CN110515138A - The determination method of target well permeability predominant pathway, whole district's permeability predominant pathway - Google Patents
The determination method of target well permeability predominant pathway, whole district's permeability predominant pathway Download PDFInfo
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Abstract
The present invention provides the determination methods of a kind of determination method of target well permeability predominant pathway and whole district's permeability predominant pathway.The determination method of the target well permeability predominant pathway can comprise the following steps that petro-gas permeation rate predominant direction in determining reservoir；Target well permeability predominant pathway is determined according to the Permeability Parameters of each offset well around target well.The determination method of whole district's permeability predominant pathway, which can comprise the following steps that, determines method using target well permeability predominant pathway as described above to determine the permeability predominant pathway of each individual well in the whole district；The permeability predominant pathway for connecting each individual well obtains whole district's permeability predominant pathway.Beneficial effects of the present invention can include: obtain data and be easy, without the data of large amount of complex, cost is extremely low, convenient and efficient without complicated calculating process.
Description
Technical field
The present invention relates to oil-gas exploration and development technical fields, particularly, are related to a kind of target well permeability predominant pathway
Determine method and a kind of determination method of whole district's permeability predominant pathway.
Background technique
Permeability predominant pathway is also seepage channel or predominant pathway, is since the non-mean value of the plane of reservoir causes to store up
The good penetrability of layer in a certain direction is easier to flow in this direction in other directions, fluid (oil, gas and water).It is existing
In technology, the method for determining permeability predominant pathway usually has following several: (1) intake profile+production logging identification advantage is logical
Road；(2) with describing reservoir heterogeneity and predominant pathway can be identified using a large amount of coring data；(3) Interwell tracer detects
Method identifies permeability predominant pathway；(4) Well Test Data Analysis Method identifies predominant pathway；(5) Production development inversion method, which determines, seeps
Saturating rate predominant pathway；(6) Hall Curve method determines permeability predominant pathway；(7) reservoir numerical simulation method identifies permeability advantage
Channel；(8) petrel modeling software connected component calculation method determines predominant pathway.
However, in the prior art or needing water injection well and Production log data or needing a large amount of rock core at these
Analysis of data or with high costs and heavy workload or be exactly to need detailed Production development data or by the way that other are soft
The comprehensive various Production development data gridding processing of part identify predominant pathway.These technical methods to firsthand information require compared with
Height should not quickly and easily carry out the determination of permeability predominant pathway.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to solve above-mentioned one existing in the prior art
Or multiple problems.For example, one of the objects of the present invention is to provide a kind of simple, fast target well permeability predominant pathways
Determine the determination method of method and whole district's permeability predominant pathway.
To achieve the goals above, one aspect of the present invention provides a kind of determination side of target well permeability predominant pathway
Method.
The method can comprise the following steps that petro-gas permeation rate predominant direction in determining reservoir；According to each around target well
The Permeability Parameters of offset well determine target well permeability predominant pathway.
The step of one or more exemplary embodiment according to the present invention, the determining petro-gas permeation rate predominant direction, can
It include: to determine petro-gas permeation rate predominant direction by working out more well interwell permeability isograms
The step of one or more exemplary embodiment according to the present invention, the determining target well permeability predominant pathway
Can include: on the permeability isogram, using target well position as the center of circle, draw any circle；It will be each around target well
The permeability value of offset well does ratio with permeability value maximum in offset well respectively, obtains the permeability ratio of each offset well；Described
On permeability isogram, each offset well is connect respectively with the center of circle, line identical with offset well quantity is obtained, then in each line
The permeability control point in upper each offset well direction of determination, wherein the distance in permeability control point to the center of circle in each offset well direction is equal to
The permeability ratio of corresponding offset well is multiplied by round radius；On the permeability predominant direction, excessively each permeability control point
Make oval or close ellipse figure, the oval or nearly ellipse figure is the permeability predominant pathway of target well.Wherein, the line
It can be and be starting point using the center of circle and pass through the ray of neighbouring well either using the center of circle and offset well as the line segment of endpoint.
