Table 1.

Water chemistry, microbial numbers and corrosion rates of samples of produced water (PW), central processing facility water (CPW), injection water (IW), and solids and sludges (SS) obtained from an oil field in Oceania in 2013/2014.

Sample Name	Sample appearance	pH	NaCl (Meq)	Sulfate (mM)	Acetate (mM)	APB/mla	SRB/mla	CR (mm/yr) wt loss	CR (mm/yr) Fe diss
OC1_PW	Clear water with oil	7.45	0.25	0.93	4.23	1.5 × 103	<30	NDb	0.024
OC2_PW	Same as OC1	7.67	0.23	0.55	7.97	2.4 × 105	<30	NDb	0.031
OC3_PW	Brown water with oil	5.81	0.49	1.77	4.44	4.3 × 103	<30	0.032	0.027
OC4_PW	Same as OC1	6.51	0.25	0.58	13.19	4.3 × 106	<30	0.024	0.029
OC5_PW	Same as OC1	7.11	0.3	0.87	6.82	2.4 × 107	<30	0.014	0.024
OC6_PW	Same as OC1	7.4	0.17	0.74	5.68	<30	<30	0.022	0.024
OC7_PW	Same as OC1	7.75	0.1	1.01	2.11	4.3 × 105	<30	0.026	0.015
OC12_PW	Same as OC1	7.47	0.18	0.82	5.22	4.3 × 105	<30	0.017	0.02
OC13_PW	Same as OC1	7.46	0.21	0.68	4.51	2.4 × 106	<30	0.025	0.024
OC14_PW	Same as OC1	7.35	0.2	0	4.34	4.3 × 103	2.4 × 105	0.017	0.014
	Average	7.2	0.24	0.8	5.85			0.022	0.023
	Standard deviation	0.6	0.1	0.44	3.03			0.006	0.006
OC8_CPW	Yellow water; no oil	6.54	0.18	6.29	67.67	<30	<30	0.003	0.005
OC9_IW	Clear water; no oil	6.92	0.15	2.45	33.98	<30	<30	0.005	0.008
OC10_IW	Same as OC8	6.92	0.2	2.72	52.15	<30	<30	0.003	0.01
OC18_CPW	Same as OC9	7.29	0.16	1.89	7.15	<30	<30	NDb	NDb
OC15_IW	Same as OC8	7.01	0.2	0.84	6.37	<30	<30	0.023	0.021
OC17_IW	Same as OC8	7.33	0.21	0.91	5.09	<30	<30	0.013	0.019
	Average	7	0.18	2.52	28.7			0.009	0.013
	Standard deviation	0.29	0.02	2	26.9			0.009	0.007
OC11_CPSS	Black oily solids	7.08	0	0	0.65	9.3 × 104	2.4 × 108	0.038	NDb
OC16_CPSS	Black oily solids	6.8	0	0	6.09	2.4 × 106	4.3 × 107	0.033	NDb
	Average	6.94	0	0	3.37			0.036
	Standard deviation	0.2	0	0	3.85			0.004

CRs were determined with 20 carbon steel beads in a volume of 20 ml.

^aMPNs of APB and SRB; lack of positive wells was scored as <30/ml because of the 0.1 ml volume used for 10-fold dilutions.,

^bND is not determined.