CN108983298A - A kind of four-dimensional electromagnetic monitoring method and system in real time of oil gas pressure break - Google Patents
A kind of four-dimensional electromagnetic monitoring method and system in real time of oil gas pressure break Download PDFInfo
- Publication number
- CN108983298A CN108983298A CN201810549356.9A CN201810549356A CN108983298A CN 108983298 A CN108983298 A CN 108983298A CN 201810549356 A CN201810549356 A CN 201810549356A CN 108983298 A CN108983298 A CN 108983298A
- Authority
- CN
- China
- Prior art keywords
- residual error
- electric field
- magnetic field
- monitoring
- pressure break
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/38—Processing data, e.g. for analysis, for interpretation, for correction
Abstract
The embodiment of the present invention provides a kind of oil gas pressure break four-dimensional electromagnetic monitoring method and system in real time, method includes: in each fracturing section work progress, an excitation of electromagnetic wave signal for well direction transmitting different frequency is led along pressure break, pressure break is obtained and leads the electric field signal in electric field signal and fracturing process before several monitoring points in a well monitoring range are in pressure break；The residual error electric field of each monitoring point is obtained based on the electric field signal in the electric field signal and fracturing process before pressure break, and electric field residual error degree is obtained according to residual error electric field；Electric field residual error degree based on each monitoring point obtains fracturing fracture in the areal extent and fracturing effect in space, the electric field signal for simultaneously receiving feedback simultaneously by transmitting excitation of electromagnetic wave signal monitors fracturing section transverse direction, genesis analysis crack areal extent using variation characteristic of the electric field signal on room and time；Electric field signal versus time curve feature is obtained to analyze FRACTURE CHARACTERISTICS using continuous observation, judges that crack is main large fracture or uniformly stitches net.
Description
Technical field
The present embodiments relate to the oil gas development technology field in Key words exploration geophysics field more particularly to a kind of oil gas pressures
Split four-dimensional electromagnetic monitoring method and system in real time.
Background technique
In oil field, pressure break refers in oil recovery or gas production process, using hydraulic action, oil-gas Layer is made to form the one of crack
Kind method, also known as hydraulic fracturing.Pressure break is that stratum is artificially made to generate crack, improves oil in the flowing environment of underground, makes oil well
Yield increases, and can play an important role to improving oil well shaft bottom flox condition, slowing down interlayer and improving reservoir producing situation.Pressure
The method split divides hydraulic fracturing and high enegry gas fracturing two major classes, and hydraulic fracturing is to lean on high pressure pump truck vehicle group in ground by fluid high-speed
In injection well, the high pressure suppressed by shaft bottom makes reservoir rock rupture generate crack.After preventing pump truck from stopping working, pressure
Decline, crack voluntarily closes up again, in the injection liquid after formation fracture, the sand of the big several times of mixing ratio density of earth formations, and cocurrent flow
Body enters crack together, and permanently rests in crack, and supporting crack is in the open state, changes oil stream environment for a long time
It is kind.Current hydraulic fracturing technology is highly developed, and oil well production increasing effect is obvious, early has become the common technology of people's first choice.
After oil/gas well implements fracturing reform measure, effective monitoring method is needed to determine fracturing work effect, obtains pressure
All multi informations such as induced fractures flow conductivity, geometric shape, complexity and its orientation are split, to improve shale gas reservoir fracturing yield increasing work
Industry effect and gas well deliverability, and improve shale gas recovery ratio.Monitoring method in the prior art will have: underground microseism, straight
Close to pit shaft monitoring fractures, distributed acoustic sensor.
Underground micro-seismic monitoring method is that the principle of micro-seismic event can be induced according to fluid injection, utilizes the wave field pair of return
The response characteristic in gas-bearing reservoir crack carries out wave field response analysis, obtains the monitoring reaction result of corresponding pressure break；Micro-seismic monitoring is
Matching technology in shale gas reservoir hydrfracturing transformation process, but at present since microseismic limits, because of seismic wave
The reasons such as signal can constantly decay when propagating in the earth formation, wellbore environment noise is big, pump pressure and pump speed, cannot be largely effective intuitive
Describe growth course, geometry and the spatial in the crack of hydraulic fracturing transformation reservoir in ground；Directly close pit shaft monitoring fractures
Method principle: monitoring technology is by the fluid physics characteristic of shale gas well after well logging pressure break, the nearly pit shaft range fracture parameters of inverting
Information mainly includes isotopic tracer method, temperature logging etc.；But directly close pit shaft monitoring fractures method does not have real-time monitoring
Function, monitoring range is small, is typically only capable to as the means of supplementing out economy；Distributed acoustic sensor monitoring method is to use optical fibers as sound biography
Feel the sound distribution situation along transmission medium real-time monitoring optical fiber, and then obtains crack information；Distributed acoustic sensor monitoring method
There is good reaction in inclination angle, the orientation of fracture, but are unable to the slit width of effecting reaction complex fracture, the high data of seam.
Summary of the invention
The embodiment of the present invention provides a kind of oil gas pressure break four-dimensional electromagnetic monitoring method and system in real time, to solve existing skill
It intuitively cannot comprehensively describe asking for the growth course in crack of hydraulic fracturing transformation reservoir, geometry and spatial in art
Topic.
