CN105134187A - Method and device for assisting in oil reservoir sedimentary facies classification and connectivity evaluation - Google Patents
Method and device for assisting in oil reservoir sedimentary facies classification and connectivity evaluation Download PDFInfo
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- CN105134187A CN105134187A CN201510507382.1A CN201510507382A CN105134187A CN 105134187 A CN105134187 A CN 105134187A CN 201510507382 A CN201510507382 A CN 201510507382A CN 105134187 A CN105134187 A CN 105134187A
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Abstract
The invention discloses a method and a device for assisting in oil reservoir sedimentary facies classification and connectivity evaluation. The method comprises the following steps: acquiring location data of multiple oil wells in an oil reservoir and test pressure data of the multiple oil wells; converting the test pressure data of the multiple oil wells into the reduced pressure of the multiple oil wells at the same time; generating a reduced pressure and well location data diagram according to the location data and the reduced pressure; and evaluating the connectivity of the oil reservoir and/or assisting in oil reservoir sedimentary facies classification according to the reduced pressure and well location data diagram. According to the method of the invention, pressure data of the oil reservoir monitored at different time is converted into pressure data at the same time, and then, sedimentary facies classification is assisted based on the pressure data after conversion. The connectivity of the oil reservoir is determined, the uncertainty in reservoir sedimentary facies and reservoir connectivity evaluation research is reduced, and the result of analysis is more reliable. The method and the device of the invention are of directive significance to actual injection and production well site deployment and development strategy establishment.
Description
Technical field
The present invention relates to oil-gas field development technical field, be specifically related to method and the device of a kind of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation.
Background technology
In oil-gas field development technical field, sedimentary facies refers to the summation of depositional environment and Sediment Characteristics formed in this context thereof.Usually, mostly oil-gas reservoir sedimentary facies division is to divide based on the static data such as rock core, well logging, adopts dynamic data such as pressure, water-cut variation etc. to carry out aided verification.The dynamic evaluation method of oil reservoir continuity is more, mainly comprises a series of dynamic analysing methods such as adopting pressure change contrast, change of production contrast, fluid properties contrast and evaluates.
At present, when reservoir sedimentary facies division and Connectivity Evaluation analysis being carried out to formation test pressure both at home and abroad, how to analyze from following two angles: one is analyze the pressure of different time monitoring, analyzes reservoir water adopt connectedness etc. by effect situation, note by the change analyzing pressure; Two is the pressure datas by the test of contrast same time, studies the connectedness etc. of oil reservoir plane and longitudinal direction.For second angle, because reservoir geology is complicated, and the static pressure data of reservoir monitoring are general relatively on the low side, the few especially problem of pressure data of same time monitoring, when analyzing, mostly that pressure data same year or the pressure data of monitoring in two years being equivalent to same time monitoring contrasts, thus auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation.
But it is uncertain largely that such equivalence must cause research understanding to exist.For the problems referred to above, at present effective solution is not yet proposed.
Summary of the invention
The object of the present invention is to provide method and the device of a kind of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, by the pressure data that the pressure data conversion of different time monitoring in exhaustion formula exploitation oil reservoir is the same time, divide mutually and the evaluation of reservoir communication based on the pressure data assistant depositing after conversion, make result of study more reliable.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
A method for auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, comprising: the well location data obtaining multiple oil well in oil reservoir, and the test pressure data of described multiple oil well; Be the reduced pressure of described multiple oil well at synchronization by the test pressure data reduction of described multiple oil well; Reduced pressure and well location entity relationship diagram is generated according to described well location data and described reduced pressure; The connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division is evaluated according to described reduced pressure and well location entity relationship diagram.
In one embodiment, evaluate the connectedness of oil reservoir according to described reduced pressure and well location entity relationship diagram, comprising:
Described oil reservoir continuity is determined according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram; When reduced pressure variable quantity is between 0psi/1000m ~ 30psi/1000m, determining that oil reservoir continuity is good, when reduced pressure variable quantity is when being greater than 30psi/1000m, determining that oil reservoir continuity is poor.
