CN109184661A - The monitoring method and its system of identification are set for horizontal well with bottom water reservoir high yield liquid level - Google Patents
The monitoring method and its system of identification are set for horizontal well with bottom water reservoir high yield liquid level Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The present invention relates to a kind of monitoring methods and its system that identification is set for horizontal well with bottom water reservoir high yield liquid level, this method following steps: step 1): the measurement certain level well bottom pressure value interior for a period of time in closing well obtains the pressure value of real standard well and the variation relation of time；Step 2): judge whether the pressure value of real standard well is equal with the variation relation of time with preset relation, if equal, enter step 4), otherwise enter step 3)；Step 3): 4) the corresponding pressure interpretation parameter of amendment preset relation enters step so that revised preset relation is equal with the variation relation of time with the pressure value of real standard well；Step 4): using the corresponding pressure interpretation parameter of preset relation as the pressure interpretation parameter of real standard well.It is more tallied with the actual situation using the horizontal well with bottom water reservoir pressure interpretation that the present invention carries out, improves the accuracy of pressure interpretation, reasonably developed for horizontal well, the formulation of well stimulation provides powerful guarantee.
Description
Technical field
The present invention relates to a kind of monitoring methods and its system that identification is set for horizontal well with bottom water reservoir high yield liquid level, belong to
The Dynamic Monitoring field of oil field development.
Background technique
Currently, horizontal well has become the important means for improving Development Response of Oilfield, but in actual production, many levels
Well only has part of horizontal section and produces liquid: for example domestic many horizontal well with bottom water reservoir are after operation in very short time, due to bottom water ridge
Into a part of horizontal segment moisture content rises to 95% or more, causes the water logging of pit shaft part；Another part horizontal segment is due to storage simultaneously
The layer reason such as heterogeneity or pollution damage are again very low to the contribution to yield degree of entire pit shaft.Therefore how Accurate Diagnosis is high
Production liquid level, which sets and do not produce liquid level, sets, and then implements the control measures such as water blockoff, acid fracturing, has to horizontal well development effect is improved
Significance.
It is still used in the prior art without a kind of diagnosing and identifying method set suitable for horizontal well with bottom water reservoir high yield liquid level
Existing usual pressure means of interpretation will lead to result distortion.
Summary of the invention
In view of the above-mentioned problems, setting identification for horizontal well with bottom water reservoir high yield liquid level the object of the present invention is to provide a kind of
Monitoring method and its system can effectively carry out identification and diagnosis that horizontal well with bottom water reservoir high yield liquid level is set.
To achieve the above object, the present invention takes following technical scheme:
In a first aspect, the present invention provides a kind of monitoring method that identification is set for horizontal well with bottom water reservoir high yield liquid level, packet
Include following steps:
Step 1): the measurement certain level well bottom pressure value interior for a period of time in closing well obtains the pressure of real standard well
The variation relation of force value and time；
Step 2): judging whether the pressure value of real standard well is equal with the variation relation of time with preset relation, if
It is equal, then it enters step 4), otherwise enters step 3)；
Step 3): the corresponding pressure interpretation parameter of amendment preset relation, so that revised preset relation and real standard
The pressure value of well and the variation relation of time are equal, enter step 4)；
Step 4): using the corresponding pressure interpretation parameter of preset relation as the pressure interpretation parameter of real standard well.
Further, pressure interpretation parameter includes horizontal production section number of segment, respectively produces fragment position, respectively grow segment length, seep
Saturating rate, system compressibility and core intersection.
