Microseismic monitoring data amplitude equalization method
An amplitude equalization and monitoring data technology, applied in the field of microseismic monitoring data amplitude equalization, can solve the problems of inability to guarantee the positioning accuracy, the first arrival time of the event is difficult to judge, affecting the positioning results of microseismic monitoring, etc., so as to improve the positioning accuracy. Effect
Active Publication Date: 2018-03-27
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF6 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the local energy extremum in current microseismic positioning methods will seriously affect the positioning results of microseismic monitoring
[0003] The positioning method based on event information has higher requirements for event identification and first-arrival picking. If there is a trace with extremely weak energy in the event of microseismic monitoring data, it will be difficult to judge the first-arrival time of the event on this trace. , so that the positioning accuracy cannot be guaranteed
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] Hereinafter, the method for equalizing the amplitude of microseismic monitoring data according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
[0013] Specifically, in the actual microseismic event location process, due to the distance, geological structure, geophone and other reasons, the average size of the signal received by each arrangement of the geophone array will be different, which will cause the microseismic event in the later period. positioning deviation. The essence of the present invention is to enhance the traces with relatively weak energy and weaken the traces with relatively strong energy, so that the energy between each trace can be balanced, so as to improve the positioning accuracy of microseismic events.
[0014] figure 1 A schematic flowchart of a method for amplitude equalization of microseismic monitoring data according to an exemplary embodiment of the present inventi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a microseismic monitoring data amplitude equalization method, and the method comprises the following steps: obtaining the number of microseismic events in seismic trace data; selecting a calculation time window, and solving the maximum value of the maximum amplitude absolute value of each concentrical trace of to-be-processed microseismic events in the calculation time window; solving the maximum amplitude mean value of all concentrical traces; solving the product of the amplitude of each sampling point of each concentrical trace and the square root of the ratio of the maximum amplitude mean value to the maximum amplitude absolute value of each concentrical trace, and obtaining the amplitude after equalization; repeatedly carrying out the step of selecting the calculation time window to the step of obtaining the amplitude after equalization, and carrying out the looped execution to the next to-be-processed microseismic event till all to-be-processed microseismicevents are processed. The method can eliminate the impact on the precise positioning from the different of energy sizes between the concentrical traces, and facilitates the improvement of the positioning precision of the microseismic events.
Description
technical field [0001] The invention relates to a microseismic monitoring technology for unconventional oil and gas development, more specifically, to a method for amplitude equalization of microseismic monitoring data, which mainly utilizes surface or shallow well monitoring records to extract relevant information for amplitude equalization. Background technique [0002] Microseismic monitoring and positioning mainly have two positioning methods based on energy superposition and event information. The positioning method based on energy superposition is to add the energy of the microseismic waveform of each trace, and the spatial coordinate corresponding to the maximum energy is defined as the spatial source position of the microseismic event. In the positioning method based on energy superposition, there must be certain gathers and well location energy coefficients in order to obtain comprehensive and reliable microseismic positioning energy information. However, the local...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/24
CPCG01V1/245
Inventor 刘丽婷尹陈李亚林巫芙蓉康亮曹立斌唐建张维戈理朱霁玮
Owner BC P INC CHINA NAT PETROLEUM CORP