CN105840175A - Three-dimensional fracture modeling method - Google Patents
Three-dimensional fracture modeling method Download PDFInfo
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- CN105840175A CN105840175A CN201610152171.5A CN201610152171A CN105840175A CN 105840175 A CN105840175 A CN 105840175A CN 201610152171 A CN201610152171 A CN 201610152171A CN 105840175 A CN105840175 A CN 105840175A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000011161 development Methods 0.000 claims abstract description 43
- 239000011435 rock Substances 0.000 claims abstract description 22
- 238000003384 imaging method Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract 2
- 208000010392 Bone Fractures Diseases 0.000 claims description 28
- 206010017076 Fracture Diseases 0.000 claims description 28
- 238000005336 cracking Methods 0.000 claims description 17
- 238000002474 experimental method Methods 0.000 claims description 11
- 238000011160 research Methods 0.000 claims description 9
- 206010002961 Aplasia Diseases 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 claims description 6
- 230000005251 gamma ray Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a three-dimensional fracture modeling method; the method comprises the following steps: carrying out conventional logging and imaging logging in sequence; excluding non-fracture developing well segments, and keeping fracture developing well segments; carrying out VSP logging and well wall coring on the kept well segments; carrying out electron microscope scanning, porosity measuring and rock strain tests on the obtained rock core; combining logging interpretation, and using modeling software to build a single well sectional fracture developing model; using various single well models in a same area to build a stratum three-dimensional fracture developing model. The three-dimensional fracture modeling method can carry out complete and accurate modeling analysis for the whole reservoir stratum fractures in an early development stage.
Description
Technical field
The present invention relates to geological exploration and development field, relate in particular to three-dimensional cracking modeling method.
Background technology
The method of Reservoirs evaluation and application thereof, always be exploration of oil and gas field and the important step in development process
One of.From the point of view of oil-gas field development angle, the research of Reservoirs feature is to improve the rate of oil and gas recovery, improvement development effectiveness
Important means, especially for the matrix reservoirs of some low porosity and low permeabilities, the existence of intrinsic fracture is likely to will not have extraction value
Oil reservoir displacement there is the oil reservoir developed of economic benefit.Additionally, along with the minimizing day by day of conventional Porous Reservoir reserves, often
Rule hole reservoir exploitation difficulty is gradually increased, and the exploration trend of oil and gas is gradually turned to deep by shallow stratum, by often
Rule oil-gas reservoir turns on special oil and gas pools, may the fractured reservoirs of unusual high yield be but the most critically important as being difficult to predict
A kind of research direction.In a word, during the exploration and development to fossil energy, the research to Reservoir Fracture is in the heaviest
Want status.But, Reservoir Fracture evaluation of the prior art is all dependent on conventional geology means, in the storage acquired by the prospect pit stage
Layer fracture evaluation data is difficult to complete, abundant, can not carry out on a large scale again coring or ground in the production development stage simultaneously
Matter research work, when often resulting in block exploitation entrance middle and late stage, has just had complete to fracture development and the distribution situation of this reservoir
Whole, comprehensively recognize, affect Development allocation, affect oil gas field entirety recovery ratio.
Summary of the invention
It is an object of the invention to provide three-dimensional cracking modeling method, to solve in prior art acquired by the prospect pit stage
Reservoir Fracture evaluate data and be difficult to problem complete, sufficient, it is achieved completely, accurately to whole preserve in early days in exploitation
Slabbing seam is modeled the purpose analyzed.