Further, the formula that preset relation and pressure interpretation parameter meet are as follows:
In formula, Δ p is bottom hole pressure difference, units MPa；P is horizontal well pressure, units MPa；piIt is single for original formation pressure
Position MPa；khFor horizontal direction in-place permeability, unit 10-3μm2；kvFor vertical in-place permeability, unit 10-3μm2；For hole
Degree, zero dimension；CtFor system compressibility, units MPa-1；ηhFor horizontal direction piezometric conductivity, unit 10-3μm2·MPa/
(mPa·s)；ηvFor vertical piezometric conductivity, unit 10-3μm2·MPa/(mPa·s)；Q is horizontal well yield, unit m3/d；
qwiThe yield of section, unit m are produced for i-th3/d；L is production segment length, unit m；LwiThe length of section, unit are produced for i-th
m；rwFor well radius, unit m；Gx, GyzSource function for x, on the direction yz；(xwi, ywi, zwi) it is i-th of production section central point
Coordinate position；H is core intersection, unit m；T, τ is time, unit s, GxIndicate horizontal column source parallel, horizontal well axial direction
Source function is GyzIndicate the source function of horizontal column source vertical-horizontal well axial direction.
Further, the variation relation of pressure value and time include the double logarithmic curve relationship and pressure of pressure difference and time
The double logarithmic curve relationship of power difference and time relationship derivative, wherein double-log indicatrix is to draw under log-log coordinate system
Curve, log-log coordinate is that the unit length of two reference axis is all plane coordinate system after Logarithmic calculation.
Further, the corresponding pressure interpretation parameter of step 3) the amendment preset relation, detailed process are as follows:
The preset relation uses double-log indicatrix, closes including the double logarithmic curve of dimensionless pressure and nondimensional time
The double logarithmic curve of system and dimensionless pressure derivative and nondimensional time；
When the pressure value of real standard well and the unequal relationship of time and preset relation, i.e. two double logarithmic curves are not
When can be overlapped, preset relation curve is adjusted, is overlapped it with real standard well relation curve, due to preset relation corresponding pressure solution
Parameter is released, this process is amendment pressure interpretation parameter.
Second aspect, the present invention provide a kind of monitoring system that identification is set for horizontal well with bottom water reservoir high yield liquid level, should
System includes horizontal well pressure measuring unit, judging unit, pressure interpretation parameter processing unit and dynamic monitoring unit；It is described
Horizontal well pressure measuring unit is used to measure certain horizontal well bottom pressure value interior for a period of time in closing well, obtains real standard well
The variation relation of pressure value and time；The judging unit is used to judge the pressure dependence and preset relation of real standard well；Institute
Pressure interpretation parameter processing unit is stated for handling the judging result of the judging unit, if the judging unit is sentenced
Disconnected result is that actual pressure relation value is equal with preset relation value, then makees the corresponding pressure interpretation parameter of the preset relation value
For the pressure interpretation parameter of real standard well, if the result that the judging unit judges be it is unequal, correct above-mentioned default
The corresponding pressure interpretation parameter of relationship；The dynamic monitoring unit is used to handle according to through the pressure interpretation parameter processing unit
The pressure interpretation parameter of obtained real standard well analyzes the high yield liquid position and each position of the horizontal well different level section
Production status.
Further, which further includes pressure interpretation parameters revision unit, for the knot when judging unit judgement
When fruit is actual pressure relation value and unequal preset relation value, amendment adjusts the corresponding pressure interpretation parameter of the preset relation,
Until it is equal, when the preset relation value after amendment adjusts pressure interpretation parameter is equal with actual pressure relation value, then will
The corresponding one group of pressure interpretation parameter of the preset relation value is supplied to the dynamic as the pressure interpretation parameter of real standard well
Monitoring unit.
Further, which further includes storage unit, and the storage unit is for storing pressure interpretation model, i.e., default
Relationship and corresponding pressure interpretation parameter, so as to the judging unit preset relation and the horizontal well pressure measuring unit accordingly
It measures obtained actual pressure relationship and is compared judgement.
The invention adopts the above technical scheme, which has the following advantages: 1, the bottom water reservoir carried out using the present invention
Horizontal well pressure explanation more tallies with the actual situation, and improves the accuracy of pressure interpretation, reasonably develops for horizontal well, increases production and arrange
The formulation applied provides powerful guarantee.2, the present invention proposes the monitoring method set for horizontal well with bottom water reservoir high yield liquid level, gives
The new parameter of horizontal well pressure explanation is gone out, i.e., effective number of segment for producing liquid section and each effective section of position overcome routine
Method can not accurate characterization horizontal well actual complex mobility status, can not directly be diagnosed to be the deficiency at high yield liquid position, Ke Yizhi
The high yield liquid position for being effectively diagnosed to be real standard well is seen, to propose that the improvement such as targeted water blockoff and acid fracturing are arranged
It applies, it is convenient and practical, it is easier to promote.
