SY/T 10016-1998 Technical specification for offshore towed 3D seismic data acquisition
Some standard content:
ICS75.020
Registration No.: 1988—1998
People's Republic of China Offshore Oil and Gas Industry Standard SY/T10016---1998
Offshore Towing 3-D Seismic
Technical Specifications for Marine Towing 3-D Seismic Data Acquisition1998-07-20 Issued
China National Offshore Oil Corporation
1999—03—01 Implementation
SY/T 10016—1998
1 Scope
2 Definition of terms
Preparation before operation
4 Dual-source multi-cable configuration requirements
5 Implementation 1 Technical requirements
6 Product evaluation
Appendix A (Standard Appendix)
Seismic source gun standard...
Appendix B (Standard Appendix)
Anti-recording ((Suggestive Appendix)
"Operation construction report\Content·
"Instrument record shift report\Content
Remove recording [(Suggestive Appendix)|| tt||Reference coverage standard.·
SY/T10016—1998
In recent years, due to the upgrading of equipment and the rapid development of operation methods, the original towed cable single-source 3D seismic data acquisition operation has developed into towed dual-source multi-system operation. With the application of the underwater positioning system, many new contents have been added, and the breadth and depth of technical requirements have undergone profound changes. The original SY5295-1991 "Technical Specifications for Deepwater Petroleum Seismic Data Acquisition" and Q/CXYGCT101.03-1995 "Technical Specifications for Deepwater Petroleum Seismic Data Acquisition" have been revised. The Technical Standard for Seismic Data Acquisition can no longer fully meet the operational needs. Therefore, this regulation is specially formulated to standardize the technical management of field operations.
Compared with the original standard, the main technical indicators added and modified in this standard are as follows: a) The introduction of the source gun standard, the improvement of working pressure, synchronization indicators and the increase of monitoring equipment, and the provisions for double-source alternating blasting; 1) Requirements for the wing angle of the depth controller (bird) in cable balance; c) Requirements for on-site quality control and processing systems; d) Cable, underwater positioning system configuration requirements for the source, cable spacing, source spacing and cable-source spacing. e) Technical requirements for safety, communication, escort ships and other equipment: This standard shall be implemented from March 1, 1999. From March 1, 1999, all offshore towed-type seismic data acquisition equipment shall comply with the provisions of this standard;
Appendix A and Appendix B of this standard are standard appendices: Appendix C and Appendix D of this standard are reminder appendices. This standard is formulated and managed by China National Offshore Oil Corporation. The drafting unit of this standard is China Offshore Shichong Geophysical Exploration Company. The main drafters of this standard are Xu Guangxiou, Cao Zhanquan, Yang Siqin, Shao Qiqun. The reviewer of this standard is Wang Yunfeng.
Policy Statement
Offshore oil and gas industry standard publications are only for general issues. When it comes to specific situations, national and local laws and regulations should be consulted.
Offshore oil and gas industry standards publications do not assume any responsibility for users, manufacturers or suppliers to provide advance notice and training on health, safety and hazard prevention for their employees and other on-site operators, nor do they assume any responsibility under national and local regulations. The content of any offshore oil and gas industry standards publication cannot be interpreted, implicitly or otherwise, as granting any right to manufacture, sell or use any method, equipment or product involving patent rights, nor does it assume any responsibility for any person who infringes patent rights. Generally, offshore oil and gas industry standards are reviewed, revised, re-identified or revoked at least every five years. Sometimes, this review cycle can be extended by one year, but not more than two years. Therefore, the validity period of the publication shall not exceed five years from the date of publication, unless an extension of validity is authorized. The status of publications can be obtained from the Secretariat of the Offshore Oil and Gas Industry Standardization Technical Committee (Tel. 010-64610022-7875, mailing address: Standardization Office, Offshore Oil Production Research Center, Box 235, Beijing, 101149) or the Offshore Oil and Gas Industry Standardization Technical Committee (Tel. 010-64665361, mailing address: Beijing 100027).
Offshore Oil Science and Technology Office, 25th Floor, Dongjingxin Building, Sanyuanqiao, 100027, China. The purpose of publishing offshore oil and gas industry standards is to promote proven and good engineering techniques and operating practices. It is not intended to eliminate the need to make correct judgments on when and where to apply these techniques and practices. The formulation and publication of offshore oil and gas industry standards are not intended to restrict anyone from adopting any other techniques and practices in any way. This standard is available for use by anyone who wishes to adopt it. The Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units have made unremitting efforts to ensure the accuracy and reliability of the data contained therein. However, the Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units do not represent, guarantee or warrant the standards they publish, and hereby expressly state that the Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units do not bear any obligation or responsibility for the loss or damage caused by the use of these standards, for the use of standards that may conflict with any national and local regulations, and for the consequences of infringement of any patent rights caused by the use of these standards.
