Natural Gas Hydrate Exploitation Simulation System
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Solution Overview
Problem
Current natural gas hydrate experimental simulation devices primarily focus on hydrate accumulation and decomposition, lacking comprehensive simulation of the continuous processes involved in drilling and gas collection, which complicates the development of efficient and economical exploitation technologies due to the complexity and deep-buried nature of hydrate reservoirs.
Innovation Solution
A simulation system and method that integrate hydrate accumulation, formation drilling, exploitation, and gas collection processes, utilizing a high-pressure reaction kettle, drilling simulation subsystem, and gas processing subsystem to mimic the entire natural gas hydrate exploitation process, including a hydrate formation drilling simulation subsystem and produced gas collecting and processing simulation subsystem.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If field tests are conducted to test the comprehensive effect of multiple process parameters, then the exploitation process can be evaluated, but the test method is not completely ideal, economical andscientific due to invisibility and complexity of the hydrate exploitation process and inability to directly measure underground formation parameters
Solution Approach 1:
The patent creates a physical model system that copies the natural hydrate exploitation process. The model includes a model hydrate accumulation layer, model drilling system, and model exploitation system that replicate underground conditions in a controllable laboratory environment, allowing comprehensive parameter testing without actual field tests
Solution Approach 2:
The complex exploitation process is segmented into distinct functional modules: hydrate accumulation module, drilling module, exploitation module, and gas collection module. Each module can be independently controlled and tested, simplifying the overall system while maintaining comprehensive evaluation capability
2Adaptability or versatility
If existing simulation devices are used that mainly involve accumulation and decomposition of hydrate, then hydrate formation can be studied, but the devices lack researches on drilling process and produced gas collection
Solution Approach 1:
The simulation device is designed as a multi-functional integrated system that can perform accumulation, drilling, exploitation, and gas collection functions within a single unified platform. The model hydrate accumulation layer serves as a common foundation for all subsequent operations, and the system can transition between different operational modes
3Ease of operation
If the in situ hydrate synthesis, the drilling process, the exploitation process and the produced gas collection process are separated for single researches, then each process can be studied individually, but the research requirements of developing an economical and efficient hydrate exploitation technology are hard to satisfy
Solution Approach 1:
The patent merges all exploitation processes into a continuous integrated workflow. The model drilling system creates boreholes that directly connect to the model hydrate accumulation layer, and the model exploitation system immediately follows to extract gas, with produced gas collection completing the chain. This maintains the natural sequence and interactions of the actual exploitation process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables comprehensive evaluation of the natural gas hydrate exploitation process, providing guidance for more effective and efficient hydrate development by simulating the entire process under controlled conditions, enhancing our understanding of hydrate formation, drilling, and gas collection.
Implementation Method 1
Based on such special characteristics of the natural gas hydrate as lower temperature, higher pressure, complicated decomposition phase change process
Implementation Method 2
heating tank (11) for heating the produced gas-water mixture
Implementation Method 3
gas-liquid separator (30) for separating the produced gas-water mixture
Data Source
AI summary
A simulation device of an entire natural gas hydrate exploitation process includes a high pressure reaction kettle, a gas-liquid separation device, a hydrate accumulation simulation subsystem simulating a hydrate accumulation process, a hydrate formation drilling simulation subsystem simulating a hydrate formation drilling process, a hydrate exploitation simulation subsystem simulating a hydrate decomposition and gas production process, and a produced gas collecting and processing simulation subsystem simulating a produced gas collecting and processing process. A method for simulating an entire natural gas hydrate exploitation process includes a hydrate accumulation process, a hydrate formation drilling process, a hydrate exploitation process and a produced gas collecting and processing process. With this simulation device and method, the external environment can be truly simulated, so that the authenticity and accuracy are better, and the entire natural gas hydrate exploitation process is continuously simulated and comprehensively evaluated to provide guidance for natural gas hydrate exploitation.