CN108959679A - Evaluation method and evaluation device for fracturing effect of shale gas well - Google Patents
Evaluation method and evaluation device for fracturing effect of shale gas well Download PDFInfo
- Publication number
- CN108959679A CN108959679A CN201810225668.4A CN201810225668A CN108959679A CN 108959679 A CN108959679 A CN 108959679A CN 201810225668 A CN201810225668 A CN 201810225668A CN 108959679 A CN108959679 A CN 108959679A
- Authority
- CN
- China
- Prior art keywords
- fracturing
- gas well
- shale gas
- volume
- post
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000694 effects Effects 0.000 title claims abstract description 53
- 238000011156 evaluation Methods 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 230000001186 cumulative effect Effects 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 238000004364 calculation method Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 10
- 239000012071 phase Substances 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- 230000009466 transformation Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000013210 evaluation model Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Theoretical Computer Science (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an evaluation method and an evaluation device for the fracturing effect of a shale gas well, and relates to the technical field of hydraulic fracturing construction. According to the evaluation method and the evaluation device provided by the embodiment of the invention, firstly, a calculation model of the effective fracture volume established based on a material balance theory is obtained, then the fractured flowback data is substituted into the calculation model to obtain the effective fracture volume of the shale gas well after fracturing, the fractured flowback data is the first-hand data which can be obtained after fracturing the gas well, and the flowback data of the gas well is characterized by indirect reflection of the fracturing modification effect, so that the effective fracture volume obtained by the algorithm can be used for more accurately evaluating the fracturing effect of the shale gas well.
Description
Technical field
The present invention relates to hydraulic fracturing technical field of construction, in particular to a kind of evaluation method of shale gas well fracturing effect
And evaluating apparatus.
Background technique
Fracture technology is the technical way currently used for shale gas reservoir exploitation.Pass through the experience table of on-site development
Bright, in addition to the property of shale gas reservoir reservoir itself, the fracturing transformation effect of shale gas well is the main of influence shale gas well deliverability
Factor.Therefore, the fracturing transformation effect for evaluating shale gas well, for determining that shale gas well capacity has very important work
With.
In the prior art, microseismic is generallyd use to evaluate the fracturing transformation effect of shale gas well, that is, is led to
Acquisition microseismic signals are crossed, microseismic signals collected are handled and explained, fracture parameters information is acquired, utilizes crack
Parameter information evaluates shale gas well fracturing transformation effect.
Inventor discovery in the prior art the prior art has at least the following problems:
Fracture parameters information is obtained using microseismic in the prior art to evaluate shale gas well fracturing reform effect
The technical method of fruit, after actual verification, discovery determines that shale gas production capacity and actual shale gas produce using the evaluation method
There can be larger gap, obtained evaluation conclusion is not accurate enough.
Summary of the invention
The present invention provides a kind of shale gas well fracturing effect of effective fracture calculation method of physical volume after the gas well fracturing based on shale
The evaluation method and evaluating apparatus of fruit, can solve above-mentioned technical problem.
Specifically, including technical solution below:
On the one hand, a kind of evaluation method of shale gas well fracturing effect is provided, comprising the following steps:
Obtain the computation model for the effective fracture volume established based on material balance theory；
Obtain that shale gas well is post-fracturing returns number of rows evidence；
Based on the computation model of the effective fracture volume, number of rows evidence is returned according to the shale gas well is post-fracturing, is calculated
Obtain the post-fracturing effective fracture volume of shale gas well；
According to the post-fracturing effective fracture volume of the shale gas well, the fracturing effect of shale gas well is evaluated.
In a kind of possible design, the calculating mould for obtaining the effective fracture volume established based on material balance theory
Type, comprising:
Based on the material balance theory, the matter balance equation of crevice volume after shale gas well fracturing is established；
According to the matter balance equation of crevice volume after the shale gas well fracturing, it is post-fracturing described to obtain shale gas well
The computation model of effective fracture volume.
In a kind of possible design, the matter balance equation of crevice volume after the shale gas well fracturing are as follows:
GpBg+WpBw=Gfi(Bg-Bgi)+Wfi(Bw-Bwi)+ΔVf；
Wherein, GpIndicate the cumulative gas production of each moment t；BgIndicate the gas volume factor of each moment t；WpIt indicates
Cumulative liquid production；BwIndicate the water volume coefficient of each moment t；GfiIndicate gas volume in initial time crack；BgiIt indicates just
Begin moment gas volume factor；WfiIndicate water volume in initial time crack；BwiIndicate initial time water volume coefficient；△VfFor
Crack closure volume of the initial time to each moment t.
In a kind of possible design, the computation model of the effective fracture volume are as follows:
Wherein, CwIndicate the water compressed coefficient；CfIndicate the crack compressed coefficient；pfiIndicate pressure in initial time crack；pfTable
Show pressure in the crack of each moment t；SgiIndicate initial time gas phase saturation；VfiIndicate initial time crevice volume.
In a kind of possible design, the hydraulic pressure coefficient CwValue range are as follows: (3.4-5.0) × 10-4MPa-1。
In a kind of possible design, the crack compressed coefficient CfValue range are as follows: 0.001-0.01MPa-1。
In a kind of possible design, the acquisition shale gas well is post-fracturing to return number of rows evidence, comprising:
Obtain the row's of returning data of shale gas well；
According to the row's of returning data of the shale gas well, the post-fracturing closing stage of shale gas well is determined；
According to the row's of returning data of the corresponding shale gas well of the closing stage after the rock gas well fracturing, the page is obtained
Number of rows evidence is returned after rock gas well fracturing.
In a kind of possible design, the row's of returning data according to the shale gas well, after determining shale gas well fracturing
Closing stage, comprising:
It is pre- for choosing the data information that surface casing pressure changes a stable period in the row's of returning data of the shale gas well
Select data；
According to the pre-selection data, bottom pressure p is calculated using Beggs-Brill methodwfAnd gas is under downhole condition
Deviation factors Z；Cumulative gas G is calculated using the method fluxionsp；
P is drawn under rectangular coordinate systemwf/ Z and cumulative gas GpRelation curve, if the relation curve be straight line,
Then determine that the pre-selection data corresponding period is the post-fracturing closing stage of shale gas well.
