CN109184660A - A kind of shale gas evaluating production capacity method based on Production log data - Google Patents
A kind of shale gas evaluating production capacity method based on Production log data Download PDFInfo
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Abstract
The shale gas evaluating production capacity method based on Production log data that the invention discloses a kind of, its step are as follows: a, in conjunction with sound state geologic information and staged fracturing engineering parameter, the major control factors of comprehensive analysis shale gas well deliverability；B, the segmentation of each pressure break of the brought in well measured using production logging, each perforation cluster capacity data, the production capacity relativeness between the different small layer units of statistical analysis；C, production capacity corresponding relationship under single factor analysis difference development degree of micro cracks in oil, under different pressure break scales and under the conditions of different fracturing technologies；D, the relationship between productivity of the unit length using different small layer units under different geology, engineering specifications, the yield and actual production for calculating First Year return, according to modified result and adjustment relationship between productivity, determine final capability forecasting equation, this method is accurately reasonable in shale gas well deliverability prediction result, the difficulty for avoiding the selection of shale gas reservoir parameter simultaneously, can quickly and effectively predict the average product of gas well First Year.
Description
Technical field
The present invention relates to petroleum natural gas exploration fields, specifically relate to a kind of page based on Production log data
Rock gas evaluating production capacity method.
Background technique
Normal gas pools generally seek open-flow capacity by deliverability testing to evaluate gas well capacity, specifically there is back pressure test
Method, isochronal well testing method, modified isochronal method and " one point method " well testing etc., it is big for shale gas well initial stage fracturing fluid recovery,
Wellbore pressure fluctuation is big and is not easy to obtain, and the fast feature of production decline, many scholars have carried out many on the basis of such method
It explores and improves, the mainly deformation to the amendment of empirical coefficient or binomial equation, but still be difficult to accurately estimate shale gas
Well capacity.The characteristics of for the transformation of shale gas staged fracturing and shale gas seepage flow mechanism, numerical simulation evaluating production capacity and analytic method
Evaluating production capacity is increasingly becoming the hot spot of shale gas evaluating production capacity research, however the Seepage mode and artificial fracture of shale gas complexity
The simulation of complicated form becomes its main problem faced, restricts the application of such method and popularizes.
Summary of the invention
The present invention is directed to provide a kind of based on Production log data for defect and deficiency present in the above-mentioned prior art
Shale gas evaluating production capacity method, this method is accurately reasonable in shale gas well deliverability prediction result, at the same avoid shale gas storage
The difficulty that layer parameter is chosen, can quickly and effectively predict the average product of gas well First Year, provide and more may be used for the rational proration of gas well
The guarantee leaned on.
The present invention is realized by using following technical proposals:
A kind of shale gas evaluating production capacity method based on Production log data, it is characterised in that steps are as follows:
A, in conjunction with sound state geologic information and staged fracturing engineering parameter, the main control of comprehensive analysis shale gas well deliverability because
Element；
B, the segmentation of each pressure break of the brought in well measured using production logging, each perforation cluster capacity data, statistical analysis is different small
Production capacity relativeness between layer unit；
C, production capacity pair under single factor analysis difference development degree of micro cracks in oil, under different pressure break scales and under the conditions of different fracturing technologies
It should be related to；
D, the relationship between productivity of the unit length using different small layer units under different geology, engineering specifications, calculates First Year
Yield and actual production return, and according to modified result and adjustment relationship between productivity, determine final capability forecasting equation (formula 1):
(formula 1)
P be the first annual output of individual well, 104m3；For every section of pressure break segment length, m；For under fracturing section different situations (small layer unit,
Fracture development condition, pressure break scale etc.) unit length production capacity, 104m3/m；
E, productivity analysis and evaluation are carried out according to prediction result.
In the step a, on the basis of shale gas reservoir geologic feature comprehensive study, incorporation engineering parameter and creation data
Determine the principal element for influencing gas well deliverability；The principal element includes geologic(al) factor and engineering factor.
It such as in the geologic(al) factor of Weiyuan regional influence shale gas gas well deliverability is mainly that optimal small layer unit bores
Encountering rate and microcrack development degree, the engineering factor are mainly the pressure break scale and fracturing technology for influencing pressure break validity.
In the step b, the capacity data of each pressure break segmentation of brought in well, each perforation cluster that are measured according to production logging,
Statistically analyze the daily output range of different substratum unit of cells length.
In the step c, the yield in step b is classified according to its microcrack development degree, pressing crack construction validity, is led to
Cross single factor analysis, the different small layer units of acquisition corresponding production capacity under different microcrack development degrees and under different pressure break scales
Match table.
