CN105913332A - Method and device for determining dense gas reservoir development index - Google Patents
Method and device for determining dense gas reservoir development index Download PDFInfo
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- 238000011161 development Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims description 103
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Abstract
The application provides a method and a device for determining a dense gas reservoir development index, wherein the method comprises the following steps: determining a production area in an area to be developed; determining the average development index of the single well in the production area according to the reservoir characteristic parameters and the production dynamics of the single well in the production area; determining a distribution grid of a single well in the production area according to a preset rule; and determining an index for developing the compact gas reservoir in the production area according to the single-well average development index and the distribution grid. According to the method and the device for determining the development index of the dense gas reservoir, the development index of the dense gas reservoir can be determined according to the essential characteristics of the dense gas reservoir.
Description
Technical field
The application relates to construction of natural gas fields technical field, particularly to a kind of method and device determining tight gas reservoir development index.
Background technology
Normal gas pools refers mainly to middle and high infiltration gas reservoir, and gas reservoir internal connectivity is good, has obvious gas reservoir trap border, and gas well yield is relatively
Height, production rate-maintenance capability is the strongest.Tight gas reservoir (Tight Gas) refers to that permeability is less than the sandstone of 0.1 millidarcy (mD)
Reservoir natural gas pool, its distribution area is big, does not has obvious gas reservoir border, and reservoir permeability is poor, and anisotropism is strong, effective sand
Body dispersed and distributed, between have more compacted zone or shale layer barrier, poor connectivity, well yield is the most relatively low, gas well indicator difference
Greatly.Even if inside single net sandstone or stacked sand body, the not synsedimentary phase time that there is also falls to becoming silted up the impact of layer, and individual well loses heart model
Enclose and limits throughput, only use more rational well pattern, less well spacing and more well number, can be only achieved higher gas production rule
Mould and recovery percent of reserves.
Simultaneously as individual well loses heart, scope is less, and gas well production rate-maintenance capability is poor, and therefore, the stable yields in fine and close gas field is steady with individual well
Production capacity power difference is bigger.Further, since area is big, well number is many and individual well condition random is higher, the therefore each individual well of Accurate Prediction
Index there is great difficulty, the development index accurate simulation using method for numerical simulation to carry out full gas field is difficult to.Therefore,
Normal gas pools and tight gas reservoir reservoir are determined by substitutive characteristics and all there is bigger difference in each link of development index design
Different, for the development index of tight gas reservoir, it is impossible to apply mechanically the exploitation standard of existing normal gas pools, need innovative approach in addition real
Existing.
It should be noted that introduction to technical background above is intended merely to the convenient technical scheme to the application and carries out clear, complete
Illustrate, and facilitate the understanding of those skilled in the art to illustrate.Can not be merely because these schemes be in the background technology of the application
Part is set forth and thinks that technique scheme is known to those skilled in the art.
Summary of the invention
The purpose of the application embodiment is to provide a kind of method and device determining tight gas reservoir development index, with according to densification
The substitutive characteristics of gas reservoir, determines the development index of tight gas reservoir.
For achieving the above object, on the one hand the application provides a kind of method determining tight gas reservoir development index, and described method includes:
The reserves of candidate regions and the gas-bearing area corresponding with described reserves is determined in region to be developed；Calculate described candidate regions
Ratio between reserves and described gas-bearing area, and the described ratio calculated is determined more than or equal to the candidate regions of predetermined threshold value
For building producing region in described region to be developed；According to the described reservoir characteristic parameter building producing region and individual well Production development, determine described
Build the average development index of the individual well in producing region；Determine that individual well is at the described distribution grid built in producing region according to preset rules；According to institute
State the average development index of individual well and described distribution grid, determine the index that the described tight gas reservoir building producing region is developed.
For achieving the above object, on the other hand the application provides a kind of device determining tight gas reservoir development index, described device bag
Include: build producing region and determine unit, for determining the reserves of candidate regions and the gassiness face corresponding with described reserves in region to be developed
Long-pending；Calculate the ratio between the reserves of described candidate regions and described gas-bearing area, and the described ratio calculated is more than or equal to
What the candidate regions of predetermined threshold value was defined as in described region to be developed builds producing region；The average development index of individual well determines unit, for root
According to the described reservoir characteristic parameter building producing region and individual well Production development, determine described in build in producing region the average development index of individual well；Point
Gridding determines unit, for determining that individual well is at the described distribution grid built in producing region according to preset rules；Index determines unit,
For according to the average development index of described individual well and described distribution grid, determining and the described tight gas reservoir building producing region developed
Index.
