CN105569647A - Generation method for reservoir characteristic value - Google Patents
Generation method for reservoir characteristic value Download PDFInfo
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- CN105569647A CN105569647A CN201410638004.2A CN201410638004A CN105569647A CN 105569647 A CN105569647 A CN 105569647A CN 201410638004 A CN201410638004 A CN 201410638004A CN 105569647 A CN105569647 A CN 105569647A
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Abstract
The invention discloses a generation method for reservoir characteristic values, belongs to the technical field of geological prospecting, and provides a method which can rapidly and effectively generate the characteristic value representing the characteristics of a reservoir. The generation method for reservoir characteristic values comprises: obtaining a logging curve of a physical quantity of a target well; obtaining well logging interpretation results and depth range thereof; in the logging curve, obtaining corresponding data of the depth range as to-be-processing data of the physical quantity; and processing the to-be-processing data, to generate the corresponding reservoir characteristic value.
Description
Technical field
The present invention relates to technical field of geological exploration, specifically, relate to a kind of generation method of reservoir characteristic value.
Background technology
Well log interpretation outcome table is each depth of reservoirs section at well log interpretation, according to certain generating mode (or rule), the log of target well is carried out value (or calculating), generates a numerical value list.User, by the reservoir characteristic value in this well log interpretation outcome table, is familiar with the feature of each reservoir of this target well required fast, quantitatively, thus analyzes understanding reservoir more accurately.
Inventor finds, the generation method of existing reservoir characteristic value is comparatively loaded down with trivial details, causes the hardware of the treatment facilities such as computer, software load comparatively large, is unfavorable for the formation efficiency improving well log interpretation outcome table.
Summary of the invention
The object of the present invention is to provide a kind of generation method of reservoir characteristic value, is a kind of method that can generate the characteristic value of the feature characterizing reservoir quickly and efficiently.
The invention provides a kind of generation method of reservoir characteristic value, the method comprises:
Obtain the log of a physical quantity of target well;
Obtain well log interpretation conclusion and depth bounds thereof;
In described log, obtain the corresponding data of depth bounds, as the pending data of this physical quantity;
Pending data are processed, generates corresponding reservoir characteristic value.
Described in described log, obtain the corresponding data of depth bounds, before the pending data as this physical quantity, also comprise:
Obtain every meter of presetting number of samples.
Described pending data to be processed, generate corresponding reservoir characteristic value and comprise:
According to depth bounds, calculate reservoir thickness;
According to described reservoir thickness, pending data are processed, generate corresponding reservoir characteristic value.
Described according to described reservoir thickness, pending data are processed, generates corresponding reservoir characteristic value and comprise:
If described reservoir thickness meets the first preset range, then obtain the maximum value of pending data, as the reservoir characteristic value of correspondence;
Or, if described reservoir thickness meets the second preset range, then obtain the minimum value of pending data, as the reservoir characteristic value of correspondence;
Or, if described reservoir thickness meets the 3rd preset range, then calculate the arithmetic mean of instantaneous value of pending data, as described reservoir characteristic value;
Or, if described reservoir thickness meets the 4th preset range, then calculate the geometrical mean of pending data, as described reservoir characteristic value.
Described first preset range, described second preset range, described 3rd preset range and described 4th preset range are non-intersect folded.
The well logging log of described target well is interval transit time, density, resistivity, degree of porosity, natural gamma energy spectrum or natural potential.
The reservoir characteristic value generated characterizes one in the interval transit time of this reservoir, density, resistivity, degree of porosity, natural gamma spectra and natural potential.
Described acquisition well log interpretation conclusion and depth bounds thereof comprise:
Obtain the well log interpretation conclusion inputted;
Travel through described log data, obtain the depth bounds of the well log interpretation conclusion inputted.
