CN101833113A - Method for monitoring oil well fracturing microseismic ground-borehole crack - Google Patents
Method for monitoring oil well fracturing microseismic ground-borehole crack Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
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Abstract
The invention designs a method for monitoring an oil well fracturing microseismic ground-borehole crack, which is characterized by comprising the following steps of: receiving microseismic waves by monitoring substations arranged at the circumference of a wellhead by utilizing the propagation characteristic of an elastic wave field in a stratum medium, forming a series of equation sets according to the arrival time difference of the microseismic waves of each substation, and solving the series of equation sets to determine the position of a microseismic source and further determine stratum parameters of crack distribution, such as the azimuth, the length, the height, the ground stress direction and the like. The background noise in a well is small, filtration processing is carried out on a ground observation signal through an underground observation signal, fracturing microseismic signals and ground interferences are screened and distinguished, a detector placed in the well is a reference value of a whole set of system collected signals, the signal collected by a ground seismometer is identified by people through the reference value to filter an interference signal, so that a monitored result of the people can be more true and reliable.
Description
Technical field
The present invention relates to a kind of fracturing fracture microearthquake monitoring method, Crack Monitoring method in particularly a kind of wellfracturing microearthquake ground-well.
Background technology
At present, utilize the conventional method of microearthquake fracturing fracture monitoring to be divided into monitoring and ground monitoring two big classes in the well.This method observation instrument cost of monitoring is too high in the well, and implementation condition is too harsh, requires to find out in 600 meters scopes three mouthfuls " monitor wells ", and this scheme is mainly used abroad; And this method of ground monitoring causes the confidence level of observation data not high owing to being subjected to environmental noise to influence bigger, microearthquake information acquisition stationary problem, and observation station also is difficult to pinpoint.
Summary of the invention
The present invention is based on crack in the pressure break and form the ground disturbance (microearthquake) that is produced and carry out monitoring, efficiently solve that the monitoring difficulty is big in the prior art, cost is high and can't satisfy deep well fracturing Crack Monitoring problem.The present invention designs Crack Monitoring method in a kind of wellfracturing microearthquake ground-well, it is characterized in that: utilize the propagation characteristic of elasticity wave field in stratum media, the Monitor Sub-Station of Less that the microseism ripple is disposed in around the well head is received, step-out time according to each substation microseism ripple, can form the series of equations group, find the solution this a series of system of equations, just can determine the microseism source location, and then determine the formation parameters such as orientation, length, height and stress direction of fracture distribution.Turn to mechanism in order to study the crack, adopted the microearthquake technology to monitor, monitoring system adopts modules such as 6 substation microseismic signals collecting units, main control unit, wireless data sending, real-time positioning.The microearthquake sensor is placed on the ground around the fractured well, directly provides the microearthquake focus space distribution that forms in the pressure break by computing machine, describes new, the bearing of trend in old crack, geometric shape according to the focus space distribution.Adopt ground-well neutral body monitoring method, by the observation signal in the well observation signal on ground is carried out Filtering Processing, pressure break microseismic signals and ground are disturbed screen differentiation, the microseism point that inverting is come out is more genuine and believable.The wave detector that is placed in the well is a reference value of whole system acquired signal, and we come the signal that the ground geophone is collected is discerned with this reference value, and filtering interference signals makes that our achievement of monitoring is more true and reliable.Well geophone provides reference signal for surface geophone, the frequency of main reference reference signal and phase propetry, carry out seismic data processing by well geophone signal and surface geophone signal, obtain the time parameter of the seismic event of each surface geophone correspondence, the time parameter substitution formula of each ground acquisition station is calculated, obtain corresponding underground microseism focus coordinate.Advantage of the present invention is because the ground unrest in the well is little, and filtering interference signals makes monitoring result more accurate, and control is simple and cost is lower.
Description of drawings
Below in conjunction with drawings and Examples the present invention is elaborated,
Accompanying drawing 1 is a front view (FV) of the present invention,
Accompanying drawing 2 is a vertical view of the present invention.