The technical scheme provided from above the application embodiment, the one that the application provides determines tight gas reservoir development index
Method and device, first can meet tight gas according to building reservoir characteristic parameter and the individual well Production development in producing region to determine
Hide the average development index of individual well of feature.May then pass through and building the distribution grid determining individual well on producing region, such that it is able to building
The tight gas reservoir in producing region is developed.Finally can be determined described by described average development index and described distribution grid
Build the index that the tight gas reservoir in producing region is developed.Therefore, what the application provided a kind of determines tight gas reservoir development index
Method and device, it is possible to the feature of tight gas reservoir is analyzed, so that it is determined that the development index of tight gas reservoir.
With reference to explanation hereinafter and accompanying drawing, disclose in detail the particular implementation of the application, the principle specifying the application is permissible
Adopted mode.It should be understood that presently filed embodiment is not so limited in scope.In claims
Spirit and terms in the range of, presently filed embodiment includes many changes, revises and be equal to.
Describe for a kind of embodiment and/or the feature that illustrates can be in same or similar mode one or more other
Embodiment uses, combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term " includes/comprises " existence referring to feature, one integral piece, step or assembly herein when using, but not
Get rid of the existence of one or more further feature, one integral piece, step or assembly or additional.
Accompanying drawing explanation
Included accompanying drawing is used for providing being further understood from the application embodiment, which constitutes a part for description,
For illustrating presently filed embodiment, and with word, the principle coming together to explain the application is described.It should be evident that retouch below
Accompanying drawing in stating is only some embodiments of the application, for those of ordinary skill in the art, is not paying creativeness
On the premise of laborious, it is also possible to obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:
A kind of method flow diagram determining tight gas reservoir development index that Fig. 1 provides for the application；
Fig. 2 is the distribution grid of the individual well determined in the application one embodiment；
A kind of apparatus function module map determining tight gas reservoir development index that Fig. 3 provides for the application one embodiment.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the application, below in conjunction with the application embodiment
In accompanying drawing, the technical scheme in the application embodiment is clearly and completely described, it is clear that described embodiment party
Formula is only a part of embodiment of the application rather than whole embodiments.Based on the embodiment in the application, ability
Other embodiments all that territory those of ordinary skill is obtained under not making creative work premise, all should belong to this Shen
The scope that please protect.
A kind of method flow diagram determining tight gas reservoir development index that Fig. 1 provides for the application.Although flow process being described below include
The multiple operations occurred with particular order, but it should be clearly understood that these processes can include more or less of operation, this
A little operations can sequentially perform or executed in parallel (such as using parallel processor or multi-thread environment).As it is shown in figure 1, described side
Method may comprise steps of.
Step S1: determine the reserves of candidate regions and the gas-bearing area corresponding with described reserves in region to be developed；
Step S2: calculate the ratio between the reserves of described candidate regions and described gas-bearing area, and the described ratio calculated is more than
Or build producing region equal to what the candidate regions of predetermined threshold value was defined as in described region to be developed.
In the present embodiment, can include polylith gassiness region in described region to be developed, every piece of gassiness region all can be corresponding
Reserves and gas-bearing area.In the present embodiment, can by gassiness region being screened in described region to be developed, with
Filter out the region of gassiness enrichment.The region of described gassiness enrichment can be thought and described builds producing region.
In the application one embodiment, the reserves of candidate regions and corresponding with described reserves can be determined in region to be developed
Gas-bearing area, described candidate regions can be the gassiness region in described region to be developed.So, each candidate regions pair is being determined
After the reserves answered and gas-bearing area, the ratio between the reserves of described candidate regions and described gas-bearing area can be calculated.Calculate
Described ratio i.e. reserves abundance, can represent the dense degree of candidate regions gassiness.In the present embodiment, storage can be pre-set
The threshold value of amount abundance, this threshold value can be used to judge whether the reserves abundance of candidate regions meets condition.Be provided with predetermined threshold value it
After, the described ratio calculated can be built product more than or equal to what the candidate regions of predetermined threshold value was defined as in described region to be developed
District.
