CN110955994B - Combustible ice exploitation environment safety virtual simulation evaluation system and method - Google Patents
Combustible ice exploitation environment safety virtual simulation evaluation system and method Download PDFInfo
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Abstract
The invention discloses a combustible ice mining environment safety virtual simulation evaluation system and a method, wherein the system comprises the following steps: the infrastructure layer is used for reading and writing access and inter-device access to the bottom layer data and comprises a data access interface and a device access interface; the data resource and processing layer is used for generating data of the combustible ice exploitation environment, including atmospheric environment data, seawater environment data, seabed environment data and underground environment data; the visual service layer is used for providing various service modules for the system, including a data importing module, a real-time monitoring data acquisition module, a data organization and management module, a production management module and a risk assessment module; the system and the method disclosed by the invention can display the on-site exploitation environment in a three-dimensional visualization mode, monitor daily environment risks and reduce on-site safety risks.
Description
Technical Field
The invention relates to a virtual simulation system, in particular to a combustible ice mining environment safety virtual simulation evaluation system and method.
Background
In the field of combustible ice exploitation environment monitoring, as a seabed natural gas hydrate reservoir layer mostly does not have a complete trap structure and a compact cover layer, geological disasters such as seabed landslide and the like possibly caused by development of the reservoir layer are high in risk. And natural gas hydrate exploitation can further aggravate global greenhouse effect and marine ecological environment, and cause a series of environmental effects. Through realizing virtual simulation and early warning evaluation technology, engineering technicians can be helped to become familiar with the environmental risk of combustible ice exploitation and formulate reasonable countermeasures, the environmental protection of the whole exploitation process is enhanced, and the safety protection level is improved.
At present, the environmental safety research of combustible ice exploitation at home and abroad is less, and the method mainly comprises the following steps of high unhealthy cost, lack of corresponding environmental monitoring data and no mature early warning analysis method of a combustible ice exploitation environment three-dimensional monitoring system. Therefore, the combustible ice exploitation environment monitoring simulation technology is researched pertinently, a risk early warning and evaluating technology system and method are established, and the safety of the ocean environment in the natural gas hydrate exploitation activity can be guaranteed efficiently and with low cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides a combustible ice exploitation environment safety virtual simulation evaluation system and a combustible ice exploitation environment safety virtual simulation evaluation method, which are characterized in that a three-dimensional visualization mode is used for displaying a scene exploitation environment, scene reconstruction can be carried out according to different well arrangement modes and monitoring schemes, a simulation scene is displayed in a large-screen projection mode without being limited by climatic conditions and field space, and an operator is more familiar with field monitoring equipment, is easier to identify field environment risks and reduces field safety risks. The monitoring of daily environmental risks can be carried out, and the strain capacity can be improved to timely treat various environmental risks in the exploitation of the combustible ice.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a combustible ice production environment safety virtual simulation assessment system, comprising:
the infrastructure layer is used for reading and writing access and inter-device access to the bottom layer data and comprises a data access interface and a device access interface;
the data resource and processing layer is used for generating data of the combustible ice exploitation environment, including atmospheric environment data, seawater environment data, seabed environment data and underground environment data;
the visual service layer is used for providing various service modules for the system, including a data importing module, a real-time monitoring data acquisition module, a data organization and management module, a production management module and a risk assessment module;
the application portal layer is used for roaming display, disaster display and risk assessment display of scenes.
In the above scheme, the atmospheric environmental data comprise atmospheric temperature, pressure, wind speed, wind direction parameters, methane and carbon dioxide content, ocean surface wave height and wind level parameters.
In the above scheme, the seawater environmental data comprises dissolved methane, carbon dioxide, temperature, salinity, pressure, dissolved oxygen, pH value, turbidity, chlorophyll, seawater flow rate, flow direction parameters and Doppler acoustic ocean current information in the seawater.
In the scheme, the seabed environment data comprise deformation of seabed topography, temperature and pressure of each point of the seabed, and seawater methane and carbon dioxide content on the surface of the seabed.
In the above scheme, the downhole environment data comprises a wellhead and temperature and pressure parameters around the wellhead.
