CN115614025A - Device and method for measuring deflection angle of rock interface of transition facies of crack crossing sea and land - Google Patents
Device and method for measuring deflection angle of rock interface of transition facies of crack crossing sea and land Download PDFInfo
- Publication number
- CN115614025A CN115614025A CN202211294003.1A CN202211294003A CN115614025A CN 115614025 A CN115614025 A CN 115614025A CN 202211294003 A CN202211294003 A CN 202211294003A CN 115614025 A CN115614025 A CN 115614025A
- Authority
- CN
- China
- Prior art keywords
- rock
- rock plate
- confining pressure
- multilayer
- fracturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000007704 transition Effects 0.000 title claims abstract description 23
- 208000035126 Facies Diseases 0.000 title description 7
- 230000008569 process Effects 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000010586 diagram Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 29
- 238000011160 research Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000021185 dessert Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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
- E21B47/02—Determining slope or direction
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device and a method for measuring a rock interface deflection angle of a transition phase of a crack crossing sea and land, wherein the device comprises a fracturing fluid preparation storage tank, a screw pump, a fracturing pipeline and a multilayer superposed rock plate model device; the multilayer superposed rock plate model device comprises a rock core chamber, a confining pressure pipeline and a confining pressure pump capable of changing confining pressure above and below the rock core chamber; the confining pressure pump is communicated with the upper end and the lower end of the core chamber through confining pressure pipelines; placing a multilayer superposed rock plate model in the rock core chamber, wherein a simulated horizontal well shaft with a perforation is arranged in the multilayer superposed rock plate model; and the fracturing fluid preparation storage tank, the screw pump and the simulated horizontal well shaft of the multilayer superposed rock plate model device are communicated in sequence through a fracturing pipeline. The method can simulate the hydraulic fracturing process of the multilayer superposed reservoirs in the actual stratum environment; the deflection angle between multiple lithologies when the hydraulic fracture extends to the lithology interface can be accurately measured; the process of the simulation experiment is reasonably controlled by monitoring through a computer.
Description
Technical Field
The invention relates to a device and a method for measuring a rock interface deflection angle of a transition phase of a crack crossing sea and land, and belongs to the technical field of unconventional oil and gas development and research.
Background
Along with the deep exploration and development of oil and gas, unconventional oil and gas gradually become the key point of research at present. China is rich in sea-land transition phase shale gas resources, and the amount of resources predicted by different research institutions in China reaches 2.4-7.4 trillion square, so that the method is an important exploration and succession field following sea-phase shale gas. However, the geological characteristics of the sea-land transition phase shale reservoir in China and the sea phase shale reservoir have large differences, and the differences are obvious in engineering technology. In the aspect of shale gas development, the engineering technology of marine shale gas development in China is basically mature, a horizontal well fracture network fracturing technology is formed, but a native marine shale gas exploration and development theory and a technical system which take platform horizontal well fracture network fracturing as a core are not formed. In the prior art, research is not carried out on the related technology of sea-land transition facies shale gas development, and a system effective reservoir transformation technology is not formed.
The sea-land transition facies shale reservoir has multiple superposed heterogeneous characteristics, the shale thin layer interaction characteristics are obvious, the structure is complex, the deformation characteristics, the failure mode and the main control factors thereof are not clear, the system understanding is further required to be further deeply realized, the heterogeneity increases the difficulty of the reservoir hydraulic fracturing modification, and the failure form and the fracture expansion form of the rock in the fracturing process become more complex. In sea-land transition facies shale reservoir seam-net fracturing, a complex seam-net is formed in a dessert region, wherein when hydraulic fractures extend from one layer to another layer, the research on how the fractures deflect is urgently needed, and a basis is provided for the sea-land transition facies seam-net fracturing.
