CN201915952U - Prediction apparatus for reservoir burial reservation degree of karst cave - Google Patents
Prediction apparatus for reservoir burial reservation degree of karst cave Download PDFInfo
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- CN201915952U CN201915952U CN2010202594054U CN201020259405U CN201915952U CN 201915952 U CN201915952 U CN 201915952U CN 2010202594054 U CN2010202594054 U CN 2010202594054U CN 201020259405 U CN201020259405 U CN 201020259405U CN 201915952 U CN201915952 U CN 201915952U
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Abstract
The utility model provides a prediction apparatus for reservoir burial reservation degree of a karst cave, which comprises a relationship building unit, a chart building unit and a prediction unit, wherein the relationship building unit is used for building the mathematical relationship of the cave collapse initial depth of the ratio between the burial reservation depth corresponding to different caves and the thickness of a top plate of the cave together with the section size of the cave according to the section form factor of different caves and bending strength factor of a surrounding rock: H=45*k*R*(h/L)2; the chart building unit is used for building cave collapse reservation depth charts corresponding to different caves according to the mathematical relationship of the cave collapse initial depth corresponding to different caves; and the prediction unit is used for predicting the reservoir burial reservation degree of the cave according to the cave collapse reservation depth charts corresponding to different caves and actual measured thickness of the top plate of the cave as well as the section size of the cave. The apparatus provides a new, quantitative and effective technical means for prediction and evaluation of the carbonatite karst cave reservoir.
Description
Technical field
The utility model relates to the reservoir prediction field of petroleum geology exploration, is specifically related to a kind of karst cave reservoir and buries the prediction unit of preservation degree.
Background technology
The carbonate rock cave that the hypergene karst causes is the important goal of oil-gas exploration.And the mechanics unstability may take place and collapses in the large scale cave that the face of land forms in the process that buried depth, load increase, and the cave is by the filling of country rock dust, and overlying rock downward compacting in cave causes reservoir space partly or entirely to lose.
Can prediction cave type reservoir under effectively preserving under the present buried depth of oil-gas bearing basin, the exploration of carbonate rock deep layer is significant for expanding, and will address this problem, key is to set up a kind of quantitative approach to judge accurately whether pressurized collapses in the karst cave.
Karst cave reservoir is preserved problem through exploring for many years, and means such as core description, drilling well emptying and imaging logging are used by exploration geology man for many years, and whether description that can be more careful form, formation and the judgement in the karst cave of drilling well collapses.And, lack effective Forecasting Methodology for wide not drilling area.
The inventor finds in realizing process of the present utility model, last century the nineties, texas,U.S economic geology office carbonate reservoir sign laboratory is that 5000 feet (about 1500 meters) are to 9000 feet (about 2700 meters) by the approximate depth compass that American-European oil gas field and open-air a large amount of statistics of appearing have drawn the cave preservation, the understanding of this statistical method and gained thereof is extensively quoted, and this statistical method solves the cave in the problem of burying the preservation degree of depth under the load from principle, be difficult to directly be generalized to other area of different geological conditionss, and the many karst of above limit depth data and China cave reservoir can be saved to the following true contradiction of 5000m.Over nearly 10 years, the geophysics technology is successfully applied to carbonate rock seam hole engraving, can discern cavern location more exactly, and calculate the scale size in cave by correcting plate, but, can't directly declare effectively and know the cave and whether collapse or preserve because the multi-solution and the seismic resolution of geophysical information be difficult to increase substantially.
The basic way that reservoir preservation problem in karst cave solves need be based upon the basis of rock mechanics principle.The rock mechanics principle mainly concentrates on artificial pit stability mechanics quantitative analyses such as colliery in the application achievements of association area, and it is not strong to analyze applicability at the technological means in artificial pit for the complicated natural karst of the oil gas field cave of burying temperature and pressure state, rock stratum diagenesis degree of consolidation difference, underground water support.
Recent studies show that the flexural strength coefficient is to be suitable for expressing the karst cave in numerous mechanics parameters most to bury the rock mechanics parameter of the stress that collapses under the load.The flexural strength formula is in conjunction with geological conditionss such as the diagenesis degree of consolidation and underground fluid supports, derives cave, the square-section theoretical formula H that collapses
Collapse Collapse≈ 45 * R * (h/L)
2, can simplify and disclose the karst cave and burying the major control factor that collapses under the load and quantitative relationship each other thereof.These work provide new thinking for quantitative forecast karst cave reservoir buries the preservation degree.
