CN101937105A - Method for detecting hydrocarbon reservoir by low-frequency signal and device thereof - Google Patents
Method for detecting hydrocarbon reservoir by low-frequency signal and device thereof Download PDFInfo
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Abstract
The invention relates to a method for detecting a hydrocarbon reservoir by low-frequency signal and a device thereof, belonging to the technical field of oil-gas exploration; the method comprises the following steps: sending a plurality of low-frequency detection signals to target formation, receiving the low-frequency detection signals passing through the target formation, and gaining the voltage vector parameters and the current vector parameters corresponding to the low-frequency detection signals from the received low-frequency detection signals, then gaining the resistivity of the target formation according to the voltage vector parameters and the current vector parameters corresponding to the low-frequency detection signals from the received low-frequency detection signals, and finally detecting the oil-gas condition of the target formation according to the resistivity and the dielectric constant of the target formation or the correspondence of the dispersion parameters of the target formation. The embodiment of the invention can detect hydrocarbon reservoir more accurately because of less influence when the hydrocarbon reservoir is detected, thereby having ideal effect of hydrocarbon reservoir detection.
Description
Technical field
The embodiment of the invention relates to the oil-gas exploration technical field, particularly a kind of method and device that detects hydrocarbon zone by low frequency signal.
Background technology
Along with the mankind's fast development, the demand of the energy is grown with each passing day, wherein the demand to oil, rock gas is more strong.Because the stratal configuration complexity, the stratum of storage oil gas is darker, and this brings very big difficulty with regard to the exploration of giving hydrocarbon zone.Prior art mainly is to survey hydrocarbon zone by the resistivity that detects the stratum or the specific inductive capacity on stratum.
Yet the resistivity on stratum is subjected to the influence of several factors, and some factor fails quantitative description so far, brings very big difficulty therefore for the identification of hydrocarbon zone, is to be difficult to accurately realize such as surveying with resistivity that low resistivity hydrocarbon hides.Though it is less to survey the affected factor of hydrocarbon zone by the specific inductive capacity that detects the stratum, the degree of depth of surveying the stratum is more shallow, even surveys less than virgin zone, is difficult to reach the ideal effect of surveying hydrocarbon zone in actual detection.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of method and device that detects hydrocarbon zone by low frequency signal, the influence that method that the embodiment of the invention is provided when detecting hydrocarbon zone and device are subjected to is less, thereby can survey hydrocarbon zone more accurately, reach the ideal effect of surveying hydrocarbon zone.
For achieving the above object, the embodiment of the invention provides a kind of method by low frequency signal detection hydrocarbon zone, and described method comprises:
Launch the measuring-signal of a plurality of different low frequencies to formation at target locations;
Each low frequency measurement signal of described formation at target locations is passed in reception;
From each low frequency measurement signal that receives, obtain the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
According to the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence that gets access to, obtain the resistivity of described formation at target locations;
According to known described resistivity and specific inductive capacity or with the corresponding relation of Dispersion parameter, detect the oil gas situation of described formation at target locations.
In order effectively to obtain the resistivity of described formation at target locations, the described resistivity of obtaining formation at target locations comprises:
Obtain the voltage vector parameter and the pairing telegram in reply resistance of current phasor parameter of each low frequency measurement signal correspondence;
Obtain the complex resistivity of corresponding telegram in reply resistance according to predetermined calibration factor.
In order effectively to detect the oil gas situation of described formation at target locations by specific inductive capacity, described corresponding relation according to resistivity and specific inductive capacity, the oil gas situation that detects described formation at target locations comprises:
According to the complex resistivity that gets access to and the known described complex resistivity and the corresponding relation of described specific inductive capacity, calculate the specific inductive capacity of described formation at target locations;
According to the specific inductive capacity of the described formation at target locations that calculates, obtain the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation.