At present, a plurality of research is carried out on a hydraulic fracturing simulation experiment device, but the research on a deflection angle measurement model of a hydraulic fracture passing through a multi-layer reservoir stratum in the process of fracturing the multi-layer superposed reservoir stratum of the sea-land transition facies shale, how to depict lithologic interfaces between the layers and how to accurately measure angles of the hydraulic fracture passing through the multi-layer superposed reservoir stratum is deficient. The invention discloses a fracture extension identification method of a hydraulic fracture on a sand shale thin interbed geological interface in a patent of a fracture extension identification method of the hydraulic fracture on the sand shale thin interbed geological interface (CN 103670358A). The extension identification method of the hydraulic fracture on the sand shale thin interbed geological interface is provided, and the extension form determination standard of the thin interbed hydraulic fracture on the thin interbed geological interface is given by correcting and perfecting the existing hydraulic fracture extension model. The invention provides a theoretical method for judging whether a crack penetrates through a thin interbed, and the angle is not measured by carrying out corresponding experiments. The invention discloses a variable-size thin interbedded simulation test prefabricated mould (CN 105675368A) in a patent of variable-size thin interbedded simulation test prefabricated mould (CN 105675368A), which is provided with an adjustable mould and an adjustable hasp, the device realizes the control of the length of the prefabricated thin interbedded, the thickness of the prefabricated thin interbedded and the layer number of the prefabricated thin interbedded, the whole set of prefabricated mould has simple structure and convenient assembly and disassembly, and can be matched with a standard test piece prefabricated mould to prefabricate a series of thin interbedded test pieces with different sizes, strengths and layer numbers. The device only discusses prefabrication of thin inter-layers and lacks deflection angle measurements when hydraulic fractures extend through thin inter-layers. The invention discloses a large true triaxial physical model test method for researching the extension rule of a thin interbed fracturing fracture in a patent of a large true triaxial physical model test method for researching the extension rule of the thin interbed fracturing fracture (CN 107060714A). The test elements of the method approach to real geological conditions, the extension rule of the thin interbed reservoir hydraulic fracturing fracture can be mastered by the method, and the problem of fracture deflection when the hydraulic fracture extends and penetrates through the thin interbed is not discussed. The experimental methods can not reflect the inter-cluster interference during the staged clustering fracturing and the fracture extension behavior under the condition of multi-lithology composite action.
Therefore, new requirements are put forward on a sea-land transition phase hydraulic fracture extension experimental device, which comprises the following steps: 1) The hydraulic fracturing process can be simulated; 2) The deflection angle between multiple lithologies when the hydraulic fracture extends to the lithology interface can be accurately measured; 3) The pressure environment of a multilayer superposed reservoir under the actual stratum environment can be simulated; 4) The proceeding process of the simulation experiment is reasonably controlled through computer monitoring.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a device and a method for measuring the deflection angle of a rock interface of a transition phase of a fracture crossing sea and land.
The technical scheme provided by the invention for solving the technical problems is as follows: a device for measuring a rock interface deflection angle of a transition phase of a crack crossing sea and land comprises a fracturing fluid preparation storage tank, a screw pump, a fracturing pipeline and a multilayer superposed rock plate model device;
the multilayer superposed rock plate model device comprises a rock core chamber, a confining pressure pipeline and a confining pressure pump capable of changing confining pressure above and below the rock core chamber; the confining pressure pump is communicated with the upper end and the lower end of the core chamber through a confining pressure pipeline; placing a multilayer superposed rock plate model in the rock core chamber, wherein a simulated horizontal well shaft with a perforation is arranged in the multilayer superposed rock plate model; and the fracturing fluid preparation storage tank, the screw pump and the simulated horizontal well shaft of the multilayer superposed rock plate model device are communicated in sequence through a fracturing pipeline.
The further technical scheme is that a valve is arranged on the fracturing pipeline.
The further technical scheme is that the multilayer superposed rock plate model comprises at least two calibration scale rock plates and a lithologic interface arranged between two adjacent calibration scale rock plates.
The further technical scheme is that the multilayer superposed rock plate model comprises a sandstone rock plate, a lithologic interface and a shale rock plate which are sequentially arranged from top to bottom.
The further technical scheme is that the multilayer superposed rock plate model comprises a sandstone rock plate, a lithologic interface, a shale rock plate, a lithologic interface and a mudstone rock plate which are sequentially arranged from top to bottom.
The device further comprises a computer and a control circuit, wherein the computer is respectively and electrically connected with the screw pump and the confining pressure pump through the control circuit.