The utility model content
The utility model provides a kind of karst cave reservoir to bury the prediction unit of preservation degree, and this device can bury the preservation degree at no drilling area prediction before drilling karst cave reservoir, to improve the exploration success rate.
Above-mentioned purpose of the present utility model is achieved by the following technical solution:
A kind of karst cave reservoir buries the prediction unit of preservation degree, described device comprises: relation is set up the unit, be used for setting up burying of corresponding different caves and preserve collapse ID mathematical relationship: H=45 * k * R * (h/L) of the degree of depth and, the cave between the ratio of cave top plate thickness and cave cross section scale according to the cross sectional shape coefficient in different caves and country rock flexural strength coefficient
2, wherein, k is a cave cross sectional shape coefficient, and R is a country rock flexural strength coefficient, and H preserves the limit depth or the degree of depth that initially collapses for burying, and h is the cave top plate thickness, L is the cave cross section scale; Plate is set up the unit, is used for according to the cave that described relation is set up the corresponding different caves of setting up the unit ID mathematical relationship that collapses, and collapses and preserve degree of depth plate in the cave of setting up corresponding different caves; Predicting unit is used for setting up the cave of setting up the unit according to described plate and collapses and preserve cave top plate thickness, the cave cross section scale of degree of depth plate and actual measurement, predicts that the reservoir in described cave buries the preservation degree.
Device of the present utility model provides new, quantitative, effective technical means for the hole type Reservoir Prediction evaluation of carbonate rock karst seam.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute qualification of the present utility model.In the accompanying drawings:
Fig. 1 is for to carry out the forecast method flow chart that karst cave reservoir buries the preservation degree according to the utility model;
Fig. 2 buries stressed schematic diagram for the karst cave of the utility model embodiment;
Fig. 3 collapses ID mathematical relationship flow chart for correction cave among the embodiment shown in Figure 1;
Fig. 4 is for predicting the flow chart whether drilling area cave is not preserved or collapsed according to the utility model;
Fig. 5 preserves degree of depth plate schematic diagram for the limestone of the utility model embodiment like collapsing of circular cave;
Fig. 6 is for predicting the flow chart of the degree of depth that initially collapses in the cave of having collapsed according to the utility model;
Fig. 7 buries the prediction unit composition frame chart of preservation degree for karst of the present utility model cave reservoir.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment is clearer, below in conjunction with embodiment and accompanying drawing, embodiment is described in further details to the utility model.At this, illustrative examples of the present utility model and explanation thereof are used to explain the utility model, but not as to qualification of the present utility model.
Fig. 1 please refer to Fig. 1 for the device that utilizes the utility model embodiment and provide carries out the forecast method flow chart that karst cave reservoir buries the preservation degree, and this method comprises:
Step 101: according to the cross sectional shape coefficient in different caves and country rock flexural strength coefficient set up burying of corresponding different caves preserve the degree of depth with, collapse the ID mathematical relationship in the cave between the ratio of cave top plate thickness and cave cross section scale;
Wherein, this mathematical relationship can be represented by following formula:
H=45 * k * R * (h/L)
2, wherein, k is a cave cross sectional shape coefficient, and R is a country rock flexural strength coefficient, and H preserves the limit depth or the degree of depth that initially collapses for burying, and h is the cave top plate thickness, L is the cave cross section scale.