The step of one or more exemplary embodiment according to the present invention, the determining target well permeability predominant pathway
Can include: on the permeability isogram, using target well position as the center of circle, draw circle, wherein round radius is not more than
The half of distance between target well and nearest offset well；By the permeability value of each offset well around target well respectively in offset well most
Big permeability value does ratio, obtains the permeability ratio of each offset well；On the permeability isogram, respectively by each offset well
It is connect with the center of circle, obtains line identical with offset well quantity, the permeability control in each offset well direction is then determined on each line
Point, wherein the distance at the permeability control point in each offset well direction to the center of circle is equal to the permeability ratio of corresponding offset well multiplied by circle
Radius；On the permeability predominant direction, oval or close ellipse figure is made at each permeability control point excessively, it is described oval or
Nearly ellipse figure is the permeability predominant pathway of target well.Wherein, the line can be using the center of circle as starting point and by neighbouring
The ray of well is either using the center of circle and offset well as the line segment of endpoint.
One or more exemplary embodiment according to the present invention, the quantity of offset well is at least 3 around the target well,
Such as 4 or 5.
Another aspect of the present invention provides a kind of determination method of whole district's permeability predominant pathway.
The method includes the steps: using target well permeability predominant pathway as described above determining method determines in the whole district
The permeability predominant pathway of each individual well；The permeability predominant pathway for connecting each individual well obtains whole district's permeability predominant pathway.Its
In, the target well permeability predominant pathway determines the step of setting the goal well permeability predominant pathway in method really can include:
On the permeability isogram, using target well position as the center of circle, circle is drawn, wherein round radius is not more than target well
The half of distance between nearest offset well；By the permeability value of each offset well around target well respectively with infiltration maximum in offset well
Saturating rate value does ratio, obtains the permeability ratio of each offset well；On the permeability isogram, respectively by each offset well and the center of circle
Connection, obtains line identical with offset well quantity, and the permeability control point in each offset well direction is then determined on each line,
In, the distance in permeability control point to the center of circle in each offset well direction is equal to the permeability ratio of corresponding offset well multiplied by round half
Diameter；On the permeability predominant direction, oval or close ellipse figure is made at excessively each permeability control point, described oval or close ellipse
Circle diagram shape is the permeability predominant pathway of target well.
The permeability predominant pathway of an exemplary embodiment according to the present invention, each individual well of connection includes: connection
Permeability predominant pathway between each neighbouring individual well.
An exemplary embodiment according to the present invention, the distance between described each neighbouring individual well can be not more than a well
Away from.
The step of exemplary embodiment according to the present invention, the permeability predominant pathway of each neighbouring individual well of connection
Can include:
Along the long axis direction of each oval or nearly ellipse figure, the permeability advantage of neighbouring individual well is led to two curves respectively
Road connects, and obtains whole district's permeability predominant pathway, wherein the permeability predominant pathway of neighbouring individual well is all located at two curves
Between, each oval or nearly ellipse figure is the permeability predominant pathway of each neighbouring individual well.
Compared with prior art, beneficial effects of the present invention can include: method is easy, obtains data is easy, without a large amount of
Complicated data, cost is extremely low, convenient and efficient without complicated calculating process.
Detailed description of the invention
By the description carried out with reference to the accompanying drawing, above and other purpose of the invention and feature will become more clear
Chu, in which:
Fig. 1 shows a flow diagram of the determination method of target well permeability predominant pathway of the present invention；
Fig. 2 shows certain oil field reservoir permeability isograms of the invention；
Fig. 3 shows the schematic diagram at the permeability control point in each offset well direction target well P1 in Fig. 2；
Fig. 4 shows the schematic diagram of the permeability predominant pathway of target well P1 in Fig. 2；
Fig. 5 shows a schematic diagram for connecting the permeability predominant pathway of each neighbouring individual well.
Specific embodiment
Hereinafter, target well permeability advantage of the invention will be described in detail in conjunction with attached drawing and exemplary embodiment to lead to
The determination method in road and the determination method of whole district's permeability predominant pathway.
For having put into the oil gas field of exploitation, understands fully that development well interwell communication direction is most important, be directly related to oil gas
The great exploration and development decision such as remaining oil distribution forecast between field waterflooding extraction and well.Due to oil-gas Layer usually have it is stronger it is non-
Matter, underground oil and gas flow always along permeability predominant direction flow priority, therefore in oilfield exploitation procedure, oily between well
Gas and injection water flowing there is certain directionality, and water filling is would have to consider that interwell permeability advantage is logical by effect analysis between well
Road.