In order effectively to obtain the hydrocarbon saturation parameter, the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation according to resistivity, specific inductive capacity and the Dispersion parameter acquiring of the described formation at target locations that gets access to described in the present embodiment comprises:
According to specific inductive capacity and the predetermined specific inductive capacity and the water percentage relation of the described formation at target locations that gets access to, obtain the formation at target locations water percentage of corresponding described formation at target locations specific inductive capacity;
Obtain water saturation parameter in the described formation at target locations water percentage according to the factor of porosity parameter that records in advance;
According to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
For effective oil gas situation by the described formation at target locations of Dispersion parameter detecting, described corresponding relation according to resistivity and Dispersion parameter, the oil gas situation that detects described formation at target locations comprises:
Obtain variation relation through predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
According to the corresponding relation of known resistivity and Dispersion parameter and the variation relation of predetermined Dispersion parameter of core experiment and described formation at target locations water saturation, obtain described formation at target locations water saturation parameter;
According to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
In order to realize the foregoing invention purpose, present embodiment also provides a kind of device by low frequency signal detection hydrocarbon zone, and described device comprises:
The signal transmitter unit is used for launching to formation at target locations the measuring-signal of a plurality of different low frequencies;
Signal receiving unit is used to receive each low frequency measurement signal that passes described formation at target locations of being launched by described signal transmitter unit;
First acquiring unit is used for obtaining from each low frequency measurement signal that described signal receiving unit receives the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
Second acquisition unit, the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence that is used for getting access to according to described first acquiring unit are obtained the resistivity of described formation at target locations;
Detecting unit is used for the resistivity that gets access to according to described second acquisition unit and known described resistivity and the corresponding relation of specific inductive capacity or Dispersion parameter, detects the oil gas situation of described formation at target locations.
In order effectively to obtain resistivity, second acquisition unit comprises described in the present embodiment:
First acquisition module is used to obtain the voltage vector parameter and the pairing telegram in reply resistance of current phasor parameter of each low frequency measurement signal correspondence;
Second acquisition module is used for obtaining according to predetermined calibration factor the complex resistivity of corresponding telegram in reply resistance.
In order effectively to detect the oil gas situation on stratum, described detecting unit can comprise:
Computing module is used for the complex resistivity that gets access to according to described second acquisition module and known described complex resistivity and the corresponding relation of specific inductive capacity, calculates the specific inductive capacity of described formation at target locations;
The 3rd acquisition module is used for the specific inductive capacity of the described formation at target locations that calculates according to described computing module, obtains the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation.
Wherein said the 3rd acquisition module is at the specific inductive capacity of the described formation at target locations that calculates according to described computing module, obtain when being used to discern the hydrocarbon saturation parameter of described formation at target locations oil gas situation, specifically be used for specific inductive capacity and predetermined specific inductive capacity and water percentage relation according to the described formation at target locations that gets access to, obtain the formation at target locations water percentage of corresponding described formation at target locations specific inductive capacity, obtain water saturation parameter in the described formation at target locations water percentage according to the factor of porosity parameter that records in advance, according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
In order effectively to detect the oil gas situation on stratum, described detecting unit can also comprise:
The 4th acquisition module is used to obtain the variation relation through predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
The 5th acquisition module, be used for the predetermined Dispersion parameter of core experiment that corresponding relation and described the 4th acquisition module according to known resistivity and Dispersion parameter get access to and the variation relation of described formation at target locations water saturation, obtain described formation at target locations water saturation parameter;
Computing module is used for the formation at target locations water saturation parameter that relation and described the 5th acquisition module according to known described water saturation parameter and hydrocarbon saturation parameter get access to, and calculates the hydrocarbon saturation parameter of formation at target locations.
The influence that the embodiment of the invention is subjected to when detecting hydrocarbon zone is less, can survey hydrocarbon zone more accurately, reaches the ideal effect of surveying hydrocarbon zone.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of schematic flow diagram that detects the hydrocarbon zone method by low frequency signal that Fig. 1 provides for the embodiment of the invention.
The another kind that Fig. 2 provides for the embodiment of the invention detects the schematic flow diagram of hydrocarbon zone method by low frequency signal.
Fig. 3 is the relationship change reference diagram of formation at target locations water percentage and specific inductive capacity.
Fig. 4 is the variation relation reference diagram of a kind of stratum water saturation of obtaining by core experiment in the embodiment of the invention.
