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DBT70-2018: (Earthquake observation anomaly field verification report preparation underground fluid)
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(Earthquake observation anomaly field verification report preparation underground fluid)
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DB/T 70-2018
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Basic data | Standard ID | DB/T 70-2018 (DB/T70-2018) | | Description (Translated English) | (Earthquake observation anomaly field verification report preparation underground fluid) | | Sector / Industry | Chinese Industry Standard (Recommended) | | Classification of Chinese Standard | P15 | | Word Count Estimation | 13,179 | | Date of Issue | 2018-12-26 | | Date of Implementation | 2019-03-01 | | Regulation (derived from) | China Earthquake Administration Announcement (2018.12.26) | | Issuing agency(ies) | China Earthquake Administration | DBT70-2018: (Earthquake observation anomaly field verification report preparation underground fluid)
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Report writing specifications for the field verification of observed seismic anomaly-underground fluid
ICS 91.120.25
P 15
Record number. DB
People's Republic of China Earthquake Industry Standard
Compilation of on-site verification report of abnormal seismic observation
Underground fluid
2018-12-3
2018 -12-26 release
2019-03-01 implementation
Issued by China Earthquake Administration
Table of contents
Foreword...
introduction...
1 Scope...1
2 Normative references...1
3 Basic regulations...1
4 Outline of on-site verification report...1
Appendix A (Normative Appendix) Requirements for the format of the on-site verification report...7
Appendix B (Normative Appendix) Requirements for on-site verification work plan compilation...8
Appendix C (Normative Appendix) On-site verification work plan audit form format...9
Foreword
This standard is one of the series of standards in the "Compilation of Site Verification Report for Seismic Observation Anomalies". The standard structure and name of the series are expected to be as follows.
- Compile geomagnetism on site verification report of abnormal seismic observation
-Earthquake observation anomaly site verification report compilation
--- Compilation of an on-site verification report for seismic observation anomalies
- Compile crustal deformation on site verification report of abnormal seismic observation
--- Compile underground fluids on site verification report of abnormal seismic observation
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation".
This standard was proposed by the China Earthquake Administration.
This standard is under the jurisdiction of the Earthquake Monitoring and Prediction Standardization Technical Committee.
Drafting organizations of this standard. Institute of Crustal Stress, China Earthquake Administration, China Seismological Network Center, Institute of Earthquake Prediction, China Earthquake Administration,
Earthquake Administration of Shanxi Province, Earthquake Administration of Anhui Province.
The main drafters of this standard. Liu Yaowei, Gao Xiaoqi, Sun Xiaolong, Yan Rui, Li Ying, Zhang Lei, Fan Xuefang, Wang Jun, Yang Pengtao, Ren Hong
Wei, Guo Lishuang, Zhang Bin, Bao Chuang.
Introduction
Anomalies in seismic observations need to be verified on site, and an on-site verification report should be compiled, which is part of the on-site verification of seismic observation anomalies
Important output, and its results provide an important basis for earthquake situation tracking and earthquake trend determination. After years of practice, the seismic observations of subsurface fluids
Often on-site verification work has established scientific and standardized analysis methods and working procedures. To standardize the on-site verification of anomalies in underground fluid seismic observation
The preparation of the report is to improve the standardization level of earthquake analysis and prediction. It is necessary to carry out the contents and format of the field verification report.
Specific provisions.
This standard is based on the foundation of the on-site verification of anomalous observations of underground fluids in my country, as well as the analysis and analysis of on-site verification reports over the years.
In summary, the basic requirements, content and format for the compilation of the on-site verification report of anomalous observations of underground fluids are stipulated.
The standardization of earthquake analysis and forecasting has played a positive role.
Compilation of on-site verification report of abnormal seismic observation
Underground fluid
1 Scope
This standard specifies the technical requirements for the compilation of the on-site verification report of anomalous observations of underground fluids.
