CN109142682A - A kind of unit volume rock void fraction and formation testing effect evaluation method - Google Patents
A kind of unit volume rock void fraction and formation testing effect evaluation method Download PDFInfo
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Abstract
The invention discloses a kind of unit volume rock void fractions and formation testing effect evaluation method, the specific steps of which are as follows: acquiring, handling, store, record and calculating in real time by moral Ma engineering logging instrument, gas detection logging analyzer, every logging parameters are obtained, gas surveys parameter, calculates research well interval of interest unit volume rock void fraction with brill engineering parameter.Binding analysis difference oiliness, the formation testing of the reservoir for having drilled well of layer group, pressure break data, characterized by Mathematical Fitting, preferably the key parameter of reservoir fluid and evaluating production capacity, to lay a good foundation for reservoir productivity quantitative assessment.The present invention is to establish the quantitative assessment of well logging response characteristic Yu formation testing effect, improves logging explanation coincidence rate.
Description
Technical field
The present invention relates to unit rock volume void fractions and formation testing effect evaluation method, are suitable for petroleum geology exploration and lead
Domain, especially suitable for industries such as well logging and formation testings.
Background technique
Underground oil test operation is that the most basic means of production capacity are sought in oil-gas Layer exploration, but formation testing result usually with prediction phase
It is contrary to, increases construction cost, causes unnecessary waste.Meanwhile unreasonable oil test operation technology may also destroy oil-gas Layer
Structure, reduce productivity of hydrocarbon.Therefore, before formation testing work is carried out, seem especially to the quantitative calculating of reservoir productivity prediction
It is important.Currently, Exploration Domain develops towards compacted zone, and the hypotonic characteristic of compact reservoir and the high temperature and pressure characteristic of deep-well are given
Formation testing work brings very big difficulty, and how economic, time saving, targeted oil test operation is extremely urgent.The method of the present invention
While making full use of well logging, Gas logging data, in conjunction with data such as drilling well, well logging, formation testings, characterized by Mathematical Fitting, preferably
The key parameter of reservoir fluid and evaluating production capacity, to lay a good foundation for reservoir productivity quantitative assessment.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of methods of quantitative assessment formation testing effect, can determine in advance
Predicting reservoir production capacity is measured, the fuel-displaced accuracy rate of formation testing is improved, to improve logging explanation coincidence rate.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that: a kind of unit volume rock void fraction with
Formation testing effect evaluation method, comprising the following steps:
(1) it acquires, handle, store, record and calculates in real time by moral Ma engineering logging instrument, gas detection logging analyzer, obtain
Parameter is surveyed to every engineering, gas, for calculating the unit volume rock void fraction of interval of interest；
(2) blockette point oiliness does correlation analysis to unit volume void fraction and formation testing relationship, is obtained by Mathematical Fitting
To production capacity quantitative evaluation formula, the reservoir production capacity of reservoir productivity judgement schematics prediction interval of interest is utilized.
In the step (1), the parameter for the reflection hydrocarbonaceous substance in reservoir that gas detection logging analyzer obtains, including total hydrocarbon
TG content and chromatographic component content, chromatographic component refer to methane C1, ethane C2, propane C3, iso-butane iC4, normal butane nC4, isoamyl
Alkane iC5, pentane nC5。
In the step (1), moral Ma engineering logging instrument obtains reflection reservoir drillability and thickness and drillng operation state
Engineering logging parameter, including ROP, min/m when brill；Buried depth H, m；Borehole diameter D, mm；Standpipe pressure P, MPa；Drilling fluid outlet
Discharge capacity Q, L；Drilling fluid pot volume V, m3；Drilling fluid outlet density p, g/cm3；Drilling fluid outlet temperature TOutlet, DEG C.