Offshore Oil and Gas Industry Standards of the People's Republic of China Technical Specifications for Marine Towing 3-D Seismic Data Acquisition1Scope
SY/T10016—1998
This standard specifies the general requirements for parameters and quality control technical indicators of towed 3-D seismic data acquisition operations. This standard applies to the implementation of offshore towed 3-D seismic data acquisition operations. It can be used as a reference for high-resolution 3-D seismic data acquisition operations.
2 Definition of terms
2.1 Feather angle
The angle between the average azimuth of the cable (or the azimuth of the tail mark) and the azimuth of the designed survey line. 2.2 Abnormal channel
Any channel that falls into any of the following conditions is an abnormal channel: a) A non-working channel or an intermittent working channel,
The noise of the strange jump channel is greater than 1:0Pa (10bar); b)
Polarity reversal channel;
The leakage or insulation resistance
is less than 1.0MQ
The average amplitude is compared with the adjacent channel, and the decrease is more than 6dBe)
2.3 Empty and waste guns
Any channel that falls into the following conditions is an empty and waste gun
No valid data is recorded:
No explosion Explosion signal:
Gun self-excitation;
Source synchronization error is greater than ±1ms;
Tape reel number or survey line number does not match the shift report and cannot be verified: there is a record of induction;
No positioning data or records of unqualified positioning data 3 Preparation before operation
3.1 Data preparation
3.1.1 Feasibility study report on seismic acquisition project and acquisition parameters and construction plan demonstration report 3.1.2
Construction design drawings
3.1.3 Ellipsoid and projection parameters,
Pre-survey line drawing and data table.
Meteorological, topographical and ocean current characteristics and fishing activities in the work area 3.1.5
Approved by China National Offshore Oil Corporation on July 20, 1998 and implemented on March 1, 1999
SY/T10016:1998
3.1.6 Various necessary and valid ship registration and navigation certificates, safety and health and environmental certificates, operation permits, personnel allocation and work permits are still required 3.2 Preparation and basic requirements of equipment and spare parts 3.2.1 Recording instruments (pool seismic instruments, tape drives and copiers) should complete monthly inspections and keep records. 3.2.2 Static calibration of electric compasses, lasers and compasses should meet factory specifications: 3.2.3 Depth sounders, multi-channel monitors, oscilloscopes and various printers and plotters should meet the requirements of the operation. 3.2.4 Cables (lead, elastic section, working section), digital packages, compass birds/depth sensors/depth setters, acoustic birds, laser systems, tail markers and tail marker positioning systems (RGPS) are configured according to the operation requirements, and no less than 30% of the spare quantity. 3.2.5 Sources (H machine, gun cable winch, gun cable, air gun, controller, acoustic bird, laser, RGS. Depth sensor and pressure sensor) are configured according to the needs of the parts industry, and there are sufficient spare parts for air guns. 3.2.6 On-site quality control and processing systems should meet the operation requirements, 3.2.7 The main and auxiliary positioning and navigation systems should meet the operational requirements and be able to operate normally online with the integrated navigation system. 3.2.8 Instruments and meters used by ships have specifications. 3.2.9 Communication equipment (telephone, fax, data transmission equipment and radio station) should be configured according to operational requirements. 3.2.10 Sea 1 supply and desalination equipment should meet operational requirements. 3.2.11 The performance of the expansion ship should meet operational requirements (ship speed greater than 10kn, endurance greater than 30d and wind and wave resistance greater than level 8), with qualified communication equipment for communication with the mother ship and various valid certificates. 3.3 Cable balance
3.3.1 The wing angle of the cable depth controller (wing) is within 3°; the two birds at the front of the cable and the two birds at the tail can be within 15°. 3.3.2 Obtain auxiliary parameters (water speed, minimum offset, distance between cables, distance between energy and cable, distance between sources and sub-arrays), and draw the configuration diagram of the source, cable and positioning network. 4 Dual-source multi-cable configuration requirements
4.1 Configuration on the cable
4.1.1 Each cable shall have at least two water channels, the first one close to the nearest receiving channel, and the second one at least 150 meters behind the first one. 4.1.2 Each cable shall be equipped with at least one depth sensor/compass bird every 300 meters. The first compass island shall be placed within 25 meters of the nearest channel to the ship, and the last compass bird shall be placed within 25 meters of the farthest channel. The distance between the two compass islands closest to the stern and the two pairs of compasses close to the stern marker should not be greater than 100 meters.