In a kind of possible design, the computation model based on the effective fracture volume, according to the shale gas
Well is post-fracturing to return number of rows evidence, and the post-fracturing effective fracture volume of shale gas well is calculated, comprising:
Based on the computation model of the effective fracture volume, number of rows evidence is returned according to the shale gas well is post-fracturing, calculates y
With the value of x, wherein the y is GpBg+WpBw, x is
The relation curve of y-x is drawn under plane right-angle coordinate；
The relation curve of the y-x is fitted to the straight line for crossing origin, using the slope of the straight line as the page
Effective fracture volume after rock gas well fracturing.
On the other hand, a kind of evaluating apparatus of shale gas well fracturing effect is provided, described device includes:
First obtains module, for obtaining the computation model for the effective fracture volume established based on material balance theory；
Second obtains module, and for obtaining, shale gas well is post-fracturing to return number of rows evidence；
Computing module, it is post-fracturing according to the shale gas well for the computation model based on the effective fracture volume
Number of rows evidence is returned, the post-fracturing effective fracture volume of shale gas well is calculated；
Evaluation module, for evaluating the pressure break of shale gas well according to the post-fracturing effective fracture volume of the shale gas well
Effect.
Technical solution provided in an embodiment of the present invention the utility model has the advantages that
Evaluation method provided in an embodiment of the present invention and evaluating apparatus, obtain is had based on what material balance theory was established first
The computation model of crevice volume is imitated, the post-fracturing number of rows of returning of shale gas well is then obtained into page according to being updated in the computation model
Effective fracture volume after rock gas well fracturing, since post-fracturing number of rows of returning is according to being the first-hand money that can be obtained after gas well fracturing
Material, gas well return number of rows according to the indirect reflection for being characterized in fracturing transformation effect, and thus obtained effective fracture volume can be more quasi-
Really evaluate the fracturing effect of shale gas well.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of schematic diagram of the evaluation method of shale gas well fracturing effect provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of the evaluating apparatus of shale gas well fracturing effect provided in an embodiment of the present invention；
Fig. 3 is Changning shale gas field H1 well early stage p in the embodiment of the present inventionwf/ Z~Gp relation curve schematic diagram；
Fig. 4 is the y-x relation curve schematic diagram of Changning shale gas field H1 well in the embodiment of the present invention；
Fig. 5 is the y-x relation curve schematic diagram of Changning shale gas field H2 well in the embodiment of the present invention；
Fig. 6 is the y-x relation curve schematic diagram of Changning shale gas field H3 well in the embodiment of the present invention；
Fig. 7 is the y-x relation curve schematic diagram of Changning shale gas field H4 well in the embodiment of the present invention；
Fig. 8 is the y-x relation curve schematic diagram of Changning shale gas field H5 well in the embodiment of the present invention；
Fig. 9 is the y-x relation curve schematic diagram of Changning shale gas field H6 well in the embodiment of the present invention；
Figure 10 is the pass of the fracturing fluid injected slurry volume of Changning shale gas field H1-H6 well and test yield in the embodiment of the present invention
It is curve synoptic diagram；
Figure 11 is the relationship of the effective fracture volume of Changning shale gas field H1-H6 well and test yield in the embodiment of the present invention
Curve synoptic diagram；
Figure 12 is the effective fracture volume and First Year average product of Changning shale gas field H1-H6 well in the embodiment of the present invention
Relation curve schematic diagram；
Figure 13 is the effective fracture volume of Changning shale gas field H1-H6 well and the relation curve of EUR in the embodiment of the present invention
Schematic diagram.
Specific embodiment
To keep technical solution of the present invention and advantage clearer, below in conjunction with attached drawing to embodiment of the present invention make into
One step it is described in detail.Unless otherwise defined, all technical terms used in the embodiment of the present invention all have and art technology
The normally understood identical meaning of personnel.
On the one hand, the embodiment of the present invention provides a kind of evaluation method of shale gas well fracturing effect, as shown in Figure 1, including
Following steps:
The computation model for the effective fracture volume that step 101, acquisition are established based on material balance theory；
Step 102 obtains that shale gas well is post-fracturing returns number of rows evidence；
Step 103, the computation model based on effective fracture volume are returned number of rows evidence according to shale gas well is post-fracturing, are calculated
Obtain the post-fracturing effective fracture volume of shale gas well；
Step 104, according to the post-fracturing effective fracture volume of shale gas well, evaluate the fracturing effect of shale gas well.
Evaluation method provided in an embodiment of the present invention obtains the effective fracture volume established based on material balance theory first
Computation model, the post-fracturing number of rows of returning of shale gas well is then obtained into shale gas well fracturing according to being updated in the computation model
Effective fracture volume afterwards, since post-fracturing number of rows of returning is according to being the firsthand information that can be obtained after gas well fracturing, gas well is returned
Number of rows can more accurately evaluate shale according to the indirect reflection for being characterized in fracturing transformation effect, thus obtained effective fracture volume
The fracturing effect of gas well.
It should be noted that fluid flow has tribute during the row of returning that drives a well after effective fracture volume refers to gas well fracturing
The part crevice volume for offering effect does not include in the open state but closed when driving a well the row of returning during fracturing reform
Part crevice volume." computation model of effective fracture volume " herein can be the post-fracturing effective fracture body of shale gas well
Long-pending computation model (exploitation of shale gas well is related to gas well fracturing and drives a well to return to be drained through journey), in addition, the row of returning refer to gas well due to
After having carried out hydraulic fracturing construction, need to discharge the big pressure-break in reservoir and the current water in pit shaft before producing gas
Operation.