The embodiment of the present invention provides a kind of oil gas pressure break four-dimensional electromagnetic monitoring method in real time, comprising:
In each fracturing section work progress, same parallel or perpendicular to horizontal well direction set distance extroversion pressure break destination layer
When transmitting include different frequency excitation of electromagnetic wave signal, obtain pressure break and lead several monitoring points in a well monitoring range and be in pressure break
Electric field signal or magnetic field signal in preceding electric field signal or magnetic field signal and fracturing process；
Based in the electric field signal or magnetic field signal and fracturing process before pressure break electric field signal or magnetic field signal obtain respectively
The residual error electric field of a monitoring point or residual error magnetic field or residual error resistivity, and according to the residual error electric field or residual error magnetic field or residual error electricity
Resistance rate obtain electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and its corresponding single order second order airspace vector difference and
One second order time domain vector difference；
Residual error electric field, residual error magnetic field, residual error resistivity and its time-domain difference and electric field residual error based on each monitoring point
Degree or magnetic field residual error degree or resistivity residual error degree and corresponding single order second order airspace vector difference and a second order time domain vector difference
It obtains geometry areal extent, main seam of the fracturing fracture in space and nets fracturing fluid crossfire evaluation between seam characteristic evaluating, section.
Preferably, before each fracturing section construction further include:
It is including several dominant frequency and harmonic wave parallel or perpendicular to horizontal well direction set distance extroversion pressure break target layer arrangement
Signal emitting-source, the signal emitting-source includes excitation of electromagnetic wave signal excitation source and electric dipole.
Preferably, before each fracturing section construction further include:
It is led in the pressure break and arranges several monitoring points in well monitoring range, each monitoring point is provided with electric field monitoring sensing
Device or magnetic field monitor sensor, believe for continuously monitoring each fracturing section difference pressure break time pressure break destination layer excitation of electromagnetic wave
Number response electric field signal or magnetic field signal.
Preferably, emitting different frequency parallel or perpendicular to horizontal well direction set distance extroversion pressure break destination layer
Excitation of electromagnetic wave signal after further include:
Record the corresponding current strength of different frequency excitation of electromagnetic wave signal.
Preferably, based in the electric field signal or magnetic field signal and fracturing process before pressure break electric field signal or magnetic field
Signal obtains residual error electric field or the residual error magnetic field of each monitoring point, specifically includes:
Acquisition monitoring point different frequency excitation of electromagnetic wave in the electric field signal or magnetic field signal and fracturing process before pressure break
Signal corresponds to electric field signal or magnetic field signal, according to the corresponding current strength of different frequency excitation of electromagnetic wave signal to fracturing process
Middle electric field signal or magnetic field signal normalization, and monitoring point is obtained according to electric field signal of the monitoring point before pressure break or magnetic field signal
Residual error electric field or residual error magnetic field.
Preferably, obtaining electric field residual error degree or magnetic field residual error degree or resistance according to the residual error electric field or residual error magnetic field
Rate residual error degree specifically includes:
Frequency-residual error electric field or frequency-residual error magnetic field or frequency-residual error are obtained based on the residual error electric field or residual error magnetic field
Resistivity relation, to the negative anomaly in the frequency-residual error electric field or frequency-residual error magnetic field or frequency-residual error resistivity relation
Integral Processing is carried out, electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and corresponding single order second order airspace arrow are obtained
Measure difference and a second order time domain vector difference.
Preferably, electric field or magnetic field residual error degree or resistivity residual error degree and its single order second order based on each monitoring point
Airspace vector difference and a second order time domain vector difference obtain geometry areal extent, main seam of the fracturing fracture in space and net seam feature
Fracturing fluid crossfire is evaluated between evaluation, section, is specifically included:
According to the electric field residual error degree of each monitoring point of all fracturing sections or magnetic field residual error degree or resistivity residual error degree and correspondence
Single order second order airspace vector difference and a second order time domain vector difference obtain plane equivalence, according to the plane isopleth
Geometry areal extent of the figure to fracturing fracture in space is monitored, and including seam length, slit width and stitches high monitoring；
Feature is changed with time according to electric field or magnetic field signal to judge that fracturing fracture stitches net for main large fracture or uniformly；
By monitoring the fracturing section electromagnetic field data near current fracturing section, to judge to press in current fracturing section work progress
Split liquid whether water conservancy diversion to neighbouring fracturing section seam net.
A kind of four-dimensional electromagnetic monitoring system in real time of oil gas pressure break, comprising:
Excitation of electromagnetic wave source, for emitting not parallel or perpendicular to horizontal well direction set distance extroversion pressure break destination layer
The excitation of electromagnetic wave signal of same frequency；
Electric field or magnetic field signal monitoring device lead several monitoring points in a well monitoring range for obtaining pressure break and are in pressure break
Electric field signal or magnetic field signal in preceding electric field signal or magnetic field signal and fracturing process；
Signal processor, for solving based on the electric field letter in the electric field signal or magnetic field signal and fracturing process before pressure break
Number or magnetic field signal obtain the residual error electric field or residual error magnetic field or residual error resistivity of each monitoring point, and according to the residual error electric field
Or residual error magnetic field or residual error resistivity obtain electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and its corresponding single order
Second order airspace vector difference and a second order time domain vector difference；Residual error electric field, residual error magnetic field, residual error electricity based on each monitoring point
Resistance rate and its time-domain difference and electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and corresponding single order second order airspace
Vector difference and a second order time domain vector difference obtain fracturing fracture and comment in the geometry areal extent in space, main seam net seam feature
Fracturing fluid crossfire is evaluated between valence, section.
