CN108387930A - A kind of method of carbonate rock fault belt sealed harmonic drive - Google Patents
A kind of method of carbonate rock fault belt sealed harmonic drive Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 79
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 52
- 239000012530 fluid Substances 0.000 claims abstract description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003345 natural gas Substances 0.000 claims abstract description 15
- 206010027336 Menstruation delayed Diseases 0.000 claims abstract description 12
- 239000003208 petroleum Substances 0.000 claims abstract description 11
- 238000004445 quantitative analysis Methods 0.000 claims abstract description 11
- 238000011161 development Methods 0.000 claims abstract description 10
- 238000003325 tomography Methods 0.000 claims description 23
- 238000011156 evaluation Methods 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 15
- 238000010219 correlation analysis Methods 0.000 claims description 12
- 238000011160 research Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 238000010606 normalization Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000005012 migration Effects 0.000 abstract description 6
- 238000013508 migration Methods 0.000 abstract description 6
- 238000007619 statistical method Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 75
- 238000007789 sealing Methods 0.000 description 10
- 230000007423 decrease Effects 0.000 description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- 238000013459 approach Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
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Abstract
The invention discloses a kind of methods of carbonate rock fault belt sealed harmonic drive.Using Ordovician, tarim Basin carbonate rock as example, in early stage with oil charging, late period in the HYDROCARBON-BEARING REGION of natural gas origin, or in the HYDROCARBON-BEARING REGION that oil gas fills simultaneously, reflect the fluid parameter of oil-gas migration by selection or Geochemistry Parameters are for statistical analysis and normalized, obtains transporting coefficient, transporting distance, transporting attenuation coefficient.On this basis, carry out different carbonate rock fault belts or same crushed zone different parts, different fault walls, different layers position petroleum conduction ability quantitative analysis, to sentence the closure for knowing fault belt.Method is simple by the present invention, it is suitable for oil gas data more exploration assessment block and development block, the carbonate rock fault belt strong suitable for anisotropism, and the sealed harmonic drive of large-scale heterogeneous compact clastic rock fault belt, provide quick convenient new way for the sealed harmonic drive of fault belt.
Description
Technical field
The invention belongs to the assessment technique fields of Exploration of Oil And Gas and exploitation.More particularly, to a kind of carbonate rock
The method of fault belt sealed harmonic drive.
Background technology
To the relevant oil-gas migration and accumulation of tomography with for preservation, tomography is both the channel of petroleum conduction migration, and oil
Gas Aggregation indica blocks, and the closure of tomography is key problem, is the principal element for controlling oil gas scale and distribution.Tomography
Sealed harmonic drive includes Vertical Sealing Properties and lateral seal, and it is defeated to be directed not only to the longtitudinal dispersion discontinuously constructed inside fracture belt
Pathway, while being closely related with the sealing characteristics of tomography both sides（Yielding, et al., 2010）.
Fault sealing mechanism complexity is various, includes mainly shale smearing, cementation, cataclasis, depolymerisation
Deng（Yielding, et al., 2010; Pei et al., 2015）.Sand shale rendezvous method, mudstone creep method, section stress
Analytic approach etc. is popular fault sealing property quantitative evaluation method, and is obtained in the application of clastic rock Fault closeness evaluation
Obtained good effect.In the case where tomography is laterally opened, the fluid of two disk of tomography often have unified oil gas aqueous nature with
Oil gas water interface, and the fluid of closed on both sides has larger difference more, it in this way can also by the fluid detection of tomography both sides
Qualitative discrimination fault sealing property.The method that knowledge fault sealing property is sentenced by characteristic of fluid is commonly available to tomography both sides with docking
Oil-gas reservoir, this method mainly qualitatively differentiate.In very long earth history, the unlatching of tomography is absolute, and tomography
It is closed opposite, temporary, therefore, the closure of tomography often relatively for, accurate sentence knowledge there are no general
Method.