Present invention offers following beneficial effect: a kind of generation method providing reservoir characteristic value, the generation method of this reservoir characteristic value by obtaining well log interpretation conclusion and depth bounds thereof, and then generates the reservoir characteristic value of pending data and correspondence thereof.By only analyzing the reservoir characteristic value of well log interpretation conclusion, the fussy degree of the generation method of reservoir characteristic value can be reduced, reduce the computational burden for the treatment of facility, improve the formation efficiency of well log interpretation outcome table.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from manual, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in manual, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, accompanying drawing required in describing is done simple introduction below to embodiment:
Fig. 1 is the schematic flow sheet one of the generation method of the reservoir characteristic value that the embodiment of the present invention provides;
Fig. 2 is the schematic flow sheet two of the generation method of the reservoir characteristic value that the embodiment of the present invention provides;
Fig. 3 is the schematic flow sheet three of the generation method of the reservoir characteristic value that the embodiment of the present invention provides.
Detailed description of the invention
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
Embodiments provide a kind of generation method of reservoir characteristic value, as shown in Figure 1, the method comprises:
The log of one physical quantity of step S101, acquisition target well.
Well logging is the process that record pierces rock in a bite well of earth mantle or different physics, chemistry, electronics or other character of fluid mixture.The properties that well logging can obtain has: fluid flow and density in the resistivity of the density of rock, the interval transit time of rock, well different distance place rock, neutron absorption rate, rock or the natural potential at well liquid interface, the well size of boring in rock, well, with rock or relevant other character of borehole environment.Above-mentioned these are well-log information by the set of the character got of logging well.
Wherein, the acquisition methods of well-log information has a variety of, and electricity, sound, radioactivity are three kinds of basic skills.Specific process (as cable formation testing, dipmeter log, imaging logging, nuclear magnetic resonance log), other forms are as well logging during.Various logging method is indirectly substantially, reflects a certain side of formation geology characteristic conditionally.Want full appreciation subsurface geology looks, find and evaluate oil-gas Layer, needing comprehensively to use several well logging methods, and pay attention to drilling well, well logging primary data.
The curve characterizing well-log information is utilized to be log.Compared with well-log information, the storage of log is more convenient, shows more intuitive, clear simultaneously.
Concrete, the log of target well is interval transit time, density, resistivity, degree of porosity, natural gamma energy spectrum or nutural potential logging curve herein, obviously, log herein also can characterize other above-mentioned unlisted physical quantitys, and the embodiment of the present invention does not limit this.
The log obtained can process according to the input of user, selection, if user is non-selected, also can obtain successively according to preset rules, such as, first the log of interval transit time is obtained, secondly obtain log, the log of degree of porosity, the log of natural gamma spectra, the log of natural potential, the log etc. of resistivity of density successively, need the log obtained to be acquired complete until all.
Wherein, this preset rules can be in the process that user uses in reality, arrange according to factors such as self use habits, also can be that acquiescence presets.The embodiment of the present invention does not limit this.
The depth bounds of step S102, acquisition well log interpretation conclusion.
Concrete, this log can be traveled through, get well log interpretation conclusion.Wherein, well log interpretation conclusion has multiple, such as, be oil reservoir, gas-bearing formation, oil-water common-layer, the same layer of air water, Water Flooding Layer, oil-containing water layer, gassiness water layer, water layer, dried layer, possibility oil-gas Layer etc.
After getting well log interpretation conclusion, also need to obtain depth bounds corresponding to each well log interpretation conclusion.Such as, get an oil reservoir, and depth bounds corresponding to this oil reservoir is 235 meters to 254 meters.
Step S103, in described log, obtain the corresponding data of depth bounds, as the pending data of this physical quantity.
Concrete, before step S103, this method also can comprise: obtain every meter of presetting number of samples.
The situation that the size that each log all can characterize the value of a certain physical quantity changes with the change of the degree of depth, namely each log characterizes the situation of change of a certain physical quantity in a certain depth bounds.In the embodiment of the present invention, the number of the data that namely every meter of number of samples obtains in the curved section that each meter of depth bounds of log is corresponding, such as, can set every meter of sampling 8 or every meter of sampling 10.General, each data obtained are evenly distributed in this curved section.