Preferably, the electric field or magnetic field signal monitoring device include several electric field monitoring sensors or magnetic field monitoring
Sensor, monitoring receiving host, the electric field monitoring sensor or magnetic field monitoring sensor arrangement lead a well prison in the pressure break
It surveys in range, and electric field monitoring sensor or magnetic field monitoring sensor connect the monitoring receiving host, the monitoring connects
Host is received for continuously monitoring the electric field that each fracturing section difference pressure break time pressure break destination layer responds excitation of electromagnetic wave signal
Signal or magnetic field signal.
Preferably, the excitation of electromagnetic wave source includes excitation of electromagnetic wave signal excitation source and electric dipole.
The four-dimensional electromagnetic monitoring method and system in real time of a kind of oil gas pressure break provided in an embodiment of the present invention, by emitting electromagnetism
Wave excitation signal and the electric field or magnetic field signal for receiving feedback simultaneously, utilize the change of electric field or magnetic field signal on room and time
Change feature to monitor fracturing section transverse direction, genesis analysis crack areal extent；Oil gas pressure break ideal effect is formed after pressing crack construction
Uniform seam net, analyzes FRACTURE CHARACTERISTICS using continuous observation acquisition electric field or magnetic field signal versus time curve feature,
May infer that pressure break is formed by crack is main large fracture or ideal uniformly seam net；By observing near current fracturing section
Fracturing section electromagnetic field data mutation analysis and judge current fracturing section fracturing fluid whether water conservancy diversion enter near fracturing section.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the real-time electromagnetic monitoring method flow diagram of oil gas pressure break of the present invention；
Fig. 2 is the main large fracture of the present invention and uniformly stitches net monitoring curve characteristic pattern；
Fig. 3 is that single-point of the present invention monitors difference electric field percentage curve figure；
Fig. 4 is that the real-time electromagnetic monitoring system of oil gas pressure break of the present invention implements block diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, showing a kind of four-dimensional electromagnetic monitoring method in real time of oil gas pressure break in figure, comprising:
In each fracturing section work progress, pressed parallel or perpendicular to horizontal well direction certain (set distance) distance is export-oriented
The excitation of electromagnetic wave signal of destination layer transmitting different frequency is split, acquisition pressure break leads several monitoring points in a well monitoring range and is in pressure
The electric field or magnetic field signal in electric field or magnetic field signal and fracturing process before splitting；I.e. before the construction of each fracturing section starts, lead to
The excitation of electromagnetic wave signal for crossing emission source transmitting different frequency, passes through the electric field or magnetic field signal on each monitoring point of continuous observation
Feedback data, until this section of fracturing section construction terminates；Electric field or magnetic field signal using feedback be can use in room and time
On variation characteristic come monitor fracturing section laterally, genesis analysis crack areal extent.
Specifically, based in the electric field or magnetic field signal and fracturing process before pressure break electric field or magnetic field signal obtain it is each
The residual error electric field of monitoring point or residual error magnetic field, and according to the residual error electric field or residual error magnetic field obtain electric field or magnetic field residual error degree or
Resistivity residual error degree and its single order second order airspace vector difference (i.e. single order airspace vector difference and second order airspace vector difference) and
One second order time domain vector difference (i.e. single order time domain vector difference and second order time domain vector difference)；To it is different during pressing crack construction when
Between the electric field that monitors or magnetic field signal carry out Difference Calculation on the basis of electric field surveyed before pressure break or magnetic field signal, seek residual error
Electric field or residual error magnetic field, the pressure break that can analyze each monitoring station in monitoring range involve situation；Utilize each monitoring point residual error
Electric field or the negative anomaly in residual error magnetic field integral, obtain electric field or magnetic field residual error degree or resistivity residual error degree and its single order second order airspace
Vector difference and a second order time domain vector difference, can analyze single monitoring point fracturing effect；
Electric field or magnetic field residual error degree or resistivity residual error degree and its single order second order airspace phasor difference based on each monitoring point
Divide and a second order time domain vector difference obtains fracturing fracture in the areal extent and fracturing effect in space；Using normalization electric field or
The curve that magnetic field is changed over time in single monitoring station, it can be determined that single hop pressure-break net feature judges whether to form uniform seam
Net or several main large fractures, evaluate fracturing effect, electric field or magnetic field residual error degree or resistivity residual error degree is bigger, and fracturing effect is got over
It is good, on the contrary fracturing effect is poor.Current fracturing section is judged by observing the fracturing section electromagnetic field data variation near current fracturing section
Whether water conservancy diversion enters neighbouring fracturing section to fracturing fluid.
Specifically, in the present embodiment, before each fracturing section construction further include:
It is including several dominant frequency and harmonic wave parallel or perpendicular to horizontal well direction certain distance extroversion pressure break target layer arrangement
Signal emitting-source, the signal emitting-source includes excitation of electromagnetic wave signal excitation source and electric dipole (electrode A and B).
In the present embodiment, it obtains pressure break and leads several monitoring points in a well monitoring range and be in the electric field before pressure break or magnetic field
Electric field or magnetic field signal in signal and fracturing process, specifically include:
It is led in the pressure break and arranges several monitoring points in well monitoring range, each monitoring point is provided with electric field (or magnetic field)
Sensor is monitored, excitation of electromagnetic wave signal is responded for continuously monitoring each fracturing section difference pressure break time pressure break destination layer
Electric field or magnetic field signal.