Specifically, for step 101, the computation model for the effective fracture volume established based on material balance theory is obtained,
The following steps are included:
Step 1011, it is based on material balance theory, establishes the matter balance equation of crevice volume after shale gas well fracturing.
Specifically, using the Fracture System generated after shale gas well fracturing as research object, it is assumed that the stream of the row's of returning initial stage
Frictional resistance is negligible all from the Fracture System, and in crack for body.
Based on material balance theory, in the initial time for the row of returning, Fracture System is by gas and water saturation, the sum of two-phase volume generation
Crevice volume under table original state:
Vfi=GfiBgi+WfiBwi(1)；
In formula (1), VfiIt indicates initial time crevice volume (underground), m3；GfiIndicate gas volume in initial time crack
(ground), m3；BgiIndicate initial time gas volume factor, dimensionless；WfiIndicate water volume (ground) in initial time crack,
m3；BwiIndicate initial time water volume coefficient, dimensionless.
It (is produced in the gas stage in early days) when returning and draining into each moment t, residual gas volume and remaining liq volume in crack
The sum of be each moment t crevice volume:
Vft=(Gfi-Gp)Bg+(Wfi-Wp)Bw(2)；
In formula (2), VftIndicate the crevice volume (underground) of each moment t, m3；GpIndicate that the accumulation of each moment t produces gas
It measures on (ground), m3；BgIndicate the gas volume factor of each moment t, dimensionless；WpIt indicates on cumulative liquid production (ground), m3；BwTable
Show the water volume coefficient of each moment t, dimensionless.
From initial time to each moment t, if crack closure volume is △ Vf, then have:
(GfiBgi+WfiBwi)-[(Gfi-Gp)Bg+(Wfi-Wp)Bw]=Δ Vf(3)；
By the i.e. convertible matter balance equation for obtaining crevice volume after shale gas well fracturing of formula (3) are as follows:
GpBg+WpBw=Gfi(Bg-Bgi)+Wfi(Bw-Bwi)+ΔVf (4)。
Step 1012, according to the matter balance equation of crevice volume after shale gas well fracturing, after obtaining shale gas well fracturing
Effective fracture volume computation model.
Specifically, it may include following steps:
According to crack closure volume delta Vf=VfiCf(pfi-pf) (it is defined), it can be by crack after above-mentioned shale gas well fracturing
The matter balance equation formula (4) of volume makees such as down conversion:
GpBg+WpBw=Gfi(Bg-Bgi)+Wfi(Bw-Bwi)+VfiCf(pfi-pf) (5)；
In formula (5), CfIndicate the crack compressed coefficient, MPa-1；pfiIndicate pressure in initial time crack, MPa；pfIt indicates
Pressure in the crack of each moment t, MPa.
Further according to the water compressed coefficient(it is defined), it is contemplated that the present invention is implemented
Mainly using number of rows is returned according to being calculated in example, time step is smaller (usually hour), the B in each time stepwAnd Pf
Variation is little, so that
Then have
To have
Bw-Bwi≈BwiCw(pfi-pf) (6)；
In formula (6), CwIndicate the water compressed coefficient, MPa-1。
Formula (6) is updated in formula (5), can be obtained:
GpBg+WpBw=Gfi(Bg-Bgi)+WfiBwiCw(pfi-pf)+VfiCf(pfi-pf) (7)；
And due to
In formula (8), SgiIndicate initial time gas phase saturation, decimal.
Formula (8) is updated in formula (7), then the calculating mould of the post-fracturing effective fracture volume of shale gas well can be obtained
Type are as follows:
For step 102, obtain that shale gas well is post-fracturing to return number of rows evidence, comprising the following steps:
Step 1021, the row's of the returning data for obtaining shale gas well.
The row's of returning data of shale gas well is compiled, which includes that the shale gas well of each moment t returns number of rows
According to, return number of rows according to include each moment t (time step) gas production qg, lifting rate qw, surface casing pressure phEtc. data, the row of returning
At the time of initial time can be first time step t.
Step 1022, the row's of returning data according to shale gas well, determine the post-fracturing closing stage of shale gas well.
For step 1022, determine the post-fracturing closing stage of shale gas well the following steps are included:
Choosing surface casing pressure in the row's of returning data of shale gas well to change stable one piece of data data is pre-selection data；
" surface casing pressure changes stable one piece of data data " can be understood as the data in early time data quality high stage
Why data selects the data information in the stage, is yield and pressure data the variation continuous-stable because of the stage, data
Record is accurate, and in gas well early stage production process, produced fluid mostlys come from Fracture System, the fluid base in shale matrix
Originally flowing is had neither part nor lot in, Fracture System is approximately sealed elastic system, can be carried out with the material balance theory of sealed elastic system
Analysis.
According to pre-selection data, bottom pressure p is calculated using Beggs-Brill methodwfAnd gas is inclined under downhole condition
Poor factor Z；Cumulative gas G is calculated using the method fluxionsp；
It is understood that according to the gas production q of moment t each in pre-selection datag, lifting rate qw, surface casing pressure ph, can
Bottom pressure p is calculated using Beggs-Brill methodwfAnd deviation factors Z of the gas under downhole condition.Wherein, Beggs-
Brill method is the common method calculated for horizontal, vertical and any inclination gas-liquid phase pipe.
P is drawn under rectangular coordinate systemwf/ Z and cumulative gas GpRelation curve, if relation curve be straight line, really
Surely the pre-selection data corresponding period is the post-fracturing closing stage of shale gas well.
Due to the various presence that can not resist factor, above-mentioned " if relation curve is straight line " can be understood as the relation curve and connect
Closely in other words work as p for straight linewf/ Z and cumulative gas GpRelation curve when being close to straight line, then can determine pre-selection
The data corresponding period is the post-fracturing closing stage of shale gas well.
Step 1023, according to the row's of returning data of the corresponding shale gas well of closing stage after rock gas well fracturing, obtain shale
Number of rows evidence is returned after gas well fracturing.