A method for measuring a fracture crossing sea-land transition phase lithologic interface deflection angle comprises the following steps:
s1, calculating the control range of the induced stress field of each crack, and determining a position coordinate x with negligible influence of the induced stress in the horizontal direction, wherein x is (delta sigma delta) with the induced stress component equal to 0.1MPa in the x-axis direction xx A distance of =0.1 MPa), which is a horizontal induced stress influencing distance;
in the formula: delta sigma xx 、Δσ yy 、Δσ zz 、Δσ xy Is the formation induced stress component, MPa; u. of x 、u z Inducing a strain component for the formation;
s2, manufacturing a multilayer superposed rock plate model, wherein a rock plate sample between rock plates and cement are mixed, then a lithologic interface is preset, a simulated horizontal well shaft is preset in one layer, pre-perforation is carried out on the simulated horizontal well shaft, the distance between the perforations is twice of the horizontal induced stress influence distance calculated in the step S1, and the multilayer superposed model is placed into a rock ventricle after being manufactured;
s3, checking whether a pipeline in the device is connected without errors, and whether the connection between the pipeline and a simulated horizontal well shaft and the connection between the pipeline and a pump meet the experimental requirements or not;
s4, preparing a fracturing fluid required in the process of simulating hydraulic fracturing, and adding red ink into the fracturing fluid;
s5, setting confining pressure required by the experimental rock sample through a computer, controlling a confining pressure pump switch, turning on a confining pressure pump, and applying confining pressure to a rock core chamber;
s6, opening a valve, then opening a screw pump switch, and starting a hydraulic simulation process;
s7, judging whether the simulation experiment is finished or not by combining the pump pressure and a corresponding construction pressure curve which are monitored by a computer and the change condition of the liquid level height of the storage tank configured by the fracturing fluid;
s8, after the simulation test is finished, separating rock plates in the multilayer superposed model along a lithologic interface;
s9, processing the face of the rock plate, finding out cracks generated by hydraulic fracturing on the face of the rock plate, determining the positions of the upper layer rock plate and the lower layer rock plate in the process of fracture layer penetration in combination with red ink, and reading out the quantitative positions of the upper layer rock plate and the lower layer rock plate of the hydraulic fracture layer penetration according to scale calibration on the face in advance;
and S10, reading the positions of the fracture on the upper plate and the lower plate in the multi-layer stacked reservoir stratum penetrated by the fracture according to the step S9, drawing a track between the upper rock plate and the lower rock plate when the fracture extends through the multi-layer stacked reservoir stratum, and an included angle diagram of the fracture in the upper rock plate and the lower rock plate and the plate surface, and further determining the time deflection angle of the hydraulic fracture when the hydraulic fracture penetrates through the multi-layer stacked reservoir stratum.
The invention has the following beneficial effects: the method can simulate the hydraulic fracturing process of the multilayer superposed reservoirs in the actual stratum environment; the deflection angle between multiple lithologies when the hydraulic fracture extends to the lithology interface can be accurately measured; the process of the simulation experiment is reasonably controlled by monitoring through a computer.
Drawings
FIG. 1 is a diagram of an overall sea-land transition phase hydraulic fracture extension experiment device of the invention;
FIG. 2 is a lithology interface diagram of an example;
FIG. 3 is a schematic structural diagram of a multi-layered stacked reservoir model in an embodiment;
FIG. 4 is a schematic diagram of calibration of the face scale of the rock panel in the example;
FIG. 5 is a schematic diagram of a deflection angle of a fracture after the fracture passes through a lithologic interface in the embodiment;
FIG. 6 is a schematic diagram of fracture propagation after the fracture crosses the lithologic interface in the example.
FIG. 7 is a graph of the results of optimizing the distance between perforations in an example embodiment.