In the present embodiment, emitting different frequencies parallel or perpendicular to horizontal well direction certain distance extroversion pressure break destination layer
After the excitation of electromagnetic wave signal of rate further include:
The corresponding current strength of different frequency excitation of electromagnetic wave signal is recorded, can and utilize emission stop signal electricity obtained
Intensity of flow normalizes electric field or magnetic field signal, and the electric field or magnetic field signal intensity after different pressure break period normalization are depicted as
Frequency-resistivity curve.
Specifically, based in the electric field or magnetic field signal and fracturing process before pressure break electric field or magnetic field signal obtain it is each
The residual error electric field of monitoring point or residual error magnetic field, specifically include:
Acquisition monitoring point different frequency excitation of electromagnetic wave signal in the electric field or magnetic field signal and fracturing process before pressure break
Corresponding electric field or magnetic field signal, according to the corresponding current strength of different frequency excitation of electromagnetic wave signal to electric field in fracturing process or
Magnetic field signal normalization, and on the basis of the electric field or magnetic field signal surveyed before pressure break, different time during pressing crack construction is supervised
The electric field or magnetic field signal that measure carry out Difference Calculation, obtain residual error electric field or the residual error magnetic field of monitoring point, with residual error electric field or
Residual error magnetic field mapping frequency-residual error electric field or residual error field curve utilize each monitoring point residual error electric field or residual error field curve point
Analysis infers that every section of fracturing fracture laterally involves range.
Specifically, in the present embodiment, the process for calculating residual error electric field or residual error magnetic field is described as follows:
The potential difference data that monitoring receiver obtains different pressure break stage each monitoring points first calculates electric field, Eif=Δ
Vif/(IifMN), H is acquired using bar magnetif, wherein i indicates monitoring location, and f indicates frequency, and MN indicates the distance of monitoring point.
Using before pressure break and fracturing process in each monitoring point potential difference data, calculate residual error electric field or residual error magnetic field or
Residual error resistivity, formula are as follows:
Wherein t0Before indicating pressure break, t indicates a certain moment in fracturing process, as shown in Fig. 2, monitoring difference electric field for single-point
Or magnetic field signal percentage curve figure.
In the present embodiment, electric field or magnetic field residual error degree are obtained according to the residual error electric field or residual error magnetic field or resistivity is residual
Margin and its single order second order airspace vector difference and a second order time domain vector difference specifically include:
Frequency-residual error electric field or residual error magnetic field dependence are obtained based on the residual error electric field or residual error magnetic field, to the frequency-
Negative anomaly in residual error electric field or residual error magnetic field dependence carries out Integral Processing, obtains electric field or magnetic field residual error degree or resistivity residual error
Degree and its single order second order airspace vector difference and a second order time domain vector difference.
Specifically, utilizing each monitoring with residual error electric field or residual error magnetic field mapping frequency-residual error electric field or residual error field curve
Dot frequency-residual error electric field or the analysis of residual error field curve infer that every section of fracturing fracture laterally involves range.To frequency-residual error electricity
Negative anomaly in field or residual error field curve is integrated, and the parameter-electric field or magnetic field residual error of evaluation single-point fracturing effect are formed
Degree or resistivity residual error degree and its single order second order airspace vector difference and a second order time domain vector difference.
It is as follows to calculate electric field, magnetic field residual error degree, resistivity residual error degree formula difference:
Above formula indicates the electric field or magnetic field residual error degree or resistivity residual error degree of i-th monitoring point t moment in fracturing process.
Specifically, in the present embodiment, electric field or magnetic field residual error degree or resistivity residual error degree based on each monitoring point and
Its single order second order airspace vector difference and a second order time domain vector difference obtain fracturing fracture in the areal extent and pressure break in space
Effect specifically includes:
With residual error electric field or residual error magnetic field mapping frequency-residual error electric field or residual error field curve, each monitoring point residual error is utilized
Electric field or the analysis of residual error field curve infer that every section of fracturing fracture laterally involves range, including seam length, slit width and transformation volume；
By analyzing the frequency-residual error electric field or residual error field curve feature of each monitoring point, built in conjunction with according to fractured well earth-electricity model
Vertical monitoring response template obtains fracturing fracture in longitudinal thickness, and meets height；Existed using the electric field or magnetic field signal of feedback
Variation characteristic on room and time come monitor fracturing section laterally, genesis analysis crack geometry areal extent；
Planar equivalent is drawn using the electric field or magnetic field residual error degree or resistivity residual error degree of each monitoring point of all fracturing sections
Line chart, areal extent and fracturing effect of the deducibility fracturing fracture in space, electric field or magnetic field residual error degree or resistivity residual error degree
Bigger, fracturing effect is better, otherwise fracturing effect is poor；Oil gas pressure break ideal effect is the uniform seam net of formation after pressing crack construction,
Electric field versus time curve feature is obtained to analyze FRACTURE CHARACTERISTICS using continuous observation in the present embodiment, may infer that pressure break
Being formed by crack is main large fracture or uniformly stitches net.