Based on the row's of returning data of the corresponding shale gas well of closing stage, the acquired post-fracturing row's of the returning data packet of shale gas well
It includes: the pressure change p in the crack of each moment tfi-pf, the cumulative gas production G of each moment tp, the gas body of each moment t
Product coefficient Bg, the accumulative Liquid output W of each moment tp, the water volume coefficient B of each moment tw(including initial time water volume system
Number Bgi), initial time gas phase saturation Sgi, hydraulic pressure coefficient Cw, crack compressed coefficient Cf。
Wherein, above-mentioned data can be based on the gas production q of each moment tg, lifting rate qw, surface casing pressure phIt calculates, for example,
Above-mentioned data can be based on, the cumulative gas production G of each moment t is calculated using the method fluxionspWith the accumulative Liquid output of each moment t
Wp, the cumulative gas production of each moment tThe accumulative Liquid output of each moment t
Similarly, the pressure change p in the crack of each moment tfi-pf=pwfi-pwf, wherein pwfiFor initial time, that is, t
P when=1wfValue.
The gas volume factor of each moment tT in formulaTemperatureFor reservoir temperature, DEG C；P is pressure,
MPa。PscFor for normal pressure, value is 0.101MPa (specifically referring to " reservoir engineering " teaching material).
The water volume coefficient B of each moment tw≈(1+Cw(pfi-pf))Bwi(can be obtained by above-mentioned formula (6))；
Initial time gas phase saturationIn formula, μgIndicate gas viscosity, mPas；μwIndicate water
Viscosity, mPas.(specifically referring to Ph.D. Dissertation, " gas-liquid two-phase fluid critical seepage mechanism is ground with theory in crack
Study carefully ")
In addition, the compressed coefficient of water is defined as volume change of the water in unit pressure variation；Due to the compression system of water
Number is mainly related with formation temperature and pressure, usually changes less with block same layer position formation temperature and pressure, therefore water
The compressed coefficient can be based on formation temperature and pressure, be determined by empirical value, such as settable hydraulic pressure coefficient CwValue range are as follows:
(3.4-5.0)×10-4MPa-1。
The crack compressed coefficient is defined as volume change of the crack in unit pressure variation, the compressed coefficient value in crack
Method can be with are as follows: for a block, selects 1 mouthful of typical well, establishes evaluation model after fine pressure using Meyer software, obtain
Then effective fracture volume applies Fast Evaluation model of the invention, designs different CfValue carries out tentative calculation, until having for tentative calculation
It imitates crevice volume and the software analogue value is close, then using the trial result and the close value of software analog result as the C of this blockf
It is worth size.Wherein, rule of thumb compressed coefficient C in crack can also be setfValue range can be with are as follows: 0.001-0.01MPa-1。
For step 103, based on the computation model of effective fracture volume, number of rows evidence is returned according to shale gas well is post-fracturing,
The post-fracturing effective fracture volume of shale gas well is calculated, comprising the following steps:
Based on the computation model of effective fracture volume, number of rows evidence is returned according to shale gas well is post-fracturing, calculates y's and x
Value, wherein y GpBg+WpBw, x is
The relation curve of y-x is drawn under plane right-angle coordinate；
By the relation curve of y-x be fitted to one cross origin straight line, using the slope of straight line as shale gas well fracturing after
Effective fracture volume.
It is understood that " relation curve of y-x is fitted to the straight line for crossing origin " is specifically as follows；Be
In excel software, the scatter plot of y-x is drawn, then adds Trendline, setting Trendline type is linear, and intercept is arranged and is
0, show fitting formula and R square value.
Wherein, R indicates the related coefficient of fit correlation formula, R2Indicate coefficient of determination, instead
The fitting degree of regression straight line is reflected, value range is between [0,1], and R2More level off to 1, illustrate regression equation fitting more
It is good；R2It more levels off to 0, illustrates the poorer of regression equation fitting.
For 104, according to the post-fracturing effective fracture volume of shale gas well, the fracturing effect of shale gas well is evaluated, it can be with
Understand, the fracturing effect of the post-fracturing effective fracture volume of shale gas well and shale gas well has a positive correlation, and shale
Test yield, First Year average product and EUR (estimated ultimate can be used in the fracturing effect of gas well
Reserves, the maximum individual well ultimate recoverable reserves of prediction) etc. parameters characterized.
In application, in a shale gas Tanaka, the shale gas well to have put into production for more mouthfuls, calculating separately to obtain it has
Crevice volume is imitated, and establishes linear relationship respectively with its actual test yield, First Year average product and EUR, when needs are sentenced
Break shale gas Tanaka gas field well to be developed fracturing effect when, it is only necessary to the effective fracture of the gas field well to be developed is calculated
Volume, in conjunction with the linear relationship of above-mentioned foundation, can be obtained the test yield of the gas field well to be developed, First Year average product and
The parameters such as EUR, and then can determine whether to obtain the fracturing effect of the gas field well to be developed.
In addition, in the related technology, also pressing crack construction is simulated using various fractured models, to obtain fracture parameters to pressure break
Effect is evaluated, and the method that pressing crack construction acquisition fracture parameters are simulated using fractured model is time-consuming and laborious, and model
Selection is affected to evaluation result.In comparison, using computation model of the invention, row's early stage can be returned in shale gas well
It can quickly determine crevice volume, specify the crack scale formed after gas well fracturing, to evaluate and moving after the fine pressure in later period
State analysis provides reference.
Below technical solution of the present invention will be further described through using Changning shale gas field volume fracturing horizontal well as example
Embodiment and application effect.
2) Beggs-Brill method program calculation bottom pressure p is usedwfAnd deviation factors Z of the gas under downhole condition,
It is shown in Table 1 the 5th~6 column；
3) p is drawn under rectangular coordinate systemwf/ Z (being shown in Table 1 the 7th column) and tired gas production GpThe relationship of (being shown in Table 1 the 11st column)
Curve, the relation curve are approximately straight line (referring to attached drawing 3), it is determined that the conceptual phase is the post-fracturing closing rank of shale gas well
Section.