This standard is applicable to the compilation of the on-site verification report for the anomaly of underground fluid seismic observation.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 7714-2015 Information and literature reference description rules
GB/T 19531.4-2004 Technical requirements for the observation environment of seismic stations Part 4.Subsurface fluid observation
DB/T 3 Seismic survey item classification and code
DB/T 48-2012 Seismic Underground Fluid Observation Method Well Water Level Observation
DB/T 49-2012 Seismic underground fluid observation method Well water and spring water temperature observation
DB/T 50-2012 Seismic underground fluid observation method Well water and spring water flow observation
3 Basic regulations
3.1 When there are deviations from normal changes in the seismic observation of underground fluids, on-site verification work should be carried out and on-site verification reports should be prepared.
3.2 The underground fluid measurement items are classified according to the regulations in DB/T 3.
3.3 On-site verification of macro-abnormalities shall be part of the content of the on-site verification report.
3.4 Legal measurement units and symbols should be used in the on-site verification report.
3.5 Observations of static water level (buried depth of water level) and dynamic water level (relative water head height) in the drawings of the site verification report shall be expressed in absolute values.
An upward graph indicates a rise in the water level, and a downward graph indicates a decrease in the water level. A graph without special requirements, the graph upwards means the measured value increases,
The downward curve of the graph indicates that the measured value decreases.
3.6 See Appendix A for the format requirements of the on-site verification report.
4 Outline of on-site verification report
4.1 Elements of the on-site verification report
The on-site verification report consists of four parts. cover, table of contents, main text and appendix. The main text includes overview, abnormal investigation, analysis and conclusion,
There are five parts in the postscript and references, and the appendix includes on-site verification work plan and on-site verification work plan review form. Table 1 shows the on-site verification
The basic elements of the report.
4.2 Cover and Table of Contents
4.2.1 The cover includes the name of the site verification report, completion unit and completion time.
4.2.2 The name of the on-site verification report for a single test item shall consist of "abnormal verification-", the start date of the on-site verification work, and the province (autonomous region, municipality directly under the Central Government)
The abbreviation, station name, and test item name are composed of the abbreviation, the on-site verification work start date is expressed in long date format..
Example. Anomaly verification-December 15,.2016 Anhui Lujiang River water radon.
4.2.3 The name of the synchronous on-site verification report for multiple locations of the same measurement item is composed of "abnormal verification-", the start date of on-site verification, and the location
The province (autonomous region, municipality directly under the Central Government) or the abbreviation of the region where it is located, the station name and the name of the measurement item, the on-site verification work start date is a long date
Format representation.
Example. Abnormal verification-water level in East China on August 13,.2017.
4.2.4 The name of the on-site verification report for the synchronization of different measurement items at the same observation point consists of "abnormal verification-", the start date of on-site verification, and the location
The abbreviation of the province (autonomous region, municipality directly under the Central Government), the station name and the name of the measurement item are composed, and the start date of the on-site verification work is expressed in long date format.
Example. Abnormal verification-June 5,.2018, Huangmei Dushantai, Hubei.
4.2.5 The completion unit shall be the name of the second-level unit of the provincial seismic authority.
Example. Analysis and Prediction Center of Earthquake Administration of Anhui Province (or Monitoring Center of Earthquake Administration of Anhui Province; or Lujiang Seismic Station of Earthquake Administration of Anhui Province).
4.2.6 The table of contents includes the chapter titles of the text of the site verification report and attachments.
4.3 Overview
4.3.1 Content composition
The overview part should include an overview of anomalies and verification work, regional background information, and an overview of observations at the station and surrounding areas.
4.3.2 Overview of exceptions and verification work
4.3.2.1 The abnormality overview shall include three parts. the process of discovering abnormal events, the abnormal characteristics and the overview of the on-site verification work plan.
4.3.2.2 The process of discovering abnormal events should include the personnel, units, time, and location of the abnormal events.
4.3.2.3 The description of abnormal characteristics shall include the location, duration, range of change, scope and other relevant characteristics of the abnormal phenomenon, such
Abnormal historical occurrences, etc., with relevant drawings or sketches.
