Research and application of borehole structure optimization based on pre-drill risk assessment

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Zhang, Guohui^1 ; Liu, Xinyun^1 ; Chenrong^1 ; Hugui^1 ; Wenhua, Yu^1 ; Sheng, Yanan^2 ; Guan, Zhichuan^2

PetroChina Research Institute of Petroleum Exploration and Development, Beijing

100083, China^1

College of Petroleum Engineering, China University of Petroleum, Qingdao, SHANDONG

266580, China^2

关键词: Drilling engineering;    Drilling operation;    Formation pressure;    Lost circulation;    Research and application;    Scientific basis;    Structure design;    Structure optimization;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012140/pdf
DOI  :  10.1088/1755-1315/94/1/012140

来源: IOP

【 摘 要 】

Borehole structure design based on pre-drill risk assessment and considering risks related to drilling operation is the pre-condition for safe and smooth drilling operation. Major risks of drilling operation include lost circulation, blowout, sidewall collapsing, sticking and failure of drilling tools etc. In the study, studying data from neighboring wells was used to calculate the profile of formation pressure with credibility in the target well, then the borehole structure design for the target well assessment by using the drilling risk assessment to predict engineering risks before drilling. Finally, the prediction results were used to optimize borehole structure design to prevent such drilling risks. The newly-developed technique provides a scientific basis for lowering probability and frequency of drilling engineering risks, and shortening time required to drill a well, which is of great significance for safe and high-efficient drilling.