Shown in the figure: 1-preparing a storage tank by using fracturing fluid; 2-a screw pump; 3-a valve; a-fracturing a pipeline; b-a confining pressure pipeline; 4-a multilayer superposed core model device; 5-a control circuit; 6-enclosing and pressing the pump; 7-a computer; 8-horizontal well model; 9-simulating a wellbore; 10-perforating; 11-lithologic interface; 12-calibrating a graduated rock plate; 13-hydraulic fracture; 14-hydraulic fracture.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in figure 1, the device for measuring the rock boundary deflection angle of the transitional phase of the crack crossing sea and land comprises a fracturing fluid preparation storage tank 1, a screw pump 2, a fracturing pipeline a, a multi-layer superposed rock plate model device, a computer 7 and a control circuit 5; the multilayer laminated rock plate model device comprises a rock core chamber 4, a confining pressure pipeline b and a confining pressure pump 6 capable of changing confining pressure above and below the rock core chamber 4; the confining pressure pump 6 is communicated with the upper end and the lower end of the core chamber 4 through a confining pressure pipeline b; a plurality of layers of superposed rock plate models are placed in the core chamber 4, and are placed in the core chamber in parallel without the conditions of clearance, included angle and the like; a simulated horizontal well shaft 9 with a perforation 10 is arranged in the multilayer overlapped rock plate model; the fracturing fluid preparation storage tank 1, the screw pump 2 and the simulated horizontal well shaft 9 arranged in the multilayer overlapped rock plate model are sequentially communicated through a fracturing pipeline a, and the outlet of the fracturing pipeline a is in threaded connection with the simulated horizontal well shaft 9, so that the air tightness of the device at the joint is ensured;
the fracturing pipeline a is provided with a valve 3, and the multilayer superposed rock plate model comprises at least two calibration scale rock plates 12 and a lithologic interface 11 arranged between two adjacent calibration scale rock plates 12;
the computer 7 is respectively and electrically connected with the screw pump 2 and the confining pressure pump 6 through a control circuit 5; the computer 7 can control parameters such as fracturing fluid discharge capacity, sand adding capacity, screw pump pressure, karyoventricular confining pressure and the like in the hydraulic fracturing simulation process, and in addition, the computer can monitor the pump pressure change of the screw pump in the hydraulic fracturing process and draw a corresponding construction pressure curve;
as shown in fig. 2, the concrete structure of the multilayer laminated rock plate model in this embodiment includes a sandstone rock plate, a lithology interface 11, and a shale rock plate, which are sequentially arranged from top to bottom, wherein the lithology interface 11 is formed by crushing sandstone and shale, then uniformly mixing the sandstone and the shale with cement, and pre-arranging the crushed sandstone and shale between the sandstone rock plate and the shale rock plate, and ensuring that the upper rock plate and the lower rock plate are parallel in the pre-arranging process.
As shown in fig. 3, another specific structure of the multilayer stacked rock plate model in this embodiment includes a sandstone rock plate, a lithologic interface 11, a shale rock plate, a lithologic interface 11, and a mudstone rock plate, which are sequentially arranged from top to bottom.
The specific experimental steps of the implementation are as follows:
(1) Manufacturing a multilayer superposed rock plate model, wherein a rock plate sample between rock plates is mixed with cement and then a lithologic interface is preset, a simulated shaft is preset in one layer, the simulated shaft is subjected to pre-perforation, the distance between perforations is twice of the horizontal induced stress influence distance, and the multilayer superposed rock plate model is placed into a rock chamber after the multilayer superposed model is manufactured;
wherein the horizontal induced stress influence distance is calculated by the following steps:
and calculating the induced stress field generated by each crack. According to the DDM method, firstly, a stress balance equation system of the discrete crack i unit under the action of all units is established:
wherein:
in the formula: (sigma) t ) i 、(σ n ) i The unit i is subjected to shear stress and normal stress in a local coordinate system, pa;
the tangential strain and normal strain of the j unit in a local coordinate system, m; (A) tt ) ij 、(A nt ) ij 、(A tn ) ij 、 (A nn ) ij The value of i, j is 1-N, wherein i and j are tangential stress components and normal corresponding force components which are respectively caused on the unit i by the discontinuous quantities of the tangential displacement and the normal displacement of the unit j; g is the formation shear modulus, pa -1 (ii) a Nu is the poisson ratio of the stratum, and is dimensionless; n is a radical of an alkyl radical j The value of the cosine of the included angle of the z axis of the global coordinate and the zeta axis of the local coordinate of the j unit is dimensionless; l j The cosine value of the included angle of the x axis of the global coordinate and the xi axis of the local coordinate of the j unit is dimensionless; f k Is the partial derivative equation of the Papkovitch function, k ∈{3～6}；
Considering the effect of finite gap height on the stress field and displacement field:
in the formula: (D) ij The three-dimensional crack correction coefficient is dimensionless; h is f Is the hydraulic fracture height, m; d ij The distance between the i unit and the j unit is the crack, m; alpha and beta are theoretical correction constants (alpha =1; beta = 2.3) and are dimensionless; i, j take values from 1 to N.
And multiplying the three-dimensional correction coefficient by each item at the right end of the stress balance equation set in sequence to obtain:
assuming that the hydraulic fracture is in an open state and the net pressure inside the fracture is positive, the arbitrary i-cell stress boundary conditions are as follows:
(σ t ) i ＝0 (10)
(σ n ) i ＝-(p-σ c ) i (11)
in the formula: p is the hydraulic fracture internal pressure, pa; sigma c Is hydraulic fracture wall closure stress, pa.