In one embodiment, assist oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram, comprising:
According to log, obtain the deposition phasor of described oil reservoir;
According to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram, the multiple oil wells in described oil reservoir are divided into multiple interval;
According to the result of the demarcation interval in described reduced pressure and well location entity relationship diagram, described deposition phasor correspondence is divided into multiple region;
According to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, the oil reservoir sedimentary facies after dividing is adjusted.
In one embodiment, obtain the well location data of oil well in oil reservoir, comprising:
Using the oil well of in described oil reservoir as benchmark oil well, obtain the relative well location data of the relatively described benchmark oil well of other oil wells;
Using the well location data of the relative well location data of acquisition as oil well.
In one embodiment, be the reduced pressure p of described oil well at synchronization according to following formula by the test pressure data reduction of described oil well
2:
Δp
1＝p
i-p
1；
Δp
2＝p
i-p
2；
Wherein, N
p1represent that oil well is at t
1the cumulative production in moment, unit m
3; N
p2represent that oil well is at t
2the cumulative production in moment, unit m
3; p
irepresent original formation pressure, units MPa; p
1represent that oil well is at t
1the test pressure in moment, units MPa; p
2represent that oil well is at t
2the reduced pressure in moment, units MPa; A is constant term.
In one embodiment, described oil well is pressure test well.
In one embodiment, according to following formulae discovery reduced pressure variable quantity:
Wherein, Δ p represents reduced pressure variable quantity, unit psi/m; p
arepresent the reduced pressure of the first oil well, unit psi; p
brepresent the reduced pressure of the second oil well, unit psi; L
arepresent the well location data of the first oil well, unit m; L
brepresent the well location data of the second oil well, unit m.
In one embodiment, after adjusting the oil reservoir sedimentary facies after division, described method also comprises:
The connectedness of the sedimentary facies corresponding to oil reservoir is determined according to the connectedness of oil reservoir.
The present invention also provides the device of a kind of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, comprising:
Pickup model, for obtaining the well location data of multiple oil well in oil reservoir, and the test pressure data of described multiple oil well;
Conversion module, for being the reduced pressure of described multiple oil well at synchronization by the test pressure data reduction of described multiple oil well;
Generation module, for generating reduced pressure and well location entity relationship diagram according to described well location data and described reduced pressure;
Evaluation module, for evaluating the connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram.
In one embodiment, described evaluation module comprises:
Acquiring unit, for according to log, obtains the deposition phasor of described oil reservoir;
First division unit, for being divided into multiple interval according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram by the multiple oil wells in described oil reservoir;
Second division unit, for the result according to the demarcation interval in described reduced pressure and well location entity relationship diagram, is divided into multiple region by described deposition phasor correspondence;
Adjustment unit, for according to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, adjusts the oil reservoir sedimentary facies after dividing.
In sum, after the pressure data of same time is converted to the pressure data of different time monitoring in oil reservoir, based on the division of the pressure data assistant depositing phase after conversion, determine the connectedness of reservoir, reduce the uncertainty in reservoir sedimentary facies and reservoir communication evaluation study, analysis result is more reliable, has directive significance to the formulation etc. of actual injection-production well well site deployment and development strategy.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 shows the method flow diagram of oil reservoir sedimentary facies division of the present invention and Connectivity Evaluation;
Fig. 2 shows the well location map of oil reservoir producing well of the present invention and pressure test well;
Fig. 3 shows test pressure and the well location entity relationship diagram of pressure test well of the present invention;
Fig. 4 shows oil reservoir deposition phasor in the present invention;
Fig. 5 shows the test pressure of pressure test well in the present invention and reduced pressure and well location entity relationship diagram;
Fig. 6 shows the deposition phasor in the present invention after oil reservoir adjustment;
Fig. 7 shows the module map of oil reservoir sedimentary facies division and Connectivity Evaluation in the present invention.
Detailed description of the invention
By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technician can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.
Refer to accompanying drawing 1, the invention provides a kind of method of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, comprise the steps:
S101: the well location data obtaining multiple oil well in oil reservoir, and the test pressure data of described multiple oil well;
S102: be the reduced pressure of described multiple oil well at synchronization by the test pressure data reduction of described multiple oil well;
S103: generate reduced pressure and well location entity relationship diagram according to described well location data and described reduced pressure;
S104: evaluate the connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram.
