CN101937105B - 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 stratal configuration is complicated, the stratum of storage oil gas is darker, and this brings very large 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 impact of several factors, and some factor fails quantitative description so far, brings very large difficulty therefore for the identification of hydrocarbon zone, is to be difficult to accurately realize such as survey low resistitvity reservoir with resistivity.Although 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 impact that the method that the embodiment of the invention provides when detecting hydrocarbon zone and device are subject to is less, thereby can survey more accurately hydrocarbon zone, 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 voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
Voltage vector parameter and the current phasor parameter corresponding according to each low frequency measurement signal that gets access to, obtain voltage vector parameter corresponding to each low frequency measurement signal and the corresponding telegram in reply resistance of current phasor parameter, obtain the complex resistivity of corresponding telegram in reply resistance according to predetermined calibration factor;
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;
Wherein, according to 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 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 specific inductive capacity and 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; According to the water saturation parameter in the described formation at target locations water percentage of the factor of porosity gain of parameter that records in advance; According to known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations;
According to the corresponding relation of known resistivity and Dispersion parameter, the oil gas situation that detects described formation at target locations comprises: obtain the variation relation through the 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 the 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 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 for measuring-signal from a plurality of different low frequencies to formation at target locations that launch;
Signal receiving unit is used for receiving each low frequency measurement signal that passes described formation at target locations of being launched by described signal transmitter unit;
The first acquiring unit, each low frequency measurement signal that is used for receiving from described signal receiving unit obtains voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
Second acquisition unit, for corresponding voltage vector parameter and the current phasor parameter of each low frequency measurement signal that gets access to according to described the first acquiring unit, obtain the resistivity of described formation at target locations, described second acquisition unit comprises: the first acquisition module is used for obtaining voltage vector parameter corresponding to each low frequency measurement signal and the corresponding telegram in reply resistance of current phasor parameter; The second acquisition module is for the complex resistivity that obtains corresponding telegram in reply resistance according to predetermined calibration factor;
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;
Described detecting unit can comprise: computing module, be used for the complex resistivity that gets access to according to described the second acquisition module and known described complex resistivity and the corresponding relation of specific inductive capacity, and calculate the specific inductive capacity of described formation at target locations; The 3rd acquisition module, the specific inductive capacity for the described formation at target locations that calculates according to described computing module obtains be used to the hydrocarbon saturation parameter of identifying 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 identifying the hydrocarbon saturation parameter of described formation at target locations oil gas situation, concrete specific inductive capacity and predetermined specific inductive capacity and the water percentage relation that is used for 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, according to the water saturation parameter in the described formation at target locations water percentage of the factor of porosity gain of parameter that records in advance, according to known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations;
Described detecting unit can also comprise: the 4th acquisition module is used for obtaining the variation relation through the 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 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, calculates the hydrocarbon saturation parameter of formation at target locations.
The impact that the embodiment of the invention is subject to when detecting hydrocarbon zone is less, can survey more accurately hydrocarbon zone, 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 was done to introduce simply during the below will describe embodiment, 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.
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 for explaining the present invention; but 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 obtains 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 to formation at target locations first the measuring-signal of a plurality of different low frequencies, the frequency of this low frequency signal is at 1～100kHz, the frequency of each low frequency measurement signal of emission is not identical, these not identical low frequency measurement signals 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 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 voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
Because amplitude and the phase place of each low frequency measurement signal that receives all change, from each low frequency measurement signal that receives, obtain voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter in this step, such as amplitude and the phase place of obtaining low frequency measurement signal corresponding voltage.
104. according to voltage vector parameter corresponding to each low frequency measurement signal that gets access to and the resistivity of the described formation at target locations of current phasor parameter acquiring;
Because amplitude and the phase place of each low frequency measurement signal that receives all change, so the voltage vector parameter that each low frequency measurement signal that this step basis gets access to is corresponding 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 first, obtain again the complex resistivity of corresponding telegram in reply resistance 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 according to the corresponding relation of known resistivity and specific inductive capacity or Dispersion parameter in the present embodiment, detect the oil gas situation of formation at target locations, such as can obtaining be used to the hydrocarbon saturation parameter of identifying 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 identification 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 gain of parameter formation at target locations water percentage that records in advance, according to 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 implementation 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 voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
204. obtain voltage vector parameter corresponding to each low frequency measurement signal and the corresponding telegram in reply resistance of current phasor parameter;
Such as voltage vector is obtained telegram in reply resistance corresponding to different low frequencies divided by current phasor.