Drawing curve graph with the variation of pressure break time using the normalization electric field or magnetic field signal of each monitoring point can sentence
Disconnected fracturing fracture feature.As shown in figure 3, solid line indicates to normalize electric field with pressure break time stepping method or magnetic field signal is gradually equal
Even reduction, it is good that this character representation destination layer forms uniformly seam net, fracturing effect；And the electric field that dotted line indicates is fast early period in pressure break
Speed reduces, and gentle in the variation of pressure break middle and later periods, this character representation destination layer forms several main large fractures, is unfavorable for reservoir hydrocarbons
Release, fracturing effect is bad.
It further include a kind of four-dimensional electromagnetic monitoring system in real time of oil gas pressure break in the present embodiment, as shown in Figure 4, comprising:
Excitation of electromagnetic wave source, for emitting not parallel or perpendicular to horizontal well direction certain distance extroversion pressure break destination layer
The excitation of electromagnetic wave signal of same frequency；
Electric field or magnetic field signal monitoring device lead several monitoring points in a well monitoring range for obtaining pressure break and are in pressure break
Electric field or magnetic field signal in preceding electric field or magnetic field signal and fracturing process；
By wireless communication transmission to pressure break command car, pressure break command car is taken for the collected electric field of sensor, magnetic field data
Carry signal processor and achievements exhibition platform.
Signal processor, for based on the electric field or magnetic field signal in the electric field or magnetic field signal and fracturing process before pressure break
Residual error electric field or the residual error magnetic field of each monitoring point are obtained, and electric field or magnetic field are obtained according to the residual error electric field or residual error magnetic field
Residual error degree or resistivity residual error degree and its single order second order airspace vector difference and a second order time domain vector difference；Based on each monitoring
The electric field or magnetic field residual error degree or resistivity residual error degree and its single order second order airspace vector difference of point and a second order time domain vector are poor
Separately win the areal extent and fracturing effect that take fracturing fracture in space.
Specifically, in the present embodiment, the electric field or magnetic field signal monitoring device include several electric fields (or magnetic field) prison
Sensor and monitoring receiving host are surveyed, electric field (or magnetic field) the monitoring sensor arrangement leads a well monitoring range in the pressure break
It is interior, and the electric field (or magnetic field) monitoring sensor connects the monitoring receiving host, the monitoring receiving host is for continuous
Monitor electric field or magnetic field signal that each fracturing section difference pressure break time pressure break destination layer responds excitation of electromagnetic wave signal.
Specifically, in the present embodiment, the excitation of electromagnetic wave source includes excitation of electromagnetic wave signal excitation source and eelctric dipole
Son.
In conclusion a kind of four-dimensional electromagnetic monitoring method and system in real time of oil gas pressure break provided in an embodiment of the present invention, leads to
Cross transmitting excitation of electromagnetic wave signal and while receive the electric field or magnetic field signal of feedback, using electric field or magnetic field signal space with
Temporal variation characteristic come monitor fracturing section laterally, genesis analysis crack areal extent；Oil gas pressure break ideal effect is pressure break
Uniform seam net is formed after construction, obtains electric field or magnetic field signal versus time curve feature using continuous observation to analyze
FRACTURE CHARACTERISTICS may infer that pressure break is formed by crack and is main large fracture or uniformly stitches net；Can be efficient, economical, have
The pressure break to petroleum resources of effect carries out real-time monitoring, obtains electric field, the magnetic field, resistance of pressure break target area four-dimensional (x, y, z, t)
Rate parameter carries out evaluation of Fracturing Effect on Compact Sandstone to each fracturing section of fractured well, effectively fracturing work is instructed to construct, optimizes drilling parameter,
It greatly reduces Fracturing Monitoring cost, improve Fracturing Monitoring effect, so that single well yield is improved, to China's petrol resources exploitation
The raising of well yield plays an important role in process.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit can be or may not be physical unit, i.e.,
It can be located in one place, or may be distributed over multiple network units.Portion therein can be selected according to the actual needs
Point or whole module achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creative labor
In the case of, it can it understands and implements.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
It states technical solution substantially or says that the part that contributes to existing technology can be embodied in the form of software products, the meter
Calculation machine software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions
With so that computer equipment (can be personal computer, server or the network equipment etc.) execute each embodiment or
Method described in certain parts of embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And
These modifications or substitutions, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. a kind of four-dimensional electromagnetic monitoring method in real time of oil gas pressure break characterized by comprising
In each fracturing section work progress, sent out simultaneously parallel or perpendicular to horizontal well direction set distance extroversion pressure break destination layer
It penetrates the excitation of electromagnetic wave signal comprising different frequency, obtains pressure break and lead before several monitoring points are in pressure break in a well monitoring range
Electric field signal or magnetic field signal in electric field signal or magnetic field signal and fracturing process；
Based in the electric field signal or magnetic field signal and fracturing process before pressure break electric field signal or magnetic field signal obtain each prison
The residual error electric field of measuring point or residual error magnetic field or residual error resistivity, and according to the residual error electric field or residual error magnetic field or residual error resistivity
Obtain electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and its corresponding single order second order airspace vector difference and one or two
Rank time domain vector difference；
Residual error electric field, residual error magnetic field, residual error resistivity and corresponding time-domain difference and electric field residual error based on each monitoring point
Degree or magnetic field residual error degree or resistivity residual error degree and corresponding single order second order airspace vector difference and a second order time domain vector difference
It obtains geometry areal extent, main seam of the fracturing fracture in space and nets fracturing fluid crossfire evaluation between seam characteristic evaluating, section.