4) using Fracture System as research object, matter balance equation is established, and derivation transformation is carried out to equation, after obtaining pressure
Effective fracture volume computation model is shown in formula (9)；
5) according to the row's of returning data of the corresponding shale gas well of closing stage after rock gas well fracturing, shale gas well fracturing is calculated
Afterwards return number of rows evidence, including the pressure change p in the crack each moment tfi-pf, gas volume factor Bg, water volume coefficient Bw、
Cumulative gas production Gp, accumulation lifting rate Wp, initial gas saturation S in crackgi, in addition, rule of thumb removing the compressed coefficient of water
CwIt is 0.0004, Fracture System compressed coefficient CfIt is 0.005, is shown in Table 1 the 8th~15 column.
Wherein, CwWith CfTake empirical value, SgiGas is produced by gas-liquid two-phase percolation equationk combination initial time in crack, produces liquid speed
Degree is calculated, GpWith WpBy returning number of rows according to directly calculating, BgWith BwRespectively by pwf/ Z and CwIt is calculated, pfi-pfBy counting
The each moment calculation of pressure calculated obtains；
6) value of calculating parameter y and x is shown in Table 1 the 16th~17 column；
7) using y as ordinate, x is abscissa, draws y and x relationship curve, under rectangular coordinate system with straight line fitting curve
The relational expression of y and x are obtained, wherein straight slope is the effective volume in initial time crack, obtains effective fracture after H1 well pressure
Volume is 19260m3(referring to attached drawing 4).
(2) application effect
With with identical method in (1) to Changning shale gas field shale gas volume fracturing horizontal well H2, H3, H4, H5, H6
Well is analyzed, and F and the E relation curve and fit correlation formula of each well is obtained, referring to attached drawing 5-9.
Count effective fracture volume, fracturing fluid injected slurry volume, the test yield, First Year of H1, H2, H3, H4, H5, H6 well
The parameters such as average daily production, EUR, wherein fracturing fluid injected slurry volume, test yield, the first average annual daily volume, EUR can be by realities
Border creation data obtains, and is shown in Table 2.
2 fracturing fluid injected slurry volume of table, effective fracture volume and test output statistics
Currently, the live fracturing effect for mostly using fracturing fluid injected slurry volume to carry out preliminary analysis shale gas well, it is considered that note
The fracturing fluid volume entered is bigger, also higher to the transformation degree of reservoir, so that gas well yield also can be higher.In fact, shale
The correctional effect of gas well is influenced by many factors, and fracturing fluid injected slurry volume evaluation fracturing effect is applied alone to there is very big be not allowed
True property.Attached drawing 10 is the test yield and fracturing fluid injected slurry volume relationship of 6 mouthfuls of wells of analysis, it can be seen that the two is in spite of certain
Positive correlation, but correlation is not high.
On the other hand, according to the effect of the method evaluation gas well in the present invention, it can directly obtain and post-fracturing effectively split
Stitch volume, and effective fracture volume is a very important parameter in effect assessment after pressure.It tests and produces from attached drawing 10- attached drawing 11
Measure can be seen that test yield and effectively splits with the comparison of fracturing fluid injected slurry volume, test yield and effective fracture volume relationship
The correlation for stitching volume is more preferable, and thus also explanation uses effect ratio after effective fracture volume assessment pressure to use fracturing fluid injected slurry volume
More rationally.
In addition, the relationship from 13 effective fracture volume of attached drawing 12- attached drawing and the first average annual daily volume of gas well, EUR can be with
Find out, thus the development behavior evaluation index positive correlation with higher of effective fracture volume and gas well also further illustrates
It is appropriate using effect after effective fracture volume assessment pressure.
In turn, the similar shale gas well of geological conditions other for local area, effect obtains after evaluating pressure break with the present invention
To after effective fracture volume, can according to test yield, the relational expression of the first average annual daily volume and EUR and effective fracture volume,
Test yield, the first average annual daily volume and the EUR size of the new fracturing production well of approximate estimation, quickly do one to gas well deliverability
A preliminary assessment.
On the other hand, the embodiment of the invention also provides a kind of evaluating apparatus of shale gas well fracturing effect, such as Fig. 2 institute
Show, which includes:
First obtains module 201, for obtaining the computation model for the effective fracture volume established based on material balance theory；
Second obtains module 202, and for obtaining, shale gas well is post-fracturing to return number of rows evidence；
Computing module 203 returns number of rows according to shale gas well is post-fracturing for the computation model based on effective fracture volume
According to the post-fracturing effective fracture volume of shale gas well is calculated；
Evaluation module 204, for evaluating the pressure break effect of shale gas well according to the post-fracturing effective fracture volume of shale gas well
Fruit.
Optionally, the first acquisition module 201, comprising:
Unit is established, for being based on the material balance theory, establishes the material balance of crevice volume after shale gas well fracturing
Equation；
First determination unit obtains shale for the matter balance equation according to crevice volume after the shale gas well fracturing
The computation model of the effective fracture volume after gas well fracturing.
Optionally, after the shale gas well fracturing crevice volume matter balance equation are as follows:
GpBg+WpBw=Gfi(Bg-Bgi)+Wfi(Bw-Bwi)+ΔVf；
Wherein, GpIndicate the cumulative gas production of each moment t；BgIndicate the gas volume factor of each moment t； WpIt indicates
Cumulative liquid production；BwIndicate the water volume coefficient of each moment t；GfiIndicate gas volume in initial time crack；BgiIt indicates just
Begin moment gas volume factor；WfiIndicate water volume in initial time crack；BwiIndicate initial time water volume coefficient；△VfFor
Crack closure volume of the initial time to each moment t.