Research in recent years shows that large-scale fracture belt often has complicated three-dimensional structure and mineralizing evolution process, generally includes
Narrow tomographic nuclear and broad fault belt（Faulkner et al., 2010）.The transporting of fluid is often through more
Broad fault belt, and non-deformed strong fine and close tomographic nuclear（Caine et al., 1996; Aydin, 2000;
Childs et al., 2009; Choi et al., 2016）, the otherness of fault disruption zone band structure, which becomes, causes tomography to seal
Difficult one of the principal element of closing property evaluation.
Carbonate rock fault belt is more developed in oil-gas bearing basin, and for width up to thousands of rice, diagenesis is complicated more
Sample, cementing more strong with corrosion, anisotropism is extremely strong.And tomographic nuclear is often fault gouge or carbonate rock cement
Filling, oil gas are transported by fault belt transporting poly- mostly.Therefore, the routine evaluations method in clastic rock for two-dimensional cross-section is past
Toward the carbonate rock fault belt for not being suitable for 3 D complex structure.
Although the closure for carrying out study of fault from fault zone interior structure is most straightforward approach, since carbonate rock is disconnected
Layer crushed zone structural complexity, opposite joining relation, shale smearing, the cementing work of compacted zone and carrier bed inside carbonate rock
With etc. be difficult to effectively be sentenced knowledge, and the sample for test analysis is seldom got in underground, is still in the research and probe stage.
Invention content
The technical problem to be solved by the present invention is to overcome the defect of the above-mentioned prior art and deficiencies, pass through oil gas water or other fluid
Property（Such as gas-oil ratio）Or the quantitative analysis of the difference of FLUID GEOCHEMICAL component, transporting coefficient, transporting attenuation coefficient are obtained, from
And carry out different carbonate rock fault belts or the petroleum conduction ability of same fracture belt different parts, different fault walls
Quantitative analysis, provide it is a kind of according to the otherness of fluid carry out carbonate rock fault belt lateral seal evaluation and prediction
Method.
The object of the present invention is to provide a kind of methods of carbonate rock fault belt sealed harmonic drive.
Another object of the present invention is to provide the application of the carbonate rock fault belt sealed harmonic drive method.
Above-mentioned purpose of the present invention is achieved through the following technical solutions：
A kind of method of carbonate rock fault belt lateral seal evaluation is with oil charging, late period in early stage with natural
In the HYDROCARBON-BEARING REGION of gas filling, or in the HYDROCARBON-BEARING REGION that oil gas fills simultaneously, pass through fluid properties（Choose gas-oil ratio in example area）
Quantitative analysis, obtain transporting coefficient, transporting distance, transporting attenuation coefficient, to carry out different carbonate rock fault belts,
Or the quantitative analysis of the petroleum conduction ability of same fault belt different parts, different fault walls, to sentence knowledge fault disruption zone
The closure of band.
Wherein, the preparation method of the transporting coefficient is：On the carbonate rock fracture belt of oil-gas exploration and development, along carbonic acid
The layering of rock salt fault belt, subregion count the fluid properties of oil/gas well/Tibetan（Example is gas-oil ratio）；For same block or
Same fracture belt, is normalized fluid properties, and the numerical value after normalization is in 0~1 range；In early stage with oil
Filling, late period in the HYDROCARBON-BEARING REGION of natural gas origin, the difference of some fluid properties parameters（Such as gas-oil ratio）It can reflect tomography
The normalized parameter of the transporting capability of crushed zone, this kind of reflection fault belt migrating capability is referred to as transporting coefficient.
The preparation method of the transporting distance is：Transporting coefficient, which is dropped to country rock area at minimum inflection point, is determined as tomography
The distance of the outer boundary of crushed zone transporting, outer boundary to tomographic nuclear is determined as transporting distance.
Fault belt and its around on unified transporting path, transporting coefficient is with increase of the drilling well away from tomographic nuclear distance
And it reduces.The preparation method of the transporting attenuation coefficient is：By transporting coefficient and correlation analysis of the drilling well away from tomographic nuclear distance,
It can get the slope that transporting coefficient declines；The slope is bigger, shows that the transporting decaying of fault belt is faster, to the exhausted of the slope
Value is normalized, obtained numerical value is transporting attenuation coefficient.