The combustible ice mining environment safety virtual simulation evaluation method adopts the combustible ice mining environment safety virtual simulation evaluation system, and comprises the following steps:
(1) The data of the atmosphere, the sea water, the seabed and all underground monitoring points are respectively simulated and generated through access reading and writing of the bottom data and are stored in a database;
(2) Three-dimensional modeling software is adopted to complete three-dimensional modeling of marine environment, exploitation equipment, monitoring system and equipment;
(3) Performing action design and script writing according to the exploitation process flow and the working period of the monitoring equipment to complete the safety virtual reality software package of the combustible ice exploitation environment;
(4) Based on a virtual reality software package, a virtual simulation scene of a combustible ice exploitation environment is realized by utilizing a graph generation and stereoscopic projection display technology;
(5) Based on quantitative and qualitative environmental risk assessment methods, main monitoring component data values of risk conditions are set to be normal, abnormal and alarm three levels, and whether risk exists is assessed according to the range of real-time data;
(6) And on the application portal layer, the switching of the environment risk event and the output of the alarm are realized.
In the above scheme, the specific method of three-dimensional modeling is as follows:
the actual exploitation equipment and the monitoring equipment are restored, and a three-dimensional model of the actual exploitation equipment and the monitoring equipment is displayed;
the atmospheric environment simulation judges whether methane leaks into the atmosphere according to the numerical values obtained by methane sensors arranged in the atmosphere, calculates the leakage amount and leakage rate of the methane, simulates a methane leakage curve in real time, establishes a greenhouse gas volume fraction change model, analyzes the greenhouse effect saturation of greenhouse gas, predicts the change trend of future surface temperature rise, adopts a computational fluid dynamics model to simulate the condition that the methane leaks into the atmosphere from underground and stratum based on FLACS software, describes the diffusion process of gas cloud together according to a gas dynamics equation and a turbulence equation, and solves the method by using a finite element method, a finite difference method or a finite volume method;
the seabed environment simulation calculates methane leakage speed, methane quantity and seabed sedimentation degree according to data obtained by sensors arranged on the seabed, a curve of methane leakage and seabed sedimentation is simulated in real time, a finite difference method model is adopted, a constitutive model of Mohr-Coulomb soil mass is applied, and the stratum sedimentation condition caused by methane leakage is simulated based on FLAC3D software;
the well bottom environment simulation adopts a finite element method model, a well shaft structural elastoplastic material model is applied, well shaft deformation conditions are simulated based on ANSYS software, a finite element analysis method simplifies a complex solving domain into a system formed by finite element bodies together, each finite element body is endowed with a reasonable approximate solution, solutions meeting complex solving conditions are deduced together through coordination of the finite element bodies, unstable change data of a flammable ice layer are monitored and simulated, a combined body cylinder theory is applied, and well shaft deformation safety risk assessment is carried out by establishing a numerical calculation model comprising coupling effects of a well shaft pore pressure field and a well shaft liquid temperature field of a flammable ice stratum;
according to the size of a well bore, a geometric model is built by utilizing ANSYS finite elements, a physical model of a sleeve-cement sheath-stratum combination containing combustible ice is built, calculation conditions, boundary conditions and constraint modes required by analysis of a well bore system, a pressure field and a temperature field are input, the material characteristics of the well bore are determined according to the actual characteristics of a pipe, and finally, a proper unit type is selected according to the condition of the diameter-thickness ratio of the cross section of the well bore.
Through the technical scheme, the combustible ice mining environment safety virtual simulation evaluation system and the method provided by the invention have the following beneficial effects:
the combustible ice mining environment safety virtual simulation training system provided by the invention truly restores the scene in a three-dimensional visual mode, so that operators are more familiar with the scene equipment and the environment risk, and the safety risk is reduced. The system can perform conventional environment monitoring display and emergency training for improving risk accident handling, is safe, controllable, configurable and repeatable for many times without being limited by climate conditions and site space, provides technical preparation for future combustible ice commercial exploitation, and provides reference significance for environmental risks possibly encountered in combustible ice exploitation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of a virtual simulation evaluation system for safety of a combustible ice mining environment according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides a combustible ice mining environment safety virtual simulation evaluation system, as shown in fig. 1, which comprises:
1. the infrastructure layer is used for reading and writing access and inter-device access to the bottom layer data and comprises a data access interface and a device access interface;
2. the data resource and processing layer is used for generating data of the combustible ice exploitation environment, including atmospheric environment data, seawater environment data, seabed environment data and underground environment data;
(1) The atmospheric environmental data comprise atmospheric temperature, pressure, wind speed, wind direction parameters, methane and carbon dioxide content, ocean surface wave height and wind level parameters.
(2) The seawater environmental data includes dissolved methane, carbon dioxide, temperature, salinity, pressure, dissolved oxygen, pH, turbidity, chlorophyll, seawater flow rate, flow direction parameters, and doppler acoustic ocean current information in the seawater.