And (4) according to the stress boundary condition of the discrete unit of the crack, performing joint-vertical type solving. Because the discrete units are divided into N, the equation system has 2N linear equations in total and contains unknowns
And
the number of the solution is 2N, so that the equation system has unique solution. Solved to obtain
And
then, the induced stress component of any point can be calculated by substituting the following equations for summation:
in the formula: delta sigma xx 、Δσ yy 、Δσ zz 、Δσ xy Is the formation induced stress component, MPa; u. of x 、u z Is the formation-induced strain component, m.
The global coordinate to local coordinate conversion equation is as follows:
ξ ij ＝n j (x i -x j )-l j (y i -y j ) (16)
ζ ij ＝l j (x i -x j )+n j (y i -y j ) (17)
in the formula: zeta ij 、ξ ij Is a local coordinate value, m; a is j Is 1/2,m of the j cell length.
And determining a position coordinate x with negligible influence of the induced stress in the horizontal direction, i.e. x is a position coordinate with an induced stress component less than 0.1MPa (delta sigma) in the direction of the x-axis xx <0.1 MPa), where x is the horizontal induced stress influence distance.
(2) Checking whether the pipeline in the device is connected without errors, whether the connection between the pipeline and the simulated well bore and the connection between the pipeline and the pump meet the experimental requirements or not;
(3) Preparing fracturing fluid required in the process of simulating hydraulic fracturing, and adding red ink into the fracturing fluid;
(4) Setting the confining pressure required by the experimental rock sample through a computer, controlling a confining pressure pump switch, turning on the confining pressure pump, and applying confining pressure to a rock core chamber;
(5) Firstly, opening a valve, then opening a screw pump switch, and starting a hydraulic simulation process;
(6) Judging whether the simulation experiment is finished or not by combining the change condition of the liquid level height of the storage tank configured by the fracturing fluid through the pump pressure and a corresponding construction pressure curve monitored by a computer;
(7) After the simulation test is finished, separating rock plates in the multilayer superposed model along a lithologic interface;
(8) The method comprises the steps of removing a preset lithologic interface as far as possible by processing a rock plate surface, finding a crack generated by hydraulic fracturing on the rock plate surface, determining the positions of an upper layer rock plate and a lower layer rock plate in the process of crack penetration in combination with red ink assistance, and reading the quantitative positions of the hydraulic crack penetration on the upper layer rock plate and the lower layer rock plate according to scale calibration on the plate surface in advance;
(9) And (5) according to the positions of the fractures in the multi-layer stacked reservoir stratum and the upper and lower plates read out in the step (8), drawing a track between the upper and lower rock plates and an angle graph (shown in figure 5) between the fractures in the upper and lower rock plates when the fractures extend through the multi-layer stacked reservoir stratum, and further determining the deflection angle (shown in figure 6) when the hydraulic fractures break through the lithologic interface when penetrating through the multi-layer stacked reservoir stratum.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention.
Claims (7)
1. A device for measuring a rock interface deflection angle of a transition phase of a crack crossing sea and land is characterized by comprising a fracturing fluid preparation storage tank (1), a screw pump (2), a fracturing pipeline (a) and a multilayer superposed rock plate model device;
the multilayer laminated rock plate model device comprises a rock core chamber (4), a confining pressure pipeline (b) and a confining pressure pump (6) capable of changing confining pressure above and below the rock core chamber (4); the confining pressure pump (6) is communicated with the upper end and the lower end of the core chamber (4) through a confining pressure pipeline (b); a multilayer laminated rock plate model is placed in the rock core chamber (4), and a simulated horizontal well shaft (9) with a perforation (10) is arranged in the multilayer laminated rock plate model; the fracturing fluid preparation storage tank (1), the screw pump (2) and the simulated horizontal well shaft (9) of the multilayer overlapped rock plate model device are communicated in sequence through a fracturing pipeline (a).
2. The device for measuring the rock boundary angle of a transition phase between a fracture and the sea and land according to claim 1, wherein a valve (3) is arranged on the fracturing pipeline (a).
3. A fracture-crossing sea-land transition phase lithologic interface deflection angle measurement device according to claim 2, characterized in that the multilayer stacked rock plate model comprises at least two calibrated scale rock plates (12) and a lithologic interface (11) arranged between two adjacent calibrated scale rock plates (12).
4. The device for measuring the transition phase lithologic interface crossing through sea and land by the crack as claimed in claim 3, wherein the multi-layer stacked rock plate model comprises a sandstone rock plate, a lithologic interface (11) and a shale rock plate which are arranged in sequence from top to bottom.