Wherein, every meter of number of samples can set according to actual conditions, if curve is comparatively level and smooth, then in order to reduce the computing load for the treatment of facility, can consider to set every meter of less number of samples; If curve is comparatively tortuous, then in order to ensure that obtained reservoir characteristic value can accurately reflect this reservoir characteristics, can consider to set every meter of larger number of samples.
Step S104, pending data to be processed, generate corresponding reservoir characteristic value.
The reservoir characteristic value generated can characterize one in the interval transit time of this reservoir, density, resistivity, degree of porosity, the physical quantity such as natural gamma spectra and natural potential.Obviously, the reservoir characteristic value generated is corresponding with obtained log.
It should be noted that, if comprise multiple well log interpretation conclusion in curve simultaneously, method then disclosed in the embodiment of the present invention can process multiple well log interpretation conclusion simultaneously, obtain the reservoir characteristic value of depth bounds corresponding to each well log interpretation conclusion, also can carry out successively according to the depth size of layer corresponding to each well log interpretation conclusion.Specifically set according to actual conditions, the embodiment of the present invention does not limit this.
Further, as shown in Figure 2, step S104 specifically comprises:
Step S1041, according to depth bounds, calculate reservoir thickness.
Such as, the depth bounds of a certain oil reservoir is 105 meters to 120 meters, then the reservoir thickness of this oil reservoir is 15 meters.
Step S1042, according to described reservoir thickness, pending data to be processed, generate corresponding reservoir characteristic value.
In embodiments of the present invention, step S1042 can have several specific implementation forms following: if described reservoir thickness meets the first preset range, then obtain the maximum value of pending data, as the reservoir characteristic value of correspondence; Or, if described reservoir thickness meets the second preset range, then obtain the minimum value of pending data, as the reservoir characteristic value of correspondence; Or, if described reservoir thickness meets the 3rd preset range, then calculate the arithmetic mean of instantaneous value of pending data, the pending data corresponding by this depth bounds are added summation, that try to achieve be arithmetic mean of instantaneous value, as described reservoir characteristic value with the ratio of value and pending data number; Or, if described reservoir thickness meets the 4th preset range, then calculate the geometrical mean of pending data, be and pending data corresponding for this depth bounds are even taken advantage of quadrature, the product value of trying to achieve opens n power, wherein n is the number of pending data, can obtain geometrical mean, as described reservoir characteristic value.
Concrete, the order of accuarcy of the feature of curve corresponding to this depth bounds is characterized in order to improve arithmetic mean of instantaneous value, can consider when calculating arithmetic mean of instantaneous value, remove two data points and nearest apart from lower interface two data points that on distance reservoir, interface is nearest, then calculate the arithmetic mean of instantaneous value of remaining pending data.
It should be noted that, described first preset range, described second preset range, described 3rd preset range and described 4th preset range should be non-intersect folded.
Such as, can set reservoir thickness 0 to 3 meter as the first preset range, setting reservoir thickness 3 to 5 meters is as the second preset range, and setting reservoir thickness 5 to 10 meters is as the 3rd preset range, and setting reservoir thickness 10 to 15 meters is as the 4th preset range.The end value of each preset range can be arranged according to actual conditions.
It should be noted that, said method can be analyzed the log of multiple physical quantity simultaneously, namely obtain the log of interval transit time, density, resistivity, and the log corresponding to each physical quantity is analyzed, processed simultaneously, obtain corresponding reservoir characteristic value.
Obviously, how pending data are processed accordingly, can revise according to actual conditions, regional experience, and other processing method can be increased, also can consider to utilize wall scroll or many back-up curves to process pending data simultaneously.The embodiment of the present invention does not limit this.
After step s 104, judge whether the log, well log interpretation conclusion etc. that also there is Water demand, if also exist, repeat above-mentioned steps, until the log of all Water demand, well log interpretation conclusion etc. are analyzed, are disposed.And generating corresponding performance data table according to analysis, result, namely this performance data table can make user understand the reservoir situation of this well logging directly, legibly.