Fig. 5 is the functional block diagram that low frequency signal detects the hydrocarbon zone device of passing through of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the 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.Illustrative examples of the present invention and explanation thereof are used to explain the present invention; but it is not as a limitation of the invention; 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 is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of technology that detects hydrocarbon zone by low frequency signal, this technology is obtained resistivity, specific inductive capacity and Dispersion parameter in the formation at target locations in the oil gas characteristic of comprehensive evaluation bottom by low frequency signal, thereby reaches desirable Effect on Detecting.
Based on this, present embodiment provides a kind of method by low frequency signal detection hydrocarbon zone, and as shown in Figure 1, Fig. 1 is the schematic flow diagram that low frequency signal detects the hydrocarbon zone method that passes through of present embodiment, and this flow process comprises the steps:
101. launch the measuring-signal of a plurality of different low frequencies to formation at target locations;
The described method of present embodiment will be launched the measuring-signal of a plurality of different low frequencies earlier to formation at target locations, the frequency of this low frequency signal is at 1～100kHz, the frequency of each low frequency measurement signal of emission is inequality, these low frequency measurement signals inequality can be launched one by one by electrode, also may be mixed together emission, freely determine according to actual conditions.
Pass each low frequency measurement signal of described formation at target locations 102. receive;
Each low frequency measurement signal that passes described formation at target locations that this step is launched by another electrode receiving step 101 is because each low frequency measurement signal is through the effect of formation at target locations, so the amplitude and the phase place of each low frequency measurement signal that receives all change.
103. from each low frequency measurement signal that receives, obtain the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
Because the amplitude and the phase place of each low frequency measurement signal that receives all change, from each low frequency measurement signal that receives, obtain the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence in this step, such as amplitude and the phase place of obtaining low frequency measurement signal corresponding voltage.
104. according to the voltage vector parameter of each low frequency measurement signal correspondence that gets access to and the resistivity of the described formation at target locations of current phasor parameter acquiring;
Because the amplitude and the phase place of each low frequency measurement signal that receives all change, so this step is according to the voltage vector parameter of each low frequency measurement signal correspondence that gets access to and the resistivity of the described formation at target locations of current phasor parameter acquiring, can carry out according to the relation formula about complex resistivity and resistivity in the prior art finding the solution of resistivity, repeat no more herein, and the complex resistivity of corresponding each low frequency measurement signal can be tried to achieve according to getting access to voltage vector parameter and current phasor parameter, such as going out corresponding telegram in reply resistance according to voltage vector parameter and current phasor calculation of parameter earlier, obtain the complex resistivity of corresponding telegram in reply resistance again according to predetermined calibration factor.
105. according to known described resistivity and specific inductive capacity or with the corresponding relation of Dispersion parameter, detect the oil gas situation of described formation at target locations.
Can be in the present embodiment according to the corresponding relation of known resistivity and specific inductive capacity or Dispersion parameter, detect the oil gas situation of formation at target locations, such as can obtaining the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation according to the corresponding relation of resistivity and specific inductive capacity or Dispersion parameter, thereby according to hydrocarbon saturation parameter recognition formation at target locations oil gas situation.For example determine the specific inductive capacity of formation at target locations according to the mathematical formulae of resistivity and specific inductive capacity expression corresponding relation, according to predetermined this specific inductive capacity and water percentage relation, obtain the formation at target locations water percentage of corresponding described formation at target locations specific inductive capacity, according to the water saturation parameter in the factor of porosity parameter acquisition formation at target locations water percentage that records in advance, according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate formation at target locations hydrocarbon saturation parameter.
Need to prove; in the present embodiment in above-mentioned step cited implementation method only be a kind ofly to those skilled in the art know that and understand the cited example of the described method of present embodiment in order to make; it can not be seen as the restriction that present embodiment is done, realize that according to this method any concrete enforcement means of the present invention are all in protection domain of the present invention.
Present embodiment provides another kind of method by low frequency signal detection hydrocarbon zone, and as shown in Figure 2, Fig. 2 is the schematic flow diagram that low frequency signal detects the hydrocarbon zone method that passes through of present embodiment, and this flow process comprises the steps:
201. launch the measuring-signal of a plurality of different low frequencies to formation at target locations.
Pass each low frequency measurement signal of described formation at target locations 202. receive;
203. from each low frequency measurement signal that receives, obtain the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
Step 201 in the present embodiment～203 are identical with step 101～103 in the foregoing description, so repeat no more.