2. the four-dimensional electromagnetic monitoring method in real time of oil gas pressure break according to claim 1, which is characterized in that each fracturing section is applied
Before work further include:
It is including the letter of several dominant frequency and harmonic wave parallel or perpendicular to horizontal well direction set distance extroversion pressure break target layer arrangement
Number emission source, the signal emitting-source includes excitation of electromagnetic wave signal excitation source and electric dipole.
3. the four-dimensional electromagnetic monitoring method in real time of oil gas pressure break according to claim 1, which is characterized in that each fracturing section is applied
Before work further include:
Led in the pressure break and arrange several monitoring points in well monitoring range, each monitoring point be provided with electric field monitoring sensor or
Magnetic field monitors sensor, rings for continuously monitoring each fracturing section difference pressure break time pressure break destination layer to excitation of electromagnetic wave signal
The electric field signal or magnetic field signal answered.
4. the four-dimensional electromagnetic monitoring method in real time of oil gas pressure break according to claim 1, which is characterized in that parallel or vertical
After the excitation of electromagnetic wave signal of horizontal well direction set distance extroversion pressure break destination layer transmitting different frequency further include:
Record the corresponding current strength of different frequency excitation of electromagnetic wave signal.
5. the four-dimensional electromagnetic monitoring method in real time of oil gas pressure break according to claim 4, which is characterized in that before pressure break
Electric field signal or magnetic field signal in electric field signal or magnetic field signal and fracturing process obtain each monitoring point residual error electric field or
Residual error magnetic field or residual error resistivity, specifically include:
Acquisition monitoring point different frequency excitation of electromagnetic wave signal in the electric field signal or magnetic field signal and fracturing process before pressure break
Corresponding electric field signal or magnetic field signal, according to the corresponding current strength of different frequency excitation of electromagnetic wave signal to electric in fracturing process
Field signal or magnetic field signal normalization, and the residual of monitoring point is obtained according to electric field signal of the monitoring point before pressure break or magnetic field signal
Poor electric field or residual error magnetic field or residual error resistivity.
6. the four-dimensional electromagnetic monitoring method in real time of oil gas pressure break according to claim 1, which is characterized in that according to the residual error
Electric field or residual error magnetic field obtain electric field residual error degree or magnetic field residual error degree or resistivity residual error degree specifically includes:
Frequency-residual error electric field or frequency-residual error magnetic field or frequency-residual error resistance are obtained based on the residual error electric field or residual error magnetic field
The relationship of rate, to the negative anomaly in the frequency-residual error electric field or frequency-residual error magnetic field or frequency-residual error resistivity relation into
Row Integral Processing obtains electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and corresponding single order second order airspace vector
Difference and a second order time domain vector difference.
7. the four-dimensional electromagnetic monitoring method in real time of oil gas pressure break according to claim 6, which is characterized in that be based on each monitoring
The electric field or magnetic field residual error degree or resistivity residual error degree and its single order second order airspace vector difference of point and a second order time domain vector are poor
It separately wins and geometry areal extent, main seam of the fracturing fracture in space is taken to net fracturing fluid crossfire evaluation between seam characteristic evaluating, section, it is specific to wrap
It includes:
According to the electric field residual error degree of each monitoring point of all fracturing sections or magnetic field residual error degree or resistivity residual error degree and corresponding one
Rank second order airspace vector difference and a second order time domain vector difference obtain plane equivalence, according to the plane equivalence pair
Geometry areal extent of the fracturing fracture in space is monitored, and including seam length, slit width and stitches high monitoring；
Feature is changed with time according to electric field or magnetic field signal to judge that fracturing fracture stitches net for main large fracture or uniformly；
By monitoring the fracturing section electromagnetic field data near current fracturing section, to judge fracturing fluid in current fracturing section work progress
Whether water conservancy diversion to neighbouring fracturing section seam net.
8. a kind of four-dimensional electromagnetic monitoring system in real time of oil gas pressure break characterized by comprising
Excitation of electromagnetic wave source, for emitting different frequencies parallel or perpendicular to horizontal well direction set distance extroversion pressure break destination layer
The excitation of electromagnetic wave signal of rate；
Electric field or magnetic field signal monitoring device are led before several monitoring points are in pressure break in a well monitoring range for obtaining pressure break
Electric field signal or magnetic field signal in electric field signal or magnetic field signal and fracturing process；
Signal processor, for solve based in the electric field signal or magnetic field signal and fracturing process before pressure break electric field signal or
Magnetic field signal obtains the residual error electric field or residual error magnetic field or residual error resistivity of each monitoring point, and according to the residual error electric field or residual
Poor magnetic field or residual error resistivity obtain electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and its corresponding single order second order
Airspace vector difference and a second order time domain vector difference；Residual error electric field, residual error magnetic field based on each monitoring point, residual error resistivity
And its time-domain difference and electric field residual error degree or magnetic field residual error degree or resistivity residual error degree and corresponding single order second order airspace vector
Difference and a second order time domain vector difference obtain geometry areal extent, main seam of the fracturing fracture in space and net seam characteristic evaluating, section
Between fracturing fluid crossfire evaluate.