5. The device for measuring the transition phase lithologic interface crossing crack according to claim 3, wherein the multilayer laminated rock plate model comprises a sandstone rock plate, a lithologic interface (11), a shale rock plate, a lithologic interface (11) and a mudstone rock plate which are arranged from top to bottom in sequence.
6. The device for measuring the rock interface deflection angle of the transition phase between the fracture and the sea and the land according to the claim 3, characterized in that the device also comprises a computer (7) and a control line (5), wherein the computer (7) is electrically connected with the screw pump (2) and the confining pressure pump (6) through the control line (5).
7. A method for measuring a fracture cross sea-land transition phase lithology interface deflection angle is characterized by comprising the following steps:
s1, calculating the control range of the induced stress field of each crack, and determining the induced stress component delta sigma along the x-axis direction xx A distance equal to 0.1MPa, which is the horizontal induced stress influence distance;
Δσ zz ＝ν(Δσ xx +Δσ yy )
in the formula: delta sigma xx 、Δσ yy 、Δσ zz 、Δσ xy Is the formation induced stress component, MPa;
s2, manufacturing a multilayer superposed rock plate model, wherein a rock plate sample between rock plates and cement are mixed, then a lithologic interface is preset, a simulated horizontal well shaft is preset in one layer, pre-perforation is carried out on the simulated horizontal well shaft (9), the distance between the perforations (10) is twice of the horizontal induced stress influence distance, and the multilayer superposed rock plate model is placed into a rock chamber after the multilayer superposed model is manufactured;
s3, checking whether the pipeline in the device is connected without errors, and whether the connection between the pipeline and the simulated horizontal well shaft (9) and the connection between the pipeline and the pump meet the experimental requirements or not;
s4, preparing fracturing fluid required in the process of simulating hydraulic fracturing, and adding red ink into the fracturing fluid;
s5, setting confining pressure required by the experimental rock sample through a computer, controlling a confining pressure pump switch, turning on a confining pressure pump (6), and applying confining pressure to a rock core chamber;
s6, opening the valve (3), then opening a screw pump switch, and starting a hydraulic simulation process;
s7, judging whether the simulation experiment is finished or not by combining the pump pressure and a corresponding construction pressure curve which are monitored by a computer and the change condition of the liquid level height of the storage tank configured by the fracturing fluid;
s8, after the simulation test is finished, separating rock plates in the multilayer superposed model along a lithologic interface;
s9, processing the face of the rock plate, finding a crack generated by hydraulic fracturing on the face of the rock plate, determining the positions of an upper layer rock plate and a lower layer rock plate in the process of crack penetration in combination with red ink assistance, and reading the quantitative positions of the hydraulic crack penetration on the upper layer rock plate and the lower layer rock plate according to scale calibration on the face in advance;
and S10, according to the positions of the cracks in the multilayer superposed reservoir stratum and the upper and lower plates read out in the step S9, drawing a track between the upper and lower rock plates and an angle diagram between the cracks in the upper and lower rock plates and the plate surfaces when the cracks extend through the multilayer superposed reservoir stratum, and further determining the deflection angle when the hydraulic cracks break through the lithologic interface when passing through the multilayer superposed reservoir stratum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211294003.1A CN115614025B (en) | 2022-10-21 | 2022-10-21 | Device and method for measuring lithology interface deflection angle of crack crossing sea-land transition phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211294003.1A CN115614025B (en) | 2022-10-21 | 2022-10-21 | Device and method for measuring lithology interface deflection angle of crack crossing sea-land transition phase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115614025A true CN115614025A (en) | 2023-01-17 |
| CN115614025B CN115614025B (en) | 2024-07-16 |
Family
