摘要
岩石可钻性是评价岩石破碎难易程度的综合指标,是钻头选型的重要依据,而目前所能给出的可钻性剖面一般仅为一条曲线或某个曲面,应用范围小,难以满足实际工程的需要。在分析滑动最小二乘法的理论基础上,针对三维空间可钻性场分布规律计算这一问题进行深入地分析和讨论,给出了计算区域可钻性场的理论模型和计算方法。实例表明,应用该数学模型计算精度完全满足工程要求,该方法切实可行。
The drillability of rock is a collecting index to evaluate the fragmentation rate of rock,so the drillablilty is an im- portant basis for the selection of drilling bit.However.the present available drillability section can only provide one curve or a certain curved surface,so the narrow application range is hard to meet the requirement of practice.On the ba- sis of analysis on sliding least square method,the calculation of distribution pattern of three-dimensional drillability field is deeply discussed and analyzed,and a theoretical model and calculation method of regional drillability is obtained.Practi- cal application shows that the precision of this mathematical model is high enough to meet the requirement of project.
出处
《石油地质与工程》
CAS
2008年第3期82-84,共3页
Petroleum Geology and Engineering
关键词
可钻性场
滑动最小二乘法
权函数
基函数
空间域
drillability field
sliding least square method
weight function
basis function
spatial domain