Preferably as it is a kind of specifically can embodiment, the carbonate rock fault belt lateral seal evaluation
Method, include the following steps：
S1. it determines research area, is explained at figure by seismotectonics, determine the distribution of fracture belt；
S2. the gas-oil ratio of oil/gas well/Tibetan is counted along the layering of carbonate rock fault belt both sides, subregion；
S3. it is directed to same block or same fracture belt, gas-oil ratio is normalized, different well/Tibetan/blocks are obtained
Transporting coefficient；
S4. transporting coefficient does correlation analysis with distance, and transporting coefficient, which is dropped to country rock area at minimum inflection point, is determined as tomography
The outer boundary of crushed zone transporting；
S5. the distance of transporting outer boundary to tomographic nuclear is determined as transporting distance；
S6. by transporting coefficient and correlation analysis of the drilling well away from tomographic nuclear distance, the slope that transporting coefficient declines is obtained, is determined defeated
Lead attenuation coefficient；
S7. the transporting system of different carbonate rock fault belts or same fracture belt different parts, different fault walls is compared
Number, transporting attenuation coefficient sentence the relative size for the closure for knowing fault belt.
In addition, more specifically, the method for carbonate rock fault belt lateral seal evaluation includes following content：
（1）Fluid parameter counts：
On the relatively high carbonate rock fracture belt of oil-gas exploration and development degree, along the layering of carbonate rock fault belt, subregion
Count the fluid parameters and FLUID GEOCHEMICAL component etc. such as gas-oil ratio, oil density, the aridity coefficient of oil/gas well/Tibetan.
（2）The selection of parameter
In early stage with oil charging, late period in the HYDROCARBON-BEARING REGION of natural gas origin, or in the HYDROCARBON-BEARING REGION that oil gas fills simultaneously,
By oil gas water or other fluid property, change the comparative analyses of the parameters such as component, choose the parameter of effectively reflection fluid migration, example
Using gas-oil ratio.
（3）Obtain transporting coefficient：
For same block or same fracture belt, to gas-oil ratio（Or other parameters, it is similar below）It is normalized；
Numerical value after gas-oil ratio normalization is in 0~1 range；In early stage with oil charging, late period in the HYDROCARBON-BEARING REGION of natural gas origin,
Numerical value after gas-oil ratio normalization reflects fault belt to the degree of strength of natural gas transporting, referred to as transporting coefficient, defeated
It is as follows to lead coefficient formulas：
Tci=(Gi-Gmin)/(Gmax-Gmin) （1）
In formula, Tci is the transporting coefficient of i-th of gas-oil ratio, and Gi is i-th of gas-oil ratio numerical value of statistics（Or other parameters value）,
Gmax, Gmin are respectively the numerical value of minimum and maximum gas-oil ratio（Or other parameters value）；
Transporting coefficient can be used for representing the ability of fault belt transporting, can evaluate fault disruption zone according to the size of transporting coefficient
The power of ability with transporting；Transporting coefficient is bigger, and fault belt transporting capability is stronger, shows the closure of fault belt
It is poorer.
（4）Obtain transporting distance：
It in research area, determines that drilling well target zone transporting coefficient is dropped to country rock area at minimum inflection point, it is broken to be determined as tomography
The vertical range of the broken outer boundary with transporting, outer boundary to tomographic nuclear is determined as transporting distance（Ml）；It can be according to transporting distance
Size evaluates the good job of fault belt closure；Transporting distance is bigger, shows that the closure of fault belt is poorer, opens journey
Degree is higher.
（5）Obtain transporting attenuation coefficient：
In general, fault belt and its around on unified transporting path, transporting coefficient is with drilling well away from tomographic nuclear distance
Increase and reduce；Transporting coefficient may be decreased to background value（Substantially do not change）, take the above transporting coefficient of background value with away from
Tomographic nuclear distance does correlation analysis, can obtain the slope of transporting coefficient decline, the slope is bigger, shows fault belt
Transporting capability decaying is faster, and the absolute value of the slope is normalized, and obtained numerical value can be referred to as transporting decaying
Coefficient（Ma）；
In same fortune aggressiveness system, transporting attenuation coefficient usually has similar numerical value, and deviates transporting coefficient attenuation Trendline
Numerical value area may be not belonging to identical fortune aggressiveness system, have opposite closed performance.