Studies show that the flexural strength coefficient is to be suitable for expressing the karst cave in numerous mechanics parameters most to bury the rock mechanics parameter of the stress that collapses under the load.The flexural strength formula
In conjunction with geological conditionss such as the diagenesis degree of consolidation and underground fluid supports, derive cave, the square-section theoretical formula H that collapses
Can simplify and disclose the karst cave and burying the major control factor that collapses under the load and quantitative relationship each other thereof.These work provide new thinking for quantitative forecast karst cave reservoir buries the preservation degree.Derivation is as follows:
If adopt international standards the unit, F is a load, and L is a span, and b is a width, and h is a thickness, then:
The measurement unit of F is newton; The measurement unit of R is Pascal's (Newton/meter
2); The unit of g is newton/kilogram; The unit of L, b, h is a rice; The unit of ρ is kg/m
3
Because ρ
Rock≈ 2500kg t/m
3, ρ
Water≈ 1000kg/m
3, rock flexural strength coefficient is
Then:
F＝Δρ×g×V＝Δρ×g?×H×b×L
Underground water has been born and has partly been buried load, so Δ ρ=ρ
Rock-ρ
Water
Therefore, H=(2 * R * h * h)/(3 * Δ ρ * g * L * L)
On the basis of aforementioned derivation, change conventional unit into, then:
The measurement unit of R is a MPa, and the measurement unit of H, h, L is m, ρ
Rock≈ 2.5t/m3, ρ
Water≈ 1t/m3,
Wherein, the top shape in cave is not the flat board of materials mechanics experimental, and a diversity factor is arranged between different cavernous shape stresses and the square hole.Please refer to Fig. 2.With cave, the square-section depth theory formula that collapses
Be the basis, cross section, square cave with simplification is a radix 1, and according to the mechanical calculation section factor, coefficient 1.57 is got in cross section, for example circular cave to regular cavernous shape, positive equilateral triangle gets 2, takes rock sample physical analogy estimation section factor for irregular cavernous shape.Bury the ID mathematical formulae that collapses in the cave arbitrarily: H=45 * k * R * (h/L)
2
As from the foregoing, the quantitative relationship formula of the cross section scale in the degree of depth that initially collapses and cave country rock flexural strength coefficient, cave top plate thickness, overburden density, cave, 4 parameters in back can be by experiment, prospect pit, geophysical information are obtained.
For example, bury the drafting of the preservation degree of depth with limestone like circular cave and quantitatively get coefficient 1.57 in calculating plate (the geology true form that meets most of karst cave like cross section, circular cave more) cross section, circular cave, limestone flexural strength coefficients R is averaged 5 MPas according to mechanical test, and above-mentioned simplified formula is: H=353 * (h/L)
2Please refer to Fig. 5.
In the present embodiment, if the country rock in cave meets with external stress, for example lateral compression stress or tensile stress are then in the method for present embodiment, before step 102, also will be according to the described cave of the external stress modifier of the country rock in the different caves ID mathematical relationship that collapses.
Wherein, the method for correction can realize by step embodiment illustrated in fig. 3, comprising:
Step 301: obtain the external stress of country rock;
Wherein, can obtain the external stress of country rock by geophysical method or rock sample measurement method, present embodiment not with this as restriction.
Step 302:, calculate the flexural strength coefficient under the external stress of described country rock according to the proportionate relationship between compressive strength and the flexural strength;
Step 303: according to the ID mathematical relationship that collapses of the described cave of flexural strength coefficient correction under the external stress of described country rock.
Wherein, on the basis of step 101, suppose in certain geology period of history of burying 3000 meters degree of depth, the rock stratum is subjected to the lateral compression stress that intensity is 36 MPas (concrete stress data, can obtaining by actual rock mechanics acoustic-emission test of rock sample arranged, the earthquake sonimetry that passes through of no rock sample obtains), (obtain according to the proportionate relationship between compressive strength of rock and the flexural strength by rock mechanics experiment, suppose herein rock flexural strength average out to compressive strength 1/18th), the flexural strength that is equivalent to rock has reduced by 2 MPas, and promptly this degree of depth is changed to another H=212 * (h/L) on deflection right side with sub-surface (the comprising the cave country rock) depth curve that collapses
2, to be that the cave is easier under the lateral compression situation collapse the tracing geological meaning that please refer to Fig. 5 (degree of depth that initially collapses shoals or normally buries the cave of not collapsing and is extruded and collapses).Tensile stress condition cave preservation degree of depth plate principle and method and extrusion stress are similar.
According to method shown in Figure 3, run in the cave under the situation of external stress, revised cave that step 101 the sets up ID mathematical relationship that collapses, can collapse by the revised cave that step 102 is set up corresponding different caves and preserve degree of depth plate.