4.1.3 A stern marker with RGPS shall be configured at the tail of each cable. 4.2 Source configuration
4.2.1 Each subarray of each source shall be equipped with at least one depth sensor and one pressure sensor. The depth sensors shall be placed at the front and tail of the vessel, and the pressure sensor shall be placed within 4 meters of the maximum capacity marker. 4.2.2 Each seismic source should be equipped with one RCP and at least one acoustic bird. 4.2.3 When each seismic source has two or more sub-arrays (including sub-arrays), at least two laser mirrors should be configured. 4.3 Micro-system network configuration
Dual-source multi-cable operation cables should be equipped with front network and tail network, and middle network when necessary. 4.3.1 The front network consists of two acoustic cloud detectors on the mother ship (preferably on the center line of the bottom of the ship, with a distance of more than 20m), a ship-powered laser scanner, a cable expander microscope, a source laser scope, a cable acoustic bird (each cable should be equipped with at least two acoustic birds), a cable compass, a source acoustic bird and a source RGPS. 4.3.2 The rear network consists of a cable sounder (each cable should be equipped with at least two sounders), a compass bird and an RGPS. 4.3.3 The middle network consists of an acoustic bird (each cable should be equipped with at least two acoustic birds) and a compass bird. 5 Technical requirements for construction 5.1 Operation is not allowed to start. Operation is not allowed to start when any of the following problems exist. ：2
SY/T10016-1998
a) Any item in the monthly inspection of the instrument does not meet the factory standard or the monthly inspection of the instrument is not done within the deadline; b) Instrument II inspection is not qualified:
c) One of the following auxiliary equipment is abnormal:
1) Tape drive, disk drive:
2) Control terminal;
3) Multi-channel monitoring device;
4) Depth sounder;
5) Various printing and drawing equipment:
6) Synchronous system display device;
7) Cable underwater status display device;
8) On-site quality control and processing system:
d) Cable When the working conditions are normal; e) The cable sinking depth deviation is large (F+1m);
The noise level exceeds the following indicators:
Under the premise of the production filter file, its root mean square value exceeds 0.5Pa (5ubar), and in the 6 channels at the front of the cable and the 3 channels at the rear where the depth setter is located, it exceeds 0.81a (8ubar);
g) Configuration that does not meet Chapter 4:
h) 95% of the rated pressure of the air gun "low test force": any gun self-excited;
j) The error of the gun sinking depth exceeds ±1m;
k) The synchronization error of the gun system exceeds =1n1s;
Turn off the gun that does not meet the gun shutdown standard (see the actual Record A source gun shut-off standard); tn)
Guidance navigation system is not correct:
Unable to measure the distance between sources and between sources and cables; n
The error between the distance between sources and the distance between sources and cables is greater than 10% of the design value: p
The distance difference between adjacent cables exceeds the design value by 10% at the head and 20% at the tail; q) One of the two pairs of depth sensors/compass birds at the head and tail of the cable is not working properly. The distance between the middle depth sensor/compass bird is greater than 600m
5.2 Not allowed to continue working
If any of the following problems exist, it is not allowed to continue working: a) The acquisition instrument is faulty;
b) 5,1 b) Situation;
5.1c3)--5) any equipment abnormal time exceeds 60)rrni low one cable abnormal channel is more than 4% of the total number of channels or more than 2 adjacent channels; d)
5.1e) and 5.1) situations occur;
the air gun working force is lower than 90% of the rated pressure for 10 minutes continuously; f)
5.1)--5.11 situations occur:
the main navigation system fails and the auxiliary navigation system cannot replace it: 5,1 m)-5.1a situation;
Continuous empty and waste shots reach 10 shots;
k) There are 20 empty and waste shots in 100 consecutive shots: The cable feather angle exceeds 15 degrees:
Dual sources cannot alternately fire according to regulations:
SY/T10016-1998
n) Less than one cable RGPS is working properly (abnormal RGPS should be repaired within 24 hours); 0) The reliable data of each beam line RGPS is less than 70%, and the acoustic reliable data is less than 60%. 5.3 Others
In addition to the above requirements, attention should also be paid to
that new tapes should be used during production and the tapes should be cleared; a
control;
that one monitoring record should be played back for every 40 shots for each source and cable; that a single-channel profile should be drawn for each common center point (CMP) of each beam line; that a close-channel data body should be made after the end of each cycle area: that the post-processing of positioning on board the ship should at least include: preprocessing, network adjustment and UKOOAP1/90 data output, and necessary on-site quality assurance should be performed. When calculating the number of times the surface element is covered, the valid CMP within the same surface element should comply with the principle of uniqueness of the shot offset. 6 Product evaluation
6.1 Products that should be re-made
Products with any of the following conditions should be re-made: a) The network adjustment residual of the node with a drag mark in the underwater positioning network is greater than 5m, and the major semi-axis of the error circle is greater than 5m; b) The network adjustment of the positioning node not at the drag mark is greater than 3m, and the major semi-axis of the error ellipse is greater than 5m; c) The beam line with less than 80% of the shot points in this range is a waste beam line and should be re-made. 6.2 Products that should be re-shot
Surface elements that do not meet the coverage standard should be re-shot (see Appendix D). Applicable to seismic sources composed of multiple guns.
