Forward modelling and identification of shallow gas in the Bohai Bay seabed

Geoenvironmental Disasters

Table 1 Geological drilling data sheet

No	Depth of bottom layer/m	Sediment type	Water content %	Wet bulk density N/cm³	Proportion	Porosity %	Acoustic wave velocity m/s
1	2.4	Soft clay	55	16.5	2.7	62	1506
2	3.3	Medium dense silt	21	20.4	2.71	39	1671
3	14.5	Muddy clay	38	18.5	2.72	51	1588
4	16.7	Silty fine sand	26	19.3	2.69	45	1627
5	19.8	Hard silt	26	19.7	2.7	43	1643
6	22	Dense silt	23	20	2.72	42	1651
7	25.7	Dense silty fine sand	20	20.5	2.68	38	1684
8	28.8	Dense silt	28	19.1	2.68	46	1621
9	34.8	Hard clay	37	18.5	2.69	50	1594
10	40.6	Dense silt	23	19.6	2.71	44	1635
11	49.8	Silty clay	27	20.4	2.71	39	1674
12	55.7	Dense silt	26	19.6	2.7	44	1638
13	58.8	Hard clay	35	18.2	2.71	52	1575
14	61.7	Dense fine sand	24	19.2	2.7	46	1619
15	81.1	Hard silty clay	30	19.8	2.72	43	1644
16	91.7	Dense sandy silt	21	19.9	2.72	42	1645
17	106.6	Hard silty clay	20	20.5	2.72	39	1673
18	111.1	Dense silt	26	19.5	2.71	44	1631
19	120.3	Hard silty clay	21	20.5	2.71	39	1676