（6）The evaluation of fault sealing property：
It is for statistical analysis to transporting coefficient, if local anomaly low value occurs in transporting coefficient, show at this as the closing of part
Area；If local anomaly high level occurs in transporting coefficient, oil gas convergence and the high-speed channel in current situation portion may be represented；
Transporting attenuation coefficient is bigger, and the openability and connectivity of fault belt are good；Transporting attenuation coefficient is smaller, shows transporting energy
Power decrease is faster, and the closure enhancing of fault belt is faster；If there is the mutation value of transporting attenuation coefficient, far from transporting system
Several distribution trends shows not to be same fortune aggressiveness system, it is likely that be relatively independent oil-gas reservoir, therebetween fault belt have compared with
Strong closure；
Different carbonate rock fault belts or same fracture belt can be carried out by transporting coefficient, transporting attenuation coefficient
The petroleum conduction ability comparison of different parts, different layers position, different fault walls, to sentence the closure for knowing fault belt.
In addition, the method for above-mentioned carbonate rock fault belt sealed harmonic drive is sentencing knowledge carbonate rock fault belt
Application in terms of closure, also within protection scope of the present invention.
Preferably, the carbonate rock fault belt refers to the strong carbonate rock fault belt of anisotropism or big
The heterogeneous compact clastic rock fault belt of type.
Preferably, the method is suitable for the more exploration assessment block and development block of oil gas data.
Since fault sealing property is often opposite, according to the relative size of the migrating capability of fault belt, Ke Yijin
The quantitative assessment of row fault belt closure.The characteristics of present invention is developed according to carbonate rock fault belt, in early stage stone
The fault belt that oil filling, the fault belt of late Gas filling or oil gas fill simultaneously, is changed by gas-oil ratio
Quantitative analysis, to achieve the effect that the seal-off effect to fault belt is evaluated.
The invention has the advantages that：
Petroleum conduction the present invention is based on the spatial variations of fluid for broad Zona transformans inside and its periphery provides more
Differentiation data by the statistical analysis to fluid properties, and carries out Mathematical treatment in dense matrix carbonate rock, be used for into
The evaluation of row fault belt lateral seal.
Method is simple by the present invention, is suitable for oil gas data more exploration assessment block and development block, is applicable in
In the carbonate rock fault belt that anisotropism is strong, and the closing of large-scale heterogeneous compact clastic rock fault belt
Property evaluation, for fault belt sealed harmonic drive provide fast convenient new way, oil exploration and exploitation can be instructed
Well site deployment.
Description of the drawings
Fig. 1 is 3 section transporting coefficient scatter plots of same ORDOVICIAN CARBONATE fault belt.
Fig. 2 is that 3 section transporting coefficient of same carbonate rock fault belt is schemed to away from oil-migrating fault apart from related.
Fig. 3 is different carbonate rock fault belt closure ideographs.
Specific implementation mode
It is further illustrated the present invention below in conjunction with Figure of description and specific embodiment, but embodiment is not to the present invention
It limits in any form.Unless stated otherwise, the present invention uses reagent, method and apparatus routinely try for the art
Agent, method and apparatus.
The method of 1 carbonate rock fault belt lateral seal of embodiment evaluation
A kind of method of carbonate rock fault belt lateral seal evaluation, includes the following steps：
S1. it determines research area, is explained at figure by seismotectonics, determine the distribution of fracture belt；
S2. the gas-oil ratio of oil/gas well/Tibetan is counted along the layering of carbonate rock fault belt both sides, subregion；
S3. it is directed to same block or same fracture belt, gas-oil ratio is normalized, obtains transporting coefficient；
S4. transporting coefficient does correlation analysis with distance, and transporting coefficient, which is dropped to country rock area at minimum inflection point, is determined as tomography
The outer boundary of crushed zone transporting；
S5. the distance of transporting outer boundary to tomographic nuclear is determined as transporting distance；
S6. by transporting coefficient and correlation analysis of the drilling well away from tomographic nuclear distance, the slope that transporting coefficient declines is obtained, is determined defeated
Lead attenuation coefficient；
S7. the transporting system of different carbonate rock fault belts or same fracture belt different parts, different fault walls is compared
Number, transporting attenuation coefficient sentence the relative size for the closure for knowing fault belt.