In the above-described embodiment, first the well location data of multiple oil well in oil reservoir are obtained, and the test pressure data of described multiple oil well, be that described multiple oil well is after the reduced pressure of synchronization by the test pressure data reduction of described multiple oil well, generate reduced pressure and well location entity relationship diagram according to described well location data and described reduced pressure, evaluate the connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram.After the pressure data of same time is converted to the test pressure data of different time in oil reservoir, based on the division of the pressure data assistant depositing phase after conversion, determine the connectedness of reservoir, reduce the uncertainty in reservoir sedimentary facies and reservoir communication evaluation study, analysis result is more reliable, has directive significance to the formulation etc. of actual injection-production well well site deployment and development strategy.
In the present embodiment, obtain the well location data of multiple oil well in oil reservoir, and the test pressure data of described multiple oil well.Such as, for certain large-scale marine facies sandstone oil reservoir, refer to accompanying drawing 2, this oil reservoir is only exploited two mouthfuls of oil well W-043 and W-019 at present, and the production time of these two mouthfuls of oil wells is respectively 1999 years and 2002 years.From the times of 2010 to 2012 about 2 years, bore the grease hole of meeting this oil reservoir and have 16 mouthfuls, these 16 mouthfuls of grease holes all carry out individual well pressure test after finishing drilling, thus obtain the test pressure data of these 16 mouthfuls of grease holes.Wherein, can be obtained the well location data of multiple oil well in this oil reservoir by accompanying drawing 2, namely this 16 mouth pressure testing well is relative to the distance of certain stratigraphic well, and choosing W-508 well is here stratigraphic well.
In the present embodiment, by the test pressure data reduction of described multiple oil well be the reduced pressure of described multiple oil well at synchronization.For the oil well in accompanying drawing 2, because this oil reservoir only has two mouthfuls of producing wells, so the pressure change of all pressure test wells causes by these two mouthfuls of producing wells.The test pressure data separate formula of all pressure test wells is converted, with the same time for benchmark, by the conversion of the pressure testing data of different time for after synchronization, calculates the reduced pressure of oil well at this synchronization.
In the present embodiment, reduced pressure and well location entity relationship diagram is generated according to described well location data and described reduced pressure.In reduced pressure and well location entity relationship diagram, abscissa represents the well location data ordinate difference of pressure test oil well W-508 well northernmost (ordinate being specially all pressure test wells in the well location map of accompanying drawing 2 in the present embodiment with) of pressure test well, and in fact abscissa illustrates the distance between oil well and oil well.In reduced pressure and well location entity relationship diagram, ordinate represents the reduced pressure of oil well.
In addition, before obtaining reduced pressure and well location entity relationship diagram, the graph of a relation of test pressure and well location data can be gone out according to the test pressure Plotting data of well location data and pressure test well, as shown in Figure 3, whether the pressure change that can obtain oil well from accompanying drawing 3 is caused by the distance between oil well.
In the present embodiment, after obtaining described reduced pressure and well location entity relationship diagram, be used for evaluating the connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division further.
Particularly, evaluate the connectedness of oil reservoir according to described reduced pressure and well location entity relationship diagram, comprising: determine described oil reservoir continuity according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram; When reduced pressure variable quantity is between 0psi/1000m ~ 30psi/1000m, determine that oil reservoir continuity is good, when reduced pressure variable quantity is greater than 30psi/1000m, determine that oil reservoir continuity is poor.
In the present embodiment, in reduced pressure and well location entity relationship diagram, the difference of adjacent two oil well ordinates represents the reduced pressure variable quantity of this adjacent oil well divided by the difference of adjacent two oil well abscissas.That is, when the reduced pressure variable quantity of adjacent oil well is between 0psi/1000m ~ 30psi/1000m, the connectedness of these two oil wells is good, when the reduced pressure variable quantity of adjacent oil well is greater than 30psi/1000m, and the poor connectivity of these two oil wells.