204. obtain the voltage vector parameter and the pairing telegram in reply resistance of current phasor parameter of each low frequency measurement signal correspondence;
Such as the telegram in reply resistance that voltage vector is obtained different low frequency correspondences divided by current phasor.
205. obtain the complex resistivity of corresponding telegram in reply resistance according to predetermined calibration factor;
This calibration factor is a predetermined instrument constant in the laboratory, and complex resistivity just equals the product of calibration factor and telegram in reply resistance.So just can obtain the complex resistivity of each low frequency measurement signal correspondence.
206., calculate the specific inductive capacity of formation at target locations according to the complex resistivity that gets access to and the known described complex resistivity and the corresponding relation of specific inductive capacity;
This step can calculate specific inductive capacity according to the corresponding relation of the specific inductive capacity of complex resistivity and known this complex resistivity and formation at target locations.Wherein the corresponding relation of the specific inductive capacity of this complex resistivity and formation at target locations can be expressed as by mathematical formulae:
Formula: ρ wherein
*(ω)=ρ
R+ j ρ
XCorresponding complex resistivity obtains according to step 205, so according to this complex resistivity ρ
*(ω) can try to achieve DIELECTRIC CONSTANT.This DIELECTRIC CONSTANT of trying to achieve is the specific inductive capacity of formation at target locations.
207., obtain the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation according to the specific inductive capacity of the described formation at target locations that calculates.
The formation at target locations specific inductive capacity that this step calculates according to step 206 detects the oil gas situation of described formation at target locations, promptly the hydrocarbon saturation parameter according to formation at target locations detects, such as obtaining the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation according to the specific inductive capacity that gets access to.
Understand this step for those skilled in the art are clearer and detect hydrocarbon zone,, enumerate example and describe, need to prove that this example is schematically, can not be used as the restriction to claim at this by the hydrocarbon saturation parameter.
271., obtain the formation at target locations water percentage of corresponding formation at target locations specific inductive capacity according to specific inductive capacity and the predetermined specific inductive capacity and the water percentage relation of the described formation at target locations that gets access to.
When use is obtained the method for hydrocarbon saturation parameter by specific inductive capacity, can set up the relation of this water percentage and specific inductive capacity in advance, this relation records by carry out core experiment in the geology of similar formation at target locations, various low frequency measurement signals are formed the water percentage on stratum and the experimental data match of specific inductive capacity, as shown in Figure 3, Fig. 3 is the relationship change reference diagram of a kind of stratum water percentage and specific inductive capacity, wherein horizontal ordinate is a water percentage, ordinate is a specific inductive capacity, by each discrete point of Fig. 3 relation of water percentage and specific inductive capacity as can be seen.So, can obtain the pairing formation at target locations water percentage of specific inductive capacity of formation at target locations by predetermined specific inductive capacity and water percentage relation.
272. according to the water saturation parameter in the factor of porosity parameter acquisition formation at target locations water percentage that records in advance;
This step mesoporosity degree parameter can record according to existing measuring method, because water percentage equals the product of factor of porosity and water saturation, so water percentage that obtains according to step 271 and the factor of porosity parameter that records in advance can be obtained the water saturation of this formation at target locations under set specific frequency signal.
273., calculate the hydrocarbon saturation parameter of formation at target locations according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter.
Because hydrocarbon saturation=1-water saturation, so this step can be obtained the hydrocarbon saturation of formation at target locations, and hydrocarbon saturation promptly is the index of reaction hydrocarbon stratum situation, so can detect the oil gas situation of formation at target locations according to hydrocarbon saturation.
208. obtain variation relation through predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
Can predetermined Dispersion parameter τ according to core experiment, the variation relation of c and η and formation at target locations water saturation, as shown in Figure 4, Fig. 4 is the variation relation reference diagram of a kind of stratum water saturation of obtaining by core experiment in the present embodiment, horizontal ordinate is the frequency of low frequency measurement signal in Fig. 4, ordinate is the real part and the imaginary part of complex resistivity, can determine among Fig. 4 by Dispersion parameter τ by core experiment, c and η describe a curve of the variation relation of stratum water saturation, be each Dispersion parameter τ, c and η be corresponding equation of being made up of the water saturation parameter on mathematics, this step be exactly the variation relation that obtains Dispersion parameter and formation at target locations water saturation promptly be to obtain Dispersion parameter τ, c and η be corresponding equation of being made up of the water saturation parameter on mathematics.
