Nanoparticle foaming agents for major gas fields in China

XIONG Chunming,CAO Guangqiang,ZHANG Jianjun,LI Nan,XU Wenlong,WU Junwen,LI Jun,ZHANG Na

Table 9 Comparison tests of nano-particle and conventional foaming agents in the same wells in a block of Sulige gas field in two years.

Well No.	Conventional foaming agents used in 2015			Nano-particle foaming agents used in 2016			Gas pro- duction in- crease/%	Pressure difference drop/%	Usage reduction/%
Well No.	Injection rate/(L?d^-1)	Wellhead tubing- casing pressure difference/MPa	Daily gas production/ (10⁴m³?d^-1)	Injection rate/ (L?d^-1)	Wellhead tubing- casing pressure difference/MPa	Daily gas production/ (10⁴m³?d^-1)	Gas pro- duction in- crease/%	Pressure difference drop/%	Usage reduction/%
Su-#1	16.67	4.86	1.17	6.67	4.43	1.26	7.83	8.85	60
Su-#2	8.33	1.47	0.91	5.00	2.18	0.93	1.94	-48.57	40
Su-#3	16.67	2.50	0.91	6.67	0.72	0.91	0.39	71.04	60
Su-#4	16.67	9.99	1.25	5.00	8.76	1.43	14.18	12.29	70
Su-#5	16.67	6.04	1.12	6.67	3.14	1.46	30.53	48.09	60
Su-#6	16.67	2.40	0.44	5.00	1.06	0.47	5.88	55.98	70
Su-#7	8.33	4.00	1.46	6.67	2.26	1.56	7.03	43.56	20
Su-#8	8.33	1.03	0.89	6.67	1.28	0.86	-3.44	-24.59	20
Average	13.54	4.04	1.02	6.04	2.98	1.11	8.04	20.83	50