The present invention is achieved through the following technical solutions:
Three-dimensional cracking modeling method, the method comprises the following steps: (a) in a certain oil-gas exploration and development block, according to geology
Condition and goal in research demand, choose the well with symbolical meanings, and full well section is carried out resistivity logging, acoustic logging, nature
Potential logging, gamma ray log, compensated neutron log, density log, calliper log, obtain the above-mentioned survey of target well full well section
Well curve, makes well log interpretation, and listing all slits can developable well section；B () crack to judging in step (a) may
Grow well section and carry out imaging logging, explain Image Logging Data, get rid of aplasia crack well section, retain fracture development well section；(c)
Focus is set in turn in all slits retained in step (b) and grows well section, carry out VSP well logging one by one, make VSP well logging
Explain, draw the data of each well section development degree of micro cracks in oil；D () all slits to being retained in step (b) is grown well section and is carried out
Sidewall coring operation, and all rock cores taken out are carried out electron-microscope scanning observation, porosity determination, rock strain experiment；E () depends on
According to above-mentioned well logging and experimental data, modeling software is used to set up the fracture development model of individual well section；(f) by described step (a) ~
E () N mouth well in same oil-gas exploration and development block, is established as Reservoir Lithofacies three-dimensional cracking by N number of individual well section model
Development model, wherein, N is the positive integer more than or equal to 2.
For in prior art acquired by the prospect pit stage Reservoir Fracture evaluate data be difficult to complete, sufficiently ask
Topic, the present invention proposes three-dimensional cracking modeling method, and first the well location chosen often is implemented in prospect pit drilling process by the method
Rule well logging, well logging project includes but not limited to resistivity, sound wave, natural potential, natural gamma, compensated neutron, density, hole diameter,
Obtain the above-mentioned log of full well section, and utilize conventional geology means, from above-mentioned well log interpretation, find instruction fracture development
Feature, such as: deep lateral resistivity is significantly greater than shallow lateral resistivity, induction motor is significantly greater than lateral resistivity, nature
Gamma curve increases extremely, resistivity curve occurs that the change of ANOMALOUS VARIATIONS even zigzag, spontaneous potential curve and hole diameter are equal
Abnormal etc., thus list all slits can developable well section.Afterwards listed crack can developable well section be carried out
Imaging logging.As identifying crack effective logging mode the most directly perceived, individually carrying out an imaging logging operation is that have very much must
Want, because Image Logging Data can highlight the rock acoustic impedance and the variation characteristic of resistivity caused because of crack change,
Reduce the non-crack response impact caused by anthropic factors such as drilling engineerings, thus revise the error of Conventional Logs so that
Those skilled in the art can get rid of aplasia crack well section further, retains fracture development well section.For the judgement that maintain
For the well section of fracture development, by entering each well section degree of depth under focus, carry out VSP well logging.VSP logs well, i.e. vertical seismic profile log,
Fracture intensity is judged by the reflectance signature difference of seismic wave.VSP well logging can above-mentioned crack judge on the basis of,
Strong and weak feature by echo draws the degree of fracture development, enables research worker to have the development degree of formation fracture quantitatively
Understanding.Meanwhile, then the well section being fracture development to the judgement that maintain carries out sidewall coring, and enters all rock cores taken out
The observation of row electron-microscope scanning, porosity determination, rock strain experiment, it is thus achieved that rock core high-definition picture, porosity and connectivity data,
The significant datas such as stress-strain diagram.According to above-mentioned all data, modeling software is used to set up the fracture development mould of individual well section
Type, by being arranged in the individual well model of the N mouth prospect pit in each important orientation of trap, then the three-dimensional cracking that can obtain reservoir overall is sent out
Educate model.Wherein N value is determined by trap size, scale, form and make, at least should ensure that each critical boundaries of trap
Place and the Yue kou of each high point.Hereby it is achieved that developing the most completely, facilitating, accurately whole Reservoirs entered
The purpose of row modeling analysis.Additionally, in modeling method of the present invention, owing to only the well section listed in step (a) being carried out
Imaging logging, only well section listed in step (b) is carried out VSP well logging and sidewall coring, greatly reduce prospect pit construction
Cost and the duration, the risk that drilling engineering accident occurs can also be reduced simultaneously, also have the heaviest for drilling engineering
The meaning wanted.
Further, the imaging logging described in step (b) is micro-resisitivity image (FMI or EMI).
Further, step (c) and step (d) are the most adjustable.