In the present embodiment, the gas accumulations distribution in described region to be developed can be indicated by layered map.Institute
Stating in layered map, can be represented the height of reserves abundance by the depth of color, color is the most shallow, represents reserves abundance more
Low, color is the deepest, represents reserves abundance the highest.So, layered map is being utilized to determine region to be developed to build producing region
Time, the pixel value in described layered map can be identified, and pixel value is met pre-conditioned pixel determine
For building the pixel in producing region.Specifically, if the color in described layered map be from shallow to deep by by Huang to red progressively
Gradual change, then can be according to R (red, the red) passage comprised in the pixel value of each pixel in described layered map
Numerical values recited judge whether this pixel is in high reserves abundance region.So, by R passage in each pixel
Numerical value judges, may thereby determine that out each pixel built in producing region.
Step S3: according to the described reservoir characteristic parameter building producing region and individual well Production development, determine described in build in producing region individual well put down
All development index.
In the present embodiment, being affected by reservoir conditions and engineering parameter, different single capacity of wells are the most different, therefore,
In the present embodiment, can according to the described reservoir characteristic parameter building producing region and individual well Production development, determine described in build in producing region
The average development index of individual well.Wherein, described reservoir characteristic can include that the rock type of reservoir, described rock type such as may be used
Think clastic rock class or carbonate rock, it is also possible to for pyroclastic rock class, metamorphic rock class, mud stone class or silicolites etc.
Deng.Described reservoir characteristic can also include diagenesis and pore character, and wherein, the pore character of reservoir is to control it to preserve gas
One of factor of body, diagenesis during pore evolution to the preservation of hole, grow or destroy and play a decisive role.
In the present embodiment, after the described reservoir characteristic parameter building producing region is analyzed, due to different types of individual well,
The parameters such as the maximum monolayer effective thickness of its correspondence, accumulative effective thickness, open-flow capacity and initial production all may be different, that
In the present embodiment, it may be determined that the criteria for classification of all kinds of individual wells.Specifically, during table 1 is the application one embodiment really
The criteria for classification of three fixed class individual wells.
Table 1 individual well criteria for classification
As can be seen from Table 1, the classification of individual well can by maximum monolayer effective thickness, accumulative effective thickness, open-flow capacity with
And initial production these four parameter divides, every class list capacity of well is different.In actual applications, due to by economic bar
The constraint of part, often described build producing region in be distributed various types of other individual well.So, in the present embodiment, in order to accurately
The development ability of gas reservoir in producing region is built described in weighing in ground, various types of other individual well can be carried out COMPREHENSIVE CALCULATING, with the list determined
The average development index of well.
In the present embodiment, after the criteria for classification determining all kinds of individual well, can first evaluate the weight that all kinds of individual well is corresponding
Coefficient.Described weight coefficient is the proportion that the quantity of various types of other individual well is shared in individual well total quantity, therefore, described weight
Coefficient is often the numerical value more than 0 and less than 1.In the present embodiment, such as I class well in table 1, it is corresponding
Weight coefficient be 30%, the weight coefficient that II class well is corresponding is 40%, and the weight coefficient that III class well is corresponding is 30%.Evaluate each
After the weight coefficient that class individual well is corresponding, then can according to all kinds of single well yields and shared weight coefficient, determine described in build product
The average development index of individual well in district.Specifically, in the present embodiment, can determine according to the following equation described in build in producing region
The average development index of individual well:
Wherein, σ be described in build in producing region the average development index of individual well, KiIt is the index of the i-th class individual well, xiIt it is the i-th class list
The weight coefficient that well is corresponding, U is the classification total amount of individual well.
For example, it is assumed that the yield that in table 1, I class well is corresponding is 2 × 104m3/ d, the yield that II class well is corresponding is 1.0 × 104m3/ d,
The yield that III class well is corresponding is 0.5 × 104m3/ d, then can be according to the average development index of individual well that above formula calculates:
2 × 0.3+1 × 0.4+0.5 × 0.3=1.15 × 104m3/d
Refer to table 2.Table 2 shows the average development index that in the application one embodiment, three class difference individual wells are corresponding.