Optionally, the computation model of the effective fracture volume are as follows:
Wherein, CwIndicate the water compressed coefficient；CfIndicate the crack compressed coefficient；pfiIndicate pressure in initial time crack；pfTable
Show pressure in the crack of each moment t；SgiIndicate initial time gas phase saturation；VfiIndicate initial time crevice volume.
Optionally, hydraulic pressure coefficient CwValue range are as follows: (3.4-5.0) × 10-4MPa-1。
Optionally, crack compressed coefficient CfValue range are as follows: 0.001-0.01MPa-1。
Optionally, the second acquisition module 202, comprising:
First acquisition unit, for obtaining the row's of returning data of shale gas well；
Second determination unit determines the post-fracturing closing rank of shale gas well for the row's of returning data according to the shale gas well
Section；
Second acquisition unit, for being provided according to the row of returning of the corresponding shale gas well of closing stage after the rock gas well fracturing
Material, obtains that the shale gas well is post-fracturing to return number of rows evidence.
Optionally, it is flat to be also used to choose surface casing pressure variation in the row's of returning data of the shale gas well for second determination unit
The data information of a steady period is pre-selection data；According to the pre-selection data, per a period of time is calculated using Beggs-Brill device
Carve the bottom pressure p of twfAnd deviation factors Z of the gas under downhole condition；Cumulative gas G is calculated using the method fluxionsp；?
P is drawn under rectangular coordinate systemwf/ Z and cumulative gas GpRelation curve, if the relation curve be straight line, it is determined that the pre-selection
The data corresponding period is the post-fracturing closing stage of shale gas well.
Optionally, the computing module 203, comprising:
Computing unit, for the computation model based on the effective fracture volume, according to the post-fracturing row of returning of shale gas well
Data calculate the value of y and x, wherein the y is GpBg+WpBw, which is
Drawing unit, for drawing the relation curve of y-x under plane right-angle coordinate；
Third determination unit, for the relation curve of the y-x to be fitted to the straight line for crossing origin, by the oblique of the straight line
Rate is as the post-fracturing effective fracture volume of the shale gas well.
The evaluating apparatus provided in the embodiment of the present invention obtains the effective fracture body established based on material balance theory first
Then the post-fracturing number of rows of returning of shale gas well is obtained shale gas well pressure according to being updated in the computation model by long-pending computation model
Effective fracture volume after splitting, since post-fracturing number of rows of returning is according to being the firsthand information that can be obtained after gas well fracturing, gas well
Number of rows is returned according to the indirect reflection for being characterized in fracturing transformation effect, thus obtained effective fracture volume can more accurately evaluate page
The fracturing effect of rock gas well.
It should be understood that the evaluating apparatus of shale gas well fracturing effect provided by the above embodiment is in evaluation fracturing effect
When, only the example of the division of the above functional modules, in practical application, it can according to need and divide above-mentioned function
With being completed by different functional modules, i.e., the internal structure of device is divided into different functional modules, to complete above description
All or part of function.In addition, the evaluating apparatus of shale gas well fracturing effect provided by the above embodiment and shale gas well
The evaluation method embodiment of fracturing effect belongs to same design, and specific implementation process is detailed in embodiment of the method, no longer superfluous here
It states.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The above is merely for convenience of it will be understood by those skilled in the art that technical solution of the present invention, not to limit
The present invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (10)
1. a kind of evaluation method of shale gas well fracturing effect, which comprises the following steps:
Obtain the computation model for the effective fracture volume established based on material balance theory；
Obtain that shale gas well is post-fracturing returns number of rows evidence；
Based on the computation model of the effective fracture volume, number of rows evidence is returned according to the shale gas well is post-fracturing, is calculated
The post-fracturing effective fracture volume of shale gas well；
According to the post-fracturing effective fracture volume of the shale gas well, the fracturing effect of shale gas well is evaluated.
2. evaluation method according to claim 1, which is characterized in that the acquisition is had based on what material balance theory was established
Imitate the computation model of crevice volume, comprising:
Based on the material balance theory, the matter balance equation of crevice volume after shale gas well fracturing is established；
According to the matter balance equation of crevice volume after the shale gas well fracturing, it is post-fracturing described effective to obtain shale gas well
The computation model of crevice volume.
3. evaluation method according to claim 2, which is characterized in that the substance of crevice volume after the shale gas well fracturing
Equilibrium equation are as follows:
GpBg+WpBw=Gfi(Bg-Bgi)+Wfi(Bw-Bwi)+ΔVf；
Wherein, GpIndicate the cumulative gas production of each moment t；BgIndicate the gas volume factor of each moment t；WpIndicate accumulation
Liquid output；BwIndicate the water volume coefficient of each moment t；GfiIndicate gas volume in initial time crack；BgiWhen indicating initial
Carve gas volume factor；WfiIndicate water volume in initial time crack；BwiIndicate initial time water volume coefficient；△VfIt is initial
Crack closure volume of the moment to each moment t.
4. evaluation method according to claim 3, which is characterized in that the computation model of the effective fracture volume are as follows:
Wherein, CwIndicate the water compressed coefficient；CfIndicate the crack compressed coefficient；pfiIndicate pressure in initial time crack；pfIndicate every
Pressure in the crack of one moment t；SgiIndicate initial time gas phase saturation；VfiIndicate initial time crevice volume.
5. evaluation method according to claim 4, which is characterized in that the hydraulic pressure coefficient CwValue range are as follows: (3.4-
5.0)×10-4MPa-1。
6. evaluation method according to claim 4, which is characterized in that the crack compressed coefficient CfValue range are as follows:
0.001-0.01MPa-1。
7. evaluation method according to claim 1, which is characterized in that the acquisition shale gas well is post-fracturing to return number of rows
According to, comprising:
Obtain the row's of returning data of shale gas well；
According to the row's of returning data of the shale gas well, the post-fracturing closing stage of shale gas well is determined；
According to the row's of returning data of the corresponding shale gas well of the closing stage after the rock gas well fracturing, the shale gas is obtained
Well is post-fracturing to return number of rows evidence.