SY/T10016—1998
Appendix A
(Standard Appendix)
Seismic source gun shutdown standard
A1 When shutting down a broken gun, it is only allowed to be replaced by a spare gun with the same capacity in the array. After turning off one or several guns, the peak-to-peak value (Pi-Pi) is not allowed to be less than 85% of the rated capacity peak-to-peak value (Po-Po). A2
After turning off one or several guns, the bubble ratio (Pi/Bi) is not allowed to be less than 85% of the rated capacity bubble ratio (Po/Bo) cA3
The correlation coefficient between the spectrum after turning off the guns and the spectrum of the original array is greater than 0.98. A4
B1 Operation content
B2 Overview of the work area
SY/T10016-1998
(Appendix to the standard)bZxz.net
Contents of the "Operation and Construction Report"
I. Location of the area, sea conditions, weather, adjacent ports, fishing activities, etc., with a "area location map, construction design survey line grid map, positioning shore station distribution map, and a table of tidal changes in the work area. B3 Equipment profile
Travel status of each professional equipment, what faults occurred during the operation, and what calibrations have been conducted B4 Operation parameters of various professional equipment in construction B4.1 Instrument parameters
Instrument model, sampling rate, recording format, filter characteristics, recording length, number of channels used, and recording density. B4.2 Cable parameters
Number of channels, channel spacing, offset distance, near-shot channel number, sinking depth, total length, installation of depth gauge, water cut channel, number of compass birds, and cable plan,
B4.3 Positioning and navigation parameters
Name, model, shore layout diagram and ship antenna layout geometry and size of main and auxiliary navigation systems, layout diagram and number of sensors of various underwater positioning systems (including RGPS, laser, acoustic, etc.). B4.4 Source parameters
Total volume of array medium, working pressure, sinking depth, and array combination layout diagram and source sub-wave and spectrum diagram B5 Quality analysis and problems
Attached with time analysis statistics table
B7 Attached with operation quality statistics table and earthquake operation daily report table 8 Attached with the list of main construction ships, team members and on-board representatives 6
Cover of earthquake class report
SY/T10016—1998
Appendix C
(Suggested appendix)
Content of "Instrument Record Class Report"
Table C1 gives the content and format of the cover of the "earth-based class report" Table C1 Cover of earthquake class report
CHSERVER'SLOX:HEAT)FR
Lu Shang (C.ierti:
T Zone (A):
Recording system (Rewrding System Format: Recording Format (Recording Forwt):
Recording Media:
Recording Density:Recording Length (Rrielag):
Sampling Rate (Sempe Ra-e):
Low Cutoff (LtFiterSlope):
TelrertsSlope):
System Type (SenerTypx):
Number of Streamers:
Total Number of Channels:
Channel Spacing (Group l:ucrval)
Cable Depth (Sroarepth
Grid Industry Na
East Line Number (im:):
Gun Type (GmType):
Upward Force (Opurating Presur):
Left Source Capacity (Pu:r: Arrey Vohm):
Active Capacity (Sihrd Aray Volur):
Energy Depth (Gian epi)
Grab Controller Type (GninContrallerFyjx:); Delay Time Gun (niroller Delay):; Shot Point Interval:
(UP Line Bubble (SP [nervalitP1ine):
Adjacent Cable (Adjacent Streanier):E Excitation (Road Director) (Suhanu: Group Ne. ):From There to Left (s:ld tn Pur)Stneurnicr=1 001-240
Surcaner+2
Strewner
Staer#
Towing layout
LAYOUTS
C2 Earthquake class report
SY/T10016-1998
Table C2 gives the content and format of the earthquake class report. Table (2 Earthquake class report
OBSERVER'SLOG
REELNO
FILESHOT
File number
FEATHER
Greenwich time
PAGE:1
REMARKS
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.