The average development index that table 2 three class difference individual well is corresponding
From Table 2, it can be seen that the average development index of described individual well can be relevant to the time limit of stable yields, for different stable yields
The time limit, corresponding average development index also tends to difference.
Step S4: determine that individual well is at the described distribution grid built in producing region according to preset rules.
In the present embodiment, it is contemplated that individual well often directly affects the exploitation effect of gas reservoir at the described distribution rule built in producing region
Benefit.Such as, if being distributed too much individual well in building producing region, then not only can not make full use of each single capacity of well,
The most also raising is drilled the cost of the gentle well servicing of well so that the benefit comparison of gas reservoir development is low.If but building producing region
The individual well that middle distribution is very few, then just the gas reservoir of enrichment cannot be developed effectively, the benefit of gas reservoir development can be made equally
The lowest.Therefore, in the present embodiment, can according to preset rules determine individual well at the described distribution grid built in producing region,
To guarantee to produce higher gas reservoir development benefit.
Specifically, in the present embodiment, described individual well can be limited by two parameters at the described distribution grid built in producing region.
Wherein, a parameter is the well spacing between adjacent individual well, and another parameter is the well pattern type of individual well.The well pattern class of described individual well
Type can be such as square pattern or staggered well pattern.Therefore, in the present embodiment, preset rules can be first according to determine
The described well spacing built in producing region between individual well.Specifically, in the present embodiment, can determine according to the following equation described in build product
Well spacing between individual well in district:
Where it is assumed that it is circular or oval that gas well bores the net sandstone met, LaFor the described well spacing built in producing region between individual well,
LbFor described well array of building in producing region away from (Lb≥La), N represent described in build the reserves in producing region, T represents dynamic investment return period,
ERRepresenting the recovery percent of reserves at dynamic investment return period end, C represents natural gas commodity rate, and P represents that gas price, O represent that natural gas becomes
This valency, T represents that the expenses of taxation, A represent gas-bearing area, IDRepresent individual well drilling well investment, IBRepresent the investment of individual well surface construction, r
Represent loan rate.
Therefore, the well spacing between individual well with build producing region reserves abundance, the recovery percent of reserves of investment payback time and the cost of individual well
Related.In general, the gas reservoir of Thief zone, well yield is high, and the investment payback time is shorter, the extraction journey in the investment payback time
Spending less, corresponding well spacing is the biggest, and the density of namely individual well distribution is diluter, on the contrary, and the well that the gas reservoir of hyposmosis is corresponding
Away from the least, it is intensive the closeest that individual well is distributed.
In the present embodiment, at the initial stage of development of gas reservoir, due to not enough to the understanding of gas reservoir, may determine and not exclusively
It is suitable for the well spacing currently building between the individual well in producing region.So in such a case, it is possible in advance the individual well well spacing building producing region is designed
Obtain larger, the individual well negligible amounts of distribution.So, when the later stage is along with to the understanding of gas reservoir progressively deeply, can basis in time
Actual result, encrypts individual well, to improve the gas well controlling extent to reserves between sparse individual well.
In the present embodiment, after determining the well spacing between individual well, can be according to the described geologic parameter building producing region, really
The well pattern type of individual well in producing region is built described in Ding.In the present embodiment, the well pattern type of described individual well can be square pattern or
Person's staggered well pattern.Wherein, the individual well in described square pattern can square be distributed, and the individual well in described staggered well pattern can
To be distributed in equilateral triangle.Certainly, certain permeability side may be presented in a certain direction owing to building the geologic parameter in producing region
Tropism, then in actual application scenarios, can do described square pattern or staggered well pattern on the direction of permeability maximum
Suitably stretch or on the direction of permeability minimum, do suitably compression, so that rectangular point of the individual well in square pattern
Cloth, and the individual well in staggered well pattern is isosceles triangle distribution.So, at the well spacing determined between individual well and the well of individual well
After net type, just described building, producing region can determine the distribution grid of individual well.
