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- rock drillability index 岩石可钻性指数
- Rock drillability is an important and basic drilling parameter. 岩石可钻性是一项重要的钻井基础数据。
- D index is also called formation drillability index (dimensionless). 指数也称地层可钻性指数(无量钢)。
- A new computerized method to quickly calculate the rock drillability with logging data is introduced. 介绍了一种利用测井资料快速求得岩石可钻性级值的计算机方法。
- The new method can predict rock drillability accurately and draw the continuous section of rock drillability quickly. 该方法能够比较准确地预测岩石可钻性,快速做出连续的地层可钻性剖面图。
- Besides, the sensitivity of the drillability index in identification of ground layer is analyzed and its physical signification is expatiated also. 同时，对新的可钻性指标在地层识别中的敏感性进行了分析，阐述了可钻性指标在地层识别中的物理意义。
- 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。
- CHou, T.-H(1971)A study on rock drillability in the Chinshui gas field, Taiwan. Petroleum Geology of Taiwan, 8, 93-117. 詹益谦(1971)台湾锦水气田岩层可钻性之研究。台湾石油地质，第8号，第93-117页。
- This paper applied subordinate function of fuzzy mathemetics to the classfication of rock drillability. 利用模糊数学中的隶属函数对岩石可钻性进行了分级，收到较好效果。
- The theory and method of achieving rock drillability with multi logging parameters are introduced in this paper. 介绍了利用多测井参数求取岩石可钻性的理论和方法，并给出了预测岩石可钻性的数学模型。
- Based on the coupling relationship among effective thrust, rotation speed, penetration rate and drillability index, a calculation formula is established. 基于钻进过程中有效轴压、转速、穿孔速率和可钻性指标间的耦合关系，建立了可钻性指标的计算公式。
- To fulfill the need of high drilling quality and high drilling speed, more rapid and precise observations need to be done on rock drillability. 为满足优质高速钻井的要求,需要对岩石可钻性做出快捷、精确的判断。
- Rock drillability is significant for selecting proper bit and improving drilling efficiency, and can be properly predicted by well logging information. 岩石可钻性是钻头选型、提高钻井效率的基础,利用测井资料预测岩石可钻性是行之有效的手段。
- 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。
- Deep well drilling is characterized by long open holes, high bottomhole temperature, bad rock drillability, low ROP and wellbore sloughing, etc. 深井钻井具有裸眼段长、井底温度高、岩石可钻性差、机械钻速低、井眼易失稳等问题。
- ZHAO Jun, CAI Ya-xi, LIN Yuan-hua.Application of sonic logs to rock drillability and bit selection[J].Well Logging Technology, 2001,25(4):305-307. [4]赵军;蔡亚西;林元华.;声波测井资料在岩石可钻性及钻头选型中的应用[J]
- With the fractal geometry theory, this paper puts forward a new rock drillability testing method by selecting detritus from bottom hole as object. 利用分形几何理论，研究了钻井过程中岩石破碎机理及形成过程，提出了一种以井底返出的岩屑为对象的岩石可钻性测试方法。
- The results are showed that the method is simple,results are satisfactory and GMDH can be used to calculate the rock drillability. 通过试算表明,该方法运算简便,结果可靠,可用于计算岩石可钻性。
- The self-organization method(GMDH)is studied to build the relationship between rock drillability and the rock characteristic parameters. 文中选用数据组合处理方法(GMDH)建立岩石可钻性与各岩石力学特性参数的函数关系,编制了该方法确定可钻性的计算机软件。
- The rock drillability has close connection with sonic interval travel time and formation pore pressure can be reflected by it in some degree. 地层孔隙压力在一定程度上可由测井声波时差来反映。