209., obtain described formation at target locations water saturation parameter according to the corresponding relation of known resistivity and Dispersion parameter and the variation relation of predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
The known resistivity and the corresponding relation of Dispersion parameter can represent by the Cole-Cole formula in this step,
In the formula, ρ
0The resistivity that resistivity direct current during zero frequency records;
ω is an angular frequency;
τ is the relaxation time constant;
C is a frequency correlation coefficient.
According to previous step rapid 205 complex resistivity ρ as can be known
*(ω), wherein τ, c and η are the frequency dispersion special parameter, like this Dispersion parameter τ, c and η are brought into and can try to achieve formation at target locations water saturation parameter in the Cole-Cole formula with formation at target locations water saturation description back (i.e. the equation that the water saturation parameter of τ, c and η correspondence is formed on mathematics).Need to prove, determine that by core experiment the variation relation of predetermined Dispersion parameter and described formation at target locations water saturation is a prior art, can finish in the laboratory, this step is not done in detail at this and is given unnecessary details.
2010., calculate the hydrocarbon saturation parameter of formation at target locations according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter.
This step is identical with step 273, promptly according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculates the hydrocarbon saturation parameter of formation at target locations, repeats no more.So this step also can be obtained the hydrocarbon saturation of formation at target locations, and hydrocarbon saturation promptly is the index of reaction hydrocarbon stratum situation, so can detect the oil gas situation of formation at target locations according to hydrocarbon saturation.
From the described method of present embodiment as can be seen, the method of the described detection hydrocarbon zone of present embodiment can be obtained the corresponding relation of resistivity and specific inductive capacity or the Dispersion parameter and the water saturation of formation at target locations by the low frequency measurement signal, not only can be according to parameter that gets access to and corresponding relation by the oil gas situation that detects dark formation at target locations of specific inductive capacity, and can detect the oil gas situation of formation at target locations more accurately by the Dispersion parameter, reach the ideal effect of surveying hydrocarbon zone.
The device of realizing said method embodiment can be an autonomous device, below the device of realizing above-mentioned functions is described.As shown in Figure 5, Fig. 5 is the functional block diagram that low frequency signal detects the hydrocarbon zone device of passing through of the embodiment of the invention, as can be known from Fig. 5, this device can comprise: signal transmitter unit 501, signal receiving unit 502, first acquiring unit 503, second acquisition unit 504 and detecting unit 505, wherein
Signal receiving unit 502 is used to receive each low frequency measurement signal that passes described formation at target locations of being launched by described signal transmitter unit 501;
First acquiring unit 503 is used for obtaining from each low frequency measurement signal that described signal receiving unit 502 receives the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
Detecting unit 505 is used for the resistivity that gets access to according to described second acquisition unit 504 and known described resistivity and the corresponding relation of specific inductive capacity or Dispersion parameter, detects the oil gas situation of described formation at target locations.
Wherein second acquisition unit 504 can comprise:
Detecting unit 505 can comprise:
The 3rd acquisition module 552 is used for the specific inductive capacity of the described formation at target locations that calculates according to described computing module 551, obtains the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation.Such as specific inductive capacity and predetermined specific inductive capacity and water percentage relation according to the described formation at target locations that gets access to, obtain the formation at target locations water percentage of corresponding formation at target locations specific inductive capacity, according to the water saturation parameter in the factor of porosity parameter acquisition formation at target locations water percentage that records in advance, according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
Detecting unit 505 can also comprise:
The 4th acquisition module 553 is used to obtain the variation relation through predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
The 5th acquisition module 554, be used for the predetermined Dispersion parameter of core experiment that corresponding relation and described the 4th acquisition module 553 according to known resistivity and Dispersion parameter get access to and the variation relation of described formation at target locations water saturation, obtain described formation at target locations water saturation parameter;
Though need to prove that the device in the present embodiment is a virtual bench; but this virtual bench still can be finished repertoire by the corresponding entity device, so any relating to the present embodiment identity logic concerns that the entity apparatus of setting up is all within protection scope of the present invention.