8. evaluation method according to claim 7, which is characterized in that the row's of returning data according to the shale gas well,
Determine the post-fracturing closing stage of shale gas well, comprising:
It chooses surface casing pressure in the row's of returning data of the shale gas well and changes the data information of a stable period as pre-selection money
Material；
According to the pre-selection data, the bottom pressure p of each moment t is calculated using Beggs-Brill methodwfAnd gas is in shaft bottom
Under the conditions of deviation factors Z；Cumulative gas G is calculated using the method fluxionsp；
P is drawn under rectangular coordinate systemwf/ Z and cumulative gas GpRelation curve, if the relation curve be straight line, really
Determining the pre-selection data corresponding period is the post-fracturing closing stage of shale gas well.
9. evaluation method according to claim 4, which is characterized in that the calculating mould based on the effective fracture volume
Type returns number of rows evidence according to the shale gas well is post-fracturing, and the post-fracturing effective fracture volume of shale gas well is calculated, packet
It includes:
Based on the computation model of the effective fracture volume, number of rows evidence is returned according to the shale gas well is post-fracturing, calculates y and x
Value, wherein the y be GpBg+WpBw, the x is
The relation curve of y-x is drawn under plane right-angle coordinate；
The relation curve of the y-x is fitted to the straight line for crossing origin, using the slope of the straight line as the shale gas
The post-fracturing effective fracture volume of well.
10. a kind of evaluating apparatus of shale gas well fracturing effect, which is characterized in that described device includes:
First obtains module, for obtaining the computation model for the effective fracture volume established based on material balance theory；
Second obtains module, and for obtaining, shale gas well is post-fracturing to return number of rows evidence；
Computing module, for the computation model based on the effective fracture volume, according to the post-fracturing row of returning of shale gas well
The post-fracturing effective fracture volume of shale gas well is calculated in data；
Evaluation module, for evaluating the fracturing effect of shale gas well according to the post-fracturing effective fracture volume of the shale gas well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225668.4A CN108959679A (en) | 2018-03-19 | 2018-03-19 | Evaluation method and evaluation device for fracturing effect of shale gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225668.4A CN108959679A (en) | 2018-03-19 | 2018-03-19 | Evaluation method and evaluation device for fracturing effect of shale gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108959679A true CN108959679A (en) | 2018-12-07 |
Family
ID=64495217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810225668.4A Pending CN108959679A (en) | 2018-03-19 | 2018-03-19 | Evaluation method and evaluation device for fracturing effect of shale gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108959679A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049625A (en) * | 2020-08-26 | 2020-12-08 | 中国石油天然气股份有限公司 | Gas production coefficient determination method, device, equipment and medium for shale gas horizontal well |
| CN112115573A (en) * | 2019-06-21 | 2020-12-22 | 中国石油天然气股份有限公司 | Method and equipment for evaluating blockage degree of shaft |
| CN113266328A (en) * | 2020-02-17 | 2021-08-17 | 中国石油天然气股份有限公司 | Method and device for evaluating fracturing effect of shale reservoir |
| CN113486538A (en) * | 2021-08-06 | 2021-10-08 | 江苏达坦智慧能源有限公司 | Unconventional oil and gas well yield prediction and fracturing effect evaluation method |
| CN113550744A (en) * | 2020-04-26 | 2021-10-26 | 中国石油天然气股份有限公司 | Shale gas drainage and gas recovery effect evaluation method |
| CN113833446A (en) * | 2020-06-23 | 2021-12-24 | 中国石油天然气股份有限公司 | Fracturing effect evaluation method and device |
| CN114021466A (en) * | 2021-11-10 | 2022-02-08 | 西南石油大学 | Shale gas effective gap net volume prediction method based on flowback data and machine learning |
| CN114048695A (en) * | 2021-11-10 | 2022-02-15 | 西南石油大学 | Effective shale gas seam net volume inversion method based on flowback data |
| CN115045644A (en) * | 2022-06-19 | 2022-09-13 | 西南石油大学 | Method for rapidly predicting shale gas well fracturing fluid return displacement based on production data |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306660A (en) * | 2012-03-13 | 2013-09-18 | 中国石油化工股份有限公司 | Shale gas reservoir hydraulic fracturing production increasing method |
| CN105134158A (en) * | 2015-08-26 | 2015-12-09 | 中国石油天然气股份有限公司 | Fracturing method for supplementing stratum energy of compact oil reservoir |
| US20160272511A1 (en) * | 2015-03-18 | 2016-09-22 | Lehigh University | Self-Regenerating Anion Exchange Process for Treating Shale Gas Flowback Waste Water |
| CN107679338A (en) * | 2017-10-20 | 2018-02-09 | 合肥工业大学 | Based on the reservoir fracturing effect evaluation method and evaluation system for returning row evidence |
-
2018
- 2018-03-19 CN CN201810225668.4A patent/CN108959679A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306660A (en) * | 2012-03-13 | 2013-09-18 | 中国石油化工股份有限公司 | Shale gas reservoir hydraulic fracturing production increasing method |
| US20160272511A1 (en) * | 2015-03-18 | 2016-09-22 | Lehigh University | Self-Regenerating Anion Exchange Process for Treating Shale Gas Flowback Waste Water |
| CN105134158A (en) * | 2015-08-26 | 2015-12-09 | 中国石油天然气股份有限公司 | Fracturing method for supplementing stratum energy of compact oil reservoir |
| CN107679338A (en) * | 2017-10-20 | 2018-02-09 | 合肥工业大学 | Based on the reservoir fracturing effect evaluation method and evaluation system for returning row evidence |
Non-Patent Citations (1)
| Title |
|---|