Step 102: initially collapse and preserve degree of depth plate according to collapse cave that the ID mathematical relationship sets up corresponding different caves, the cave in the different caves of described correspondence;
Step 103: predict that according to described cave cave top plate thickness, the cave cross section scale of preserving degree of depth plate and actual measurement that initially collapse the reservoir in described cave buries the preservation degree.
Wherein, can verify the plate of being set up with the real brill data in a large amount of caves, the error identifying source is revised this plate, for example the mechanics parameter R of the difference of cave cross sectional shape, cave country rock changes under the temperature and pressure etc. burying, so that utilize more accurate plate to predict that the reservoir in cave buries the preservation degree.
In the present embodiment, can collapse according to the cave that step 102 is set up and preserve degree of depth plate, adopt the cultellation method, whether this does not preserve or collapses in the cave in drilling well area corresponding to the position judgment of the line both sides of initially collapsing according to the real data point in drilling well area not.Please refer to Fig. 5, real data cultellation be partial to initially the to collapse cave reservoir preservation degree of line upper right side strengthens, and the real data cultellation cave reservoir of the line lower-left side destructiveness that collapses of being partial to initially to collapse strengthens.
Please refer to Fig. 4, this method comprises:
Step 401: obtain not the cave top plate thickness and the cave cross section scale in drilling area cave;
Wherein, can obtain not the cave top plate thickness and the cave cross section scale in drilling area cave according to the geophysical information analysis, present embodiment not with this as restriction.
Step 402: according to the cave top plate thickness in described not drilling area cave and the ratio of cave cross section scale, and the cave in the corresponding described not drilling area cave of preserving collapses and preserves degree of depth plate, adopts the cultellation method to predict whether described not drilling area cave is preserved or collapsed.
For example, the collapse two-dimensional curve plate of ID of the cave of the correction of drawing according to step 102 please refer to Fig. 5, and longitudinal axis is a buried depth (unit: rice); Lateral shaft is the ratio of cave top plate thickness (cave is apart from weathering exposure distance) and cave cross section scale; Black lines is that the theoretical curve that initially collapses is buried in the cave; Declare the knowledge lower left and be the district of collapsing, the upper right side is the district of not collapsing.Can draw out the prediction plate of multiple correspondence equally for different lithology condition, cave cross sectional shape, to adapt to complicated karst cave geology actual state.
In the present embodiment, also can collapse and preserve degree of depth plate, adopt leads method, bury the evolution history according to this cave of having collapsed the cave of real data point prediction in the cave of collapsing according to the cave that step 102 is set up.
Please refer to Fig. 6, this method comprises:
Step 601: the cave top plate thickness in the cave of having collapsed and cave cross section scale;
Wherein, can obtain the cave top plate thickness and the cave cross section scale in the cave of collapsing according to boring well logging and well-log information, present embodiment not with this as restriction.
Step 602: according to the cave top plate thickness in the described cave of having collapsed and the ratio of cave cross section scale, and the corresponding described cave of having collapsed the cave of preserving collapses and preserves degree of depth plate, adopts leads method to predict the degree of depth that initially collapses in the described cave of having collapsed.
For example, the cave of collapsing that drilling well is disclosed apart from the ratio h/L cultellation of exposure distance and cave cross section scale in above-mentioned plate, please refer to Fig. 5, this cultellation vertical leads is upwards intersected with the line that initially collapses, horizontal lead wire and buried depth coordinate axes intersect left from intersection point again, the intersection point degree of depth is this cave degree of depth that initially collapses, and can review the cave more accurately according to this degree of depth geologic age and bury the evolution history.
In the present embodiment, can also collapse according to the cave that step 102 is set up and preserve degree of depth plate, the tension fissure that collapses be buried in the cave of non-structure external force predict.
For example, for the real data point near the line that initially collapses, measurablely bury the avalanche tension fissure (crack that non-structure external force causes) that stressed unstability causes by the cave, the matrix pores that the cave country rock is linked up in this type of crack can form the high-quality reservoir bodies.