Device described in the present embodiment can be launched low frequency signal to formation at target locations, and this low frequency signal that receives obtains the corresponding relation of resistivity and specific inductive capacity or the Dispersion parameter and the formation at target locations water saturation of formation at target locations, not only can be according to parameter that gets access to and corresponding relation by the oil gas situation that detects dark formation at target locations of specific inductive capacity, and can detect the oil gas situation of formation at target locations more accurately by the Dispersion parameter, reach the ideal effect of surveying hydrocarbon zone.
Certainly; above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above is specific embodiments of the invention only, and is not intended to limit the scope of the invention, and is all within logic of the present invention and principle; any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. one kind is detected the method for hydrocarbon zone by low frequency signal, it is characterized in that described method comprises:
Launch the measuring-signal of a plurality of different low frequencies to formation at target locations;
Each low frequency measurement signal of described formation at target locations is passed in reception;
From each low frequency measurement signal that receives, obtain the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
According to the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence that gets access to, obtain the resistivity of described formation at target locations;
According to the corresponding relation of known described resistivity and specific inductive capacity or Dispersion parameter, detect the oil gas situation of described formation at target locations.
2. method according to claim 1 is characterized in that, the described resistivity of obtaining formation at target locations comprises:
Obtain the voltage vector parameter and the pairing telegram in reply resistance of current phasor parameter of each low frequency measurement signal correspondence;
Obtain the complex resistivity of corresponding telegram in reply resistance according to predetermined calibration factor.
3. method according to claim 2 is characterized in that, described according to the known resistivity and the corresponding relation of specific inductive capacity, the oil gas situation that detects described formation at target locations comprises:
According to the complex resistivity that gets access to and the known described complex resistivity and the corresponding relation of described specific inductive capacity, calculate the specific inductive capacity of described formation at target locations;
According to the specific inductive capacity of the described formation at target locations that calculates, obtain the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation.
4. method according to claim 3 is characterized in that, the specific inductive capacity of the described formation at target locations that described basis calculates obtains the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation and comprises:
According to specific inductive capacity and the predetermined specific inductive capacity and the water percentage relation of the described formation at target locations that gets access to, obtain the formation at target locations water percentage of corresponding described formation at target locations specific inductive capacity;
Obtain water saturation parameter in the described formation at target locations water percentage according to the factor of porosity parameter that records in advance;
According to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
5. method according to claim 1 is characterized in that, described corresponding relation according to known resistivity and Dispersion parameter, and the oil gas situation that detects described formation at target locations comprises:
Obtain variation relation through predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
According to the corresponding relation of known resistivity and Dispersion parameter and the variation relation of predetermined Dispersion parameter of core experiment and described formation at target locations water saturation, obtain described formation at target locations water saturation parameter;
According to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
6. one kind is detected the device of hydrocarbon zone by low frequency signal, it is characterized in that described device comprises:
The signal transmitter unit is used for launching to formation at target locations the measuring-signal of a plurality of different low frequencies;
Signal receiving unit is used to receive each low frequency measurement signal that passes described formation at target locations of being launched by described signal transmitter unit;
First acquiring unit is used for obtaining from each low frequency measurement signal that described signal receiving unit receives the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence;
Second acquisition unit, the voltage vector parameter and the current phasor parameter of each low frequency measurement signal correspondence that is used for getting access to according to described first acquiring unit are obtained the resistivity of described formation at target locations;
Detecting unit is used for the resistivity that gets access to according to described second acquisition unit and known described resistivity and the corresponding relation of specific inductive capacity or Dispersion parameter, detects the oil gas situation of described formation at target locations.
7. device according to claim 6 is characterized in that, described second acquisition unit comprises:
First acquisition module is used to obtain the voltage vector parameter and the pairing telegram in reply resistance of current phasor parameter of each low frequency measurement signal correspondence;
Second acquisition module is used for obtaining according to predetermined calibration factor the complex resistivity of corresponding telegram in reply resistance.
8. device according to claim 7 is characterized in that, described detecting unit comprises:
Computing module is used for the complex resistivity that gets access to according to described second acquisition module and known described complex resistivity and the corresponding relation of specific inductive capacity, calculates the specific inductive capacity of described formation at target locations;
The 3rd acquisition module is used for the specific inductive capacity of the described formation at target locations that calculates according to described computing module, obtains the hydrocarbon saturation parameter that is used to discern described formation at target locations oil gas situation.
9. device according to claim 8, it is characterized in that, described the 3rd acquisition module is at the specific inductive capacity of the described formation at target locations that calculates according to described computing module, obtain when being used to discern the hydrocarbon saturation parameter of described formation at target locations oil gas situation, specifically be used for specific inductive capacity and predetermined specific inductive capacity and water percentage relation according to the described formation at target locations that gets access to, obtain the formation at target locations water percentage of corresponding described formation at target locations specific inductive capacity, obtain water saturation parameter in the described formation at target locations water percentage according to the factor of porosity parameter that records in advance, according to the known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
10. device according to claim 6 is characterized in that, described detecting unit also comprises:
The 4th acquisition module is used to obtain the variation relation through predetermined Dispersion parameter of core experiment and described formation at target locations water saturation;
The 5th acquisition module, be used for the predetermined Dispersion parameter of core experiment that corresponding relation and described the 4th acquisition module according to known resistivity and Dispersion parameter get access to and the variation relation of described formation at target locations water saturation, obtain described formation at target locations water saturation parameter;
Computing module is used for the formation at target locations water saturation parameter that relation and described the 5th acquisition module according to known described water saturation parameter and hydrocarbon saturation parameter get access to, and calculates the hydrocarbon saturation parameter of formation at target locations.
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| CN103046923A (en) * | 2011-10-13 | 2013-04-17 | 中国石油化工股份有限公司 | Method for fast recognizing low-resistivity oil and gas reservoirs through optimizing drilling mud |
| CN103439748A (en) * | 2013-08-26 | 2013-12-11 | 中国石油天然气集团公司 | Method for detecting stratum, method for calculating oil and gas saturation of stratum, combination electrode and detector |
| CN103995294A (en) * | 2014-05-13 | 2014-08-20 | 刘红岐 | Double-electrical-method mine water permeation detection method |
| CN106461808A (en) * | 2014-07-29 | 2017-02-22 | 易智高控股有限公司 | Water content detection device, water content detection method, and water content detection program |
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| CN103046923A (en) * | 2011-10-13 | 2013-04-17 | 中国石油化工股份有限公司 | Method for fast recognizing low-resistivity oil and gas reservoirs through optimizing drilling mud |
| CN103046923B (en) * | 2011-10-13 | 2015-10-21 | 中国石油化工股份有限公司 | A kind of Drilling optimization mud identifies the method for low resistivity hydrocarbon layers fast |
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| CN102736116B (en) * | 2012-06-15 | 2014-12-31 | 华中科技大学 | Electromagnetic wave detection method and device based on medium frequency dispersion difference |
| CN103439748A (en) * | 2013-08-26 | 2013-12-11 | 中国石油天然气集团公司 | Method for detecting stratum, method for calculating oil and gas saturation of stratum, combination electrode and detector |
| CN103439748B (en) * | 2013-08-26 | 2017-02-15 | 中国石油天然气集团公司 | Method for detecting stratum, method for calculating oil and gas saturation of stratum, combination electrode and detector |
| CN103995294A (en) * | 2014-05-13 | 2014-08-20 | 刘红岐 | Double-electrical-method mine water permeation detection method |
| CN103995294B (en) * | 2014-05-13 | 2016-09-21 | 刘红岐 | Double electrical method mine perviousness detection methods |
| CN106461808A (en) * | 2014-07-29 | 2017-02-22 | 易智高控股有限公司 | Water content detection device, water content detection method, and water content detection program |
| CN112394420A (en) * | 2020-11-19 | 2021-02-23 | 核工业北京地质研究院 | Ore body position determination method and system based on complex resistivity parameter |
| CN112394420B (en) * | 2020-11-19 | 2023-10-20 | 核工业北京地质研究院 | Ore body position determining method and system based on complex resistivity parameters |
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