivity of lower country rock, have the required resistivity of target zone undisturbed formation gel, have the required resistivity in invaded zone gel, have in the gel of the required resistivity of upper country rock and mixed respectively different inorganic pigments, with the layer position of sign simulation.
13. device according to claim 7 is characterized in that, described device also comprises:
Be implanted in a plurality of conductivity probe in described lower casing, target zone and the upper casing, described a plurality of conductivity probe connection data acquisition systems.
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