CN-121995433-A - High-sulfur self-flowing well earthquake comprehensive observation system and application method thereof

CN121995433ACN 121995433 ACN121995433 ACN 121995433ACN-121995433-A

Abstract

The invention relates to the technical field of seismic monitoring, and particularly discloses a high-sulfur self-flowing well seismic comprehensive observation system and a use method thereof. The technical problems that the dynamic water level observation and the blockage of a traditional gas collecting device are affected by the pressure disturbance of a drainage pipeline during the observation of a self-flowing well are solved. The invention comprises a drainage system, a gas collecting system, a water temperature observing device and a dynamic water level observing device, wherein the main drainage pipeline is naturally discharged, a drainage buffer pool is arranged, a flow meter is arranged in a sinking mode, an exhaust pipe is arranged, an auxiliary well pipe is connected with a communicating pipe to avoid air bubble interference, and the gas collecting system adopts a cylindrical or umbrella-shaped natural gas collecting device to be suitable for different gas observations. The invention can improve the data quality and stability of dynamic water level, water temperature and gas observation, further solve the technical problem of blockage of the traditional gas collecting device and enhance the earthquake monitoring capability of the high-sulfur self-flowing well.

Inventors

ZHANG YANAN
ZHU SHIJUN
CHEN LIYI
SUN XIAORU
HUANG YONGHUI
CHEN YUXUAN
ZHU GUANGYU
Hua Peixue

Assignees

北京市地震局

Dates

Publication Date: 20260508
Application Date: 20260129

Claims (10)

1. The high-sulfur self-flowing well earthquake comprehensive observation system is characterized by comprising a drainage system, a gas collecting system, a water temperature observation device and a dynamic water level observation device; The drainage system comprises a main drainage pipeline, a flowmeter (1), a drainage buffer pool (3), a manual sampling port (4) and an auxiliary well pipe (5), wherein the elevation of the tail end of the main drainage pipeline is not higher than the elevation of a flow control valve (6), the drainage buffer pool (3) is arranged at the outlet of the main drainage pipeline, and the bottom of the drainage buffer pool is connected with a buried pipeline for outward discharge; The gas collecting system comprises a gas observing device (2) which is used for monitoring the dynamic water level of the gravity flow well.
2. The high-sulfur self-flowing well earthquake comprehensive observation system of claim 1 is characterized in that the flowmeter (1) is arranged on a main drainage pipeline in a sinking mode, an exhaust pipe (9) is arranged in front of the flowmeter (1), a valve (10) capable of cutting off water flow and a bypass pipeline (11) are arranged on the main drainage pipeline corresponding to the flowmeter (1), and the manual sampling port (4) is kept in a long-flowing water state and is provided with a corrosion-resistant valve.
3. The high-sulfur self-flowing well earthquake comprehensive observation system according to claim 1, wherein the dynamic water level observation device comprises a water level sensor (12), the water level sensor (12) is arranged in a secondary well pipe (5), the secondary well pipe (5) is communicated with a main well pipe (7) through a communicating pipe, the height of the communicating pipe is lower than that of a main drainage pipeline, the water temperature observation device comprises a water temperature sensor (13), and the water temperature sensor (13) is arranged in the main well pipe (7).
4. The high sulfur self-flowing well earthquake comprehensive observation system according to claim 1, wherein the gas observation device (2) comprises a natural gas collecting device, and the natural gas collecting device comprises a cylindrical gas collecting device (14) and an umbrella-shaped gas collecting device (15); when observing the mercury gas, a cylindrical gas collecting device is adopted and is arranged in an open environment above the water surface in the well hole; when observing hydrogen or helium, a cylindrical gas collecting device is adopted and is arranged below the water surface in the well hole; when observing gas radon, an umbrella-shaped gas collecting device is adopted and is arranged in an open environment above the water surface of the drainage buffer pool.
5. The high-sulfur self-flowing well earthquake comprehensive observation system of claim 1, wherein the distance between the auxiliary well pipe (5) and the main well pipe (7) is 1-2 meters, the auxiliary well pipe is communicated with the main well pipe (7) through a communicating pipe, when bubbles in well water escape, the communicating pipe is an inclined communicating pipe (16), the inclination angle is 10-45 degrees, and when no bubbles in well water escape, the communicating pipe is a horizontal communicating pipe.
6. The high sulfur self-flowing well seismic integrated observation system of claim 1, wherein if the system comprises a traditional gas collecting device, the traditional gas collecting device can comprise a gas collecting pipeline branch, the gas collecting pipeline branch interface is positioned below the main drainage pipeline, and a valve of the gas collecting pipeline branch is made of a corrosion-resistant material and does not adopt a pure copper ball valve.
7. The high-sulfur self-flowing well earthquake comprehensive observation system according to claim 1 is characterized in that an instrument signal wire (17) is connected to the upper portion of the water temperature sensor (13) and used for transmitting water temperature data to external equipment, and an instrument gas path interface (18) is arranged on the cylindrical gas collecting device (14) and used for transmitting collected gas to the external equipment.
8. The high-sulfur self-flowing well earthquake comprehensive observation system according to claim 1, wherein a pressure measuring pipe (19) is arranged on the left side of the flow control valve (6) and used for measuring the pressure in a pipeline, and an exhaust pipe (9) in front of the flowmeter (1) is used for exhausting the escaping gas in the pipeline.
9. The high-sulfur self-flowing well earthquake comprehensive observation system according to claim 1, wherein the cylindrical gas collecting device (14) comprises a stainless steel main pipe (20), a stainless steel filter screen (21) and an external wire stainless steel pipe (22), and the stainless steel filter screen (21) and the stainless steel main pipe (20) are welded at 30 degrees; The umbrella-shaped gas collecting device (15) comprises a stainless steel gas collecting part (23), a stainless steel connecting pipe (24), a drying pipe (25) and a silica gel pipe (26), wherein anhydrous calcium chloride or color-changing silica gel is filled in the drying pipe (25).
10. The high sulfur self-flowing well earthquake comprehensive observation method is characterized by comprising the following steps: S1, naturally draining well water outside a drainage buffer pool (3), ensuring that the tail end of a main drainage pipeline is not higher than the elevation of a flow control valve (6), and avoiding influencing main drainage when the drainage of a buried drain is blocked by utilizing an overflow mechanism; S2, monitoring flow by adopting a sinking type installed flowmeter (1), and arranging an exhaust pipe (9) at the front section of the flowmeter (1); s3, placing a water level sensor (12) in the auxiliary well pipe (5) for dynamic water level observation, communicating the main well pipe (7) with the auxiliary well pipe through a communicating pipe, and selecting a horizontal or inclined communicating pipe (16) according to whether bubbles exist in well water or not; s4, gas observation is carried out by adopting a natural gas collecting device, a cylindrical gas collecting device (14) or an umbrella-shaped gas collecting device (15) is selected according to the gas type, and a corresponding gas collecting environment and a corresponding gas collecting mode are selected.

