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以发现美国各类钻井总成本长期、中期、短期的变化规律为研究目的,采用美国石油协会(API)的数据报告对美国钻井成本进行分析,研究发现:1)研究期内,美国钻井总成本变化经历了3个阶段:1990年以前先增后减,1990—1997年平稳不变,1998—2008年快速上涨;2)各类钻井成本基本都经历了上述变化过程;3)油井钻井成本的变化比气井、干井更为稳定,而气井相反,其变化波动性最大;4)跟陆上井相比,海上钻井成本的波动性更大,可预测性更弱。
The purpose of this study is to find out the long-term, medium-term and short-term changes in the total cost of various types of drilling in the United States. For the purpose of this study, a data report of the American Petroleum Institute (API) was used to analyze drilling costs in the United States. The findings were as follows: 1) During the study period, The changes experienced three stages: first increased and then decreased before 1990, unchanged from 1990 to 1997, and rapidly risen from 1998 to 2008; 2) all kinds of drilling costs basically underwent the above process of change; and 3) well drilling costs The change is more stable than that of gas wells and dry wells, but the gas wells have the opposite trend. 4) Compared with land-based wells, the cost of offshore drilling is more volatile and the predictability is weaker.