Detailed description of the invention
Fig. 1 is the monitoring method flow diagram that identification is set for horizontal well with bottom water reservoir high yield liquid level of the invention；
Fig. 2 is the monitoring system structure diagram that identification is set for horizontal well with bottom water reservoir high yield liquid level of the invention；
Fig. 3 is the Application of Monitoring System schematic diagram that identification is set for horizontal well with bottom water reservoir high yield liquid level of the invention；
Fig. 4 is that specific embodiment of the invention horizontal well difference produces horizontal well with bottom water reservoir pressure double-log typical case under number of segment
Curved line relation schematic diagram, wherein P is pressure；P ' is the derivative of pressure curve；T is nondimensional time；
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 embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1:
As shown in Figure 1, the present invention is provided to the monitoring method that horizontal well with bottom water reservoir high yield liquid level sets identification, monitoring
Purpose is to be fitted using pressure interpretation model with actual test data, by corresponding inverse operation, obtains the pressure of actual formation
The all data of power explanation parameter, comprising the following steps:
1, measurement certain level well closing well for a period of time in bottom pressure value, obtain the pressure value of real standard well with
The variation relation of time, wherein the variation relation of pressure value and time include pressure difference and time curve and pressure difference and
The derivative curve of time curve.
What the measuring process obtained is the bottom pressure value of real standard well, how according to the bottom pressure value to obtain the water
The parameters of horizontal well, to be diagnosed to be effective production liquid position of real standard well and to be evaluated, to propose targeted
Well stimulation be the target to be realized.Since the pressure interpretation model for being used to be fitted real standard well data in the prior art is equal
It cannot consider that horizontal well with bottom water reservoir unevenly produces the influence of liquid, therefore fit the horizontal well come and explain parameter and actual parameter
It differs larger, cannot truly react the actual conditions of the well.The embodiment of the present invention is using the pressure for considering horizontal well with bottom water reservoir
Power interpretation model is fitted real standard well data, and then explains the explanation closer to horizontal well practical condition
Parameter.
2, the variation relation and preset relation of the pressure value of the obtained real standard well of judgment step 1 and time whether phase
Deng if equal, entering step 4, otherwise enter step 3.
Preset relation in this step is to consider solution calculated by the pressure interpretation model of horizontal well with bottom water reservoir and obtain
The pressure solution for the horizontal well pressure variation arrived, the pressure solution of the pressure solution and real standard well obtained in step 1 is intended
It closes, in the hope of the pressure interpretation parameter of real well.The present embodiment in the specific implementation process, can be intended by computer
It closes, i.e. comparison between the pressure value of real standard well and the variation relation of time and preset relation.
The present embodiment in the specific implementation process, can be by the pressure and the change of time for the real standard well that step 1 obtains
Change relationship is described by way of curve, and the preset relation in this step is described also by the form of curve, by two songs
Line compares, due to preset relation curve corresponding pressure interpretation model, namely the mathematics side containing several pressure interpretation parameters
Formula, so when adjusting the preset relation curve so that it is with actual relationship curve co-insides, correspondingly, the preset relation curve
Corresponding pressure interpretation parameter values are changed, this process is the process of fitting, and amendment pressure interpretation parameter
Process because by fitting obtain the preset relation curve with actual relationship curve co-insides, then the preset relation curve pair
The pressure interpretation parameter answered can serve as the pressure interpretation parameter of actual relationship curve, also just thus obtain real standard well
Pressure interpretation parameter.
The pressure interpretation model of the present embodiment considers the case where liquid is unevenly produced in horizontal well with bottom water reservoir actual production,
The production liquid number of segment of horizontal well and each position these two types new parameter for producing liquid section are introduced into the pressure interpretation model, according to the pressure
Interpretation model goes fitting to explain that real standard well data, the pressure interpretation parameter of obtained real standard well more meet actual formation
Situation, and the pressure interpretation parameter of the real standard well obtained according to this can be diagnosed to be the high yield liquid position of real standard well
And segment length is effectively produced, foundation is provided to formulate control water measure.
Following horizontal well with bottom water reservoir seepage flow mathematical formulaes is that one kind that the embodiment of the present invention proposes considers bottom water oil
It hides horizontal well difference production liquid number of segment and each pressure interpretation model for producing liquid fragment position namely preset relation and pressure interpretation parameter is full
The seepage flow mathematical formulae for having considered horizontal well with bottom water reservoir difference production liquid number of segment and each production liquid fragment position of foot, and guarantor of the invention
Shield range is without being limited thereto, and any horizontal well with bottom water reservoir difference that considers produces liquid number of segment and each pressure interpretation mould for producing liquid fragment position
Type should all be contained in protection scope of the present invention.The formula that the preset relation and pressure interpretation parameter of the embodiment of the present invention meet
Are as follows:
In formula, Δ p is bottom hole pressure difference, units MPa；P is horizontal well pressure, units MPa；piIt is single for original formation pressure
Position MPa；khFor horizontal direction in-place permeability, unit 10-3μm2；kvFor vertical in-place permeability, unit 10-3μm2；For hole
Degree, zero dimension；CtFor system compressibility, units MPa-1；ηhFor horizontal direction piezometric conductivity, unit 10-3μm2·MPa/
(mPa·s)；ηvFor vertical piezometric conductivity, unit 10-3μm2·MPa/(mPa·s)；Q is horizontal well yield, unit m3/d；
qwiThe yield of section, unit m are produced for i-th3/d；L is production segment length, unit m；LwiThe length of section, unit are produced for i-th
m；rwFor well radius, unit m；Gx, GyzSource function for x, on the direction yz；(xwi, ywi, zwi) it is i-th of production section central point
Coordinate position；H is core intersection, unit m；T, τ is time, unit s, GxIndicate horizontal column source parallel, horizontal well axial direction
Source function is GyzIndicate that the source function of horizontal column source vertical-horizontal well axial direction, x, y, z respectively represent three-dimensional space
Three different directions of x, y, z, n are since 1 to infinitely great positive integer.
According to embodiments of the present invention, which is that (primary election horizontal well parameter is basis according to primary election horizontal well parameter
The well logging of horizontal well and well completion data determine the initial parameter of pressure detecting interpretation model) to be updated to formula (1)~(3) resulting
The variation relation of pressure difference and time, the variation relation can express in graph form, the corresponding one group of pressure interpretation of the curve
Parameter, specifically: pressure solution (variation relation of bottom pressure difference and time) and respective derivative are depicted as under logarithmic coordinates
Pressure interpretation plate can be obtained in curve, the plate and observed pressure data is fitted, and then explain parameter value.
According to embodiments of the present invention, which is all kinds of horizontal well double-log indicatrix relationships, including dimensionless
The double logarithmic curve relationship and dimensionless pressure derivative of pressure and nondimensional time and the double logarithmic curve relationship of nondimensional time.
Wherein, double-log indicatrix is the curve drawn under log-log coordinate system, and log-log coordinate is the unit of two reference axis
Length is all the plane coordinate system after Logarithmic calculation.
3, the corresponding pressure interpretation parameter of amendment preset relation so that the pressure value of preset relation and real standard well and when
Between variation relation it is equal, enter step 4；
When the pressure value of real standard well and the relationship of time and preset relation are unequal namely two relation curves not
When can be overlapped, preset relation curve is adjusted, makes itself and actual relationship curve co-insides, and explain and join due to preset relation corresponding pressure
Number, so this process is exactly to correct the process of pressure interpretation parameter.
It should be noted that pressure interpretation parameter includes horizontal production section number of segment, respectively produces fragment position, respectively grows segment length
Degree, permeability, system compressibility and core intersection.Keep it equal with actual relationship curve or again in adjustment preset relation curve
When conjunction, namely when the amendment corresponding pressure interpretation parameter of preset relation curve, certain parameters be do not need modified this belong to it is existing
There is the technology being fitted in technology, details are not described herein.
4, using the corresponding pressure interpretation parameter of preset relation as the pressure interpretation parameter of real standard well, i.e., this time dynamically
The result of monitoring；
This step is judgement constantly to be compared by step 2, then constantly correct pressure interpretation parameter by step 3, most
It is obtaining eventually with actual relationship curve co-insides preset relation curves, this is adjusted or is said by amendment pressure interpretation parameter
The corresponding pressure interpretation parameter of preset relation curve is exactly the pressure interpretation parameter of real standard well.
5, the production liquid feelings of the pressure interpretation Parameter analysis of the real standard well obtained according to step 4 the horizontal well horizontal segment
Condition, each section of pollution condition more precisely instruct the exploitation with controlled level well to propose targeted well stimulation
Work.
Pressure interpretation is carried out using monitoring method of the present invention, due to considering horizontal well because of completion mode, reservoir
The production actual conditions of horizontal well with bottom water reservoir caused by the factors such as property, permeability anisotropy, improve the essence of pressure interpretation
Exactness is reasonably developed for horizontal well with bottom water reservoir, the formulation of well stimulation provides strong foundation.Moreover, according to preset relation
Comparative analysis and pressure interpretation parameters revision with the relationship of the pressure difference and time of real standard well, can not only explain
Conventional formation parameter gives the new parameter of horizontal well pressure explanation, i.e., effectively produce liquid section number of segment and it is each effectively
Section position, overcome the prior art can not accurate characterization horizontal well actual complex mobility status, can not directly be diagnosed to be high yield
The deficiency at liquid position intuitively can effectively be diagnosed to be the high yield liquid position of real standard well, to propose targetedly control
Water, acid fracturing measure have filled up pressure interpretation before this and have not considered unevenly to produce liquid, the unaccountable blank in high yield liquid position,
It is convenient and practical, it is simple and easy.
Embodiment 2:
As shown in Figure 2 and Figure 3, the present invention also provides the monitoring system for setting identification for horizontal well with bottom water reservoir high yield liquid level,
Including horizontal well pressure measuring unit 11, judging unit 12, pressure interpretation parameter processing unit 13 and dynamic monitoring unit 14.
Horizontal well pressure measuring unit 11 is used to measure the certain level well bottom pressure value interior for a period of time in closing well, obtains
To the variation relation of real standard well pressure value and time, i.e. pressure solution, wherein the variation relation of pressure value and time can wrap
Include the relationship of pressure difference and time and the derivative of pressure difference and time relationship.Horizontal well pressure measuring unit 11 can pass through one
As common reservoir pressure measuring unit or measuring device realize that the result of measurement can be supplied to judgement in several ways
Unit, such as the transmission of website orientation, transmission of network, portable unit etc., it is not limited here.
Judging unit 12 is used to judge the pressure dependence and preset relation of real standard well, according to embodiments of the present invention, should
The processing of the multilevel iudge of judging unit 12 can be realized by computer.According to embodiments of the present invention, according to preset relation
It considers horizontal well and unevenly produces the pressure solution that hydraulic coupling explains all kinds of horizontal well pressure variations obtained from calculated solution, it will
The pressure solution that the pressure solution measures obtained real standard well with horizontal well pressure measuring unit 11 is fitted, in the hope of reality
The pressure interpretation parameter of horizontal well.
According to embodiments of the present invention, pressure interpretation considers horizontal well because the factors such as completion mode, reservoir heterogeneity are made
At horizontal well unevenly produce the production actual conditions of liquid, the new parameter that horizontal well pressure is explained effectively produces liquid section
Number of segment and each effective section of position, length introduce the pressure interpretation model, go fitting to explain according to the pressure interpretation model
The pressure interpretation parameter of real standard well data, obtained real standard well more meets actual formation situation, and is obtained according to this
The pressure interpretation parameter of real standard well can intuitively and effectively be diagnosed to be the high yield liquid position of real standard well and each
The production status at position, to propose targeted well stimulation.And the pressure interpretation model can pass through aforementioned formula (1)
The horizontal well with bottom water reservoir seepage flow mathematical formulae of~formula (3) is realized namely preset relation and pressure interpretation parameter meet
Horizontal well with bottom water reservoir seepage flow mathematical formulae is realized, and the scope of protection of the present invention is not limited to this, any to consider bottom water oil
The horizontal well pressure interpretation model of hiding should all be contained in protection scope of the present invention.
Pressure interpretation parameter processing unit 13 is used to be performed corresponding processing according to the judging result of judging unit 12, if
The result that judging unit 12 judges is equal with preset relation value as actual pressure relation value, then by the corresponding pressure of the preset relation value
Power explains pressure interpretation parameter of the parameter as real standard well, if it is determined that the result that unit 12 judges then is led to be unequal
Excess pressure explains that parameters revision unit (not shown) corrects the corresponding pressure interpretation parameter of above-mentioned preset relation, until equal
Or reach specified accuracy.Wherein, the pressure interpretation parameter processing unit 13 of the present embodiment includes pressure interpretation parameters revision unit
(not shown), for unequal as actual pressure relation value and preset relation value in the result judged when judging unit 12
When, go amendment to adjust the corresponding pressure interpretation parameter of the preset relation, until it is equal, when by correcting adjustment pressure interpretation parameter
When preset relation value afterwards is equal with actual pressure relation value, then the corresponding one group of pressure interpretation parameter of the preset relation value is made
The progress subsequent operation of dynamic monitoring unit 14 is supplied to for the pressure interpretation parameter of real standard well.
Dynamic monitoring unit 14 is used to handle obtained real standard well according to through pressure interpretation parameter processing unit 13
Pressure interpretation parameter, analyzes the high yield liquid position of the horizontal well different level section and the production status at each position, and proposition has needle
The development with controlled level well is more precisely instructed in well stimulation to property.
According to embodiments of the present invention, it is preferable that the system further includes storage unit 15, and the storage unit 15 is for storing pressure
Power interpretation model namely preset relation and corresponding pressure interpretation parameter, so as to the preset relation and horizontal accordingly of judging unit 12
Well pressure measuring unit 11 measures obtained actual pressure relationship and is compared judgement, and this is default according to the modified result of judgement
The corresponding pressure interpretation parameter of relationship, obtains the pressure interpretation parameter of real standard well.The process is completely said aforementioned
Bright, details are not described herein.
During implementing the present embodiment, above-mentioned judging unit 12, pressure interpretation parameter processing unit 13 and storage
Unit 15 can realize that its respective function, said memory cells 15 independent can also be realized by computer server
Its function.
In order to keep the above embodiment of the present invention more clear and easy to understand, below with reference to specific application to monitoring side of the invention
Method is described in detail, detailed process are as follows:
Firstly, measure certain horizontal well closing well for a period of time in bottom pressure value, obtain the horizontal well pressure difference and
Relation curve (derivative curve (the Δ p ', Δ t), and be drawn in of Δ p, Δ t) and pressure difference and the relation curve of time of time
In log-log coordinate, the log-log graph of an actual measurement is obtained, log-log graph reaction is required relation value；
Then, the preset relation value prestored is extracted, to be compared with aforementioned real standard well pressure relation value, this is default
Relation value and pressure interpretation parameter have a corresponding relationship；
Again, above-mentioned real standard well pressure relation value is compared and is judged with preset relation value, if the reality
Horizontal well pressure relation value is equal to the preset relation value, then the corresponding one group of pressure interpretation parameter of the preset relation value is the water
The actual pressure of horizontal well explains parameter；If the real standard well pressure relation value is not equal to the preset relation value, pre- to this
If the corresponding pressure interpretation parameter of relation value is modified, until equal, obtain the horizontal well actual pressure explain parameter as
Only；
Finally, explaining parameter guidance according to the actual pressure of the obtained horizontal well and controlling the exploitation work of the horizontal well
Make.
It should be noted that the corresponding relationship of preset relation value and pressure interpretation parameter is that the present invention considers horizontal well
The pressure interpretation model that liquid is unevenly produced in actual production, according to embodiment, can by aforementioned formula (1)~formula (3) come
It realizes, details are not described herein, and the claimed pressure interpretation model for having considered horizontal well with bottom water reservoir is not limited to
This.
As shown in figure 4, monitoring system diagram 3 institute according to the invention for setting identification for horizontal well with bottom water reservoir high yield liquid level
Show that horizontal well difference produces under number of segment shown in horizontal well with bottom water reservoir pressure double-log typical curve relationship, according to this in embodiment
Curved line relation value can be used to explain actual parameter.
In conclusion the present invention provides the horizontal well with bottom water reservoir pressure interpretations for oil field development dynamic monitoring field
Method depicts and considers horizontal well with bottom water reservoir pressure and differential of pressure curve, filled up pressure interpretation before this and do not considered bottom water
The unaccountable blank in reservoir horizontal well practical high yield liquid position, reduces costs, method is simple and easy.It is carried out using the present invention
Pressure interpretation more meets the actual condition of production of horizontal well, can be diagnosed to be the high yield liquid position of real standard well, effectively produce
Segment length and each section of pollution condition, to propose targeted well stimulation, more precisely guidance and controlled level
The development of well.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, for example, the type of attachment etc. of each unit.Any modification for all within the spirits and principles of the present invention, being made, etc.
With replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of monitoring method for setting identification for horizontal well with bottom water reservoir high yield liquid level, it is characterised in that the following steps are included:
Step 1): the measurement certain level well bottom pressure value interior for a period of time in closing well obtains the pressure value of real standard well
With the variation relation of time；
Step 2): judging whether the pressure value of real standard well is equal with the variation relation of time with preset relation, if equal,
It then enters step 4), otherwise enters step 3)；
Step 3): the corresponding pressure interpretation parameter of amendment preset relation, so that revised preset relation and real standard well
Pressure value is equal with the variation relation of time, enters step 4)；
Step 4): using the corresponding pressure interpretation parameter of preset relation as the pressure interpretation parameter of real standard well.
2. the monitoring method according to claim 1 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature exist
In pressure interpretation parameter includes horizontal production section number of segment, respectively produces fragment position, respectively grows segment length, permeability, comprehensive compression system
Several and core intersection.
3. the monitoring method according to claim 1 or 2 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature
It is, the formula that preset relation and pressure interpretation parameter meet are as follows:
In formula, Δ p is bottom hole pressure difference, units MPa；P is horizontal well pressure, units MPa；piFor original formation pressure, units MPa；
khFor horizontal direction in-place permeability, unit 10-3μm2；kvFor vertical in-place permeability, unit 10-3μm2；For porosity, nothing
Dimension；CtFor system compressibility, units MPa-1；ηhFor horizontal direction piezometric conductivity, unit 10-3μm2·MPa/(mPa·s)；
ηvFor vertical piezometric conductivity, unit 10-3μm2·MPa/(mPa·s)；Q is horizontal well yield, unit m3/d；qwiIt is i-th
Produce the yield of section, unit m3/d；L is production segment length, unit m；LwiThe length of section, unit m are produced for i-th；rwFor well
Radius, unit m；Gx, GyzSource function for x, on the direction yz；(xwi, ywi, zwi) it is i-th of coordinate bit for producing section central point
It sets；H is core intersection, unit m；T, τ is time, unit s, GxIndicate the source function of horizontal column source parallel, horizontal well axial direction
For GyzIndicate the source function of horizontal column source vertical-horizontal well axial direction.
4. the monitoring method according to claim 1 or 2 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature
It is, the variation relation of pressure value and time include closing pressure difference and the double logarithmic curve relationship and pressure difference of time and time
It is the double logarithmic curve relationship of derivative, wherein double-log indicatrix is the curve drawn under log-log coordinate system, double-log
Coordinate is the plane coordinate system that the unit length of two reference axis is all after Logarithmic calculation.
5. the monitoring method according to claim 4 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature exist
In the step 3) corrects the corresponding pressure interpretation parameter of preset relation, detailed process are as follows:
The preset relation uses double-log indicatrix, double logarithmic curve relationship including dimensionless pressure and nondimensional time and
The double logarithmic curve of dimensionless pressure derivative and nondimensional time；
When the pressure value of real standard well and the unequal relationship of time and preset relation, i.e., two double logarithmic curves cannot weigh
When conjunction, preset relation curve is adjusted, is overlapped it with real standard well relation curve, explained and joined due to preset relation corresponding pressure
Number, this process are amendment pressure interpretation parameter.
6. a kind of monitoring system for setting identification for horizontal well with bottom water reservoir high yield liquid level, which is characterized in that the system includes water
Horizontal well pressure measurement cell, judging unit, pressure interpretation parameter processing unit and dynamic monitoring unit；
The horizontal well pressure measuring unit is used to measure certain horizontal well bottom pressure value interior for a period of time in closing well, obtains reality
The variation relation of international standard well pressure value and time；
The judging unit is used to judge the pressure dependence and preset relation of real standard well；
The pressure interpretation parameter processing unit is for handling the judging result of the judging unit, if the judgement
The result of unit judges is that actual pressure relation value is equal with preset relation value, then by the corresponding pressure interpretation of the preset relation value
Pressure interpretation parameter of the parameter as real standard well, if the result that the judging unit judges to be unequal, in amendment
State the corresponding pressure interpretation parameter of preset relation；
The dynamic monitoring unit is used for according to the real standard well handled through the pressure interpretation parameter processing unit
Pressure interpretation parameter analyzes the high yield liquid position of the horizontal well different level section and the production status at each position.
7. the monitoring system according to claim 6 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature exist
In the system further includes pressure interpretation parameters revision unit, and the result for judging when the judging unit is actual pressure pass
When set occurrence and preset relation value are unequal, amendment adjusts the corresponding pressure interpretation parameter of the preset relation, until it is equal, work as process
It is when preset relation value after amendment adjustment pressure interpretation parameter is equal with actual pressure relation value, then the preset relation value is corresponding
One group of pressure interpretation parameter be supplied to the dynamic monitoring unit as the pressure interpretation parameter of real standard well.
8. the monitoring system according to claim 6 or 7 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature
Be, which further includes storage unit, the storage unit for storing pressure interpretation model, i.e., preset relation with it is corresponding
Pressure interpretation parameter, so as to the judging unit reality that preset relation and the horizontal well pressure measuring unit measurement obtain accordingly
Border pressure dependence is compared judgement.
9. the monitoring system according to claim 8 for setting identification for horizontal well with bottom water reservoir high yield liquid level, feature exist
In the formula that preset relation and pressure interpretation parameter meet are as follows:
In formula, Δ p is bottom hole pressure difference, units MPa；P is horizontal well pressure, units MPa；piFor original formation pressure, units MPa；
khFor horizontal direction in-place permeability, unit 10-3μm2；kvFor vertical in-place permeability, unit 10-3μm2；For porosity, nothing
Dimension；CtFor system compressibility, units MPa-1；ηhFor horizontal direction piezometric conductivity, unit 10-3μm2·MPa/(mPa·s)；
ηvFor vertical piezometric conductivity, unit 10-3μm2·MPa/(mPa·s)；Q is horizontal well yield, unit m3/d；qwiIt is i-th
Produce the yield of section, unit m3/d；L is production segment length, unit m；LwiThe length of section, unit m are produced for i-th；rwFor well
Radius, unit m；Gx, GyzSource function for x, on the direction yz；(xwi, ywi, zwi) it is i-th of coordinate bit for producing section central point
It sets；H is core intersection, unit m；T, τ is time, unit s, GxIndicate the source function of horizontal column source parallel, horizontal well axial direction
For GyzIndicate the source function of horizontal column source vertical-horizontal well axial direction.
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