Specifically include the following contents：
（1）Fluid parameter counts：
On the relatively high carbonate rock fracture belt of oil-gas exploration and development degree, along the layering of carbonate rock fault belt, subregion
Count the fluid parameters and FLUID GEOCHEMICAL component etc. such as gas-oil ratio, oil density, the aridity coefficient of oil/gas well/Tibetan.
（2）The selection of parameter
In early stage with oil charging, late period in the HYDROCARBON-BEARING REGION of natural gas origin, or in the HYDROCARBON-BEARING REGION that oil gas fills simultaneously,
By oil gas water or other fluid property, change the comparative analyses of the parameters such as component, choose the parameter of effectively reflection fluid migration, example
Using gas-oil ratio.
（3）Obtain transporting coefficient：
For same block or same fracture belt, to gas-oil ratio（Or other parameters, it is similar below）It is normalized；
Numerical value after gas-oil ratio normalization is in 0~1 range；In early stage with oil charging, late period in the HYDROCARBON-BEARING REGION of natural gas origin,
Numerical value after gas-oil ratio normalization reflects fault belt to the degree of strength of natural gas transporting, referred to as transporting coefficient, defeated
It is as follows to lead coefficient formulas：
Tci=(Gi-Gmin)/(Gmax-Gmin) （1）
In formula, Tci is the transporting coefficient of i-th of gas-oil ratio, and Gi is i-th of gas-oil ratio numerical value of statistics（Or other parameters value）,
Gmax, Gmin are respectively the numerical value of minimum and maximum gas-oil ratio（Or other parameters value）；
Transporting coefficient can be used for representing the ability of fault belt transporting, can evaluate fault disruption zone according to the size of transporting coefficient
The power of ability with transporting；Transporting coefficient is bigger, and fault belt transporting capability is stronger, shows the closure of fault belt
It is poorer.
（4）Obtain transporting distance：
It in research area, determines that drilling well target zone transporting coefficient is dropped to country rock area at minimum inflection point, it is broken to be determined as tomography
The vertical range of the broken outer boundary with transporting, outer boundary to tomographic nuclear is determined as transporting distance（Ml）；It can be according to transporting distance
Size evaluates the good job of fault belt closure；Transporting distance is bigger, shows that the closure of fault belt is poorer, opens journey
Degree is higher.
（5）Obtain transporting attenuation coefficient：
In general, fault belt and its around on unified transporting path, transporting coefficient is with drilling well away from tomographic nuclear distance
Increase and reduce；Transporting coefficient may be decreased to background value（Substantially do not change）, take the above transporting coefficient of background value and bore
Well spacing tomographic nuclear distance does correlation analysis, can obtain the slope of transporting coefficient decline, the slope is bigger, shows fault disruption zone
The transporting capability decaying of band is faster, the absolute value of the slope is normalized, obtained numerical value can be referred to as transporting
Attenuation coefficient（Ma）；
In same fortune aggressiveness system, transporting attenuation coefficient usually has similar numerical value, and deviates transporting coefficient attenuation Trendline
Numerical value area may be not belonging to identical fortune aggressiveness system, have opposite closed performance.