Description

High-sulfur self-flowing well earthquake comprehensive observation system and application method thereof Technical Field The invention relates to the technical field of seismic monitoring, in particular to a high-sulfur self-flowing well seismic comprehensive observation system. Background The earthquake underground fluid observation comprises physical quantity observation such as water level, water temperature and flow and chemical quantity observation such as radon, mercury, hydrogen, helium, carbon dioxide and the like, and the observation objects include a still water level observation well, a self-flowing observation well, an observation spring and the like. The artesian well is a well hole with a confined aquifer water head higher than a well mouth and water can naturally flow out, the confined aquifer is mostly from deep underground water, the water temperature is higher, the gas and trace element contents are rich, part of well water has high mineralization degree and high sulfide content, all physical quantity and chemical quantity observations can be carried out, the sensitivity of the observed dynamic water level is higher, the coupling effect of a pressure field, a water field and a temperature field can be synchronously responded, and the application value is higher. However, when the gravity wells are used for comprehensive observation, the observation items have mutual influence and restriction relation, the technical complexity is far higher than that of a common still water well, the rationality of the design of a leakage system and a gas collecting system directly influences the quality of observation data, the hydrogeological background and the physical and chemical properties of the fluid of the gravity wells in different areas are obviously different, the current specifications are difficult to directly guide the construction of a standardized observation system, and the specific technical design is needed. Disclosure of Invention The invention aims to provide a high-sulfur self-flowing well earthquake comprehensive observation system capable of solving the problems and a use method thereof. In order to achieve the above purpose, the present invention provides the following technical solutions: preferably, the system comprises a drainage system, a gas collecting system, a water temperature observation device and a dynamic water level observation device; the drainage system comprises a main drainage pipeline, a flowmeter, a drainage buffer pool, a manual sampling port and an auxiliary well pipe, wherein the elevation of the tail end of the main drainage pipeline is not higher than that of a flow control valve, the drainage buffer pool is arranged at the outlet of the main drainage pipeline, and the bottom of the drainage buffer pool is connected with a buried pipeline for outward discharge; The gas collecting system comprises a gas observing device, and the dynamic water level observing device is used for monitoring the dynamic water level of the gravity flow well. Preferably, the flowmeter is arranged on the main drain pipeline in a sinking mode, an exhaust pipe is arranged in front of the flowmeter, a valve capable of cutting off water flow and a bypass pipeline are arranged on the main drain pipeline corresponding to the flowmeter, the manual sampling port is kept in a long-running water state, and a corrosion-resistant valve is arranged on the manual sampling port. Preferably, the dynamic water level observation device comprises a water level sensor which is arranged in the auxiliary well pipe, the auxiliary well pipe is communicated with the main well pipe through a communicating pipe, the height of the communicating pipe is lower than that of the main drainage pipeline, and the water temperature observation device comprises a water temperature sensor which is arranged in the main well pipe. Preferably, the gas observation device comprises a natural gas collection device, and the natural gas collection device comprises a cylindrical gas collection device and an umbrella-shaped gas collection device; when observing the mercury gas, a cylindrical gas collecting device is adopted and is arranged in an open environment above the water surface in the well hole; when observing hydrogen or helium, a cylindrical gas collecting device is adopted and is arranged below the water surface in the well hole; when observing gas radon, an umbrella-shaped gas collecting device is adopted and is arranged in an open environment above the water surface of the drainage buffer pool. Preferably, the distance between the auxiliary well pipe and the main well pipe is 1-2 meters, the auxiliary well pipe and the main well pipe are communicated through a communicating pipe, when bubbles in well water escape, the communicating pipe is an inclined communicating pipe, the inclination angle is 10-45 degrees, and when no bubbles in well water escape, the communicating pipe is a horizontal communicating pipe. Prefera