Research on intelligent judgment method of natural gas hydrate drilling risk
Haitao Li,
Zhaolong Ge,
Na Wei,
Wantong Sun,
Yao Zhang,
Jin Xue,
Lin Jiang,
Jun Pei,
Bing Liao,
Hongliang Cao,
Ruixu Zhang,
Shuangli Li,
Qixia Lu,
Jinyan Luo
Affiliations
Haitao Li
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400030, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China; Corresponding author.
Zhaolong Ge
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400030, China; Corresponding author.
Na Wei
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China; State Key Laboratory of Natural Gas Hydrate, Beijing, 100027, China; Corresponding author.
Wantong Sun
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China; State Key Laboratory of Natural Gas Hydrate, Beijing, 100027, China
Yao Zhang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China; State Key Laboratory of Natural Gas Hydrate, Beijing, 100027, China
Jin Xue
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Lin Jiang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Jun Pei
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Bing Liao
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Hongliang Cao
Drilling Department of CNPC Offshore Engineering Company Limited, Tianjin, 300451, China
Ruixu Zhang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Shuangli Li
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Qixia Lu
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
Jinyan Luo
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
There are many emergency risks in the process of natural gas hydrate (NGH) drilling. In order to ensure the safe and efficient exploitation of NGH, it is urgent to establish an intelligent judgment method for the risks in the process of NGH drilling. In this paper, the response relationship between monitoring parameters and risk categories of NGH while drilling is established. Based on fuzzy analytic hierarchy process (FAHP), the comprehensive weights of 10 risk monitoring parameters are obtained, including gas production, wellbore instability, hydrate ice barrier, drill string fracture, sticking, bit balling, drilling tool piercement, gas seepage, seabed subsidence and seabed landslide. Besides, the comprehensive judgment weight matrix is constructed, and the reasonable fluctuation range of monitoring parameters is formed. Thus, the intelligent judgment method of NGH drilling risk is established. The intelligent judgment and alarm of NGH drilling risks can be realized quickly and accurately by this method, namely, it can monitor the risks in the process of operation and guarantee the construction safety of NGH drilling.