9. the four-dimensional electromagnetic monitoring system in real time of oil gas pressure break according to claim 8, which is characterized in that the electric field or magnetic
Field signal monitoring device includes several electric field monitoring sensors or magnetic field monitoring sensor, monitoring receiving host, the electric field prison
Survey sensor or magnetic field monitoring sensor arrangement led in a well monitoring range in the pressure break, and the electric field monitoring sensor or
Magnetic field monitors sensor and connects the monitoring receiving host, and the monitoring receiving host is different for continuously monitoring each fracturing section
The electric field signal or magnetic field signal that pressure break time pressure break destination layer responds excitation of electromagnetic wave signal.
10. the four-dimensional electromagnetic monitoring system in real time of oil gas pressure break according to claim 8, which is characterized in that the electromagnetic wave
Driving source includes excitation of electromagnetic wave signal excitation source and electric dipole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549356.9A CN108983298B (en) | 2018-05-31 | 2018-05-31 | Oil-gas fracturing four-dimensional real-time electromagnetic monitoring method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549356.9A CN108983298B (en) | 2018-05-31 | 2018-05-31 | Oil-gas fracturing four-dimensional real-time electromagnetic monitoring method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108983298A true CN108983298A (en) | 2018-12-11 |
| CN108983298B CN108983298B (en) | 2020-04-07 |
Family
ID=64542814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810549356.9A Active CN108983298B (en) | 2018-05-31 | 2018-05-31 | Oil-gas fracturing four-dimensional real-time electromagnetic monitoring method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108983298B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080740A (en) * | 2019-05-21 | 2019-08-02 | 中煤科工集团西安研究院有限公司 | A kind of method and system detecting down-hole coal bed gas fracturing effect |
| CN110501746A (en) * | 2019-08-19 | 2019-11-26 | 孙启隆 | Roller three-dimensional controllable source electrical method monitoring and evaluation drilling fracturing method |
| CN110865245A (en) * | 2019-10-12 | 2020-03-06 | 陈国能 | Single-hole monitoring system and method for fracture diffusion electric field intensity |
| CN111123369A (en) * | 2020-01-06 | 2020-05-08 | 湖南省有色地质勘查局二四七队 | Geological exploration wave detection method, device, equipment and medium |
| CN111948720A (en) * | 2020-07-15 | 2020-11-17 | 中南大学 | Underground conductor antenna effect fracturing monitoring method |
| CN112302636A (en) * | 2019-07-26 | 2021-02-02 | 中国石油天然气集团有限公司 | Hydraulic fracturing monitoring method and device |
| CN114459912A (en) * | 2022-01-24 | 2022-05-10 | 湖南继善高科技有限公司 | Method and system for determining volume of oil-gas fracturing fracture |
| CN114459911A (en) * | 2022-01-24 | 2022-05-10 | 湖南继善高科技有限公司 | Direction interpretation method for oil and gas fracturing fracture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104471443A (en) * | 2012-05-17 | 2015-03-25 | 深层成像技术有限公司 | A system and method using near and far field ulf and elf interferometry synthetic aperture radar for subsurface imaging |
| CN104737035A (en) * | 2013-02-28 | 2015-06-24 | 雪佛龙美国公司 | System and method for detecting a fracture in a rock formation using an electromagnetic source |
| CN105649617A (en) * | 2016-01-15 | 2016-06-08 | 中国石油大学(北京) | Experimental method for monitoring expansion process of hydraulic fracture through electromagnetic signals |
| CN105840185A (en) * | 2016-03-30 | 2016-08-10 | 大港油田集团有限责任公司 | Stable electric field horizontal well fracture crack monitoring method |
| WO2017155534A1 (en) * | 2016-03-10 | 2017-09-14 | Halliburton Energy Services, Inc. | Dip-effect correction of multicomponent logging data |
-
2018
- 2018-05-31 CN CN201810549356.9A patent/CN108983298B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104471443A (en) * | 2012-05-17 | 2015-03-25 | 深层成像技术有限公司 | A system and method using near and far field ulf and elf interferometry synthetic aperture radar for subsurface imaging |
| CN104737035A (en) * | 2013-02-28 | 2015-06-24 | 雪佛龙美国公司 | System and method for detecting a fracture in a rock formation using an electromagnetic source |
| CN105649617A (en) * | 2016-01-15 | 2016-06-08 | 中国石油大学(北京) | Experimental method for monitoring expansion process of hydraulic fracture through electromagnetic signals |
| WO2017155534A1 (en) * | 2016-03-10 | 2017-09-14 | Halliburton Energy Services, Inc. | Dip-effect correction of multicomponent logging data |
| CN105840185A (en) * | 2016-03-30 | 2016-08-10 | 大港油田集团有限责任公司 | Stable electric field horizontal well fracture crack monitoring method |
Non-Patent Citations (1)
| Title |
|---|
| 王岳飞: "基于瞬变电磁法探测煤体内水力压裂流场的运动规律", 《山西煤炭》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080740A (en) * | 2019-05-21 | 2019-08-02 | 中煤科工集团西安研究院有限公司 | A kind of method and system detecting down-hole coal bed gas fracturing effect |
| CN110080740B (en) * | 2019-05-21 | 2021-08-17 | 中煤科工集团西安研究院有限公司 | Method and system for detecting hydraulic fracturing effect of underground coal bed gas |
| CN112302636A (en) * | 2019-07-26 | 2021-02-02 | 中国石油天然气集团有限公司 | Hydraulic fracturing monitoring method and device |