（6）The evaluation of fault sealing property：
It is for statistical analysis to transporting coefficient, if local anomaly low value occurs in transporting coefficient, show at this as the closing of part
Area；If local anomaly high level occurs in transporting coefficient, oil gas convergence and the high-speed channel in current situation portion may be represented；
Transporting attenuation coefficient is bigger, and the openability and connectivity of fault belt are good；Transporting attenuation coefficient is smaller, shows transporting energy
Power decrease is faster, and the closure enhancing of fault belt is faster；If there is the mutation value of transporting attenuation coefficient, far from transporting system
Several distribution trends shows not to be same fortune aggressiveness system, it is likely that be relatively independent oil-gas reservoir, therebetween fault belt have compared with
Strong closure；
Different carbonate rock fault belts or same fracture belt can be carried out by transporting coefficient, transporting attenuation coefficient
The petroleum conduction ability comparison of different parts, different layers position, different fault walls, to sentence the closure for knowing fault belt.
2 Tarim Basin ORDOVICIAN CARBONATE area difference section carbonate rock fault belt closure of embodiment
Evaluation
In Tarim Basin ORDOVICIAN CARBONATE block, in early stage with oil charging, late period with the oil gas of natural gas origin
In area, by the quantitative analysis of gas-oil ratio, transporting coefficient, transporting distance, transporting attenuation coefficient are obtained, to carry out different carbonic acid
The relative size for knowing fault belt closure is sentenced in the quantitative analysis of the petroleum conduction ability of rock salt fault belt.
Wherein, the preparation method of the transporting coefficient is：
In the relatively high carbonate rock fault belt of oil-gas exploration and development degree, subregion counts the gas-oil ratio of oil/gas well/Tibetan, and
Count distance of the drilling well away from tomographic nuclear.
For same fault-fragmented different sections, gas-oil ratio is normalized and obtains transporting coefficient（Fig. 1）.Such as
Shown in Fig. 1, section 1, the high transporting coefficient value of section 2 are relatively more, and 3 transporting coefficient of section is generally relatively low, show section 1,
2 fault belt transporting capability of section is relatively strong, closure is poorer, and the transporting capability of 3 fault belt of section is weaker, closure
It is relatively strong.
Transporting coefficient drops to the outer boundary for being determined as fault belt transporting at minimum inflection point, outer boundary to country rock area
Distance to tomographic nuclear is determined as transporting distance（Fig. 2）.1 transporting of section distance as shown in Figure 2 most significantly, the side of fault belt
It is poor to closure.
Fault belt and its around on unified transporting path, transporting coefficient is with increase of the drilling well away from tomographic nuclear distance
And reduce, by transporting coefficient and correlation analysis of the drilling well away from tomographic nuclear distance of good relationship, transporting coefficient can be obtained
The slope of decline（Fig. 2）, and seek the transporting attenuation coefficient of different sections.2 transporting attenuation coefficient of section as shown in Figure 2 is big, table
The bright translocatable decrease outside along tomographic nuclear is fast, and closure enhancing is fast.1 fault disruption zone bandwidth of section is big, in larger distance
It is upper that there is larger transporting coefficient, opening degree higher.On different intra-segments and its periphery, in fact it could happen that local anomaly is low
Value shows at this as the enclosed area of part；If there is local anomaly high level, oil gas convergence and the height in current situation portion may be represented
Fast channel.
By transporting coefficient, transporting distance, transporting attenuation coefficient carry out same carbonate rock fault belt difference section,
The petroleum conduction ability of different fault walls compares, to sentence the relative closure size for knowing fault belt.
3 Tarim Basin ORDOVICIAN CARBONATE area difference carbonate rock fault belt closure of embodiment is commented
Valence
It is obtained by the quantitative analysis of different fracture belt gas-oil ratios in another Tarim Basin ORDOVICIAN CARBONATE block
Transporting coefficient, transporting distance, transporting attenuation coefficient, to carry out the petroleum conduction ability of different carbonate rock fault belts
The relative size for knowing fault belt closure is sentenced in quantitative analysis.It is specific as follows：
（1）Fracture belt selects：
On the basis of seismotectonics is explained at figure, fracture belt F1, F2, F3 that Fine structural interpretation is chosen determine that different tomographies are broken
The distribution of broken band.
（2）Fluid parameter counts：
On different carbonate rock fracture belts, gas-oil ratio, the original of oil/gas well/Tibetan are counted along carbonate rock fault belt subregion
The fluid parameters such as oil density, aridity coefficient.