Embodiment
At first will be around fractured well 15 ground geophones (2,3,4,5,6) radial distribution, in fractured well 1 peripheral 600m scope, find a bite monitor well 7, utilize pressure break monitoring to be connected with geophone 10 in the well, then geophone in the well 10 is put into 1/2 depths of fractured well 1 fractured layer with triple cable 8 on the command car.Geophone 10 adopts state-of-the-art in the world at present acceleration transducer as the front-end collection unit in the well, and minimum measurement accuracy is 10
-5M/s
2, meet the demands for measuring the microearthquake signal.The master station that native system is arranged on pressure break monitoring and command car, master station adopts an industrial computer, operation WINDOWSXP operating system, link to each other with master station through adapter by network interface, the earthquake data acquisition management software is installed on the master station, carry out communication by wireless network between master station and each substation, carry out order and data transmission according to pre-set communication protocol and each substation.Its function mainly contains the state of each acquisition station of monitoring; The running parameter of each acquisition station is set, as sampling rate, sampling length, preamplification gain etc. and the image data that reclaims, stores each acquisition station, and deposits with standard earthquake data layout; 5 acquisition substation in ground (2,3,4,5,6) are finished the acceleration signal that collects the collection of microearthquake data by built-in data acquisition module, acquisition module with the data storage that collects in large capacity data memory, then with the data that collect by wireless network and master station communication, data are sent in the industrial computer preserve, independently-powered pattern is adopted in each substation, for adapting to the field work demand, external power supply uses the 12V battery, and the inner DC-DC power transfer module that adopts is system's power supply.The function division of three big modules is as follows:
1. data acquisition module
Data acquisition module is based on oversampling technique, 24 delta sigma ADC technology and digital filter techniques, with 24 delta sigma A/D CS5372 is core, for auxiliary, the design dynamic range reaches 130dB, sampling precision height, can gather the geological data of 8 passages simultaneously with the FPGA digital circuit.
2. data storage and communication module
This module is responsible for temporary substation geological data, and is uploaded to main frame by network interface.Acquisition station maximum data storage capacity reaches 1M sampled point/road, adopts 8GCF card memory cell design, and the assurance system can carry out long data acquisition in the open air.
3. power module
Adopting the 12V storage battery is to import power supply outside the system, because system power supply comprises following several groups: mimic channel power supply ± 5V, digital circuit power supply 3.3V, 1.5V, 1.2V, adopt the wide DC-DC voltage conversion circuit of high precision, working temperature as system power supply, analog power and digital power strictness are separated, avoid interfering with each other between mimic channel and the digital circuit, guarantee reliability, the stability of system's field work.
When fractured well 1 carries out the waterfrac treatment operation, utilize necessary equipment and instrument to pump into fluid to zone of interest from ground, make fluid in the reservoir pore space surpass the parting pressure of reservoir, in reservoir, form a man-made fracture, thereby generation elastic wave, utilize the propagation characteristic of elasticity wave field in stratum media, geophone 10 carries out the collection of microearthquake feeble signal in 5 ground geophones (2,3,4,5,6) and the well.By system handles software, utilize the frequency and the phase place of geophone 10 signal that collects in the well, 5 ground geophones (2,3,4,5,6) are carried out Filtering Processing, because the down-hole ground unrest is little, after observation signal by the down-hole carries out Filtering Processing to the observation signal on ground, pressure break microseismic signals and ground interference are screened differentiation, and the microseism point 9 that inverting is come out is more genuine and believable.
Claims (3)
1. Crack Monitoring method in wellfracturing microearthquake ground-well, it is characterized in that: utilize the propagation characteristic of elasticity wave field in stratum media, the microseism ripple is disposed in the Monitor Sub-Station of Less monitoring around the well head, step-out time according to each substation microseism ripple, can calculate out the series of equations group, by these a series of system of equations are found the solution, can determine the microseism source location, and then determine the formation parameters such as orientation, length, height and stress direction of fracture distribution.