4.3.2.4 The overview of the on-site verification work plan should include the person in charge of the on-site verification, the participants and the on-site verification procedures.
4.3.3 Regional background information
Introduce background information related to this anomaly analysis, including the following.
a) Geological structure and landform. Including the location of the structure, the distribution characteristics of the main faults, the stratum profile and the topography, etc.;
b) Hydrogeological conditions. Including aquifer lithology, age, thickness and distribution, main groundwater exploitation horizon, groundwater replenishment area and
The location of the discharge area, the groundwater flow direction and the dynamic characteristics of the groundwater level in the area;
c) Surface water conditions. Including the locations of seas, rivers, lakes, reservoirs, and irrigation areas near abnormal points;
d) Regional meteorological conditions. Including precipitation, temperature, air pressure, etc.
4.3.4 Overview of station and surrounding observations
Describe the observational overview of stations and surrounding areas related to this anomaly analysis, including the following.
a) Basic parameters of observation wells. Including the latitude and longitude of the well point, altitude, administrative territory, well depth, well diameter, casing parameter material and depth
And the change of diameter, the water stop, the type of cross section and the location of the observed aquifer, etc.;
b) Observe the basic parameters of the aquifer. Including the exposed thickness of the observation layer, unit water influx, water conductivity, permeability, water storage coefficient, etc.;
c) Basic overview of the observation spring. Including hydrogeology, exposure conditions, spring water temperature, spring water flow and spring water type. Types of spring water follow
The properties of aquifers can be divided into rising springs and descending springs. According to the cause of exposure, they are divided into erosion springs, contact springs, overflow springs, fault springs, and
Contact with spring
d) Hydrogeochemical characteristics. Well (spring) water chemistry type, main gas component content (CO2, CH4, H2S, etc.), total dissolved
Solve the solid, if the above information is missing, it must be noted;
e) Water temperature gradient. Attached is a graph of the change of water temperature with depth, and a brief description of the characteristics of the heat source recharge of the observed aquifer based on the graph of the change of water temperature with depth;
f) Introduction to the station observation system. Including all measurement item types, observation well devices, observation instruments, instrument technical indicators, starting point
Observation time and observation log, etc.;
g) Introduction of historical information of the station. Including the situation of the observers, the changes of the measuring points, the evaluation of the effectiveness of the observation data, etc.;
h) Observation well and well (spring) head device modification experience;
i) Observation of the gas path modification experience and the gas path affected by temperature changes;
j) Peripheral observation items and changes related to anomaly analysis.
4.4 Anomaly investigation
4.4.1 Content composition
Anomaly investigation should include three parts. preliminary determination of anomalies, inspection of observation systems, and investigation of environmental factors.
4.4.2 Preliminary judgment of abnormality
4.4.2.1 Briefly describe several pre-determination situations of the cause of the abnormality, and conduct a preliminary analysis of the reliability of the abnormality.
4.4.2.2 According to the pre-judgment of the abnormal cause, briefly describe the analysis basis to be obtained and the technical measures to be taken.
4.4.3 Inspection of Observation System
4.4.3.1 Describe the inspection status of the observation system for measurement items such as well water level, well water flow and spring water flow, well water temperature, spring water temperature, and ground temperature,
Include the following.
a) The working status of observation instruments and data acquisition equipment;
b) The working status of power supply equipment and lightning protection equipment;
c) Changes in wellhead devices, probe cable fixing devices, valve switches, discharge port devices, etc.;
d) For the calibration of water level observations, see Appendix C in DB/T 48-2012; give the accuracy of observations;
e) For the calibration and measurement of the observed value of water flow in the well (spring), see Chapter 7 of DB/T 50-2012; the accuracy of the observation is given
condition;
f) When there is a pump in the observation well (spring), describe whether the pump has leakage and clarify the analysis result;
g) Consistency of water temperature in comparison wells (springs) of the same type of instruments;
h) The observation system is affected by other factors.