In the step d, the production allocation table obtained in step c is represented under the conditions of different geological conditions, fracturing engineering
Relative productivity obtains practical production allocation for predicting the first annual output by returning with the actual production of gas well First Year.
In the step e, the production allocation of individual well reflects the weight of each factors on productivity, different wellblocks in plane
Production capacity characteristic distributions examine fracturing transformation effect convenient for disclosing the geology dessert distribution of shale gas；Wellblock of not going into operation passes through
Accurate capability forecasting carries out rational proration, formulates effective development plan.
Compared with prior art, the beneficial effects obtained by the present invention are as follows it is as follows:
One, the present invention is from shale gas reservoir geologic feature and production law, and Geological Engineering combines, geology of having given prominence to the key points sweet tea
The key element of the two influence shale gas gas well deliverabilities of point and fracturing reform validity, prediction theory basis is reliable, embodies
The characteristics of shale gas is developed.
Two, the present invention is more suitable for China's shale gas well using the yield of First Year as the index of evaluation shale gas production capacity
The production method of " limited production pressure control ", the yield for the First Year equally predicted also have more directive significance for proration of single well.
Three, the present invention is based on the data of the first-hand reflection production capacity of production logging data passes through in conjunction with sound state geologic feature
Different pressure breaks can be made the well of effect by reasonable production allocation (different small layer units, geological conditions and pressing crack construction condition)
(including casing deformation well, multistage combined pressure well) predicts production capacity, and compared with the method for simple geologic feature prediction production capacity, application range is more
It is extensive.
Four, the present invention is based on Geological Engineerings to combine, and the thinking of the production allocation under different condition is produced to shale gas well
Energy prediction technique new exploration and trial, the condition in conjunction with different shale gas block datas can be simplified or be expanded, be answered
With having a extensive future.
Detailed description of the invention
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, in which:
Attached drawing 1 is the present invention in regional certain block LMX group shale gas evaluating production capacity achievement chart in Weiyuan.
Specific embodiment
Embodiment 1
As a better embodiment of the invention, it discloses a kind of shale gas evaluating production capacity side based on Production log data
Method, its step are as follows:
A, in conjunction with sound state geologic information and staged fracturing engineering parameter, the main control of comprehensive analysis shale gas well deliverability because
Element；
B, the segmentation of each pressure break of the brought in well measured using production logging, each perforation cluster capacity data, statistical analysis is different small
Production capacity relativeness between layer unit；
C, production capacity pair under single factor analysis difference development degree of micro cracks in oil, under different pressure break scales and under the conditions of different fracturing technologies
It should be related to；
D, the relationship between productivity of the unit length using different small layer units under different geology, engineering specifications, calculates First Year
Yield and actual production return, and according to modified result and adjustment relationship between productivity, determine final capability forecasting equation (formula 1):
(formula 1)
P be the first annual output of individual well, 104m3；For every section of pressure break segment length, m；For (substratum list under fracturing section different situations
Member, fracture development condition, pressure break scale etc.) unit length production capacity, 104m3/m；
E, productivity analysis and evaluation are carried out according to prediction result.
Embodiment 2
As preferred forms of the invention, it discloses a kind of shale gas evaluating production capacity side based on Production log data
Method includes the following steps:
A, research area is provided by shale gas reservoir reservoir, construction and fracture geometric signature analysis in conjunction with the dynamic such as well logging, creation data
Material has determined that influencing the geologic(al) factor of shale gas gas well deliverability is mainly optimal small layer unit Drilling ratio, microcrack development degree,
Engineering factor is mainly the pressure break scale and fracturing technology for influencing pressure break validity.
B, more than the 200 perforation cluster production logging of 6 mouthfuls of collection research area shale gas horizontal well obtain yield data, exclude crack because
Element has determined the relationship between productivity under the conditions of the identical fracturing technology of each small layer unit.
C, on the basis of step b, by single factor analysis, different small layer units are obtained in different microcrack development degrees
Under, corresponding production allocation table under different pressure break scale.
D, shale gas 31 mouthfuls of first annual outputs of operation horizontal well in research on utilization area return, and it is (attached to obtain practical production allocation table
Table 1), individual well First Year gas yield can be calculated using formula 1.
1 Weiyuan of subordinate list area certain block LMX group shale gas production allocation table (unit: 104m3/m)
E, prediction result and actual production degree of agreement are higher, reflect that equivalent production capacity value is reasonable, embody current fracturing reform
1 substratum and microcrack development section are current exploitations geology dessert (attached drawing 1) under technical conditions.
