An efficient diffraction stacking interferometric imaging location method for microseismic events

Zhang，Qingshan1; Zhang，Wei2,3,4

2022-01-24

10.1190/geo2021-0233.1

GEOPHYSICS   影响因子和分区

0016-8033

1942-2156

Migration-based location methods automatically obtain microseismic event locations without manual picking and are often used in microseismic monitoring during hydraulic fracturing. They utilize waveform stacking over all receivers to enhance the ability to detect weak events. However, these methods may fail to effectively increase the signal-to-noise ratio (SNR) of the stacked trace and may not obtain an accurate source location if polarity reversals occur in seismic records. To overcome this problem, traditional approaches rely on polarity correction by characteristic function or polarity determination by source moment tensor inversion and focal mechanism search. To ensure both location accuracy and efficiency, we develop the diffraction stacking interferometric imaging (DSII) method for locating microseismic events. We first obtain the approximately symmetrical pattern responding to the source moment tensor by using diffraction stacking (DS) and then apply interferometric imaging to focus the pattern onto its center and extract the source location. The DSII method overcomes the inaccurate location problem under polarity reversal caused by source mechanisms, and it also benefits from the high efficiency and noise suppression of the DS. Moreover, the symmetrical pattern in the DS source image can also be used as a means of quality control for field data. We use synthetic and field data to demonstrate the location ability of this method. The results show that the DSII can efficiently reduce the effects of strong noise on event detection and location. We can achieve a quasi-symmetrical pattern on the DS image and obtain a focused interferometric image when the velocity has systematic errors. Compared with the DS, the DSII method also has a better performance on sparse receiver networks. Finally, the DSII method is applied to field data acquired using a surface array during hydraulic fracturing.

SCI ; EI

英语

通讯

National Key R&D Program of China[2018YFC1504204] ; National Natural Science Foundation of China[U1901602] ; Key Special Project for Introduced TalentsTeam of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0203] ; Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology[ZDSYS20190902093007855] ; Shenzhen Science and Technology Program[KQTD20170810111725321]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000793465800001

SOC EXPLORATION GEOPHYSICISTS

20220611600908

Diffraction ; Efficiency ; Hydraulic fracturing ; Interferometry ; Location ; Microseismic monitoring ; Systematic errors ; Tensors

Earthquake Measurements and Analysis:484.1 ; Petroleum Deposits : Development Operations:512.1.2 ; Information Theory and Signal Processing:716.1 ; Production Engineering:913.1 ; Algebra:921.1 ; Optical Variables Measurements:941.4

GEOSCIENCES

2-s2.0-85124072630

Scopus

1.University Of Science And Technology Of China,School Of Earth And Space Sciences,Hefei,230026,China
2.Shenzhen Key Laboratory Of Deep Offshore Oil And Gas Exploration Technology,Southern University Of Science And Technology,Shenzhen,518055,China
3.Southern Marine Science And Engineering Guangdong Laboratory (Guangzhou),Guangzhou,511458,China
4.Department Of Earth And Space Sciences,Southern University Of Science And Technology,Shenzhen,518055,China

Zhang，Qingshan,Zhang，Wei. An efficient diffraction stacking interferometric imaging location method for microseismic events[J]. GEOPHYSICS,2022,87(3):1-45.

Zhang，Qingshan,&Zhang，Wei.(2022).An efficient diffraction stacking interferometric imaging location method for microseismic events.GEOPHYSICS,87(3),1-45.

Zhang，Qingshan,et al."An efficient diffraction stacking interferometric imaging location method for microseismic events".GEOPHYSICS 87.3(2022):1-45.