4.4.3.2 Describe the inspection status of the observation system for the measurement items of radon, mercury, hydrogen, helium, carbon dioxide, gas volume, ion concentration, etc., including
The following.
a) Observing instrument working and power supply status;
b) The calibration of the instrument using standard materials or standard delivery methods;
c) Automatic observation items, describing the status and changes of lightning protection, data mining equipment, wellhead devices, water circuits, gas circuits and degassing devices;
d) Manual observation items, describing whether sampling and testing are standardized, whether personnel changes, whether calculation results are correct, etc.;
e) When auxiliary chemical reagents are used in the observation method, the validity period, effectiveness and contamination of the reagents should be described;
f) Other factors that affect changes in observation data;
g) Parallel observations using other instruments of the same type.
4.4.4 Investigation of environmental factors
Describe the environmental factors related to this abnormal analysis, including the following.
a) Data and maps of meteorological factors such as temperature, pressure and precipitation that may be related to the anomaly;
b) The area and time of the surrounding construction operations, the time and water volume data of pumping or water injection, and the spatial location map of the abnormal observation point;
c) Water storage and release time and water volume data of surrounding rivers, reservoirs, and canals, and their spatial relationships with abnormal observation points;
d) Other influencing factors related to abnormal observations, such as geology, hydrogeological conditions, and oil well production in the well area.
4.5 Analysis and conclusion
4.5.1 Content composition
Anomaly analysis and conclusions include anomaly analysis, anomaly determination and conclusions and recommendations.
4.5.2 Abnormal analysis
4.5.2.1 Anomaly analysis includes physical experiment and chemical experiment process, physical experiment data and chemical experiment data analysis process, auxiliary analysis
process.
4.5.2.2 Describe the physical experiment process related to this abnormal analysis, including the following.
a) Downhole TV observes the analysis process of the wellbore structure, such as whether there are cracks, blockages and collapses in the well wall;
b) The investigation and analysis process of pumping experiments in other wells related to abnormal wells, such as changes in basic parameters of aquifers, radius of influence of pumping, and pumping
The degree of interference to abnormal wells, etc.;
c) The comparative observation and analysis process of the same type of water level instruments, and the conclusion of whether the abnormal water level measured value change is true or not is given;
d) Consensus analysis process and results of comparative observation of water temperature instruments of the same depth and type;
e) The observation data analysis process of well water temperature changes with depth, and the nature of the heat source of abnormal water temperature is given. For lack of well water temperature changes with depth
For observation wells with data, relevant data should be supplemented in accordance with the technical requirements of DB/T 49-2012 Appendix A;
f) The analysis process of gas abnormal phenomena at the wellhead, and the gas escape position in the wellbore is given;
g) The analysis process and results of other physical experiments related to anomalies.
4.5.2.3 Describe the chemical experiment process related to this abnormal analysis, including the following.
a) Sampling process of water and gas samples related to abnormal wells (springs), with sampling quantity, sampling location and sampling time;
b) Surface water (river, river, lake, sea, reservoir, etc.) and groundwater samples and gas samples within a certain range from abnormal wells (springs)
Sample process, give the number of samples, sample location and sample time. The range of sampling points should comply with GB/T 19531.4-2004
Requirements in Chapter 5.
c) The on-site test process of water temperature, pH and conductivity, and the measurement data is given;
d) Test process of the content of major elements and trace elements in water samples, and give experimental data;
e) The test process of the component content and component characteristics in the gas sample, and the experimental data is given. The gas components mainly include Rn, Hg, CO2, H2,
O2, CH4, He, etc.;
f) Test process of isotopes in water and gas samples, and give experimental data. The isotopes tested in water samples mainly include. 18O, 2H, 3H
The isotopes tested in the gas sample mainly include. 13C, 3He/4He, 4He/20Ne, etc.;
g) The measurement process of the cross-fault soil gas observation profile related to the abnormal observation point, and the measurement data is given. Soil gas components mainly include
Rn, CO2, Hg, H2, etc.;
h) Other chemical experiment analysis processes and results related to abnormalities.