Assist oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram, comprising:
S401: according to log, obtains the deposition phasor of described oil reservoir;
S402: the multiple oil wells in described oil reservoir are divided into multiple interval according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram;
S403: according to the result of the demarcation interval in described reduced pressure and well location entity relationship diagram, is divided into multiple region by described deposition phasor correspondence;
S404: according to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, adjusts the oil reservoir sedimentary facies after dividing.
In the present embodiment, the deposition phasor of oil reservoir, as shown in Figure 4, this sedimentary facies figure represents the deposition phasor of certain large-scale marine facies sandstone oil reservoir.According to reduced pressure variable quantity in described reduced pressure and well location entity relationship diagram (difference of adjacent two oil well ordinates is divided by the difference of adjacent two oil well abscissas), the multiple oil wells in described oil reservoir are divided into multiple interval.When reduced pressure variable quantity is less than 30psi/1000m, oil well is the oil well in same interval.Such as, 16 mouth pressure test oil wells in this marine facies sandstone oil reservoir, be divided into the good interval of 4 connectednesses and the poor interval of 1 connectedness, wherein, oil well W-508, W-511, W-519, W-514, W-507, W-512 and W-520 are the oil well in the first interval, oil well W-504, W-510, W-522 and W-505 are the oil well in the second interval, oil well W-528, W-517 and W-521 are the oil well in the 3rd interval, W-524 is the oil well in the 4th interval, and the oil well in these four intervals is connective good interval.And W-516 well does not belong to the oil well in these four intervals, W-516 well is in connective poor interval.
In the present embodiment, according to the result of the demarcation interval in described reduced pressure and well location entity relationship diagram, be divided into multiple region by depositing phasor correspondence in accompanying drawing 4.Particularly, oil reservoir in oil well respective figure 4 interval in reduced pressure and well location entity relationship diagram four is deposited phasor, be corresponding 4 regions by the sedimentary facies diagram root of oil reservoir, namely oil well W-508, W-511, W-519, W-514, W-507, W-512 and W-520 is first area, oil well W-504, W-510, W-522 and W-505 are second area, oil well W-528, W-517 and W-521 are the 3rd region, and W-524 is the 4th region.
In the present embodiment, according to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, the oil reservoir sedimentary facies after dividing is adjusted.
Concrete regulation rule is please also refer to accompanying drawing 4-6,4 regions after division all based on river course and river course deposit complexes mutually, and reduced pressure variable quantity in each region in these 4 regions is very little, connectedness in visible each region is very good, and then known, the connectedness of river course phase reservoir is very good.
Except the sedimentary facies between first area and second area, be all be connected by sheet sand between second area with the 3rd region and between the 3rd region with the 4th region, as can be seen here, sheet sand reservoir is the reason causing zones of different to there is obvious pressure differential.The connectedness of sheet sand is obviously worse than the connectedness of river course and river course complex.
First area is obtained and second area exists pressure flex point (reduced pressure variable quantity is greater than 30psi/1000m) from accompanying drawing 5.But the first area divided in the oil reservoir deposition phasor of accompanying drawing 4 and second area belong to again same river course composite bulk phase, so should there is certain seepage flow barrier between first area and second area.After considering the uncertainty of Marine Delta depositional model and geological knowledge, think should there is an estuary dam phase between first area and second area.This estuary dam phase reservoir communication is relatively poor, is the reason causing first area and second area pressure gap.
Amended deposition phasor, as shown in Figure 6.Wherein, namely oil well W-508, W-511, W-519, W-514, W-507, W-512 and W-520 is first area, oil well W-504, W-510, W-522 and W-505 are second area, and oil well W-528, W-517 and W-521 are the 3rd region, and W-524 is the 4th region.An estuary dam phase is there is between first area and second area.
In one embodiment, obtain the well location data of oil well in oil reservoir, comprising: using the oil well of in described oil reservoir as benchmark oil well, obtain the relative well location data of the relatively described benchmark oil well of other oil wells; Using the well location data of the relative well location data of acquisition as oil well in drawing.
In the present embodiment, refer to accompanying drawing 2, can pressure test oil well W-508 to be northernmost as benchmark oil well in well location map, other oil well relative datum oil wells W-508 is the relative well location data of reference.Natch, also can with any one pressure test oil well of other except W-508 for benchmark oil well, other oil wells except this pressure test oil well are relative to the relative well location data of this pressure test oil well.