2. Crack Monitoring method in wellfracturing microearthquake ground-well according to claim 1, it is characterized in that: the research crack turns to mechanism, adopted the microearthquake technology to monitor, what adopt is in the well---the monitoring method that ground combines, both satisfy the quality of monitoring, also reduced cost simultaneously.
3. Crack Monitoring method in wellfracturing microearthquake ground-well according to claim 1, it is characterized in that: monitoring system adopts 6 substation working methods, each substation is formed by modules such as microseismic signals collecting unit, main control unit, wireless data transmission, GPS real-time positioning, guarantees each substation cell operation stability, reliability.
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095393A (en) * | 2011-01-06 | 2011-06-15 | 成都理工大学 | Method for dynamic grading collection of ground surface fissure information |
| CN102465698A (en) * | 2010-11-03 | 2012-05-23 | 北京科若思技术开发有限公司 | Device and method for detecting fracturing and water injection effects and dominant directions thereof |
| CN102565855A (en) * | 2012-01-02 | 2012-07-11 | 吉林大学 | Ground micro-seismic data processing method of oil field fracturing |
| CN103064111A (en) * | 2012-12-12 | 2013-04-24 | 中国石油天然气集团公司 | Micro seismic event recognition method based on morphological filtering |
| CN104018822A (en) * | 2014-05-23 | 2014-09-03 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Oil well staged fracturing effect monitoring method |
| CN104428691A (en) * | 2012-07-11 | 2015-03-18 | 普拉德研究及开发股份有限公司 | Fracture monitoring and characterisation |
| CN104950327A (en) * | 2015-06-30 | 2015-09-30 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Method for determining positions of geophones of ground microseismic observation system |
| CN105093314A (en) * | 2015-07-10 | 2015-11-25 | 中联煤层气有限责任公司 | Method for measuring and determining micro-seismic focus |
| CN105093287A (en) * | 2014-05-20 | 2015-11-25 | 中国石油化工股份有限公司 | Data processing method for monitoring microseism |
| CN105089597A (en) * | 2015-07-27 | 2015-11-25 | 中国石油天然气股份有限公司 | Crack complexity evaluation method |
| CN106054239A (en) * | 2016-05-23 | 2016-10-26 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Microseismic pressing crack monitoring observation method |
| CN106873028A (en) * | 2017-01-17 | 2017-06-20 | 克拉玛依市海晟达石油科技有限公司 | A kind of microseism ripple monitoring method and system based on SAGD |
| CN107642355A (en) * | 2017-08-24 | 2018-01-30 | 中国石油天然气集团公司 | Hydraulically created fracture monitoring system and method based on ultrasonic wave shooting method |
| CN109188528A (en) * | 2018-08-10 | 2019-01-11 | 武汉市工程科学技术研究院 | Elastic wave chromatographic imaging system and method between well |
| CN109899050A (en) * | 2019-04-15 | 2019-06-18 | 武汉理工大学 | Form the bed gas reservoir fracturing process of complex fracture network |
| CN110043262A (en) * | 2019-05-27 | 2019-07-23 | 大同煤矿集团有限责任公司 | A kind of coal mine tight roof fractured horizontal well crack well combines monitoring method up and down |
| CN110716230A (en) * | 2018-07-13 | 2020-01-21 | 中国石油化工股份有限公司 | Well-ground combined micro-seismic positioning method |
| CN110727028A (en) * | 2019-09-17 | 2020-01-24 | 河南理工大学 | A coal reservoir fracture evaluation method based on surface microseismic monitoring |
| CN112302636A (en) * | 2019-07-26 | 2021-02-02 | 中国石油天然气集团有限公司 | Hydraulic fracturing monitoring method and device |
| CN114185081A (en) * | 2021-11-11 | 2022-03-15 | 北京科技大学 | A method for monitoring the hydraulic fracturing range of surface vertical wells |