(3) The seabed environment data comprise the deformation of seabed topography, the temperature and pressure of each point of the seabed, and the seawater methane and carbon dioxide content on the surface of the seabed.
(4) The downhole environmental data includes temperature and pressure parameters surrounding the wellhead.
3. The visual service layer is used for providing various service modules for the system, including a data importing module, a real-time monitoring data acquisition module, a data organization and management module, a production management module and a risk assessment module;
(1) The data importing module mainly utilizes existing mature commercial data and a basic three-dimensional entity model, and firstly imports geographic information data and secondly imports the three-dimensional entity model.
(2) The real-time monitoring data acquisition module is used for reflecting the real state of the mining sea area at any moment so as to realize the monitoring management function of the environment, acquiring real-time environment monitoring information from each monitoring sensor and updating the state of the system, wherein the real-time monitoring data mainly comprises environment monitoring data and equipment state data.
(3) The data organization and management module is used for three-dimensional visualization of the system, three-dimensional visual display of environmental elements, interactive expression, reproduction, trend analysis and other data service functions, and the data service functions depend on the data model and organization mode. The data in the system are classified into two major categories, namely basic data and production data, and different organization management modes are needed to be adopted respectively. In addition, for the data needing post-processing, the data needs to be sent to a visualization module through preprocessing steps including data cleaning, data integration, data transformation and the like so as to monitor the operation condition of the system.
(4) And the production management module is used for providing inquiry, statistics and analysis of real-time information (including safety information and equipment states) generated in the production process, outputting various statistical analysis reports, inquiring the states of various equipment in real time, issuing alarm information and the like.
(5) The risk assessment module is mainly used for assessing the current environmental data by utilizing the existing risk level grading method according to the acquired real-time environmental data.
4. And the application portal layer is used for roaming display, risk scenario display and risk assessment display of the scene.
(1) The roaming display of the scene can intuitively display the submarine combustible ice exploitation environment, exploitation engineering facilities, the layout of various production auxiliary equipment, the real-time position, posture, working condition, real-time monitoring data and the like of the environment monitoring equipment, and the roaming function can interact with the system to sense the information.
(2) The risk scenario display can display typical risks which can be encountered by combustible ice exploitation, including greenhouse effect, seawater hypoxia, seawater acidification, seabed sedimentation, seabed landslide and wellbore deformation, and is used for constructing a model and carrying out visual three-dimensional simulation display.
(3) And (3) risk assessment display, wherein when the assessment system judges that the data exceeds the numerical range of the normal mining environment, an environment abnormality alarm is made, and risk assessment display is carried out.
The early warning and evaluation display panel of the system comprises four major parts of an atmospheric environment, a seawater environment, a seabed environment and a downhole environment.
(1) The atmospheric environment comprises an operation indicator lamp, a normal indicator lamp, a risk indicator lamp, an alarm indicator lamp and an early warning indicator lamp. When the atmospheric environment simulation evaluation function is started, the corresponding operation indicator lamp is turned on, and when the monitored environment data display environment is in a normal condition, the normal indicator lamp is turned on; when the monitored environment data display environment is in an abnormal condition, a warning indicator light is on; and when judging that a risk event is about to occur according to the evaluation criteria of the parameters, the early warning indicator light is on, and when the early warning event occurs, the risk indicator light is on.
(2) The seawater environment comprises an operation indicator lamp, a normal indicator lamp, a risk indicator lamp, an alarm indicator lamp and an early warning indicator lamp. When the seawater environment simulation evaluation function is started, the corresponding running indicator lamp is lighted, and when the monitored environment data display environment is in a normal condition, the normal indicator lamp is lighted; when the monitored environment data display environment is in an abnormal condition, a warning indicator light is on; and when judging that a risk event is about to occur according to the evaluation criteria of the parameters, the early warning indicator light is on, and when the early warning event occurs, the risk indicator light is on.
(3) The seabed environment comprises an operation indicator lamp, a normal indicator lamp, a risk indicator lamp, an alarm indicator lamp and an early warning indicator lamp. When the seabed environment simulation evaluation function is started, the corresponding running indicator lamp is lighted, and when the monitored environment data display environment is in a normal condition, the normal indicator lamp is lighted; when the monitored environment data display environment is in an abnormal condition, a warning indicator light is on; and when judging that a risk event is about to occur according to the evaluation criteria of the parameters, the early warning indicator light is on, and when the early warning event occurs, the risk indicator light is on.
