China Geological Survey, Beijing 100037, China; Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Xu-wen Qin
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Hai-jun Qiu
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Neng-you Wu
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China
Hai-long Lu
Peking University, Beijing 100871, China
Wen-wei Xie
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China; Institute of Exploration Techniques, China Academy of Geological Sciences, Langfang 065000, China
Jing-an Lu
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Fei Peng
CNPC Offshore Engineering Company Ltd., Beijing 100102, China
Zhen-qiang Xu
China Geological Survey, Beijing 100037, China
Cheng Lu
China Geological Survey, Beijing 100037, China; Center of Oil & Natural Gas Resource Exploration, China Geological Survey, Beijing 100083, China
Zeng-gui Kuang
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Jian-gong Wei
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Qian-yong Liang
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Hong-feng Lu
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
Bei-bei Kou
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
ABSTRACT: Natural gas hydrates (NGH) is one of key future clean energy resources. Its industrialized development will help remit the huge demand of global natural gas, relieve the increasing pressure of the environment, and play a vital role in the green sustainable growth of human societies. Based on nearly two decades’ studying on the reservoir characteristics in the South China Sea (SCS) and the knowledge of reservoir system, the China Geological Survey (CGS) conducted the first production test on an optimal target selected in Shenhu area SCS in 2017. Guided by the “three-phase control” exploitation theory which focused on formation stabilization, technologies such as formation fluid extraction, well drilling and completing, reservoir stimulating, sand controlling, environmental monitoring, monitoring and preventing of secondary formation of hydrates were applied. The test lasted for 60 days from May 10th when starting to pump, drop pressure and ignite to well killing on July 9th, with gas production of 3.09×105 m3 in total, which is a world record with the longest continuous duration of gas production and maximal gas yield. This successful test brings a significant breakthrough on safety control of NGH production.