Refer to Fig. 2.Fig. 2 is the distribution grid of the individual well determined in the application one embodiment.From Figure 2 it can be seen that it is described
The well pattern type of individual well is staggered well pattern, and due to this, to build the permeability in producing region maximum at longitudinal direction, therefore can be by this staggered well
Net stretches along the longitudinal direction, so that the well spacing between longitudinal individual well is more than the well spacing between horizontal individual well.Wherein, the most single
Well spacing between well can be 800 meters, and the well spacing of this longitudinal direction just can be the array pitch shown in Fig. 2；And laterally between individual well
Well spacing can be 600 meters, and this horizontal well spacing just can be the well spacing shown in Fig. 2.
Step S5: according to the average development index of described individual well and described distribution grid, determine the described tight gas reservoir building producing region
The index developed.
In the present embodiment, when described build producing region determines individual well distribution grid and the average development index of individual well
After, just the described tight gas reservoir building producing region can be developed.During exploitation, due to by individual well index, shaft building
Order and the impact of development phase, the predicting the outcome of exploitation also tends to different.In the present embodiment, can be for not
Same individual well index and shaft building order, determine the candidate's index to the predetermined number that the described tight gas reservoir building producing region is developed.
Specifically, four kinds of different candidate's indexs during table 3 shows the application one embodiment.
3 four kinds of candidate's indexs of table
In the present embodiment, according to candidate's index that these four is different, can dope in exploitation corresponding to different development phases
Result.Table 4 shows the development result according to above-mentioned four kinds of Forecasting Development Index of Gas Reservoirs.
Predicting the outcome of 4 four kinds of candidate's indexs of table
As can be seen from Table 4, due in four kinds of gas reservoir candidate's indexs shaft building order the most different with individual well index, then build term,
Stable production period and development result corresponding to decline period are the most different.In the present embodiment, can according to build term, stable production period and
Total predicts the outcome, and determines optimal development index from four kinds of candidate's indexs.Specifically, in described total predicts the outcome,
Production time, accumulative brill shaft building number, accumulative aerogenesis can be included, employ oil in place and these parameters of recovery ratio, the most often
Individual parameter all correspond to concrete numerical value in every kind of different candidate's index.In the present embodiment, these parameters can be drawn
Being divided into positive parameter and passive parameter, wherein actively the meaning of parameter is that the numerical value of parameter is the biggest, it was predicted that result the best；And
The meaning of passive parameter is that the numerical value of parameter is the biggest, it was predicted that result the poorest.Such as, for five above-mentioned parameters, permissible
Accumulative brill shaft building number is defined as passive parameter, and other four parameters may determine that as positive parameter.
After being divided into positive parameter and passive parameter, can be the different weight coefficients of these parametric distributions.It is then possible to
Calculate the judge eigenvalue that different development result is corresponding according to the following equation:
Wherein, the judge eigenvalue that development index that β is different is corresponding, LqFor the numerical value that the positive parameter of q-th is corresponding, yqFor
The weight coefficient that the positive parameter of q-th is corresponding, FsIt is numerical value corresponding to the s passive parameter, gsIt is the s passive parameter pair
The weight coefficient answered, b is the number of passive parameter, and z is the number of positive parameter.
So, the judge eigenvalue calculated is the biggest, then illustrate that predicting the outcome of corresponding development index is the best.So, at this
In embodiment, can will pass judgment on what the maximum candidate's index of eigenvalue be defined as developing the described tight gas reservoir building producing region
Index.
If add up to prediction index calculate eigenvalue identical or identical, can according to build aerogenesis bore shaft building number, time stable production period,
Annual capacity and the stable yields end of term these parameters of recovery percent of reserves are passed judgment on again.In the present embodiment, to aforementioned four parameter, can
Boring shaft building number term be defined as passive parameter building, other three parameters may determine that as positive parameter, the most above-mentioned judge
Eigenvalue calculates, and passes judgment on feature the biggest, then illustrate that predicting the outcome of corresponding development index is the best.Stable yields to be considered
Time phase, the industry requirement of annual capacity stable production period.
The technical scheme provided from above the application embodiment, the one that the application provides determines tight gas reservoir development index
Method, first can meet tight gas reservoir feature according to building reservoir characteristic parameter and the individual well Production development in producing region to determine
The average development index of individual well.May then pass through and building the distribution grid determining individual well on producing region, such that it is able to building producing region
Tight gas reservoir is developed.Finally can determine and build producing region by described average development index and described distribution grid to described
The index developed of tight gas reservoir.Therefore, a kind of method determining tight gas reservoir development index that the application provides,
The feature of tight gas reservoir can be analyzed, so that it is determined that the development index of tight gas reservoir.
