Research on Downhole Risk Assessment Method for Production Wells

2018 4th International Conference on Environment and Renewable Energy

生态环境科学;能源学

Si, N.T.^1 ; Chen, Q.W.^1 ; Long, J.Q.^1 ; Gao, Y.H.^1

Tianjin Branch Company, CNOOC (China), Ltd., Tianjin, China^1

关键词: Control measures;    Large amounts;    Offshore oil exploitation;    Offshore oilfield;    Production wells;    Qualitative and quantitative assessments;    Reservoir energy;    Risk assessment methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/159/1/012006/pdf
DOI  :  10.1088/1755-1315/159/1/012006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

At present, because of long offshore oil exploitation time, a large amount of adjusting wells and large offshore oil-gas production, downhole risks are difficult to be evaluated, and safety of offshore oil exploitation faces a great challenge. Aiming at the difficulties, reservoir energy is calculated through PHAST software, and overflow capacity of oil wells is analysed. Based on analysis of factors influencing downhole risks of offshore oilfield wells and analysis of reservoir energy and overflow capacity, a qualitative and quantitative assessment method is proposed for downhole risks of production wells. Downhole risk grades are divided according to the method, and corresponding control measures are proposed. This method is applicable to an offshore oilfield, risk grades of more than one hundred wells are divided, and corresponding control measures are proposed for different risk grades, so that downhole risks are reduced, and safety exploration of the oilfield is guaranteed.