| 吴天鹏: "基于返排数据的页岩气井压后裂缝体积评价", 《2016年全国天然气学术年会论文集》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112115573B (en) * | 2019-06-21 | 2022-11-04 | 中国石油天然气股份有限公司 | Method and equipment for evaluating blockage degree of shaft |
| CN112115573A (en) * | 2019-06-21 | 2020-12-22 | 中国石油天然气股份有限公司 | Method and equipment for evaluating blockage degree of shaft |
| CN113266328A (en) * | 2020-02-17 | 2021-08-17 | 中国石油天然气股份有限公司 | Method and device for evaluating fracturing effect of shale reservoir |
| CN113550744B (en) * | 2020-04-26 | 2023-08-22 | 中国石油天然气股份有限公司 | Shale gas drainage gas production effect evaluation method |
| CN113550744A (en) * | 2020-04-26 | 2021-10-26 | 中国石油天然气股份有限公司 | Shale gas drainage and gas recovery effect evaluation method |
| CN113833446B (en) * | 2020-06-23 | 2023-08-22 | 中国石油天然气股份有限公司 | Fracturing effect evaluation method and device |
| CN113833446A (en) * | 2020-06-23 | 2021-12-24 | 中国石油天然气股份有限公司 | Fracturing effect evaluation method and device |
| CN112049625A (en) * | 2020-08-26 | 2020-12-08 | 中国石油天然气股份有限公司 | Gas production coefficient determination method, device, equipment and medium for shale gas horizontal well |
| CN112049625B (en) * | 2020-08-26 | 2023-10-27 | 中国石油天然气股份有限公司 | Shale gas horizontal well gas production coefficient determination method, device, equipment and medium |
| CN113486538A (en) * | 2021-08-06 | 2021-10-08 | 江苏达坦智慧能源有限公司 | Unconventional oil and gas well yield prediction and fracturing effect evaluation method |
| CN113486538B (en) * | 2021-08-06 | 2024-03-05 | 江苏达坦智慧能源有限公司 | Unconventional oil and gas well yield prediction and fracturing effect evaluation method |
| CN114021466A (en) * | 2021-11-10 | 2022-02-08 | 西南石油大学 | Shale gas effective gap net volume prediction method based on flowback data and machine learning |
| CN114048695A (en) * | 2021-11-10 | 2022-02-15 | 西南石油大学 | Effective shale gas seam net volume inversion method based on flowback data |
| CN114048695B (en) * | 2021-11-10 | 2022-09-09 | 西南石油大学 | Effective shale gas seam net volume inversion method based on flowback data |
| CN115045644A (en) * | 2022-06-19 | 2022-09-13 | 西南石油大学 | Method for rapidly predicting shale gas well fracturing fluid return displacement based on production data |
| CN115045644B (en) * | 2022-06-19 | 2023-05-26 | 西南石油大学 | Method for rapidly predicting shale gas well fracturing fluid return displacement based on production data |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108959679A (en) | Evaluation method and evaluation device for fracturing effect of shale gas well | |
| Wang et al. | A review of stimulated reservoir volume characterization for multiple fractured horizontal well in unconventional reservoirs | |
| CN109002574A (en) | A kind of stratified reservoir pulse period waterflooding extraction index prediction technique | |
| Zhao et al. | A simulation method for modified isochronal well testing to determine shale gas well productivity | |
| CN107301306A (en) | Dynamic open-flow capacity Forecasting Methodology for DAMAGE OF TIGHT SAND GAS RESERVOIRS pressure break horizontal well | |
| CN207453949U (en) | Device for simulating proppant migration and distribution rules in fracturing, flowback and gas production processes | |
| CN105116467B (en) | Analyze of Nearshore Subaqueous Fans glutenite sedimentation unit body division methods | |
| CN112016212B (en) | Reservoir longitudinal heterogeneity evaluation method based on seepage control equation | |
| Okere et al. | Experimental, algorithmic, and theoretical analyses for selecting an optimal laboratory method to evaluate working fluid damage in coal bed methane reservoirs | |
| Friedrich et al. | Determining the contributing reservoir volume from hydraulically fractured horizontal wells in the Wolfcamp formation in the Midland Basin | |
| CN105467463B (en) | Analyze of Nearshore Subaqueous Fans fluvial deposition cell cube maximum extended distance Quantitative prediction methods | |
| CN105740563A (en) | Preferential channel identification technology for secondary development of mature oil field | |
| CN107907180A (en) | Closed coal mine underground reservoir analog simulation experimental rig and method | |
| CN110984973A (en) | Determination method for single-well controlled reserve of fracture-cave carbonate gas reservoir | |
| CN108460203A (en) | Shale oil reservoir gas recycling oil well output analysis method and its application | |
| Wang et al. | Quantitative characterisation of gas loss and numerical simulations of underground gas storage based on gas displacement experiments performed with systems of small-core devices connected in series | |
| CN109543206A (en) | The economic calorific requirement optimization method of heavy crude heat extraction horizontal well reservoir | |
| CN106640021A (en) | Calculation method and device of post-pressure blowout parameters | |
| CN102373918B (en) | Oil well batch production simulation experimental facility for low-permeability reservoir | |
| CN109577945A (en) | A kind of experimental provision and method of hypotonic-Oil in Super-low Permeability oil reservoir fluid-channeling channel differentiation | |
| CN102243672A (en) | Gushing operation condition soft sensing modeling method based on hybrid multiple models in shield tunneling process | |
| CN107725042A (en) | A kind of large-scale fracture and vug carbonate reservoir physical simulation experiment device of HTHP and method | |
| Todd et al. | An Evaluation of EOR Potential in the Elm Coulee Bakken Formation, Richland County, Montana | |
| CN109441415A (en) | The Well Test Data Analysis Method of Polymer Flooding Reservoirs testing well based on disturbance from offset wells | |
| Peng et al. | Fractional model for simulating long-term fracture conductivity decay of shale gas and its influences on the well production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
|
| RJ01 | Rejection of invention patent application after publication |