4.5.2.4 Describe the physical experiment data analysis process related to this abnormal analysis, including the following.
a) Correlation analysis process of well water level and meteorological factors such as rainfall, temperature, air pressure, etc., giving the influence of meteorological factors on well water level dynamics
Degree results, describing the normal dynamic characteristics of the well water level;
b) Use the harmonic analysis method to extract the analysis process of the well water level solid tide factor M2 and the phase difference, and give the calculated aquifer
Basic parameters, describing the changing state of aquifer media;
c) Based on basic data such as regional hydrogeological conditions and seismic geological structure, give the establishment of a wellbore aquifer groundwater dynamic model
Process, and the formation mechanism of groundwater balance or tectonic mechanism of abnormal groundwater level;
d) According to the wellbore water temperature change curve with depth, combined with the geological structure and wellbore conditions, the process of establishing the water-thermodynamic model is given.
And the cause mechanism of abnormal well water temperature;
e) Data analysis process and results of other physical processes related to this anomaly.
4.5.2.5 Describe the chemical experiment data analysis process related to this abnormal analysis, including the following.
a) Hydrogeochemical characteristics such as groundwater origin and recharge type. The main content includes. Piper chart to characterize water quality, characterization
The Giggenbach triangle diagram of the degree of water-rock reaction, which characterizes the source of groundwater replenishment and the hydrogen and oxygen stable isotope pair
Comparison diagram; description of groundwater runoff process based on groundwater age analysis; description of groundwater analysis based on hydrochemical temperature scale method
Heat storage depth and temperature process and results formed;
b) Based on data such as electrical conductivity, total dissolved solids, ion composition, stable isotopes of hydrogen and oxygen, and groundwater age, give analysis of groundwater
The process and results of the mixing degree of the deep and shallow parts;
c) Based on the measurement data of cross-fault soil gas components, give the characteristics of underground gas release and fault activity status of the fault at the observation point
Analysis result;
d) Data analysis process and results of other chemical experiments related to this anomaly.
4.5.2.6 Auxiliary analysis process and results of other geophysical observation data that may be related to this anomaly.
4.5.3 Abnormal judgment
4.5.3.1 The abnormality determination results are divided into three types. abnormality of structural activity, abnormality of interference and abnormality to be determined.
4.5.3.2 Abnormal tectonic activity
a) Describe the analysis process that is judged to be the abnormality of the tectonic activity and give the abnormality reliability;
b) Based on the previous comparative analysis results of similar abnormalities and abnormal features, the reliability of abnormalities is characterized as. Type A anomaly, Type B anomaly or Type C
abnormal;
c) During the time period of observational data analysis, based on the results of the observational data forecasting effectiveness evaluation, the observational curve is normally dynamic and stable and predictive
The performance is excellent, the reliability of the abnormality is type A, the observation curve is normal and dynamic and stable, and the prediction performance is good, and the reliability of the abnormality is type B
Usually, the observation curve is normal and dynamic and unstable and the prediction efficiency is poor, and the reliability of the abnormality is type C abnormal;
d) The abnormal expression method for predicting the earthquake time can be given based on the earthquake prediction index. The anomaly whose prediction time is above one year scale is
Background anomalies. Anomalies predicted within three months are short-term anomalies, and anomalies predicted within 10 days are imminent.
often.
4.5.3.3 Abnormal interference
Describe the similar interference situation at this measuring point or similar interference situation at other measuring points in history, and express the analysis process that judged as interference abnormality,
4.5.3.4 Anomalies to be determined
Describe the reason why the nature of the abnormality cannot be determined, and state other content that needs to be explained.
4.5.4 Conclusions and recommendations
4.5.4.1 Describe the definitive conclusion. For opinions that are inconsistent with the judgment conclusion, describe the main basis and relevant circumstances.
4.5.4.2 If it is an abnormality to be determined, further work recommendations should be stated, including work content, technical measures and condition guarantees
Content etc.
4.5.4.3 The problems and understandings existing in the on-site verification should b...
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