In one embodiment, be the reduced pressure p of described oil well at synchronization according to following formula by the test pressure data reduction of described oil well
2:
Δp
1＝p
i-p
1；
Δp
2＝p
i-p
2；
Wherein, N
p1represent that production well is at t
1the cumulative production in moment, unit m
3; N
p2represent that production well is at t
2the cumulative production in moment, unit m
3; p
irepresent original formation pressure, units MPa; p
1represent that oil well is at t
1the test pressure in moment, units MPa; p
2represent that oil well is at t
2the reduced pressure in moment, units MPa; A is constant term.
In the present embodiment, suppose that oil reservoir adopts exhaustion formula to develop always, oil reservoir is little of ignoring without the impact on exploitation of water body or water body, and now all producing wells of oil reservoir do not produce water, and oil reservoir matter balance equation is the matter balance equation of isochoric oil reservoir:
Wherein, N
prepresent the cumulative production of oil reservoir, unit m
3; B
orepresent the oil phase volume coefficient under pressure p; N represents reservoir reserve, unit m
3; B
oioil phase volume coefficient under expression original formation pressure; S
oirepresent initial oil saturation; C
orepresent the compression coefficient of oil, 1/MPa; S
wirepresent irreducible water saturation; C
wrepresent the compression coefficient of water, 1/MPa; C
frepresent the compression coefficient of rock, 1/MPa; S
wcrepresent mobile water saturation; Δ p represents pressure differential, MPa;
Owing to being the reduced pressure of synchronization by closing on the test pressure conversion in moment, suppose the testing time and convert time reservoir pressure difference less, B
o, C
o, C
w, C
fless with pressure change, ignore, then the matter balance equation of isochoric oil reservoir
Can be abbreviated as:
Wherein,
For constant, suppose
Then,
Can be abbreviated as: N
p=A* Δ p;
Wherein, N
prepresent the cumulative production of oil reservoir, unit m
3; A is constant term; Δ p represents pressure differential, MPa;
By N
p=A* Δ p can derive and draw described reduced pressure formula
Particularly, for the pressure conversion of a certain specified pressure test oil well, first need the surrounding's producing well determining to affect the change of this pressure test oil well pressure, thus not output N in the same time when can determine that this pressure test oil well pressure is changed
p(surrounding namely affecting the change of this pressure test oil well pressure produces oil well yield).Therefore, when pressure conversion is carried out to every mouth pressure test oil well, all need the surrounding's producing well determining separately to affect the change of this pressure test oil well pressure, thus the production well adopting respective ambient influence output not output N in the same time
pcalculate reduced pressure.
Such as, certain large-scale marine facies sandstone oil reservoir, adopts reduced pressure formula
the test pressure data of all pressure test oil wells are converted to the reduced pressure in January, 2011.The Pressure Drop of all pressure test oil wells causes by W-019 and W-043 two mouthfuls of production wells.Therefore reduced pressure formula
in yield data adopt the corresponding not cumulative production in the same time of W-019 and W-043 two mouthfuls of production wells, the test hours cumulative output N that namely each oil well is corresponding
p1with the cumulative production N of two mouthfuls of production wells during conversion January in 2011 time
p2.The pressure differential Δ p that each pressure test oil well is corresponding
1be respectively initial reservoir pressure p
ideduct the test pressure of each pressure test well, thus can by the reduced pressure of the pressure convert of all pressure test oil well different time tests to same in January, 2011 time.
As shown in Figure 5, after the test pressure of all pressure test oil wells is converted the reduced pressure of same time, the pressure of pressure test oil well obviously has subregion.Wherein, the pressure of all oil wells in first area, second area and the 3rd region is basically identical, and reduced pressure variable quantity is very little, and the inner each oil well pressure drop in these 3 districts unanimously illustrates that between these oil wells, connectedness is very good.And pressure gap between zones of different is obvious, there is obvious flex point, reduced pressure variable quantity is very large, which illustrates the connectedness of oil well between zones of different poor.