Similar, well log interpretation conclusion analyzed each time can be carried out according to the input of user, selection.Therefore, as shown in Figure 3, step S102 comprises:
The well log interpretation conclusion that step S1021, acquisition input.
Step S1022, travel through described log, obtain the depth bounds of the well log interpretation conclusion inputted.
Such as, user now have input " oil reservoir ", then treatment facility only looks for the depth bounds of oil reservoir in log.If there is not oil reservoir in this log, then the method that provides of the embodiment of the present invention is by playing target well to be processed or well log interpretation conclusion needed for the mode such as window, warning reminding user to replace.
Afterwards, judge whether the well log interpretation conclusion that still there are next user needs, if exist, then repeat above-mentioned two steps, until all well log interpretation conclusions obtain complete.
In sum, in the technical scheme of the embodiment of the present invention, provide a kind of generation method of reservoir characteristic value, the generation method of this reservoir characteristic value by obtaining well log interpretation conclusion and depth bounds thereof, and then generates the reservoir characteristic value of pending data and correspondence thereof.By only analyzing the reservoir characteristic value of well log interpretation conclusion, the fussy degree of the generation method of reservoir characteristic value can be reduced, reduce the computational burden for the treatment of facility, improve the formation efficiency of well log interpretation outcome table.
Although embodiment disclosed in this invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from spirit and scope disclosed in this invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (8)
1. a generation method for reservoir characteristic value, is characterized in that, comprising:
Obtain the log of a physical quantity of target well;
Obtain well log interpretation conclusion and depth bounds thereof;
In described log, obtain the corresponding data of depth bounds, as the pending data of this physical quantity;
Pending data are processed, generates corresponding reservoir characteristic value.
2. method according to claim 1, is characterized in that, described in described log, obtains the corresponding data of depth bounds, before the pending data as this physical quantity, also comprises:
Obtain every meter of presetting number of samples.
3. method according to claim 1, is characterized in that, describedly processes pending data, generates corresponding reservoir characteristic value and comprises:
According to depth bounds, calculate reservoir thickness;
According to described reservoir thickness, pending data are processed, generate corresponding reservoir characteristic value.
4. method according to claim 3, is characterized in that, described according to described reservoir thickness, processes pending data, generates corresponding reservoir characteristic value and comprises:
If described reservoir thickness meets the first preset range, then obtain the maximum value of pending data, as the reservoir characteristic value of correspondence;
Or, if described reservoir thickness meets the second preset range, then obtain the minimum value of pending data, as the reservoir characteristic value of correspondence;
Or, if described reservoir thickness meets the 3rd preset range, then calculate the arithmetic mean of instantaneous value of pending data, as described reservoir characteristic value;
Or, if described reservoir thickness meets the 4th preset range, then calculate the geometrical mean of pending data, as described reservoir characteristic value.
5. method according to claim 4, is characterized in that,
Described first preset range, described second preset range, described 3rd preset range and described 4th preset range are non-intersect folded.
6. method according to claim 1, is characterized in that,
The log of described target well characterizes interval transit time, density, resistivity, degree of porosity, natural gamma energy spectrum or natural potential.
7. method according to claim 6, is characterized in that,
The reservoir characteristic value generated characterizes one in the interval transit time of this reservoir, density, resistivity, degree of porosity, natural gamma spectra and natural potential.
8. method according to claim 1, is characterized in that, described acquisition well log interpretation conclusion and depth bounds thereof comprise:
Obtain the well log interpretation conclusion inputted;
Travel through described log data, obtain the depth bounds of the well log interpretation conclusion inputted.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111983722A (en) * | 2020-09-01 | 2020-11-24 | 中国石油天然气集团有限公司 | Reservoir logging characteristic parameter extraction method based on target preference coding |
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Application publication date: 20160511 |