The application embodiment also provides for a kind of device determining tight gas reservoir development index.Referring to Fig. 3, described device is permissible
Including:
Build producing region and determine unit 100, for determining the reserves of candidate regions and contain corresponding with described reserves in region to be developed
Gas area；Calculate the ratio between the reserves of described candidate regions and described gas-bearing area, and by the described ratio that calculates more than or
Producing region is built equal to what the candidate regions of predetermined threshold value was defined as in described region to be developed；
The average development index of individual well determines unit 200, for building reservoir characteristic parameter and the individual well Production development in producing region described in basis,
The average development index of the individual well in producing region is built described in determining；
Distribution grid determines unit 300, for determining that individual well is at the described distribution grid built in producing region according to preset rules；
Index determines unit 400, for according to the average development index of described individual well and described distribution grid, determines and builds described
The index that the tight gas reservoir in producing region is developed.
In the application one preferred implementation, the average development index of described individual well determines that unit 200 specifically includes:
Criteria for classification determines module, for building reservoir characteristic parameter and the individual well Production development in producing region described in basis, determines all kinds of list
The criteria for classification of well；
Sort module, for according to described criteria for classification, determine described in build in producing region the classification belonging to individual well；
Weight coefficient determines module, for accounting for the ratio of total well number according to all kinds of Jing Jing numbers in brought in well, determines all kinds of individual well pair
The weight coefficient answered；
Determine module, for according to weight coefficient corresponding to all kinds of single well yields and all kinds of individual well, determine described in build in producing region
The average development index of individual well.
In the application one preferred implementation, described distribution grid determines that unit 300 specifically includes:
Well spacing determines module, the well spacing building in producing region between individual well described in determine according to preset rules；
Well pattern determination type module, for according to described in build the geologic parameter in producing region, determine described in build the well pattern class of individual well in producing region
Type；
Distribution grid determines module, for according to described well spacing and described well pattern type, determining dividing of individual well described building in producing region
Gridding.
In the application one preferred implementation, described index determines that unit 400 specifically includes:
Candidate's index determines module, for according to the average development index of described individual well and described distribution grid, determines and builds described
Candidate's index of the predetermined number that the tight gas reservoir in producing region is developed；
Prediction of result module, for according to described candidate's index, it was predicted that utilize described candidate's index to develop described producing region of building
Result；
Pass judgment on characteristic value calculating module, calculate the judge eigenvalue corresponding with described candidate's index for the result according to prediction；
Development index determines module, for being defined as building producing region to described by candidate's index that the described judge eigenvalue calculated is maximum
The index developed of tight gas reservoir.
It should be noted that the specific implementation of each functional module above-mentioned is all consistent with the description in step S1 to S5, this
In just repeat no more.
The technical scheme provided from above the application embodiment, the one that the application provides determines tight gas reservoir development index
Device, first can meet tight gas reservoir feature according to building reservoir characteristic parameter and the individual well Production development in producing region to determine
The average development index of individual well.May then pass through and building the distribution grid determining individual well on producing region, such that it is able to building producing region
Tight gas reservoir is developed.Finally can determine and build producing region by described average development index and described distribution grid to described
The index developed of tight gas reservoir.Therefore, a kind of device determining tight gas reservoir development index that the application provides,
The feature of tight gas reservoir can be analyzed, so that it is determined that the development index of tight gas reservoir.
Above the describing of various embodiments of the application is supplied to those skilled in the art with the purpose described.It is not intended to
Exhaustive or be not intended to limit the invention to single disclosed embodiment.As it has been described above, the various replacements of the application and
Change will be apparent from for above-mentioned technology one of ordinary skill in the art.Therefore, although specifically discuss
The embodiment of alternative, but other embodiment will be apparent from, or those skilled in the art relatively easily draw.
The application is intended to be included in all replacements of this present invention discussed, amendment and change, and falls in above-mentioned application
Other embodiment in spirit and scope.