The present invention utilizes the reservoir static parameter (permeability) of individual well, by simple computation, can quantitatively determine and seep between well
Saturating rate predominant pathway, provides direct basis for oil gas field waterflooding extraction and remaining oil research technology.It present invention can be suitably applied to carry out
Water filling or the old oil- and gas-field remaining oil distribution research gone into operation.
One aspect of the present invention provides a kind of determination method of target well permeability predominant pathway.
Fig. 1 shows a flow diagram of the determination method of target well permeability predominant pathway of the present invention；Fig. 2 shows
Certain oil field reservoir permeability isogram.Fig. 3 shows the permeability control point in each offset well direction of target well of the present invention
Schematic diagram, wherein (a) shows the schematic diagram of the periphery target well P1 maximum permeability direction controlling point in Fig. 2, (b) illustrates
It is adjacent (c) to show the periphery target well P1 in Fig. 2 for the schematic diagram for having gone out offset well P16 direction controlling point in the periphery target well P1 in Fig. 2
The schematic diagram of well P12 direction controlling point (d) shows the signal of offset well P11 direction controlling point in the periphery target well P1 in Fig. 2
Figure.Fig. 4 shows the schematic diagram of the permeability predominant pathway of target well P1 in Fig. 2.
In the exemplary embodiment that target well permeability predominant pathway of the invention determines method, determined method
It can comprise the following steps that
Determine petro-gas permeation rate predominant direction in reservoir.Wherein, can by work out more well interwell permeability isograms come
Determine petro-gas permeation rate predominant direction.The reservoir can be Gas Reservoir, be also possible to oil reservoir.
Target well permeability predominant pathway is determined according to the Permeability Parameters of each offset well around target well.
In the present embodiment, the step of determining target well permeability predominant pathway can include: in described permeability etc.
It is worth on line chart, is drawn and justified as the center of circle using target well position, wherein round radius can be arbitrary value, further, round radius
It is smaller than the half for being equal to distance between target well and nearest offset well；By the permeability value difference of each offset well around target well
Ratio is done with permeability value maximum in offset well, obtains the permeability ratio of each offset well；On the permeability isogram, point
Not by each offset well and circle center line connecting, the permeability control point in each offset well direction is then determined on each line, wherein each offset well
The distance in the permeability control point in direction to the center of circle is equal to the permeability ratio of corresponding offset well multiplied by round radius；In the infiltration
On saturating rate isogram, oval or close ellipse figure is made at excessively each permeability control point, and the oval or nearly ellipse figure is mesh
Mark the permeability predominant pathway of well.
In the present embodiment, the target well is the oil/gas well that will carry out filling the water or having gone into operation.
In another exemplary embodiment that target well permeability predominant pathway of the invention determines method, such as Fig. 1 institute
Show, determined method can comprise the following steps that
The first step works out more well permeability isograms, and second step quantitatively determines target well according to adjacent well permeability ratio
Predominant pathway (i.e. permeability predominant pathway).
(1) step 1: determining oil and gas flow main direction, i.e. permeability predominant direction according to permeability lateral variation.
In same pressure system, underground oil and gas flowing always along permeability predominant direction flow priority, permeability predominant direction
The method of determination is the more well interwell permeability isograms of establishment.As shown in fig. 2, the direction of the band of permeability relatively high value is storage
Layer permeability predominant direction；Each well of certain oilfield exploitation oil reservoir, such as P7, P17 etc. are indicated in Fig. 2 with P beginning parameter；Figure
With each permeability with the neighbouring each well of digital representation of P beginning parameter in 2, such as the permeability of P7 well is 523mD, P17
The permeability of well is 615mD.
(2) step 2: determining individual well seepage channel (i.e. permeability predominant pathway) according to perimeter well Permeability Parameters.Specifically
Steps are as follows:
1) using target well as the center of circle, any circle is drawn, radius is denoted as r, by the well in the center of circle and periphery maximum permeability value
It is connected, control point of the point that line intersects with circle as target well periphery maximum permeability direction.As shown in (a) figure in Fig. 3,
P1 is target well, and P17 is the maximum well of target well periphery osmotic value, and the intersection point of the line and circle of P1 and P17 is target well week
The control point in side maximum permeability direction.
2) permeability value of well neighbouring around target well and well week maximum permeability value are done into ratio respectively, obtains offset well
Relative to a relative value of well week maximum permeability, it is shown in Table 1.