(4) The underground environment comprises an operation indicator lamp, a normal indicator lamp, a risk indicator lamp, an alarm indicator lamp and an early warning indicator lamp. When the underground environment simulation evaluation function is started, the corresponding running indicator lamp is lighted, and when the monitored environment data display environment is in a normal condition, the normal indicator lamp is lighted; when the monitored environment data display environment is in an abnormal condition, a warning indicator light is on; and when judging that a risk event is about to occur according to the evaluation criteria of the parameters, the early warning indicator light is on, and when the early warning event occurs, the risk indicator light is on.
The combustible ice mining environment safety virtual simulation evaluation method adopts the combustible ice mining environment safety virtual simulation evaluation system, and comprises the following steps:
(1) The data of the atmosphere, the sea water, the seabed and all underground monitoring points are respectively simulated and generated through access reading and writing of the bottom data and are stored in a database;
(2) Three-dimensional modeling software is adopted to complete three-dimensional modeling of marine environment, exploitation equipment, monitoring system and equipment;
(3) Performing action design and script writing according to the exploitation process flow and the working period of the monitoring equipment to complete the safety virtual reality software package of the combustible ice exploitation environment;
(4) Based on a virtual reality software package, a virtual simulation scene of a combustible ice exploitation environment is realized by utilizing a graph generation and stereoscopic projection display technology;
(5) Based on quantitative and qualitative environmental risk assessment methods, main monitoring component data values of risk conditions are set to be normal, abnormal and alarm three levels, and whether risk exists is assessed according to the range of real-time data;
(6) And on the application portal layer, the switching of the environment risk event and the output of the alarm are realized.
In the scheme, the specific method for three-dimensional modeling is as follows:
the actual exploitation equipment and the monitoring equipment are restored, and a three-dimensional model of the actual exploitation equipment and the monitoring equipment is displayed;
the atmospheric environment simulation judges whether methane leaks into the atmosphere according to the numerical values obtained by methane sensors arranged in the atmosphere, calculates the leakage amount and leakage rate of the methane, simulates a methane leakage curve in real time, establishes a greenhouse gas volume fraction change model, analyzes the greenhouse effect saturation of greenhouse gas, predicts the change trend of future surface temperature rise, adopts a computational fluid dynamics model to simulate the condition that the methane leaks into the atmosphere from underground and stratum based on FLACS software, describes the diffusion process of gas cloud together according to a gas dynamics equation and a turbulence equation, and solves the method by using a finite element method, a finite difference method or a finite volume method;
the seabed environment simulation calculates methane leakage speed, methane quantity and seabed sedimentation degree according to data obtained by sensors arranged on the seabed, a curve of methane leakage and seabed sedimentation is simulated in real time, a finite difference method model is adopted, a constitutive model of Mohr-Coulomb soil mass is applied, and the stratum sedimentation condition caused by methane leakage is simulated based on FLAC3D software;
adopting a finite element method model for well bottom environment simulation, adopting a shaft structure elastoplastic material model, simulating shaft deformation condition based on ANSYS software, simplifying a complex solving domain into a system formed by finite unit bodies together by a finite element analysis method, enabling each finite unit body to give a reasonable approximate solution, deducing solutions meeting complex solving conditions together through mutual coordination of the finite unit bodies, carrying out shaft deformation safety risk assessment by monitoring and simulating unstable change data of a flammable ice layer and applying a combined body cylinder theory and establishing a numerical calculation model comprising coupling action of a hole pressure field of a shaft of a flammable ice stratum and a temperature field of the shaft liquid;
according to the size of a well bore, a geometric model is built by utilizing ANSYS finite elements, a physical model of a sleeve-cement sheath-stratum combination containing combustible ice is built, calculation conditions, boundary conditions and constraint modes required by analysis of a well bore system, a pressure field and a temperature field are input, the material characteristics of the well bore are determined according to the actual characteristics of a pipe, and finally, a proper unit type is selected according to the condition of the diameter-thickness ratio of the cross section of the well bore.