（3）The selection of parameter：
By oil gas water or other fluid property, change the comparative analyses of the parameters such as component, choose the parameter of effectively reflection fluid migration,
Comparative analysis shows that the effect of wherein gas-oil ratio is preferable.
（4）Obtain transporting coefficient：
For different carbonate rock fault belts, gas-oil ratio is normalized with unified standard, obtains transporting system
Number.
Gas-oil ratio wherein on F1 fault disruption zones band is high, and based on condensate gas, transporting coefficient is significantly greater, shows that tomography is broken
Broken band transporting capability is strong, and the closure of fault belt is poorer.And the gas-oil ratio of F2, F3 fault belt it is low, with normal crude oil
Based on, transporting coefficient is obviously relatively low.
（5）Obtain transporting distance：
It in research area, determines that drilling well target zone transporting coefficient is dropped to country rock area at minimum inflection point, it is broken to be divided into tomography
The vertical range of the broken outer boundary with transporting, outer boundary to tomographic nuclear is determined as transporting distance（Ml）.
（6）Obtain transporting attenuation coefficient：
According to transporting coefficient with the variation of transporting distance, the background value of transporting coefficient is determined.Take the above transporting coefficient of background value with
Do correlation analysis of the drilling well away from tomographic nuclear distance obtains the descending slope of the higher transporting coefficient of correlation, to the exhausted of the slope
Value is normalized, obtained numerical value is transporting attenuation coefficient（Ma）.
On F2, F3 fault disruption zone band, transporting attenuation coefficient is low, and has similar numerical value, shows fluid properties difference
Small, fault belt closure is stronger.F1 fault belt transporting coefficient attenuations are more apparent, the translocation having had, closing
Performance is relatively poor.
（7）The evaluation of fault sealing property：
For statistical analysis to transporting coefficient, F2, F3 transporting coefficient value are low, difference is small, lack later stage natural gas origin, for part
Enclosed area.The gas-oil ratio of F1 fault belts is high, and transporting coefficient is high, and transporting attenuation coefficient is big, the openability of fault belt
It is good with connectivity.
Comprehensive analysis shows（Fig. 3）, F1 fault belts opening degree is high, closure is weaker, a large amount of to late period occur
Natural gas gas cut form the gas condensate reservoir of high gas-oil ratio (HGOR) on the basis of early stage Foregone pool.And in F2, F3 fault belt
Closure is strong, opening degree is low, and fault belt has stronger closure therebetween.Since fault belt is closed, lacks and
From the natural gas gas cut in fracture belt deep layer late period, while the natural gas of lateral upper F1 fault belt transportings not yet arrives at, and is formed
Local reservoir region.
Due to the different parts of different fault belts or same fault crushed zone, different layers position, different fault wall
Close sex differernce, cause the difference of late Gas transporting capability, so as to form area's hydrocarbon fluids property complexity with
Diversity.On the basis of this method and its principle, it is easy to it is for statistical analysis using different fluid property or ground component,
Improvement establishes different fault belt closure and sentences knowledge pattern, instructs geological knowledge and the oil-gas exploration of this kind of complex reservoir
Development Practice.
Claims (8)
1. a kind of method of carbonate rock fault belt lateral seal evaluation, which is characterized in that filled with oil in early stage
Note, late period in the HYDROCARBON-BEARING REGION of natural gas origin, or in the HYDROCARBON-BEARING REGION that oil gas fills simultaneously, pass through quantifying for fluid properties
Analysis obtains transporting coefficient, transporting distance, transporting attenuation coefficient, to carry out different carbonate rock fault belts, or it is same
The quantitative analysis of the petroleum conduction ability of one fault belt different parts, different fault walls, to sentence the envelope for knowing fault belt
Closing property.