A kind of karst cave reservoir that Fig. 7 provides for the utility model embodiment buries the composition frame chart of the prediction unit of preservation degree, please refer to Fig. 7, and this device comprises:
Relation is set up unit 71, be used for setting up burying of corresponding different caves and preserve collapse ID mathematical relationship: H=45 * k * R * (h/L) of the degree of depth and, the cave between the ratio of cave top plate thickness and cave cross section scale according to the cross sectional shape coefficient in different caves and country rock flexural strength coefficient
2, wherein, k is a cave cross sectional shape coefficient, and R is a country rock flexural strength coefficient, and H preserves the limit depth or the degree of depth that initially collapses for burying, and h is the cave top plate thickness, L is the cave cross section scale;
Plate is set up unit 72, is used for according to the cave that relation is set up the corresponding different caves of the setting up unit 71 ID mathematical relationship that collapses, and collapses and preserve degree of depth plate in the cave of setting up corresponding different caves;
Predicting unit 73 is used for setting up unit 72 according to plate and sets up the cave and collapse and preserve cave top plate thickness, the cave cross section scale of degree of depth plate and actual measurement, predicts that the reservoir in described cave buries the preservation degree.
In one embodiment, this device also comprises:
Amending unit 74, be used for setting up the cave of the setting up unit 71 ID mathematical relationship that collapses according to the external stress modifier of the country rock in different caves relation, so that plate is set up unit 72 according to the amended cave ID mathematical relationship that collapses, collapse and preserve degree of depth plate in the cave of setting up corresponding different caves.
Wherein, this amending unit 74 can comprise:
External stress acquisition module 741 is used to obtain the external stress of country rock, and the external stress of described country rock comprises lateral compression stress or tensile stress;
Computing module 742 is used for according to the proportionate relationship between compressive strength and the flexural strength, calculates the flexural strength coefficient under the external stress of country rock that external stress acquisition module 741 obtains;
Correcting module 743 is used for calculating the described cave of flexural strength coefficient correction under the external stress of country rock that the obtains ID mathematical relationship that collapses according to computing module 742.
In one embodiment, predicting unit 73 comprises:
Field data point acquisition module 731 is used to obtain drilling area cave not or the cave top plate thickness and the cave cross section scale in the cave, district of having collapsed;
Cultellation module 732, be used for the cave top plate thickness in the not drilling area cave that gets access to according to field data point acquisition module 731 and the ratio of cave cross section scale, whether and the cave in corresponding described not drilling area cave collapses and preserves degree of depth plate, adopt the described not drilling area of cultellation method prediction cave to preserve or collapse.
In another embodiment, predicting unit 73 also comprises:
Leadthrough module 733, be used for the cave top plate thickness in the cave of collapsing that gets access to according to field data point acquisition module 731 and the ratio of cave cross section scale, and corresponding described cave of having collapsed the cave collapses and preserves degree of depth plate, adopts the degree of depth that initially collapses in the described cave of having collapsed of leads method prediction.
Each ingredient of the device of present embodiment is respectively applied for each step of the method that realizes previous embodiment, because in the aforementioned embodiment, each step is had been described in detail, and does not repeat them here.
Use the utility model, geology combines with geophysics that (geology provides and exposes surface layer position and lithology mechanics parameter, earthquake provides cave size and and exposure distance), can before brill, declare and know the cave and whether collapse, and evaluation and cave relevant effective reservoir space preservation (or loss) degree of degree that collapses.For the cave of collapsing of drilling well, can declare and know its buried depth and begin to collapse to what degree of depth (and then tracing back to what age), cave evolution history is accurately recovered.Near avalanche tension fissure (crack that non-structure external force causes) the measurable line that initially collapses, the matrix pores that the cave country rock is linked up in this type of crack can form the high-quality reservoir bodies.Proof dolomite cave is because its country rock flexural strength coefficient height (R
Dolomite≈ 1.7 * R
Limestone), comparing burying of limestone cave, to preserve the degree of depth bigger.Negated the understanding that limit depth is preserved in the cave that draws by statistics of forefathers, proof carbonate rock cave (country rock flexural strength coefficient height, cave cross section scale are medium and small, cave bigger etc.) under the suitable parameters condition apart from the exposure distance, its reservoir space can be saved to the following even bigger degree of depth of 5000～ten thousand metres, provides scientific basis for opening up buried Tibetan carbonate rock petroleum exploration domain.The utility model provides new, quantitative, effective technical means for the hole type Reservoir Prediction evaluation of carbonate rock karst seam.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is a specific embodiment of the utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a karst cave reservoir buries the prediction unit of preservation degree, it is characterized in that described device comprises:
Relation is set up the unit, be used for setting up burying of corresponding different caves and preserve collapse ID mathematical relationship: H=45 * k * R * (h/L) of the degree of depth and, the cave between the ratio of cave top plate thickness and cave cross section scale according to the cross sectional shape coefficient in different caves and country rock flexural strength coefficient
2, wherein, k is a cave cross sectional shape coefficient, and R is a country rock flexural strength coefficient, and H preserves the limit depth or the degree of depth that initially collapses for burying, and h is the cave top plate thickness, L is the cave cross section scale;
Plate is set up the unit, is used for according to the cave that described relation is set up the corresponding different caves of setting up the unit ID mathematical relationship that collapses, and collapses and preserve degree of depth plate in the cave of setting up corresponding different caves;
Predicting unit is used for collapsing according to the cave that described plate is set up the corresponding different caves of setting up the unit and preserves cave top plate thickness, the cave cross section scale of degree of depth plate and actual measurement, predicts that the reservoir in described cave buries the preservation degree.
