D index is also called formation drillability index (dimensionless).
指数也称地层可钻性指数(无量钢)。
The value of rock drillability is usually used to select the type of bit.
钻头类型通常用岩石可钻性级值的大小来选择。
It is a simple and feasible approach to calculate rock drillability from log data.
利用测井资料求取岩石的可钻性是一种简便可行的途径。
The paper figured out the volume of rock drillability and optimum bit selecting program.
求出了新疆麦盖提地区可钻性级值及最优钻头选型方案。
Rock drillability test is the foundation of prediction rock drillability from well logging data.
室内岩石微可钻性测试是测井预测岩石可钻性的实验基础。
This method was applied to predict the formation drillability of Fugu1Well in Changqing Oilfield.
应用该方法对长庆油田富古1井的地层可钻性进行了预测。
Related techniques and conditions are provided for drillability prediction to particular oil fields.
为实现特定区域油田的可钻性预测提供了技术和条件。
The correlation between the formation drillability grade and bit type has been basically established.
按资料建立了级别-类型关系；提取了地层可钻性梯度信息。
Practically it proves that the fractal method has higher precision to ascertain rock drillability grade.
经现场检验，分形法确定岩石可钻性级值具有较高的精度。
The evaluation of drillability anisotropy of the formation is very important for well trajectory control.
地层可钻性各向异性的评价对井眼轨迹控制具有重要意义。
The results of drillability grade shows a bow-shaped curve the unloading force rising as increasing the well depth.
试验结果表明，随着井深的增加，井底岩石卸载量亦增加，岩石可钻性级值存在一个由增加变为减少的趋势。
Test shows that it's an effective model to predict the formation drillability, and its accuracy reaches as high as 90%.
通过实例验证，表明这是一种有效的确定可钻性的方法，其预测精度可以达到90 %以上。
This is a response of the bottom - hole unloading effect on rock drillability which is a new concept of deep well drillability.
该过程反映了井底岩石的卸载效应，是深井岩石可钻性的一个新概念。
It is possible to use the parameter integrated RMS to assess rock indentation hardness and further to predict rock drillability.
有可能利用积分rms这一参数来估价岩石压入硬度，并进一步预报岩石可钻性。
Rock drillability of rock samples was studied by means of experiment under zero pore pressure and simulated down hole conditions.
本文用试验方法研究了石油钻井过程中井底岩石零孔隙压力条件下的岩石可钻性。
Formation drillability is related to formation compact degree and pore fracture degree, so NDR can reflect formation pore pressure state.
地层可钻性与地层的压实程度和孔隙破裂程度有关，因此NDR可以反映地层孔隙压力的情况。
Drillability of the rocks in deep zones should be researched and effective bit fits for deep glutenite should be developed and introduced.
开展深层岩石可钻性研究，研制和引进适合深层砂砾岩体的高效钻头。
The fractal theory is applied to interpret the fracturing mechanism of rock debris which is analysed by the drillability energy test methods.
将分形理论用于解释岩石可钻性能量测试方法中岩屑试样的破碎机理。
Evaluating rock drillability distribution rule before strata has been opened has practical significance to guidance of drilling construction.
预先评价未打开地层的岩石可钻性分布规律，对钻井施工提供指导是有实际意义的。
The study of Rock drillability and blastibility is a basic topic in the fields of drilling and blasting, it has important practical meaning also.
岩石可钻性和可爆性研究是凿岩爆破领域的基础性课题，同时也具有重要的实际意义。
Nowadays, at home and abroad, there are few reports about how to predict rock drillability of wildcat well before drilling in new exploration area.
目前，国内外关于新探区野猫井的岩石可钻性钻前预测方面的研究很少。
By sampling the drill cuttings and using a microcomputer at the well site, the rock drillability can be determined by the energy law measure system.
能量法岩石可钻性测定系统是通过采集钻井井口岩屑并利用微机来测定岩石的可钻性。
There is stress concentration near borehole wall, where rocks drillability gets worse. It is explained that the side of PDC bits is easy to be damaged.
靠近井壁区域存在应力集中现象，岩石可钻性变差，这是PDC钻头外侧易损坏的原因。
In this paper the predictability of drillability time series was analyzed using fractal method based on the study of drillability time series characters.
本文从研究可钻性时间序列特征出发，应用分形几何方法，分析了可钻性时序的可预测性。
The empirical equation of drillability varying with depth has been checked against drilling data, 80% of the drilling data have a conformity greater than 0.8.
实钻资料检验了经验式的符合率，其中80%的资料达到了0.8以上的符合率。
The mechanical property and drillability of rocks are the basic quality available for analyzing and evaluating the anti fracture and drilling resistance of rocks.
岩石力学性质和可钻性是分析和评价岩石抵抗破碎和钻进的基本性质，也是合理选择碎岩工具和工艺的基础。
The rack can be used to work on all kinds of micro-drilling experiments such as analyzing of rock sample drillability, testing of diamond tools aging and life span.
它可在室内从事各种微钻实验，包括岩样可钻性分析、金刚石钻具时效、寿命等实验。
The rack can be used to work on all kinds of micro-drilling experiments such as analyzing of rock sample drillability, testing of diamond tools aging and life span.
它可在室内从事各种微钻实验，包括岩样可钻性分析、金刚石钻具时效、寿命等实验。
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