A Nonparametric Method for Automatic Denoising of Microseismic Data

Table 2

Comparison of signal denoising indicator with different SNR.

SNR	PD method		EEMD method		Wavelet method
	-6	0.0163	0.0282	0.0851	0.1073	0.0530	0.0738
-5	0.0149	0.0263	0.0760	0.0956	0.0423	0.0593
-4	0.0132	0.0245	0.0677	0.0852	0.0359	0.0500
-3	0.0128	0.0233	0.0410	0.0656	0.0306	0.0428
-2	0.0120	0.0215	0.0308	0.0585	0.0269	0.0375
-1	0.0099	0.0187	0.0355	0.0616	0.0233	0.0330
1	0.0084	0.0162	0.0383	0.0479	0.0203	0.0309
2	0.0080	0.0162	0.0245	0.0559	0.0186	0.0292
3	0.0066	0.0125	0.0278	0.0570	0.0185	0.0292
4	0.0054	0.0099	0.0256	0.0556	0.0159	0.0266
5	0.0048	0.0090	0.0248	0.0519	0.0149	0.0260
6	0.0044	0.0077	0.0215	0.0269	0.0147	0.0260
7	0.0037	0.0070	0.0236	0.0527	0.0144	0.0258
8	0.0036	0.0066	0.0171	0.0214	0.0130	0.0241
9	0.0030	0.0057	0.0222	0.0524	0.0127	0.0248
10	0.0028	0.0054	0.0212	0.0522	0.0124	0.0244