Each embodiment in this specification all uses the mode gone forward one by one to describe, identical similar part between each embodiment
Seeing mutually, what each embodiment stressed is the difference with other embodiments.Especially for device
For embodiment, owing to it is substantially similar to method embodiment, so describe is fairly simple, relevant part sees method
The part of embodiment illustrates.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application has many deformation and change
Without deviating from spirit herein, it is desirable to appended claim includes that these deformation and change are without deviating from spirit herein.
Claims (10)
1. the method determining tight gas reservoir development index, it is characterised in that including:
The reserves of candidate regions and the gas-bearing area corresponding with described reserves is determined in region to be developed；
Calculate the ratio between the reserves of described candidate regions and described gas-bearing area, and the described ratio calculated is more than or equal to
What the candidate regions of predetermined threshold value was defined as in described region to be developed builds producing region；
According to the described reservoir characteristic parameter building producing region and individual well Production development, determine described in build in producing region individual well averagely develop and refer to
Mark；
Determine that individual well is at the described distribution grid built in producing region according to preset rules；
According to the average development index of described individual well and described distribution grid, determine and the described tight gas reservoir building producing region is developed
Index.
Method the most according to claim 1, it is characterised in that according to the described reservoir characteristic parameter building producing region and individual well
Production development, determine described in build in producing region the average development index of individual well specifically include:
According to the described reservoir characteristic parameter building producing region and individual well Production development, determine the criteria for classification of individual well；
According to described criteria for classification, determine described in build in producing region the classification belonging to individual well；
Account for the ratio of total well number according to Jing Jing numbers all kinds of in brought in well, determine the weight coefficient that all kinds of individual well is corresponding；
According to the weight coefficient that all kinds of single well yields and all kinds of individual well are corresponding, determine described in build in producing region individual well averagely develop
Index.
Method the most according to claim 2, it is characterised in that build the individual well in producing region described in determining according to the following equation
Average development index:
Wherein, σ be described in build in producing region the average development index of individual well, KiIt is the i-th class list well yield, xiIt it is the i-th class list
The weight coefficient that well is corresponding, U is the classification total amount of individual well.
Method the most according to claim 1, it is characterised in that determine that individual well is built in producing region described according to preset rules
Distribution grid specifically include:
According to preset rules determine described in build in producing region between individual well well spacing；
According to the described geologic parameter building producing region, determine described in build the well pattern type of individual well in producing region；
According to described well spacing and described well pattern type, described building, producing region determines the distribution grid of individual well.
Method the most according to claim 4, it is characterised in that described according to preset rules determine described in build in producing region single
Well spacing between well specifically includes:
The well spacing between individual well in producing region is built described in determining according to the following equation:
Where it is assumed that it is circular or oval that gas well bores the net sandstone met, LaFor the described well spacing built in producing region between individual well,
LbFor described well array of building in producing region away from (Lb≥La), N represent described in build the reserves in producing region, T represents dynamic investment return period,
ERRepresenting the recovery percent of reserves at dynamic investment return period end, C represents natural gas commodity rate, and P represents that gas price, O represent that natural gas becomes
This valency, T represents that the expenses of taxation, A represent gas-bearing area, IDRepresent individual well drilling well investment, IBRepresent the investment of individual well surface construction, r
Represent loan rate.
Method the most according to claim 1, it is characterised in that according to the average development index of described individual well and described point
Gridding, determines that the index developing the described tight gas reservoir building producing region specifically includes:
According to the average development index of described individual well and described distribution grid, determine and the described tight gas reservoir building producing region is developed
Candidate's index of predetermined number；
According to described candidate's index, it was predicted that utilize described candidate's index to build, to described, the result that producing region is developed；
Result according to prediction calculates the judge eigenvalue corresponding with described candidate's index；
It is defined as candidate's index maximum for the described judge eigenvalue calculated the described tight gas reservoir building producing region is developed
Index.
7. the device determining tight gas reservoir development index, it is characterised in that including:
Build producing region and determine unit, for determining the reserves of candidate regions and the gassiness face corresponding with described reserves in region to be developed
Long-pending；Calculate the ratio between the reserves of described candidate regions and described gas-bearing area, and the described ratio calculated is more than or equal to
What the candidate regions of predetermined threshold value was defined as in described region to be developed builds producing region；
The average development index of individual well determines unit, for building reservoir characteristic parameter and the individual well Production development in producing region described in basis, really
The average development index of the individual well in producing region is built described in Ding；
Distribution grid determines unit, for determining that individual well is at the described distribution grid built in producing region according to preset rules；
Index determines unit, for according to the average development index of described individual well and described distribution grid, determines and builds producing region to described
The index developed of tight gas reservoir.