In the step (1), by probability statistics and simple regression analysis, formation temperature T is obtainedGround temperatureWith the meter of buried depth H
Calculate formula: TGround temperature=14+0.035* (H-20)+273.15；By analysis different regions, the well data of distinct device model, obtain
Geothermal gradient G and outlet temperature TOutletConversion formula: TOutlet=0.254*G+27.08, temperature unit: DEG C, buried depth unit: m,
Geothermal gradient unit: DEG C/km；Calculate the subsurface unit volume rock void fraction S of interval of interestg, subsurface unit volume rock contains
Gas rate formula:Cn: component Gas Logging Value, En: each component degassing effect
Rate coefficient, Zn: deviation compression coefficient, t: when brill, min/m, Q: discharge capacity, m3；H: buried depth, m, Gt: geothermal gradient, DEG C/km, D: well
Eye diameter, mm, TOutlet: drilling fluid outlet temperature DEG C, ρ: drilling fluid density, g/cm3。
In the step (2), by collecting light oil, middle matter oil, mink cell focus, the well logging of fine and close oil, formation testing, pressure break money
Material, the well logging for 20 blocks of reviving, gas testing data, to void fraction SgCorrelation analysis is done with formation testing, fracturing effect；Pass through Mathematical Fitting
Obtain 10 reservoir productivity Q judgement schematics, wherein regardless of oiliness well, reservoir productivity evaluates total formula 2；By oiliness and pressure break
Situation, foundation divides oiliness reservoir productivity judgement schematics 8, wherein Q unit t in (1)-(9), Q unit 10 in (10)4×m3:
(1) the case where being suitable for exploration initial stage, can not judging basin oil-containing property, the well of direct formation testing:
Q=-65.124Sg 2+93.326Sg+9.3774
(2) it is suitable for exploration initial stage sandstone reservoir, needs the well of fracturing reform:
Q=56.877Sg 2+67.069Sg+4.9502
(3) it is suitable for sandstone reservoir, basin oil-gas possibility has light oil feature, relative oil density < 0.87g/
cm3, the well of direct formation testing:
Q=1073.2Sg 2-113.69Sg+18.839
(4) it is suitable for sandstone reservoir, basin oil-gas possibility has light oil feature, relative oil density < 0.87g/
cm3, need the well of fracturing reform:
Q=651.65Sg 2-51.256Sg+6.3913
(6) it is suitable for sandstone reservoir, basin oil-gas possibility has middle matter oil feature, 0.88g/cm3< relative oil density
<0.92g/cm3, the well of direct formation testing:
Q=-26.69Sg 2+45.248Sg+18.049
(6) it is suitable for sandstone reservoir, basin oil-gas possibility has middle matter oil feature, 0.88g/cm3< relative oil density
<0.92g/cm3, need the well of fracturing reform:
Q=62.494Sg 2+46.144Sg+11.287
(7) it is suitable for sandstone reservoir, basin oil-gas possibility has heavy oil characterization, relative oil density > 0.93g/
cm3, the well of direct formation testing:
Q=-16.462Sg 2+35.334Sg+5.5543
(8) it is suitable for sandstone reservoir, basin oily has heavy oil characterization, relative oil density > 0.93g/cm3,
Need the well of fracturing reform:
Q=-180.31Sg 2+78.609Sg+5.364
(9) it is suitable for sandstone reservoir, basin oily has fine and close oily feature, needs the well of fracturing reform:
Q=-493.28Sg 2+330.38Sg+5.4247
(10) it is suitable for sandstone reservoir, basin oily has tight gas feature, needs the well of fracturing reform:
Q=-14.339Sg 2+17.174Sg+1.244
Wherein,
Fine and close oil, which refers to, to be clipped in or close in the compact clastic rock or carbonate reservoir of high-quality oil-degrading bacteria system, without
Extensive long-distance migration and the oil accumulation formed could form work by massive hydraulic fracture technology without natural production capacity is stablized
Industry production capacity, the physical property boundary of compacted zone are determined as ground level air infiltration rate and are less than 0.1mD less than 1mD, underground overburden permeability；
Tight gas, which refers to cover, is stored in permeability less than 0.1mD, the natural gas in sandstone reservoir of the porosity less than 10%,
General gas saturation<60%, water saturation>40%.