2. device according to claim 1 is characterized in that, described device also comprises:
Amending unit, be used for setting up the cave of setting up the unit ID mathematical relationship that collapses according to the described relation of the external stress modifier of the country rock in different caves, so that described plate is set up the unit according to the amended cave ID mathematical relationship that collapses, collapse and preserve degree of depth plate in the cave of setting up corresponding different caves.
3. device according to claim 2 is characterized in that, described amending unit comprises:
External stress acquisition module is used to obtain the external stress of country rock, and the external stress of described country rock comprises lateral compression stress or tensile stress;
Computing module is used for according to the proportionate relationship between compressive strength and the flexural strength, calculates the flexural strength coefficient under the external stress of country rock that described external stress acquisition module obtains;
Correcting module is used for calculating flexural strength coefficient under the external stress of described country rock that obtains according to described computing module, revises the described cave ID mathematical relationship that collapses.
4. device according to claim 3 is characterized in that, described external stress acquisition module specifically is used to obtain lateral compression stress or tensile stress.
5. device according to claim 1 and 2 is characterized in that, described predicting unit comprises:
Field data point acquisition module is used to obtain drilling area cave not or the cave top plate thickness and the cave cross section scale in the cave, district of having collapsed;
The cultellation module, be used for the cave top plate thickness in the described not drilling area cave that obtains according to described field data point acquisition module and the ratio of cave cross section scale, whether and the cave in corresponding described not drilling area cave collapses and preserves degree of depth plate, adopt the described not drilling area of cultellation method prediction cave to preserve or collapse.
6. device according to claim 5 is characterized in that, described predicting unit also comprises:
Leadthrough module, be used for the cave top plate thickness in the described cave of having collapsed that obtains according to described field data point acquisition module and the ratio of cave cross section scale, and corresponding described cave of having collapsed the cave collapses and preserves degree of depth plate, adopts the degree of depth that initially collapses in the described cave of having collapsed of leads method prediction.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634295A (en) * | 2015-02-10 | 2015-05-20 | 西南石油大学 | Carbonate rocks cave-type reservoir active volume estimation method |
| CN106285657A (en) * | 2015-06-10 | 2017-01-04 | 中国石油化工股份有限公司 | For determining that fracture-pore reservoir solution cavity caves in the method and system of event |
-
2010
- 2010-07-07 CN CN2010202594054U patent/CN201915952U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634295A (en) * | 2015-02-10 | 2015-05-20 | 西南石油大学 | Carbonate rocks cave-type reservoir active volume estimation method |
| CN104634295B (en) * | 2015-02-10 | 2017-08-25 | 西南石油大学 | Carbonate rock cave type reservoir effective volume evaluation method |
| CN106285657A (en) * | 2015-06-10 | 2017-01-04 | 中国石油化工股份有限公司 | For determining that fracture-pore reservoir solution cavity caves in the method and system of event |
| CN106285657B (en) * | 2015-06-10 | 2019-05-07 | 中国石油化工股份有限公司 | For determining that the method and system of collapsing event occur for fracture-pore reservoir solution cavity |
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