Further, the rock strain experiment described in step (d) is tested for triaxial stress rock strain.Compared to routine
Simple stress rock strain experiment, use triaxial stress rock strain experiment can the feelings of simulated ground stress effect the most accurately
Condition, makes experiment be closer to underground practical situation, it is simple to obtain experimental data more accurately.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, three-dimensional cracking modeling method of the present invention, by carrying out conventional logging, imaging logging successively, gets rid of aplasia crack well
Section, retains fracture development well section, then the well section retained is carried out VSP well logging, sidewall coring, institute's coring is carried out Electronic Speculum and sweeps
Retouch observation, porosity determination, rock strain experiment, in conjunction with well log interpretation, use modeling software to set up the crack of individual well section
Development model；Stratum three-dimensional cracking development model is set up again by many mouthfuls of individual well models in same block.
2, three-dimensional cracking modeling method of the present invention, only to through screening part well section carry out imaging logging, VSP well logging with
Sidewall coring operation, greatly reduces cost and the duration of prospect pit construction, can also reduce simultaneously and drilling engineering accident occurs
Risk, has for drilling engineering and is of great significance.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the schematic process flow diagram of one specific embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1:
Three-dimensional cracking modeling method as shown in Figure 1, the method comprises the following steps: (a) is at a certain oil-gas exploration and development block
In, according to geological conditions and goal in research demand, choose the well with symbolical meanings, full well section is carried out resistivity logging, sound
Ripple well logging, nutural potential logging, gamma ray log, compensated neutron log, density log, calliper log, obtain target well complete
The above-mentioned log of well section, makes well log interpretation, and listing all slits can developable well section；B () judges in step (a)
The crack gone out may be grown well section and be carried out micro-resisitivity image, explains Image Logging Data, gets rid of aplasia crack
Well section, retains fracture development well section；C focus is set in turn in all slits retained in step (b) and grows well section by (), by
One carries out VSP well logging, makes VSP well log interpretation, draws the data of each well section development degree of micro cracks in oil；D () is protected in step (b)
The all slits stayed is grown well section and is carried out sidewall coring operation, and all rock cores taken out are carried out electron-microscope scanning observation, hole
Degree measures, the experiment of triaxial stress rock strain；E (), according to above-mentioned well logging and experimental data, uses modeling software to set up individual well and cuts open
The fracture development model in face；F described step (a) ~ (e) is used for the N mouth well in same oil-gas exploration and development block by (), by N number of
Individual well section model is established as Reservoir Lithofacies three-dimensional cracking development model.Wherein N value is by trap size, scale, form and structure
Mode determines, to ensure having at each critical boundaries of trap and based on the Yue kou of each high point.
During the present embodiment uses, first the well location chosen is implemented conventional logging, well logging in prospect pit drilling process
Project includes but not limited to resistivity, sound wave, natural potential, natural gamma, compensated neutron, density, hole diameter, obtains full well section
Above-mentioned log, and utilize conventional geology means, from above-mentioned well log interpretation, find the feature of instruction fracture development.The most right
Listed crack developable well section can carry out imaging logging, thus revises the error of Conventional Logs so that this area
Technical staff can get rid of aplasia crack well section further, retains fracture development well section.It is crack for the judgement that maintain
The well section grown, by entering each well section degree of depth under focus, carries out VSP well logging.The basis that VSP well logging can judge in above-mentioned crack
On, the strong and weak feature of echo draw the degree of fracture development, enable research worker that the development degree of formation fracture to be had
Quantitative understanding.Meanwhile, then the well section being fracture development to the judgement that maintain carries out sidewall coring, and to all rocks taken out
The heart carries out electron-microscope scanning observation, porosity determination, rock strain experiment, it is thus achieved that rock core high-definition picture, porosity and connectivity
The significant data such as data, stress-strain diagram.According to above-mentioned all data, the crack using modeling software to set up individual well section is sent out
Educate model, by being arranged in the individual well model of the many mouthfuls of prospect pits in each important orientation of trap, then can obtain the three-dimensional that reservoir is overall
Fracture development model.
Upper described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in
Within protection scope of the present invention.