In one embodiment, according to following formulae discovery reduced pressure variable quantity:
Wherein, Δ p represents reduced pressure variable quantity, unit psi/m; p
arepresent the reduced pressure of the first oil well, unit psi; p
brepresent the reduced pressure of the second oil well, unit psi; L
arepresent the well location data of the first oil well, unit m; L
brepresent the well location data of the second oil well, unit m.
In one embodiment, after the oil reservoir sedimentary facies after division is adjusted, the connectedness of the sedimentary facies corresponding to oil reservoir is determined according to the connectedness of oil reservoir.
In the present embodiment, refer to accompanying drawing 5-6, river course and river course composite bulk phase connectedness good, sheet sand sedimentary facies poor connectivity, the estuary dam general character that is connected is medium.Therefore, after the overall waterflooding extraction of later stage oil reservoir, injection-production well position in prioritized deployment river course and river course complex facies tract, thus should ensure that producing well is fully imitated.
Based on same inventive concept, additionally provide the device of a kind of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation in the embodiment of the present invention, as described in the following examples.The principle of dealing with problems due to the device of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation is similar to the method for auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, therefore the enforcement of the device of auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation see the enforcement of the method for auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, can repeat part and repeats no more.Following used, term " unit " or " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.
Fig. 7 is a kind of structured flowchart of the auxiliary oil reservoir sedimentary facies division of the embodiment of the present invention and the device of Connectivity Evaluation, as shown in Figure 7, comprising: pickup model 701, conversion module 702, generation module 703, evaluation module 704, be described this structure below.
Pickup model 701, for obtaining the well location data of multiple oil well in oil reservoir, and the test pressure data of described multiple oil well;
Conversion module 702, for being the reduced pressure of described multiple oil well at synchronization by the test pressure data reduction of described multiple oil well;
Generation module 703, for generating reduced pressure and well location entity relationship diagram according to described well location data and described reduced pressure;
Evaluation module 704, for evaluating the connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram.
In one embodiment, evaluation module 704 comprises: determining unit, for determining described oil reservoir continuity according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram; When reduced pressure variable quantity is between 0psi/1000m ~ 30psi/1000m, determine that oil reservoir continuity is good, when reduced pressure variable quantity is greater than 0psi/1000m, determine that oil reservoir continuity is poor.
In one embodiment, evaluation module 704 comprises: acquiring unit, the second division unit and adjustment unit.Wherein, acquiring unit is used for according to log, obtains the deposition phasor of described oil reservoir; Multiple oil wells in described oil reservoir are divided into multiple interval according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram by the first division unit.Described deposition phasor correspondence, according to the result of the demarcation interval in described reduced pressure and well location entity relationship diagram, is divided into multiple region by the second division unit.Adjustment unit, according to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, adjusts the oil reservoir sedimentary facies after dividing.
In one embodiment, pickup model 701 comprises correcting unit, for using the oil well of in described oil reservoir as benchmark oil well, obtains the relative well location data of the relatively described benchmark oil well of other oil wells; Using the well location data of the relative well location data of acquisition as oil well in oil reservoir.
In one embodiment, oil well comprises pressure test well.
In one embodiment, evaluation module 704 also comprises check and correction unit, for determining the connectedness of the sedimentary facies corresponding to oil reservoir according to the connectedness of oil reservoir.
Adopted the in operation formula of said units and/or module is consistent with in the method performing step and above-mentioned auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, does not repeat them here.
In another embodiment, additionally provide a kind of software, this software is for performing the technical scheme described in above-described embodiment and preferred embodiment.
In another embodiment, additionally provide a kind of storage medium, store above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
As can be seen from the above description, the embodiment of the present invention achieves following technique effect: by after the reduced pressure of the test pressure of oil well different time being converted to the same time, the division of assistant depositing phase, determines the connectedness of reservoir, reliable results.The present invention can apply at sandstone oil reservoir or Carbonate Reservoir During Natural Depletion stage, reduces the uncertainty in reservoir sedimentary facies and reservoir communication evaluation study, for the injection-production well well site deployment in later stage provides guidance.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the embodiment of the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, is characterized in that, comprising:
Obtain the well location data of multiple oil well in oil reservoir, and the test pressure data of described multiple oil well;
Be the reduced pressure of described multiple oil well at synchronization by the test pressure data reduction of described multiple oil well;
Reduced pressure and well location entity relationship diagram is generated according to described well location data and described reduced pressure;
The connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division is evaluated according to described reduced pressure and well location entity relationship diagram.