| CN110501746A (en) * | 2019-08-19 | 2019-11-26 | 孙启隆 | Roller three-dimensional controllable source electrical method monitoring and evaluation drilling fracturing method |
| CN110865245A (en) * | 2019-10-12 | 2020-03-06 | 陈国能 | Single-hole monitoring system and method for fracture diffusion electric field intensity |
| CN111123369A (en) * | 2020-01-06 | 2020-05-08 | 湖南省有色地质勘查局二四七队 | Geological exploration wave detection method, device, equipment and medium |
| CN111123369B (en) * | 2020-01-06 | 2021-11-30 | 湖南省有色地质勘查局二四七队 | Geological exploration wave detection method, device, equipment and medium |
| CN111948720A (en) * | 2020-07-15 | 2020-11-17 | 中南大学 | Underground conductor antenna effect fracturing monitoring method |
| CN111948720B (en) * | 2020-07-15 | 2021-09-28 | 中南大学 | Underground conductor antenna effect fracturing monitoring method |
| CN114459912A (en) * | 2022-01-24 | 2022-05-10 | 湖南继善高科技有限公司 | Method and system for determining volume of oil-gas fracturing fracture |
| CN114459911A (en) * | 2022-01-24 | 2022-05-10 | 湖南继善高科技有限公司 | Direction interpretation method for oil and gas fracturing fracture |
| CN114459911B (en) * | 2022-01-24 | 2023-06-20 | 湖南继善高科技有限公司 | Direction interpretation method for oil-gas fracturing cracks |
| CN114459912B (en) * | 2022-01-24 | 2023-08-08 | 湖南继善高科技有限公司 | Method and system for determining volume of oil and gas fracturing cracks |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108983298B (en) | 2020-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108983298A (en) | A kind of four-dimensional electromagnetic monitoring method and system in real time of oil gas pressure break | |
| US10942293B2 (en) | Rock physics based method of integrated subsurface reservoir characterization for use in optimized stimulation design of horizontal wells | |
| AU2017230727B2 (en) | Hydraulic fracture monitoring by low-frequency DAS | |
| CN108646306A (en) | A kind of oil gas fracturing fracture four-dimensional geometry feature method of real-time and system | |
| US9268050B2 (en) | Determining a confidence value for a fracture plane | |
| CN106526669B (en) | A kind of Seismic Reservoir Prediction method of shale oil-gas reservoir | |
| CN104879103B (en) | A kind of seperated layer water injection effect analysis method | |
| US8490693B2 (en) | Determining fracture orientation using wellbore acoustic radial profiles | |
| US8567496B2 (en) | System and method for managing a subterranean formation | |
| Jin et al. | Machine learning-based fracture-hit detection algorithm using LFDAS signal | |
| CN108873081A (en) | A kind of main seam net of oil gas pressure break stitches four-dimensional electromagnetism method of real-time and system | |
| US11512573B2 (en) | Stimulation using fiber-derived information and fracturing modeling | |
| CN106054239B (en) | A kind of microseism Fracturing Monitoring observation procedure | |
| US20180112525A1 (en) | Method of Determination of Parameters of the Fracture Near Wellbore Zone Filled with Electrically Conductive Proppant Using Electromagnetic Logging | |
| CN104950327B (en) | The method for determining the position of the wave detector of ground micro-seismic observation system | |
| KR101591430B1 (en) | Method of measuring subsurface structure and method of drilling shale gas using the same | |
| Neuhaus et al. | Integrated microseismic monitoring for field optimization in the Marcellus Shale-A case study | |
| CN109061743A (en) | A kind of oil gas pressure break four-dimension electromagnetism multi -components method of real-time and system | |
| WO2016114896A1 (en) | Hydraulic fracture permeability characterization from electromagnetic measurements | |
| Wang et al. | Observations and modeling of fiber optic strain on hydraulic fracture height growth in hydraulic fracturing test site 2 (HFTS-2) | |
| Gurjao et al. | Modeling of Distributed Strain Sensing (DSS) and Distributed Acoustic Sensing (DAS) Incorporating Hydraulic and Natural Fractures Interaction | |
| CN108868751B (en) | Four-dimensional electromagnetic monitoring method and system in real time is influenced between a kind of oil gas fracturing section | |
| Cao et al. | A novel integrated DFN-fracturing-reservoir model: a case study | |
| US10157167B2 (en) | Method for determining triaxial conductivity with arbitrary orientation using multiaxial electromagnetic measurements | |
| CN102486089A (en) | Isoline-based three-dimensional geologic structure map remodeling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210122 Address after: No. 2001, Longxiang Avenue, Longcheng street, Longgang District, Shenzhen, Guangdong 518172 Patentee after: Chinese University of Hong Kong (Shenzhen) Address before: Jishan hi tech Industrial Park, No.339, bachelor Road, Yuelu District, Changsha City, Hunan Province, 410208 Patentee before: HUNAN GEOSUN HI-TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210323 Address after: Office 604, 605, 606, administration building, 2001 Longxiang Avenue, Longcheng street, Longgang District, Shenzhen, Guangdong 518172 Patentee after: Institute of urban underground space and energy Chinese University of Hong Kong (Shenzhen) Address before: No. 2001, Longxiang Avenue, Longcheng street, Longgang District, Shenzhen, Guangdong 518172 Patentee before: Chinese University of Hong Kong (Shenzhen) |