Investigation on the Secondary Generation of Natural Gas Hydrates in Horizontal Wellbore Caused by Pressure Jump during the Depressurization Development of Hydrate Bearing Layers

Table 1

Measured data in gas wells.

Well no.	Well depth	Gas output, 10^4 m^3/d	Water output, m^3/d	Wellhead temperature, °C	Well-bottom temperature, °C	Wellhead pressure, MPa	Well-bottom pressure, MPa
1	3260	5.3	15.7	34	106.5	20.402	27.704
2	3260	4.3	7	33	106	24.088	32.234
3	3260	3	3.5	32	108	30.137	39.195
4	2520	6.5	48	43	89	7.436	13.077
5	2520	5.2	33	41	96	7.482	13.164
6	2520	4	29	40	99	7.301	13.122
7	2520	3.5	38	39	98	7.012	13.155
8	2330	2.4	50	35	85	9.002	17.363
9	2330	2	45	35	84	8.679	17.597
10	2800	2	35	35	100	4.989	11.454
11	2800	1	11.3	35	97	8.367	14.185
12	3260	4.5	12	24	106	16.392	23.911
13	2860	2.5	49	31	107.6	4.394	10.592
14	2800	2	33	30	101.9	6.433	12.024