A Parametric Study of Coupled Hydromechanical Behaviors Induced by Shallow Water Flow in Shallow Sediments in Deepwater Drilling Based on Numerical Modeling

Table 4

Relative impacts of six sensitivity analysis parameters on pressure and stress at three time steps.

Time (d)	Overpressure		Permeability		Porosity
	Pressure	Stress	Pressure	Stress	Pressure	Stress
0.1	18.47%	99.98%	1.62%	0.58%	1.24%	3.69%
0.5	15.13%	99.94%	4.37%	35.77%	3.80%	33.70%
1.0	11.80%	99.92%	6.84%	64.59%	5.88%	64.47%
Time (d)	Water viscosity		Young’s modulus		Water compressibility
	Pressure	Stress	Pressure	Stress	Pressure	Stress
0.1	1.89%	4.36%	0.10%	2.24%	1.72%	5.44%
0.5	5.30%	45.69%	0.03%	0.48%	5.25%	45.96%
1.0	7.69%	79.05%	0.01%	0.10%	8.00%	85.48%