The present invention is based on pilot production data, production logging data and horizontal well fracturing parameters, with analysing in depth gas reservoir
On the basis of matter feature and gas well deliverability influence factor, the method for a set of prediction shale gas gas well deliverability is provided.The set method
In conjunction with Weiyuan area shale gas well development feature, the initial production data obtained using each fracturing section production logging of horizontal well is bases
Plinth matches different substratum (the exploitation stratum bored and met according to the parameters such as development degree of micro cracks in oil, pressure break scale, fracturing technology adaptability
Unit) unit length production capacity, determine gas well deliverability predictive equation by returning with the actual production of gas well First Year, not only body
Show the integrated thinking of geology-engineering in shale gas reservoir research, also reflects the master of Weiyuan regional influence shale gas well deliverability
Factor is wanted, each substratum is rationally effective with producing.The present invention is accurately reasonable in Weiyuan area shale gas well deliverability prediction result, keeps away simultaneously
The difficulty for having exempted from the selection of shale gas reservoir parameter, can quickly and effectively predict the average product of gas well First Year, be the reasonable of gas well
More reliable guarantee is provided with producing.
Claims (7)
1. a kind of shale gas evaluating production capacity method based on Production log data, it is characterised in that steps are as follows:
A, in conjunction with sound state geologic information and staged fracturing engineering parameter, the main control of comprehensive analysis shale gas well deliverability because
Element；
B, the segmentation of each pressure break of the brought in well measured using production logging, each perforation cluster capacity data, statistical analysis is different small
Production capacity relativeness between layer unit；
C, production capacity pair under single factor analysis difference development degree of micro cracks in oil, under different pressure break scales and under the conditions of different fracturing technologies
It should be related to；
D, the relationship between productivity of the unit length using different small layer units under different geology, engineering specifications, calculates First Year
Yield and actual production return, and according to modified result and adjustment relationship between productivity, determine final capability forecasting equation (formula 1):
(formula 1)
P be the first annual output of individual well, 104m3；For every section of pressure break segment length, m；For the unit length under fracturing section different situations
Production capacity, 104m3/m；
E, productivity analysis and evaluation are carried out according to prediction result.
2. a kind of shale gas evaluating production capacity method based on Production log data according to claim 1, it is characterised in that:
In the step a, on the basis of shale gas reservoir geologic feature comprehensive study, incorporation engineering parameter and creation data determine influence
The principal element of gas well deliverability；The principal element includes geologic(al) factor and engineering factor.
3. a kind of shale gas evaluating production capacity method based on Production log data according to claim 2, it is characterised in that:
The geologic(al) factor is mainly optimal small layer unit Drilling ratio and microcrack development degree, the engineering factor are mainly shadow
Ring the pressure break scale and fracturing technology of pressure break validity.
4. a kind of shale gas evaluating production capacity method based on Production log data according to claim 1, it is characterised in that:
In the step b, the capacity data of each pressure break segmentation of brought in well, each perforation cluster that are measured according to production logging, statistical analysis
The daily output range of different substratum unit of cells length.
5. a kind of shale gas evaluating production capacity method based on Production log data according to claim 1, it is characterised in that:
In the step c, the yield in step b is classified according to its microcrack development degree, pressing crack construction validity, passes through single factor test
Analysis, the different small layer units of acquisition corresponding production allocation table under different microcrack development degrees and under different pressure break scales.
6. a kind of shale gas evaluating production capacity method based on Production log data according to claim 1, it is characterised in that:
In the step d, the production allocation table obtained in step c represents the relative productivity under the conditions of different geological conditions, fracturing engineering,
By returning with the actual production of gas well First Year, practical production allocation is obtained for predicting the first annual output.
7. a kind of shale gas evaluating production capacity method based on Production log data according to claim 1, it is characterised in that:
In the step e, the production allocation of individual well reflects the weight of each factors on productivity, the production capacity distribution of different wellblocks in plane
Feature examines fracturing transformation effect convenient for disclosing the geology dessert distribution of shale gas；Wellblock is not gone into operation by accurately producing
It can predict to carry out rational proration, formulate development plan.