ID=84865044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211294003.1A Active CN115614025B (en) | 2022-10-21 | 2022-10-21 | Device and method for measuring lithology interface deflection angle of crack crossing sea-land transition phase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115614025B (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006022684A1 (en) * | 2006-05-16 | 2007-11-22 | Joachim Dipl.-Ing. Loos | Method for orientation of fracture in boreholes and mountains, involves identifying dip, strike and rejected measure of respective identified geological troubles for determining fractures |
| CN103485759A (en) * | 2013-09-10 | 2014-01-01 | 中国石油大学(北京) | Oil-gas well hydraulically-created-fracture expansion visualization experiment method and oil-gas well hydraulically-created-fracture expansion visualization experiment device |
| CN203420700U (en) * | 2013-09-05 | 2014-02-05 | 东北石油大学 | Measuring device for rock fracture steering simulation experiment |
| CN104060976A (en) * | 2014-07-01 | 2014-09-24 | 中国石油大学(北京) | Method for physically simulating sectional hydrofracture of different well types of perforated well shafts |
| CN105952429A (en) * | 2016-05-17 | 2016-09-21 | 中国地质大学（武汉） | Terrestrial facies shale gas fracture network fracture parameter optimizing method |
| US20160363691A1 (en) * | 2015-06-15 | 2016-12-15 | Petrochina Company Limited | Physical simulation method and experiment device of fracture-cavity carbonate reservoir hydrocarbon charge |
| CN206174943U (en) * | 2016-11-17 | 2017-05-17 | 山西页岩气有限公司 | Coal seam / rammell / compacted zone horizontal well staged fracturing experimental apparatus |
| CN109209380A (en) * | 2018-09-30 | 2019-01-15 | 中国矿业大学 | A kind of mine, which picks up, fills control recovery method |
| CN109359376A (en) * | 2018-10-10 | 2019-02-19 | 北京科技大学 | Hydraulically created fracture sentences knowledge method in the extension of shale reservoir intrinsic fracture interface |
| CN110318743A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Thin interbed shale oil reservoir fracturing simulation experiment method and device |
| US20200225384A1 (en) * | 2019-02-25 | 2020-07-16 | University Of Science And Technology Beijing | Methods for Optimizing Bunch Distance of Fractured Horizontal Wells of Shale Gas |
| US20210025274A1 (en) * | 2019-07-23 | 2021-01-28 | Instituto Mexicano Del Petroleo | System to determine existing fluids remaining saturation in homogeneous and/or naturally fractured reservoirs |
| CN112765807A (en) * | 2021-01-15 | 2021-05-07 | 西南石油大学 | Method for calculating deviation angle of lithologic interface of transition facies of crossing sea and land by crack |
| CN213331053U (en) * | 2020-10-28 | 2021-06-01 | 西南石油大学 | Shale gas repeated fracturing temporary plugging simulation experiment device |
| CN113008686A (en) * | 2021-03-02 | 2021-06-22 | 中国石油大学(北京) | Hard and brittle shale crack opening simulation device |
| CN113803041A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Volume fracturing design method and system |
| CN113959853A (en) * | 2021-10-20 | 2022-01-21 | 安徽理工大学 | Experimental simulation device for rock stratum fracturing and radial seepage under high-temperature condition |
| CN114542059A (en) * | 2022-02-10 | 2022-05-27 | 中国石油大学(北京) | Layered artificial rock sample and preparation method thereof |
-
2022
- 2022-10-21 CN CN202211294003.1A patent/CN115614025B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006022684A1 (en) * | 2006-05-16 | 2007-11-22 | Joachim Dipl.-Ing. Loos | Method for orientation of fracture in boreholes and mountains, involves identifying dip, strike and rejected measure of respective identified geological troubles for determining fractures |
| CN203420700U (en) * | 2013-09-05 | 2014-02-05 | 东北石油大学 | Measuring device for rock fracture steering simulation experiment |
| CN103485759A (en) * | 2013-09-10 | 2014-01-01 | 中国石油大学(北京) | Oil-gas well hydraulically-created-fracture expansion visualization experiment method and oil-gas well hydraulically-created-fracture expansion visualization experiment device |
| CN104060976A (en) * | 2014-07-01 | 2014-09-24 | 中国石油大学(北京) | Method for physically simulating sectional hydrofracture of different well types of perforated well shafts |
| US20160363691A1 (en) * | 2015-06-15 | 2016-12-15 | Petrochina Company Limited | Physical simulation method and experiment device of fracture-cavity carbonate reservoir hydrocarbon charge |
| CN105952429A (en) * | 2016-05-17 | 2016-09-21 | 中国地质大学（武汉） | Terrestrial facies shale gas fracture network fracture parameter optimizing method |
| CN206174943U (en) * | 2016-11-17 | 2017-05-17 | 山西页岩气有限公司 | Coal seam / rammell / compacted zone horizontal well staged fracturing experimental apparatus |
| CN110318743A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Thin interbed shale oil reservoir fracturing simulation experiment method and device |