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- 2010-04-21 CN CN201010151905A patent/CN101833113A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102465698A (en) * | 2010-11-03 | 2012-05-23 | 北京科若思技术开发有限公司 | Device and method for detecting fracturing and water injection effects and dominant directions thereof |
| CN102095393B (en) * | 2011-01-06 | 2012-09-05 | 成都理工大学 | Method for dynamic grading collection of ground surface fissure information |
| CN102095393A (en) * | 2011-01-06 | 2011-06-15 | 成都理工大学 | Method for dynamic grading collection of ground surface fissure information |
| CN102565855B (en) * | 2012-01-02 | 2015-04-22 | 吉林大学 | Ground micro-seismic data processing method of oil field fracturing |
| CN102565855A (en) * | 2012-01-02 | 2012-07-11 | 吉林大学 | Ground micro-seismic data processing method of oil field fracturing |
| CN104428691A (en) * | 2012-07-11 | 2015-03-18 | 普拉德研究及开发股份有限公司 | Fracture monitoring and characterisation |
| US10107082B2 (en) | 2012-07-11 | 2018-10-23 | Schlumberger Technology Corporation | Fracture monitoring and characterisation |
| CN103064111B (en) * | 2012-12-12 | 2015-11-18 | 中国石油天然气集团公司 | A kind of micro-seismic event recognition methods based on shape filtering |
| CN103064111A (en) * | 2012-12-12 | 2013-04-24 | 中国石油天然气集团公司 | Micro seismic event recognition method based on morphological filtering |
| CN105093287A (en) * | 2014-05-20 | 2015-11-25 | 中国石油化工股份有限公司 | Data processing method for monitoring microseism |
| CN104018822B (en) * | 2014-05-23 | 2016-09-14 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | A kind of oil well staged fracturing effect monitoring method |
| CN104018822A (en) * | 2014-05-23 | 2014-09-03 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Oil well staged fracturing effect monitoring method |
| CN104950327A (en) * | 2015-06-30 | 2015-09-30 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Method for determining positions of geophones of ground microseismic observation system |
| CN105093314B (en) * | 2015-07-10 | 2017-09-22 | 中联煤层气有限责任公司 | A kind of method for determining microseism focus |
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| CN107642355A (en) * | 2017-08-24 | 2018-01-30 | 中国石油天然气集团公司 | Hydraulically created fracture monitoring system and method based on ultrasonic wave shooting method |
| CN107642355B (en) * | 2017-08-24 | 2020-11-06 | 中国石油天然气集团公司 | Hydraulic fracturing fracture monitoring system and method based on ultrasonic emission method |
| CN110716230A (en) * | 2018-07-13 | 2020-01-21 | 中国石油化工股份有限公司 | Well-ground combined micro-seismic positioning method |
| CN110716230B (en) * | 2018-07-13 | 2021-08-24 | 中国石油化工股份有限公司 | Well-ground combined micro-seismic positioning method |
| CN109188528A (en) * | 2018-08-10 | 2019-01-11 | 武汉市工程科学技术研究院 | Elastic wave chromatographic imaging system and method between well |
| CN109188528B (en) * | 2018-08-10 | 2020-04-17 | 武汉市工程科学技术研究院 | Interwell elastic wave tomography system and method |
| CN109899050A (en) * | 2019-04-15 | 2019-06-18 | 武汉理工大学 | Form the bed gas reservoir fracturing process of complex fracture network |
| CN110043262A (en) * | 2019-05-27 | 2019-07-23 | 大同煤矿集团有限责任公司 | A kind of coal mine tight roof fractured horizontal well crack well combines monitoring method up and down |
| CN112302636A (en) * | 2019-07-26 | 2021-02-02 | 中国石油天然气集团有限公司 | Hydraulic fracturing monitoring method and device |
| CN110727028A (en) * | 2019-09-17 | 2020-01-24 | 河南理工大学 | A coal reservoir fracture evaluation method based on surface microseismic monitoring |
| CN114185081A (en) * | 2021-11-11 | 2022-03-15 | 北京科技大学 | A method for monitoring the hydraulic fracturing range of surface vertical wells |
| CN114185081B (en) * | 2021-11-11 | 2023-10-27 | 北京科技大学 | A method for monitoring the hydraulic fracturing range of surface vertical wells |
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