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Cited By (12)
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| CN111396038A (en) * | 2020-04-22 | 2020-07-10 | 中国石油天然气集团有限公司 | Horizontal single well yield prediction method |
| WO2020192675A1 (en) * | 2019-03-27 | 2020-10-01 | 中国石油大学(华东) | Productivity prediction method for fractured horizontal well in tight oil reservoir |
| CN111852466A (en) * | 2020-08-28 | 2020-10-30 | 四川长宁天然气开发有限责任公司 | Method for shale gas well scale production allocation and pipe network operation optimization |
| CN111927417A (en) * | 2019-04-28 | 2020-11-13 | 中国石油化工股份有限公司 | Shale gas staged fracturing horizontal well group reserve utilization condition evaluation method |
| CN111985833A (en) * | 2020-08-28 | 2020-11-24 | 四川长宁天然气开发有限责任公司 | Shale gas fracturing project intelligent scheduling method and system |
| CN112001089A (en) * | 2020-08-28 | 2020-11-27 | 四川长宁天然气开发有限责任公司 | Shale gas fracturing engineering tracking deduction method |
| CN112031740A (en) * | 2019-05-15 | 2020-12-04 | 中国石油化工股份有限公司 | Shale gas geological dessert evaluation method and device based on stratum elements |
| CN112214886A (en) * | 2020-09-28 | 2021-01-12 | 中国石油天然气集团有限公司 | Evaluation method for capacity contribution rate based on carbon isotope analysis of natural gas |
| CN112211626A (en) * | 2020-10-30 | 2021-01-12 | 西南石油大学 | Optimization method for productivity well testing test type of heterogeneous gas reservoir gas well |
| CN112561356A (en) * | 2020-12-21 | 2021-03-26 | 西安石油大学 | Comprehensive evaluation method for production dynamic mode and productivity of shale oil fracturing horizontal well |
| 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 |
| CN114198088A (en) * | 2021-12-16 | 2022-03-18 | 中国石油天然气股份有限公司 | Optimization method of decreasing method for predicting flowback volume of fracturing fluid after shale gas well pressure |
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| WO2020192675A1 (en) * | 2019-03-27 | 2020-10-01 | 中国石油大学(华东) | Productivity prediction method for fractured horizontal well in tight oil reservoir |
| CN111927417A (en) * | 2019-04-28 | 2020-11-13 | 中国石油化工股份有限公司 | Shale gas staged fracturing horizontal well group reserve utilization condition evaluation method |
| CN112031740A (en) * | 2019-05-15 | 2020-12-04 | 中国石油化工股份有限公司 | Shale gas geological dessert evaluation method and device based on stratum elements |
| CN112031740B (en) * | 2019-05-15 | 2024-02-02 | 中国石油化工股份有限公司 | Shale gas geological dessert evaluation method and device based on stratum elements |
| CN111396038B (en) * | 2020-04-22 | 2023-10-03 | 中国石油天然气集团有限公司 | Prediction method for horizontal single well yield |
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| CN112001089B (en) * | 2020-08-28 | 2023-08-15 | 四川长宁天然气开发有限责任公司 | Shale gas fracturing engineering tracking deduction method |
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| CN111985833B (en) * | 2020-08-28 | 2023-11-07 | 四川长宁天然气开发有限责任公司 | Intelligent scheduling method and system for shale gas fracturing engineering |
| CN111985833A (en) * | 2020-08-28 | 2020-11-24 | 四川长宁天然气开发有限责任公司 | Shale gas fracturing project intelligent scheduling method and system |
| CN112214886A (en) * | 2020-09-28 | 2021-01-12 | 中国石油天然气集团有限公司 | Evaluation method for capacity contribution rate based on carbon isotope analysis of natural gas |
| CN112211626A (en) * | 2020-10-30 | 2021-01-12 | 西南石油大学 | Optimization method for productivity well testing test type of heterogeneous gas reservoir gas well |
| CN112211626B (en) * | 2020-10-30 | 2022-03-11 | 西南石油大学 | Optimization method for productivity well testing test type of heterogeneous gas reservoir gas well |
| CN112561356B (en) * | 2020-12-21 | 2021-09-28 | 西安石油大学 | Comprehensive evaluation method for production dynamic mode and productivity of shale oil fracturing horizontal well |
| CN112561356A (en) * | 2020-12-21 | 2021-03-26 | 西安石油大学 | Comprehensive evaluation method for production dynamic mode and productivity of shale oil fracturing horizontal well |
| 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 |
| CN114198088A (en) * | 2021-12-16 | 2022-03-18 | 中国石油天然气股份有限公司 | Optimization method of decreasing method for predicting flowback volume of fracturing fluid after shale gas well pressure |
| CN114198088B (en) * | 2021-12-16 | 2024-03-29 | 中国石油天然气股份有限公司 | Optimal method for predicting decreasing method of fracturing fluid flowback volume after shale gas well fracturing |
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