The risk assessment method comprises the steps of setting the data values of main monitoring components of risk conditions into three grades of normal, abnormal and alarming, assessing whether risks exist according to the belonging range of real-time data, and constructing alarming and early warning analysis events of all environmental risk events; in view of the current research situation of risk analysis and evaluation methods of combustible ice exploitation, the atmospheric environment evaluation adopts a single factor evaluation model, the sea water environment evaluation adopts a fuzzy comprehensive evaluation method, a qualitative evaluation method is adopted in the sea bed environment evaluation, and a qualitative evaluation method is adopted in the underground environment evaluation.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The combustible ice mining environment safety virtual simulation evaluation method is characterized by comprising the following steps of:
(1) The data of the atmosphere, the sea water, the seabed and all underground monitoring points are respectively simulated and generated through access reading and writing of the bottom data and are stored in a database;
(2) Three-dimensional modeling software is adopted to complete three-dimensional modeling of marine environment, exploitation equipment, monitoring system and equipment;
(3) Performing action design and script writing according to the exploitation process flow and the working period of the monitoring equipment to complete the safety virtual reality software package of the combustible ice exploitation environment;
(4) Based on a virtual reality software package, a virtual simulation scene of a combustible ice exploitation environment is realized by utilizing a graph generation and stereoscopic projection display technology;
(5) Based on quantitative and qualitative environmental risk assessment methods, main monitoring component data values of risk conditions are set to be normal, abnormal and alarm three levels, and whether risk exists is assessed according to the range of real-time data;
(6) On an application portal layer, switching of environment risk events and output of alarm are realized;
the specific method for three-dimensional modeling is as follows:
the actual exploitation equipment and the monitoring equipment are restored, and a three-dimensional model of the actual exploitation equipment and the monitoring equipment is displayed;
the atmospheric environment simulation judges whether methane leaks into the atmosphere according to the numerical values obtained by methane sensors arranged in the atmosphere, calculates the leakage amount and leakage rate of the methane, simulates a methane leakage curve in real time, establishes a greenhouse gas volume fraction change model, analyzes the greenhouse effect saturation of greenhouse gas, predicts the change trend of future surface temperature rise, adopts a computational fluid dynamics model to simulate the condition that the methane leaks into the atmosphere from underground and stratum based on FLACS software, describes the diffusion process of gas cloud together according to a gas dynamics equation and a turbulence equation, and solves the method by using a finite element method, a finite difference method or a finite volume method;
the seabed environment simulation calculates methane leakage speed, methane quantity and seabed sedimentation degree according to data obtained by sensors arranged on the seabed, a curve of methane leakage and seabed sedimentation is simulated in real time, a finite difference method model is adopted, a constitutive model of Mohr-Coulomb soil mass is applied, and the stratum sedimentation condition caused by methane leakage is simulated based on FLAC3D software;
adopting a finite element method model for well bottom environment simulation, adopting a shaft structure elastoplastic material model, simulating shaft deformation condition based on ANSYS software, simplifying a complex solving domain into a system formed by finite unit bodies together by a finite element analysis method, enabling each finite unit body to give a reasonable approximate solution, deducing solutions meeting complex solving conditions together through mutual coordination of the finite unit bodies, carrying out shaft deformation safety risk assessment by monitoring and simulating unstable change data of a flammable ice layer and applying a combined body cylinder theory and establishing a numerical calculation model comprising coupling action of a hole pressure field of a shaft of a flammable ice stratum and a temperature field of the shaft liquid;
according to the size of a well bore, a geometric model is built by utilizing ANSYS finite elements, a physical model of a sleeve-cement sheath-stratum combination containing combustible ice is built, calculation conditions, boundary conditions and constraint modes required by analysis of a well bore system, a pressure field and a temperature field are input, the material characteristics of the well bore are determined according to the actual characteristics of a pipe, and finally, a proper unit type is selected according to the condition of the diameter-thickness ratio of the cross section of the well bore.
2. A system for performing the combustible ice production environment safety virtual simulation assessment method of claim 1, comprising:
the infrastructure layer is used for reading and writing access and inter-device access to the bottom layer data and comprises a data access interface and a device access interface;
the data resource and processing layer is used for generating data of the combustible ice exploitation environment, including atmospheric environment data, seawater environment data, seabed environment data and underground environment data;
the visual service layer is used for providing various service modules for the system, including a data importing module, a real-time monitoring data acquisition module, a data organization and management module, a production management module and a risk assessment module;
and the application portal layer is used for roaming display, risk scenario display and risk assessment display of the scene.
3. The system of claim 2, wherein the atmospheric environmental data includes atmospheric temperature, pressure, wind speed, wind direction parameters, methane, carbon dioxide content, ocean surface wave height, wind level parameters.
4. The system of claim 2, wherein the seawater environmental data comprises dissolved methane, carbon dioxide, temperature, salinity, pressure, dissolved oxygen, pH, turbidity, chlorophyll, seawater flow rate, flow direction parameters, doppler acoustic ocean current information in the seawater.
5. The system of claim 2, wherein the seabed environmental data comprises deformation of seabed topography, temperature, pressure at various points of the seabed, seabed surface seawater methane, carbon dioxide content.
6. The system of claim 2, wherein the downhole environmental data comprises temperature, pressure parameters surrounding the wellhead and wellbore.
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