1 P1 well offset well permeability ratio table of table
| Pound sign | Permeability, mD | Permeability ratio | Remarks |
| P16 | 147 | 0.2 | 147/615 |
| P12 | 559 | 0.9 | 559/615 |
| P11 | 388 | 0.6 | 388/615 |
| P17 | 615 | 1.0 | 615/615 |
It 3), should by permeability ratio ratio-dependent on line using the center of circle as starting point respectively by offset well and circle center line connecting
The permeability control point in offset well direction, the distance of the point to the center of circle are permeability ratio multiplied by radius of circle r, see (b) in Fig. 3,
(c) and (d) figure.
4) on permeability isogram, on the permeability predominant direction that the first step determines, the control of offset well permeability is crossed
Point makees oval or close elliptical shape, then the figure is the permeability predominant pathway of target well, elliptical shape as shown in Figure 4.Into
And it can determine the permeability predominant pathway of each individual well of the whole district.Predominant pathway needs total in conjunction with control point on permeability predominant direction
With determine, if only control point determine, when periphery well point is less may inaccuracy or have multi-solution, the first step determine
The constraint of permeability predominant direction it is lower can be more rigorous, i.e., when adjacent control point is lacked around marginal well, need according to permeability
Isogram (i.e. permeability predominant direction) constrains.In view of the physical plane heterogeneity of oil reservoir, fluid neuron network is always towards one
A principal direction flowing；Vertical principal direction also has flow phenomenon, but this is secondary behavior, therefore selects oval or close elliptical shape
It is that comparison is reasonable.
Another aspect of the present invention provides a kind of determination method of whole district's permeability predominant pathway.
Determine in one exemplary embodiment of method that the method may include in whole district's permeability predominant pathway of the invention
Following steps:
It is excellent come the permeability for determining each individual well in the whole district according to the determination method of above-mentioned target well permeability predominant pathway
Gesture channel.Wherein, in the determining target well permeability predominant pathway the step of, round radius can be no more than periphery most The Small Well
Away from half, can exist to avoid the subsequent multiple oval or nearly elliptical shapes made intersect in this way, it is complete in order to obtain
The permeability predominant pathway in area.
The permeability predominant pathway for connecting each individual well obtains whole district's permeability predominant pathway.
In the present embodiment, the step of permeability predominant pathway of each individual well of connection can include: along oval or close ellipse
The permeability predominant pathway of neighbouring individual well is connected with two curves, obtains whole district's permeability by the long axis direction of round
Predominant pathway.Wherein, the permeability predominant pathway of neighbouring individual well is located between two curves, i.e., two curves are located at ellipse
Or the both sides of nearly elliptical shape long axis.Wherein, as shown in (b) figure in Fig. 5, if along oval or close elliptical long axis side
To oval or close ellipse corresponding to two neighbouring individual wells side by side, that is, is in parallel connection, then two curves are located at two ellipses
Or nearly elliptical two sides, and in the two oval or close ellipses are enclosed in.Neighbouring individual well refers to 2 or multiple at proximity relations
Individual well, and the distance between individual well be not more than a well spacing, the well spacing of oil well is usually 300~500m, and gas well is usually
1000~2000m；Oil-gas Layer relatively good for reservoir conditions, physical property is good, since connectivity is preferable, the distance between neighbouring well
More than one well spacing can also be greater than.(a) in Fig. 5 shows logical in two neighbouring individual well permeability advantages of series relationship
The connection type in road, (b) showing not only includes in parallel but also including series relationship 3 between individual well permeability predominant pathway
Connection type, be the permeability predominant pathway of partial region within two curve ranges.
In conclusion the determination method and whole district's permeability predominant pathway of target well permeability predominant pathway of the invention
The advantages of determining method can include:
(1) compared with prior art, the present invention obtains data and is easy, and does not need tracer data, does not need Production development
Data does not need a large amount of core analyzing data, does not need water injection well data, it is only necessary to the reservoir of each individual well static state well log interpretation
Permeability data, the data easily obtain, and cost is extremely low.
(2) present invention does not need complicated calculating process yet, and not needing special Large-scale professional software can be accomplished in a simple,
It is convenient and efficient.
(3) present invention can be rich to, water enchroachment (invasion) direction, locating hydrocarbon field remaining oil by efficacious prescriptions to fill the water between accurate determining well
Ji Qu, to realize that oil gas field benefit high yield provides direct technical support.
Although those skilled in the art should be clear above by combining exemplary embodiment to describe the present invention
Chu can carry out exemplary embodiment of the present invention each without departing from the spirit and scope defined by the claims
Kind modifications and changes.
Claims (10)
1. a kind of determination method of target well permeability predominant pathway, which is characterized in that the described method comprises the following steps:
Determine petro-gas permeation rate predominant direction in reservoir；
Target well permeability predominant pathway is determined according to the Permeability Parameters of each offset well around target well.
2. the determination method of target well permeability predominant pathway according to claim 1, which is characterized in that the determining oil
The step of gas permeability predominant direction includes:
Petro-gas permeation rate predominant direction is determined by working out more well interwell permeability isograms.
3. the determination method of target well permeability predominant pathway according to claim 2, which is characterized in that the determining mesh
Mark well permeability predominant pathway the step of include:
On the permeability isogram, using target well position as the center of circle, any circle is drawn；
The permeability value of each offset well around target well is done into ratio with permeability value maximum in offset well respectively, obtains each offset well
Permeability ratio；
On the permeability isogram, each offset well is connect respectively with the center of circle, obtains line identical with offset well quantity, so
The permeability control point in each offset well direction is determined on each line afterwards, wherein the permeability control point to the center of circle in each offset well direction
Distance be equal to corresponding offset well permeability ratio multiplied by round radius；
On the permeability predominant direction, oval or close ellipse figure is made at excessively each permeability control point, described oval or close
Ellipse figure is the permeability predominant pathway of target well.
4. the determination method of target well permeability predominant pathway according to claim 2, which is characterized in that the determining mesh
Mark well permeability predominant pathway the step of include:
On the permeability isogram, using target well position as the center of circle, circle is drawn, wherein round radius is not more than mesh
Mark the half of distance between well and nearest offset well；
The permeability value of each offset well around target well is done into ratio with permeability value maximum in offset well respectively, obtains each offset well
Permeability ratio；
On the permeability isogram, each offset well is connect respectively with the center of circle, obtains line identical with offset well quantity, so
The permeability control point in each offset well direction is determined on each line afterwards, wherein the permeability control point to the center of circle in each offset well direction
Distance be equal to corresponding offset well permeability ratio multiplied by round radius；
On the permeability predominant direction, oval or close ellipse figure is made at excessively each permeability control point, described oval or close
Ellipse figure is the permeability predominant pathway of target well.
5. the determination method of target well permeability predominant pathway according to claim 2 or 3, which is characterized in that the mesh
The quantity of offset well is at least 3 around mark well.
6. the determination method of target well permeability predominant pathway according to claim 1, which is characterized in that the target well
For the oil/gas well for filling the water or having gone into operation will be carried out.
7. a kind of determination method of whole district's permeability predominant pathway, which is characterized in that the method includes the steps:
The permeability predominant pathway of each individual well in the whole district is determined using method as claimed in claim 4；
The permeability predominant pathway for connecting each individual well obtains whole district's permeability predominant pathway.
8. the determination method of whole district's permeability predominant pathway according to claim 7, which is characterized in that each list of connection
The permeability predominant pathway of well includes: the permeability predominant pathway between each neighbouring individual well of connection.
9. the determination method of whole district's permeability predominant pathway according to claim 8, which is characterized in that described each neighbouring single
The distance between well is not more than a well spacing.
10. the determination method of whole district's permeability predominant pathway according to claim 9, which is characterized in that the connection is each
Include: adjacent to the step of permeability predominant pathway of individual well
Along the long axis direction of each oval or nearly ellipse figure, the permeability predominant pathway of neighbouring individual well is connected with two curves respectively
It picks up and, wherein the permeability predominant pathway of neighbouring individual well is all located between two curves, each oval or close ellipse figure
For the permeability predominant pathway of each neighbouring individual well.
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| CN105041307A (en) * | 2015-07-23 | 2015-11-11 | 中国石油大学(华东) | Industrial procedure for identifying preferential seepage channels of oil and gas reservoirs of clastic rock |
| US20180252102A1 (en) * | 2017-03-01 | 2018-09-06 | Proptester, Inc. | Fluid Flow Testing Apparatus And Methods |
| CN110245813A (en) * | 2018-03-10 | 2019-09-17 | 中国石油天然气股份有限公司 | The determination method of water flow predominant pathway development degree |
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