205. obtain the complex resistivity of corresponding telegram in reply resistance according to predetermined calibration factor;
This calibration factor is 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 complex resistivity corresponding to each low frequency measurement signal.
206. according to the complex resistivity that gets access to and known described complex resistivity and the corresponding relation of specific inductive capacity, calculate the specific inductive capacity of formation at target locations;
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 ε.This DIELECTRIC CONSTANT ε of trying to achieve is the specific inductive capacity of formation at target locations.
207. according to the specific inductive capacity of the described formation at target locations that calculates, obtain be used to the hydrocarbon saturation parameter of identifying described formation at target locations oil gas situation.
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, namely the hydrocarbon saturation parameter according to formation at target locations detects, such as obtaining be used to the hydrocarbon saturation parameter of identifying 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 by the hydrocarbon saturation parameter, at this, enumerate example and describe, need to prove that this example is schematically, can not be used as limitations on claims.
271. according to specific inductive capacity and 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 formation at target locations specific inductive capacity.
Using when obtaining the method for hydrocarbon saturation parameter by specific inductive capacity, can set up in advance the relation of this water percentage and specific inductive capacity, 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 water percentage, ordinate is specific inductive capacity, can be found out the relation of water percentage and specific inductive capacity by the point of Fig. 3 various discrete.So by predetermined specific inductive capacity and water percentage relation, can obtain the corresponding formation at target locations water percentage of specific inductive capacity of formation at target locations.
272. according to the water saturation parameter in the factor of porosity gain of parameter 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 the 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. according to known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
Because hydrocarbon saturation=1-water saturation, so this step can be obtained the hydrocarbon saturation of formation at target locations, and hydrocarbon saturation namely 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 the variation relation through the 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 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 corresponding equation that is formed by the water saturation parameter all on mathematics, this step be exactly the variation relation that obtains Dispersion parameter and formation at target locations water saturation namely be to obtain Dispersion parameter τ, c and η corresponding equation that is formed by the water saturation parameter all on mathematics.
209. according to the corresponding relation of known resistivity and Dispersion parameter and the variation relation of the predetermined Dispersion parameter of core experiment and described formation at target locations water saturation, obtain described formation at target locations water saturation parameter;
Known resistivity and the corresponding relation of Dispersion parameter can represent complex resistivity in this step by the Cole-Cole formula
In the formula, ρ
0The resistivity that resistivity direct current during zero frequency records;
ω is angular frequency;
τ is relaxation time;
C is frequency correlation coefficient.
According to previous step 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 rear (equation that the water saturation parameter that namely τ, c and η are corresponding on mathematics forms).Need to prove, determine that by core experiment the variation relation of predetermined Dispersion parameter and described formation at target locations water saturation is prior art, can finish in the laboratory, this step is not done in detail at this and is given unnecessary details.
2010. according to known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
This step is identical with step 273, namely according to 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 namely is the index of reaction hydrocarbon stratum situation, so can detect the oil gas situation of formation at target locations according to hydrocarbon saturation.
Can find out from the described method of present embodiment, the method of the described detection hydrocarbon zone of present embodiment can be by the resistivity of low frequency measurement signal acquisition formation at target locations and the corresponding relation of specific inductive capacity or Dispersion parameter and water saturation, not only can be by the oil gas situation that detects darker formation at target locations of specific inductive capacity according to the parameter that gets access to and corresponding relation, and can detect more accurately by the Dispersion parameter oil gas situation of formation at target locations, reach the ideal effect of surveying hydrocarbon zone.
The device of realizing said method embodiment can be an autonomous device, and the below describes the device of realizing above-mentioned functions.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, the first acquiring unit 503, second acquisition unit 504 and detecting unit 505, wherein
Signal receiving unit 502 is used for receiving each low frequency measurement signal that passes described formation at target locations of being launched by described signal transmitter unit 501;
The first acquiring unit 503, each low frequency measurement signal that is used for receiving from described signal receiving unit 502 obtains voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
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:
The first acquisition module 541 is used for obtaining voltage vector parameter corresponding to each low frequency measurement signal and the corresponding telegram in reply resistance of current phasor parameter;
The second acquisition module 542 is for the complex resistivity that obtains corresponding telegram in reply resistance according to predetermined calibration factor.
Detecting unit 505 can comprise:
The 3rd acquisition module 552, the specific inductive capacity for the described formation at target locations that calculates according to described computing module 551 obtains be used to the hydrocarbon saturation parameter of identifying described formation at target locations oil gas situation.Such as specific inductive capacity and predetermined specific inductive capacity and the 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 gain of parameter formation at target locations water percentage that records in advance, according to 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 for obtaining the variation relation through the 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;
Although need to prove that the device in the present embodiment is 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 Dispersion parameter and the formation at target locations water saturation of formation at target locations, not only can be by the oil gas situation that detects darker formation at target locations of specific inductive capacity according to the parameter that gets access to and corresponding relation, and can detect more accurately by the Dispersion parameter oil gas situation of formation at target locations, 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 the protection domain that is not intended to limit the present invention is all within logic of the present invention and principle; any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
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 voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
Voltage vector parameter and the current phasor parameter corresponding according to each low frequency measurement signal that gets access to, obtain voltage vector parameter corresponding to each low frequency measurement signal and the corresponding telegram in reply resistance of current phasor parameter, obtain the complex resistivity of corresponding telegram in reply resistance according to predetermined calibration factor;
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;
Wherein, according to 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 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 specific inductive capacity and 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; According to the water saturation parameter in the described formation at target locations water percentage of the factor of porosity gain of parameter that records in advance; According to known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations;
According to the corresponding relation of known resistivity and Dispersion parameter, the oil gas situation that detects described formation at target locations comprises: obtain the variation relation through the 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 the 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 known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations.
2. 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 for measuring-signal from a plurality of different low frequencies to formation at target locations that launch;
Signal receiving unit is used for receiving each low frequency measurement signal that passes described formation at target locations of being launched by described signal transmitter unit;
The first acquiring unit, each low frequency measurement signal that is used for receiving from described signal receiving unit obtains voltage vector parameter corresponding to each low frequency measurement signal and current phasor parameter;
Second acquisition unit, for corresponding voltage vector parameter and the current phasor parameter of each low frequency measurement signal that gets access to according to described the first acquiring unit, obtain the resistivity of described formation at target locations, described second acquisition unit comprises: the first acquisition module is used for obtaining voltage vector parameter corresponding to each low frequency measurement signal and the corresponding telegram in reply resistance of current phasor parameter; The second acquisition module is for the complex resistivity that obtains corresponding telegram in reply resistance according to predetermined calibration factor;
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;
Described detecting unit comprises: computing module, be used for the complex resistivity that gets access to according to described the second acquisition module and known described complex resistivity and the corresponding relation of specific inductive capacity, and calculate the specific inductive capacity of described formation at target locations; The 3rd acquisition module, the specific inductive capacity for the described formation at target locations that calculates according to described computing module obtains be used to the hydrocarbon saturation parameter of identifying described formation at target locations oil gas situation;
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 identifying the hydrocarbon saturation parameter of described formation at target locations oil gas situation, concrete specific inductive capacity and predetermined specific inductive capacity and the water percentage relation that is used for 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, according to the water saturation parameter in the described formation at target locations water percentage of the factor of porosity gain of parameter that records in advance, according to known described water saturation parameter and the relation of hydrocarbon saturation parameter, calculate the hydrocarbon saturation parameter of formation at target locations;
Described detecting unit also comprises: the 4th acquisition module is used for obtaining the variation relation through the 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 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, calculates the hydrocarbon saturation parameter of formation at target locations.
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| 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 |
| 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 |
| 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 |
| CN103995294B (en) * | 2014-05-13 | 2016-09-21 | 刘红岐 | Double electrical method mine perviousness detection methods |
| WO2016017507A1 (en) * | 2014-07-29 | 2016-02-04 | 株式会社いちごホールディングス | Water content detection device, water content detection method, and water content detection program |
| 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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