Claims (4)
1. three-dimensional cracking modeling method, it is characterised in that the method comprises the following steps:
A (), in a certain oil-gas exploration and development block, according to geological conditions and goal in research demand, is chosen and is had symbolical meanings
Well, carries out resistivity logging, acoustic logging, nutural potential logging, gamma ray log, compensated neutron log, close to full well section
Degree well logging, calliper log, obtain the above-mentioned log of target well full well section, make well log interpretation, and listing all slits may
The well section grown；
B () crack to judging in step (a) may be grown well section and be carried out imaging logging, explain Image Logging Data, get rid of
Aplasia crack well section, retains fracture development well section；
C focus is set in turn in all slits retained in step (b) and grows well section by (), carry out VSP well logging one by one, make
VSP well log interpretation, draws the data of each well section development degree of micro cracks in oil；
D () all slits to being retained in step (b) is grown well section and is carried out sidewall coring operation, and to all rock cores taken out
Carry out electron-microscope scanning observation, porosity determination, rock strain experiment；
E (), according to above-mentioned well logging and experimental data, uses modeling software to set up the fracture development model of individual well section；
F described step (a) ~ (e) is used for the N mouth well in same oil-gas exploration and development block by (), built by N number of individual well section model
Standing as Reservoir Lithofacies three-dimensional cracking development model, wherein, N is the positive integer more than or equal to 2.
Three-dimensional cracking modeling method the most according to claim 1, it is characterised in that: the imaging logging described in step (b)
For micro-resisitivity image (FMI or EMI).
Three-dimensional cracking modeling method the most according to claim 1 and 2, it is characterised in that: step (c) and step (d) are sequentially
Adjustable.
Three-dimensional cracking modeling method the most according to claim 1 and 2, it is characterised in that: the rock described in step (d) should
Become experiment to test into triaxial stress rock strain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152171.5A CN105840175A (en) | 2016-03-17 | 2016-03-17 | Three-dimensional fracture modeling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610152171.5A CN105840175A (en) | 2016-03-17 | 2016-03-17 | Three-dimensional fracture modeling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105787803A (en) * | 2016-03-17 | 2016-07-20 | 成都创源油气技术开发有限公司 | Shale gas reservoir three-dimensional geologic modeling method |
| CN109425912A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of recognition methods of Carbonate Reservoir reservoir effective fracture |
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|---|---|---|---|---|
| SU827761A1 (en) * | 1976-06-16 | 1981-05-07 | Северо-Кавказский Государственный Научно- Исследовательский И Проектный Институтнефтяной Промышленности | Method of making the sections of fissured medium simulator |
| US20140372089A1 (en) * | 2011-11-04 | 2014-12-18 | Schlumberger Technology Corporation | Method of calibrating fracture geometry to microseismic events |
| CN104977618A (en) * | 2014-04-09 | 2015-10-14 | 中国石油集团东方地球物理勘探有限责任公司 | Method for evaluating shale gas reservoir and finding dessert area |
| CN105317435A (en) * | 2015-10-30 | 2016-02-10 | 中国石油大学(北京) | Horizontal well crack recognition method |
-
2016
- 2016-03-17 CN CN201610152171.5A patent/CN105840175A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU827761A1 (en) * | 1976-06-16 | 1981-05-07 | Северо-Кавказский Государственный Научно- Исследовательский И Проектный Институтнефтяной Промышленности | Method of making the sections of fissured medium simulator |
| US20140372089A1 (en) * | 2011-11-04 | 2014-12-18 | Schlumberger Technology Corporation | Method of calibrating fracture geometry to microseismic events |
| CN104977618A (en) * | 2014-04-09 | 2015-10-14 | 中国石油集团东方地球物理勘探有限责任公司 | Method for evaluating shale gas reservoir and finding dessert area |
| CN105317435A (en) * | 2015-10-30 | 2016-02-10 | 中国石油大学(北京) | Horizontal well crack recognition method |
Non-Patent Citations (1)
| Title |
|---|
| 张岚等: "渤海湾盆地锦州南油田太古界变质岩潜山储层裂缝三维地质建模", 《油气地质与采收率》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105787803A (en) * | 2016-03-17 | 2016-07-20 | 成都创源油气技术开发有限公司 | Shale gas reservoir three-dimensional geologic modeling method |
| CN109425912A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of recognition methods of Carbonate Reservoir reservoir effective fracture |
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Application publication date: 20160810 |