2. the method for carbonate rock fault belt sealed harmonic drive according to claim 1, which is characterized in that the transporting
The preparation method of coefficient is：On the carbonate rock fracture belt of oil-gas exploration and development, along the layering of carbonate rock fault belt, divide
Area counts the fluid properties of oil/gas well/Tibetan；For same block or same fracture belt, place is normalized to fluid properties
Reason, the numerical value after normalization is in 0~1 range；In early stage with oil charging, late period in the HYDROCARBON-BEARING REGION of natural gas origin, to flow
The difference of volume property parameter reflects the transporting capability of fault belt, the normalization of this kind of reflection fault belt migrating capability
Parameter is referred to as transporting coefficient.
3. the method for carbonate rock fault belt sealed harmonic drive according to claim 1, it is characterised in that the transporting
The preparation method of distance is：Transporting coefficient drops to the outside for being determined as fault belt transporting at minimum inflection point to country rock area
The distance on boundary, outer boundary to tomographic nuclear is determined as transporting distance.
4. the method for carbonate rock fault belt sealed harmonic drive according to claim 1, which is characterized in that broken in tomography
On broken band and its transporting path unified around, transporting coefficient is reduced with the increase away from tomographic nuclear distance；The transporting decaying
The preparation method of coefficient is：By transporting coefficient and correlation analysis of the drilling well away from tomographic nuclear distance, can obtain under transporting coefficient
The slope of drop；The slope is bigger, shows that the transporting decaying of fault belt is faster, place is normalized to the absolute value of the slope
Reason, obtained numerical value are referred to as transporting attenuation coefficient.
5. the method for carbonate rock fault belt sealed harmonic drive according to claim 1, which is characterized in that including as follows
Step：
S1. it determines research area, is explained at figure by seismotectonics, determine the distribution of fracture belt；
S2. the fluid properties of oil/gas well/Tibetan are counted along the layering of carbonate rock fault belt both sides, subregion；
S3. it is directed to same block or same fracture belt, Selecting All Parameters are normalized, different well/Tibetan/areas are obtained
The transporting coefficient of block；
S4. transporting coefficient with away from tomographic nuclear distance do correlation analysis, transporting coefficient drops to true at minimum inflection point to country rock area
It is set to the outer boundary of fault belt transporting；
S5. the distance of transporting outer boundary to tomographic nuclear is determined as transporting distance；
S6. by transporting coefficient and correlation analysis of the drilling well away from tomographic nuclear distance, the slope that transporting coefficient declines is obtained, it is as defeated
Lead attenuation coefficient；
S7. the transporting system of different carbonate rock fault belts or same fracture belt different parts, different fault walls is compared
Number, transporting distance, transporting attenuation coefficient, sentence the relative size for the closure for knowing fault belt.
6. to know carbonate rock disconnected sentencing for the method for any carbonate rock fault belt sealed harmonic drive of Claims 1 to 5
Application in terms of the closure of layer crushed zone.
7. application according to claim 6, it is characterised in that the carbonate rock fault belt refers to that anisotropism is strong
The heterogeneous compact clastic rock fault belt of strong carbonate rock fault belt or large size.
8. application according to claim 6, it is characterised in that the method is suitable for the more exploration assessment of oil gas data
Block and development block.
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| CN110259439A (en) * | 2019-05-30 | 2019-09-20 | 中国石油大学(北京) | For evaluating the method and device of carbonate rock fault sealing property Evolutionary History |
| CN110619490A (en) * | 2019-10-24 | 2019-12-27 | 西南石油大学 | Method for evaluating cementing sealing performance of fractured and crushed compact carbonate rock zone |
| CN110618456A (en) * | 2019-10-24 | 2019-12-27 | 西南石油大学 | Method for determining years of multi-period active fracture of sedimentary basin |
| CN110764161A (en) * | 2019-10-24 | 2020-02-07 | 西南石油大学 | Comprehensive method for judging and identifying fractured and broken zone of carbonate rock through drilling data |
| CN112184033A (en) * | 2020-09-30 | 2021-01-05 | 中国石油化工股份有限公司 | Carbonate rock stratum fault sealing evaluation method |
| WO2023138187A1 (en) * | 2022-01-21 | 2023-07-27 | 中国石油大学(华东) | Method and system for quantitatively assessing sealing performance of shale system |
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