2. method according to claim 1, is characterized in that, evaluates the connectedness of oil reservoir, comprising according to described reduced pressure and well location entity relationship diagram:
Described oil reservoir continuity is determined according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram; When reduced pressure variable quantity is between 0psi/1000m ~ 30psi/1000m, determining that oil reservoir continuity is good, when reduced pressure variable quantity is when being greater than 30psi/1000m, determining that oil reservoir continuity is poor.
3. method according to claim 1, is characterized in that, assists oil reservoir sedimentary facies division, comprising according to described reduced pressure and well location entity relationship diagram:
According to log, obtain the deposition phasor of described oil reservoir;
According to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram, the multiple oil wells in described oil reservoir are divided into multiple interval;
According to the result of the demarcation interval in described reduced pressure and well location entity relationship diagram, described deposition phasor correspondence is divided into multiple region;
According to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, the oil reservoir sedimentary facies after dividing is adjusted.
4. the method according to any one of claim 1-3, is characterized in that, obtains the well location data of oil well in oil reservoir, comprising:
Using the oil well of in described oil reservoir as benchmark oil well, obtain the relative well location data of the relatively described benchmark oil well of other oil wells;
Using the well location data of the relative well location data of acquisition as oil well.
5. method according to claim 4, is characterized in that, is the reduced pressure p of described oil well at synchronization according to following formula by the test pressure data reduction of described oil well
2:
Δp
1＝p
i-p
1；
Δp
2＝p
i-p
2；
Wherein, N
p1represent that oil well is at t
1the cumulative production in moment, unit m
3; N
p2represent that oil well is at t
2the cumulative production in moment, unit m
3; p
irepresent original formation pressure, units MPa; p
1represent that oil well is at t
1the test pressure in moment, units MPa; p
2represent that oil well is at t
2the reduced pressure in moment, units MPa; A is constant term.
6. method according to claim 5, is characterized in that, described oil well is pressure test well.
7. according to the method in claim 2 or 3, it is characterized in that, according to following formulae discovery reduced pressure variable quantity:
Wherein, Δ p represents reduced pressure variable quantity, unit psi/m; p
arepresent the reduced pressure of the first oil well, unit psi; p
brepresent the reduced pressure of the second oil well, unit psi; L
arepresent the well location data of the first oil well, unit m; L
brepresent the well location data of the second oil well, unit m.
8. method according to claim 3, is characterized in that, after adjusting the oil reservoir sedimentary facies after division, described method also comprises:
The connectedness of the sedimentary facies corresponding to oil reservoir is determined according to the connectedness of oil reservoir.
9. a device for auxiliary oil reservoir sedimentary facies division and Connectivity Evaluation, is characterized in that, comprising:
Pickup model, for obtaining the well location data of multiple oil well in oil reservoir, and the test pressure data of described multiple oil well;
Conversion module, for being the reduced pressure of described multiple oil well at synchronization by the test pressure data reduction of described multiple oil well;
Generation module, for generating reduced pressure and well location entity relationship diagram according to described well location data and described reduced pressure;
Evaluation module, for evaluating the connectedness of oil reservoir and/or auxiliary oil reservoir sedimentary facies division according to described reduced pressure and well location entity relationship diagram.
10. device according to claim 9, is characterized in that, described evaluation module comprises:
Acquiring unit, for according to log, obtains the deposition phasor of described oil reservoir;
First division unit, for being divided into multiple interval according to the reduced pressure variable quantity of oil well in described reduced pressure and well location entity relationship diagram by the multiple oil wells in described oil reservoir;
Second division unit, for the result according to the demarcation interval in described reduced pressure and well location entity relationship diagram, is divided into multiple region by described deposition phasor correspondence;
Adjustment unit, for according to the reduced pressure variable quantity between adjacent two mouthfuls of oil wells of adjacent interval in described reduced pressure and well location entity relationship diagram, adjusts the oil reservoir sedimentary facies after dividing.
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