Examination is closed for multilayer and asks production, does single layer weighted average:
Interval of interest predicts that production capacity is greater than industry oil, air-flow standard, proposes formation testing suggestion, industry oil, air-flow standard reference
Petroleum industry standard SY/T6293-2008 " exploration formation testing job specification "
Commercial hydrocarbon flow standard
| Payzone buried depth (m) | Commercial oil lower limit (t/d) | Industrial gas lower limit (m3/d) |
| <1000 | 0.5 | 1000 |
| 1000~2000 | 1.0 | 3000 |
| 2000~3000 | 3.0 | 5000 |
| 3000~4000 | 5.0 | 10000 |
| >4000 | 10.0 | 10000 |
The beneficial effects of the present invention are: providing a kind of method using Gas logging data quantitative assessment formation testing effect, Ke Yiti
Preceding quantitative forecast reservoir productivity, to improve the fuel-displaced accuracy rate of formation testing.
Detailed description of the invention
Fig. 1 is the flow chart of unit volume rock void fraction quantitative assessment formation testing effect of the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description:
As shown in Figure 1, unit volume rock void fraction of the invention and formation testing effect evaluation method, comprising the following steps:
(1) it acquires, handle, store, record and calculates in real time by moral Ma engineering logging instrument, gas detection logging analyzer, obtain
Parameter is surveyed to every engineering, gas, for calculating the unit volume rock void fraction of interval of interest；
(2) blockette point oiliness does correlation analysis to unit volume void fraction and formation testing relationship, is obtained by Mathematical Fitting
To production capacity quantitative evaluation formula, the reservoir production capacity of reservoir productivity judgement schematics prediction interval of interest is utilized.
In the step (1), the parameter for the reflection hydrocarbonaceous substance in reservoir that gas detection logging analyzer obtains, including total hydrocarbon
TG content and chromatographic component content, chromatographic component refer to methane C1, ethane C2, propane C3, iso-butane iC4, normal butane nC4, isoamyl
Alkane iC5, pentane nC5。
In the step (1), moral Ma engineering logging instrument obtains reflection reservoir drillability and thickness and drillng operation state
Engineering logging parameter, including ROP, min/m when brill；Buried depth H, m；Borehole diameter D, mm；Standpipe pressure P, MPa；Drilling fluid outlet
Discharge capacity Q, L；Drilling fluid pot volume V, m3；Drilling fluid outlet density p, g/cm3；Drilling fluid outlet temperature TOutlet, DEG C.
In the step (1), by probability statistics and simple regression analysis, formation temperature T is obtainedGround temperatureWith the meter of buried depth H
Calculate formula: TGround temperature=14+0.035* (H-20)+273.15；By analysis different regions, the well data of distinct device model, obtain
Geothermal gradient G and outlet temperature TOutletConversion formula: TOutlet=0.254*G+27.08, temperature unit: DEG C, buried depth unit: m,
Geothermal gradient unit: DEG C/km；Calculate the subsurface unit volume rock void fraction S of interval of interestg, subsurface unit volume rock contains
Gas rate formula:Cn: component Gas Logging Value, En: each component degassing effect
Rate coefficient, Zn: deviation compression coefficient, t: when brill, min/m, Q: discharge capacity, m3；H: buried depth, m, Gt: geothermal gradient, DEG C/km, D: well
Eye diameter, mm, TOutlet: drilling fluid outlet temperature DEG C, ρ: drilling fluid density, g/cm3。
In the step (2), by collecting light oil, middle matter oil, mink cell focus, the well logging of fine and close oil, formation testing, pressure break money
Material, the well logging for 20 blocks of reviving, gas testing data, to void fraction SgCorrelation analysis is done with formation testing, fracturing effect；Pass through Mathematical Fitting
Obtain 10 reservoir productivity Q judgement schematics, wherein regardless of oiliness well, reservoir productivity evaluates total formula 2；By oiliness and pressure break
Situation, foundation divides oiliness reservoir productivity judgement schematics 8, wherein Q unit t in (1)-(9), Q unit 10 in (10)4×m3:
(1) the case where being suitable for exploration initial stage, can not judging basin oil-containing property, the well of direct formation testing:
Q=-65.124Sg 2+93.326Sg+9.3774
(2) it is suitable for exploration initial stage sandstone reservoir, needs the well of fracturing reform:
Q=56.877Sg 2+67.069Sg+4.9502
(3) it is suitable for sandstone reservoir, basin oil-gas possibility has light oil feature, relative oil density < 0.87g/
cm3, the well of direct formation testing:
Q=1073.2Sg 2-113.69Sg+18.839
(4) it is suitable for sandstone reservoir, basin oil-gas possibility has light oil feature, relative oil density < 0.87g/
cm3, need the well of fracturing reform:
Q=651.65Sg 2-51.256Sg+6.3913
(7) it is suitable for sandstone reservoir, basin oil-gas possibility has middle matter oil feature, 0.88g/cm3< relative oil density
<0.92g/cm3, the well of direct formation testing:
Q=-26.69Sg 2+45.248Sg+18.049
(6) it is suitable for sandstone reservoir, basin oil-gas possibility has middle matter oil feature, 0.88g/cm3< relative oil density
<0.92g/cm3, need the well of fracturing reform:
Q=62.494Sg 2+46.144Sg+11.287
(7) it is suitable for sandstone reservoir, basin oil-gas possibility has heavy oil characterization, relative oil density > 0.93g/
cm3, the well of direct formation testing:
Q=-16.462Sg 2+35.334Sg+5.5543
(8) it is suitable for sandstone reservoir, basin oily has heavy oil characterization, relative oil density > 0.93g/cm3,
Need the well of fracturing reform:
Q=-180.31Sg 2+78.609Sg+5.364
(9) it is suitable for sandstone reservoir, basin oily has fine and close oily feature, needs the well of fracturing reform:
Q=-493.28Sg 2+330.38Sg+5.4247
(10) it is suitable for sandstone reservoir, basin oily has tight gas feature, needs the well of fracturing reform:
Q=-14.339Sg 2+17.174Sg+1.244
Wherein,
Fine and close oil, which refers to, to be clipped in or close in the compact clastic rock or carbonate reservoir of high-quality oil-degrading bacteria system, without
Extensive long-distance migration and the oil accumulation formed could form work by massive hydraulic fracture technology without natural production capacity is stablized
Industry production capacity, the physical property boundary of compacted zone are determined as ground level air infiltration rate and are less than 0.1mD less than 1mD, underground overburden permeability；
Tight gas, which refers to cover, is stored in permeability less than 0.1mD, the natural gas in sandstone reservoir of the porosity less than 10%,
General gas saturation<60%, water saturation>40%.
Examination is closed for multilayer and asks production, does single layer weighted average:
Interval of interest predicts that production capacity is greater than industry oil, air-flow standard, proposes formation testing suggestion, industry oil, air-flow standard reference
Petroleum industry standard SY/T6293-2008 " exploration formation testing job specification "
Commercial hydrocarbon flow standard
| Payzone buried depth (m) | Commercial oil lower limit (t/d) | Industrial gas lower limit (m3/d) |
| <1000 | 0.5 | 1000 |
| 1000~2000 | 1.0 | 3000 |
| 2000~3000 | 3.0 | 5000 |
| 3000~4000 | 5.0 | 10000 |
| >4000 | 10.0 | 10000 |
New well field test outcome table in 2017
1 reservoir productivity of table evaluates total formula
| Measure | Evaluating production capacity formula | Related coefficient | Conclusion |
| Direct Pressure Curve in Oil Testing Well | Q=-65.124Sg 2+93.326Sg+9.3774 | 0.5563 | Preferably |
| Fractured well | Q=56.877Sg 2+67.069Sg+4.9502 | 0.6701 | It is good |
Table 2 divides oiliness reservoir productivity judgement schematics
This method be by field test huge port You Qu in 2017, Soviet Union 20 block stepout wells, formation testing well section capability forecasting with
The practical daily output coincide substantially, reaches optimization for industry, provides to improve the oil and gas composite interpretation and evaluation coincidence rate of well logging
Foundation.
In conclusion the contents of the present invention are not limited in the above embodiments, the knowledgeable people in same area can
To propose other embodiments easily within technological guidance's thought of the invention, but this embodiment be included in it is of the invention
Within the scope of.
Claims (7)
1. a kind of unit volume rock void fraction and formation testing effect evaluation method, which comprises the following steps:
(1) it acquires, handle, store, record and calculates in real time by moral Ma engineering logging instrument, gas detection logging analyzer, obtain each
Item engineering, gas survey parameter, for calculating the unit volume rock void fraction of interval of interest；
(2) blockette point oiliness does correlation analysis to unit volume void fraction and formation testing relationship, is produced by Mathematical Fitting
Energy quantitative evaluation formula utilizes the reservoir production capacity of reservoir productivity judgement schematics prediction interval of interest.
2. unit volume rock void fraction and formation testing effect evaluation method according to claim 1, which is characterized in that the step
Suddenly in (1), the parameter for the reflection hydrocarbonaceous substance in reservoir that gas detection logging analyzer obtains, including total hydrocarbon TG content and chromatography group
Divide content, chromatographic component refers to methane C1, ethane C2, propane C3, iso-butane iC4, normal butane nC4, isopentane iC5, pentane
nC5。
3. unit volume rock void fraction and formation testing effect evaluation method according to claim 1, which is characterized in that the step
Suddenly in (1), moral Ma engineering logging instrument obtains the engineering logging parameter of reflection reservoir drillability and thickness and drillng operation state, packet
T, min/m when including brill；Buried depth H, m；Borehole diameter D, mm；Standpipe pressure P, MPa；Drilling fluid outlet discharge capacity Q, L；Drilling fluid pond body
Product V, m3；Drilling fluid outlet density p, g/cm3；Drilling fluid outlet temperature TOutlet, DEG C.
4. unit volume rock void fraction and formation testing effect evaluation method according to claim 1, which is characterized in that the step
Suddenly in (1), by probability statistics and simple regression analysis, formation temperature T is obtainedGround temperatureWith the calculation formula of buried depth H: TGround temperature=14
+0.035*(H-20)+273.15；By analysis different regions, distinct device model well data, obtain geothermal gradient G with
Outlet temperature TOutletConversion formula: TOutlet=0.254*G+27.08, temperature unit: DEG C, buried depth unit: m, geothermal gradient unit:
℃/km；Calculate the subsurface unit volume rock void fraction S of interval of interestg, subsurface unit volume rock void fraction formula:
Component Gas Logging Value, En: each component degassing efficiency system
Number, Zn: deviation compression coefficient, t: when brill, min/m, Q: discharge capacity, m3；H: buried depth, m, Gt: geothermal gradient, DEG C/km, D: wellbore is straight
Diameter, mm, TOutlet: drilling fluid outlet temperature DEG C, ρ: drilling fluid density, g/cm3。
5. unit volume rock void fraction and formation testing effect evaluation method according to claim 4, which is characterized in that the step
Suddenly in (2), by collecting light oil, middle matter oil, mink cell focus, the well logging of fine and close oil, formation testing, pressure break data, the record for 20 blocks of reviving
Well, gas testing data, to void fraction SgCorrelation analysis is done with formation testing, fracturing effect；10 reservoirs are obtained by Mathematical Fitting to produce
Energy Q judgement schematics, wherein regardless of oiliness well, reservoir productivity evaluates total formula 2；By oiliness and pressure break situation, foundation divides oiliness
Reservoir productivity judgement schematics 8, wherein Q unit t in (1)-(9), Q unit 10 in (10)4×m3:
(1) the case where being suitable for exploration initial stage, can not judging basin oil-containing property, the well of direct formation testing:
Q=-65.124Sg 2+93.326Sg+9.3774
(2) it is suitable for exploration initial stage sandstone reservoir, needs the well of fracturing reform:
Q=56.877Sg 2+67.069Sg+4.9502
(3) it is suitable for sandstone reservoir, basin oil-gas possibility has light oil feature, relative oil density < 0.87g/cm3, directly
The well of formation testing:
Q=1073.2Sg 2-113.69Sg+18.839
(4) it is suitable for sandstone reservoir, basin oil-gas possibility has light oil feature, relative oil density < 0.87g/cm3, need
The well of fracturing reform:
Q=651.65Sg 2-51.256Sg+6.3913
(5) it is suitable for sandstone reservoir, basin oil-gas possibility has middle matter oil feature, 0.88g/cm3< relative oil density <
0.92g/cm3, the well of direct formation testing:
Q=-26.69Sg 2+45.248Sg+18.049
(6) it is suitable for sandstone reservoir, basin oil-gas possibility has middle matter oil feature, 0.88g/cm3< relative oil density <
0.92g/cm3, need the well of fracturing reform:
Q=62.494Sg 2+46.144Sg+11.287
(7) it is suitable for sandstone reservoir, basin oil-gas possibility has heavy oil characterization, relative oil density > 0.93g/cm3, directly
The well of formation testing:
Q=-16.462Sg 2+35.334Sg+5.5543
(8) it is suitable for sandstone reservoir, basin oily has heavy oil characterization, relative oil density > 0.93g/cm3, need to press
Split the well of transformation:
Q=-180.31Sg 2+78.609Sg+5.364
(9) it is suitable for sandstone reservoir, basin oily has fine and close oily feature, needs the well of fracturing reform:
Q=-493.28Sg 2+330.38Sg+5.4247
(10) it is suitable for sandstone reservoir, basin oily has tight gas feature, needs the well of fracturing reform:
Q=-14.339Sg 2+17.174Sg+1.244
Wherein,
Fine and close oil, which refers to, to be clipped in or close in the compact clastic rock or carbonate reservoir of high-quality oil-degrading bacteria system, without excessive rule
Mould long-distance migration and the oil accumulation formed could form industrial production by massive hydraulic fracture technology without natural production capacity is stablized
Can, the physical property boundary of compacted zone is determined as ground level air infiltration rate and is less than 0.1mD less than 1mD, underground overburden permeability；
Tight gas, which refers to cover, is stored in permeability less than 0.1mD, the natural gas in sandstone reservoir of the porosity less than 10%, gassiness
Saturation degree<60%, water saturation>40%.
6. unit volume rock void fraction and formation testing effect evaluation method according to claim 5, which is characterized in that for more
Production is asked in laminated examination, does single layer weighted average:
7. unit volume rock void fraction and formation testing effect evaluation method according to claim 5, which is characterized in that target zone
Section prediction production capacity is greater than industry oil, air-flow standard, proposes formation testing suggestion, industry oil, air-flow standard are referring to petroleum industry standard SY/
T6293-2008 " exploration formation testing job specification ".
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| CN110608032A (en) * | 2019-09-18 | 2019-12-24 | 中国石油集团长城钻探工程有限公司录井公司 | Oil well yield prediction method based on light hydrocarbon logging and computer equipment |
| CN114428166A (en) * | 2020-09-29 | 2022-05-03 | 中国石油化工股份有限公司 | Method and system for evaluating oil-gas-containing property of stratum |
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| CN110608032A (en) * | 2019-09-18 | 2019-12-24 | 中国石油集团长城钻探工程有限公司录井公司 | Oil well yield prediction method based on light hydrocarbon logging and computer equipment |
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| CN114428166A (en) * | 2020-09-29 | 2022-05-03 | 中国石油化工股份有限公司 | Method and system for evaluating oil-gas-containing property of stratum |
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