| CN109209380A (en) * | 2018-09-30 | 2019-01-15 | 中国矿业大学 | A kind of mine, which picks up, fills control recovery method |
| CN109359376A (en) * | 2018-10-10 | 2019-02-19 | 北京科技大学 | Hydraulically created fracture sentences knowledge method in the extension of shale reservoir intrinsic fracture interface |
| US20200225384A1 (en) * | 2019-02-25 | 2020-07-16 | University Of Science And Technology Beijing | Methods for Optimizing Bunch Distance of Fractured Horizontal Wells of Shale Gas |
| US20210025274A1 (en) * | 2019-07-23 | 2021-01-28 | Instituto Mexicano Del Petroleo | System to determine existing fluids remaining saturation in homogeneous and/or naturally fractured reservoirs |
| CN113803041A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Volume fracturing design method and system |
| CN213331053U (en) * | 2020-10-28 | 2021-06-01 | 西南石油大学 | Shale gas repeated fracturing temporary plugging simulation experiment device |
| CN112765807A (en) * | 2021-01-15 | 2021-05-07 | 西南石油大学 | Method for calculating deviation angle of lithologic interface of transition facies of crossing sea and land by crack |
| CN113008686A (en) * | 2021-03-02 | 2021-06-22 | 中国石油大学(北京) | Hard and brittle shale crack opening simulation device |
| CN113959853A (en) * | 2021-10-20 | 2022-01-21 | 安徽理工大学 | Experimental simulation device for rock stratum fracturing and radial seepage under high-temperature condition |
| CN114542059A (en) * | 2022-02-10 | 2022-05-27 | 中国石油大学(北京) | Layered artificial rock sample and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 许文俊;李勇明;赵金洲;陈曦宇;彭;: "页岩气水平井分段压裂复杂缝网形成机制", 油气藏评价与开发, no. 05, 26 October 2017 (2017-10-26) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115614025B (en) | 2024-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yizhao et al. | Features of fracture height propagation in cross-layer fracturing of shale oil reservoirs | |
| CN103256046B (en) | Unconventionaloil pool hides method and the device that horizontal well stitches the simulation of long fracturing parameter entirely | |
| CN104863577B (en) | The method that formation pore pressure is predicted using the P wave propagation time | |
| CN107038268B (en) | Method for determining water flooding wave sum coefficient of heterogeneous reservoir five-point well pattern | |
| CN111460601A (en) | Orthotropic formation ground stress prediction method based on rock physics modeling | |
| CN109033504B (en) | Oil-water well casing damage prediction method | |
| CN105334090A (en) | Manufacturing method of coal-bearing production layer set fracturing physical modeling samples | |
| GB2515411A (en) | Well simulation | |
| Huang et al. | A review of flow mechanism and inversion methods of fracture network in shale gas reservoirs | |
| CN115614025A (en) | Device and method for measuring deflection angle of rock interface of transition facies of crack crossing sea and land | |
| Zhou et al. | Fluid flow through porous sandstone with overprinting and intersecting geological structures of various types | |
| Cai et al. | A new fractal temporal conductivity model for propped fracture and its application in tight reservoirs | |
| Pankaj et al. | Impact of Natural Fractures Beyond the Hydraulic Fracture Complexity in Unconventional Reservoirs–A Permian Case Study | |
| CN115618274A (en) | Comprehensive identification method for ultra-deep reservoir paleo-stress transition zone | |
| Cai et al. | Characteristics of hydraulic fracture penetration behavior in tight oil with multi-layer reservoirs | |
| Zhang et al. | Experimental study on the hydraulic fracture propagation of laminar argillaceous limestone continental shale | |
| CN114718550A (en) | Experimental device and method for evaluating well wall damage | |
| CN108459357A (en) | The evaluation method of stratum undercompaction and fluid expansion superpressure | |
| CN115341886A (en) | Composite rock stratum fracturing simulation method and device | |
| CN114482965A (en) | Horizontal well fracturing simulation test device and method | |
| Pei et al. | The Influence of Development Target Depletion on Stress Evolution and Well Completion of Upside Target in the Permian Basin | |
| CN113777668A (en) | Geostress calculation method and device for tight gas reservoir of sand-shale interbed | |
| CN113187463B (en) | Pore pressure while drilling prediction method based on stratum overpressure single-cause contribution rate | |
| Parsegov | Physics-Based Forward Modeling of Multistage Hydraulic Fracturing in Unconventional Plays | |
| CN212782419U (en) | Water-oil emulsification experimental device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |