Application of Numerical Modelling and Genetic Programming in Hydrocarbon Seepage Prediction and Control for Crude Oil Storage Unlined Rock Caverns

Table 3

GP equations of the oil and gas seepage value (m³/24 hr).

Equation number	Description	Mathematical phrase	Mean percent error	Max percent error	Coefficient of determination ()	Adjusted ()
	Oil seepage; = 100–10 md		3.32	17	99.4	99.2
	Oil seepage; = 10–1 mD		2.2	13.2	99.8	99.7
	Gas seepage,; from all parts		5.9	18	98	96
	Gas seepage,; not from all parts		12	29	92	90

and are described in Appendix.