Device the most according to claim 7, it is characterised in that the average development index of described individual well determines that unit specifically wraps
Include:
Criteria for classification determines module, for building reservoir characteristic parameter and the individual well Production development in producing region described in basis, determines all kinds of list
The criteria for classification of well；
Sort module, for according to described criteria for classification, determine described in build in producing region the classification belonging to individual well；
Weight coefficient determines module, for accounting for the ratio of total well number according to all kinds of Jing Jing numbers in brought in well, determines all kinds of individual well pair
The weight coefficient answered；
Determine module, for according to weight coefficient corresponding to all kinds of single well yields and all kinds of individual well, determine described in build in producing region
The average development index of individual well.
Device the most according to claim 7, it is characterised in that described distribution grid determines that unit specifically includes:
Well spacing determines module, the well spacing building in producing region between individual well described in determine according to preset rules；
Well pattern determination type module, for according to described in build the geologic parameter in producing region, determine described in build the well pattern class of individual well in producing region
Type；
Distribution grid determines module, for according to described well spacing and described well pattern type, determining dividing of individual well described building in producing region
Gridding.
Device the most according to claim 7, it is characterised in that described index determines that unit specifically includes:
Candidate's index determines module, for according to the average development index of described individual well and described distribution grid, determines and builds described
Candidate's index of the predetermined number that the tight gas reservoir in producing region is developed；
Prediction of result module, for according to described candidate's index, it was predicted that utilize described candidate's index to develop described producing region of building
Result；
Pass judgment on characteristic value calculating module, calculate the judge eigenvalue corresponding with described candidate's index for the result according to prediction；
Development index determines module, for being defined as building producing region to described by candidate's index that the described judge eigenvalue calculated is maximum
The index developed of tight gas reservoir.
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| CN107676073B (en) * | 2017-08-17 | 2020-06-09 | 中国石油天然气股份有限公司 | Method and apparatus for well pattern deployment |
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| CN110318741A (en) * | 2018-03-28 | 2019-10-11 | 中国石油化工股份有限公司 | A kind of abnormal high pressure, High water cut densification low permeability gas reservoirs Residual gas distribution describe method |
| CN109630102A (en) * | 2018-11-28 | 2019-04-16 | 郭建林 | Each layer gas-bearing area measuring method of multilayer system Low permeability and competent sand gas well |
| CN109655934A (en) * | 2018-11-28 | 2019-04-19 | 郭建林 | Tight gas reservoir gas-bearing area measuring method based on gas-bearing formation Drilling ratio |
| CN109356577A (en) * | 2018-11-28 | 2019-02-19 | 冀光 | Tight gas reservoir reserves measuring method based on gas-bearing formation Drilling ratio |
| CN109356577B (en) * | 2018-11-28 | 2022-03-11 | 冀光 | Compact gas reservoir reserve determination method based on gas layer drilling rate |
| CN109630102B (en) * | 2018-11-28 | 2022-11-11 | 郭建林 | Method for measuring gas-containing area of each layer of multilayer low-permeability tight sandstone gas well |
| CN111310339A (en) * | 2020-02-19 | 2020-06-19 | 西南石油大学 | Equivalent time corrected typical curve generation method for variable reserve system |
| CN111310339B (en) * | 2020-02-19 | 2020-12-04 | 西南石油大学 | Equivalent time corrected typical curve generation method for variable reserve system |
| CN112031757A (en) * | 2020-09-08 | 2020-12-04 | 中国石油天然气股份有限公司 | Method for evaluating encryption potential of tight gas reservoir well pattern |
| CN112031757B (en) * | 2020-09-08 | 2023-07-25 | 中国石油天然气股份有限公司 | Method for evaluating encryption potential of tight gas reservoir well pattern |
| CN113761743A (en) * | 2021-09-07 | 2021-12-07 | 中国地质大学（北京） | Method and device for calculating regional shale gas reserves, terminal equipment and storage medium |
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