Influencing factor analysis of shale micro-indentation measurement

Han, Qiang; Chen, Ping; Ma, Tianshou

doi:10.1016/j.jngse.2015.09.010

Cited by 29 publications

(11 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the drilling process, the drill bit may pass through greatly varying geologies, which may be reflected in their different properties. Even within a single rock type, the properties can vary markedly, as shown by various workers who used techniques such as nanoindentation and atomic force microscopy (AFM) to map the variation in properties of a wide range of rocks [27][28][29][30][31][32][33][34][35][36][37][38][39]. In granite, which is often used in laboratory-based trials of PDC cutters (see below), Heinrichs et al [35] showed wide variations in hardness of the three major constituents: quartz (H = 13 ± 1.0 GPa), feldspar (H = 10 ± 1.0 GPa), and biotite (H = 3.4 ± 1.3 GPa).…”

Section: Geology Of Hydrocarbon Reservoirsmentioning

confidence: 99%

Applications of Diamond to Improve Tribological Performance in the Oil and Gas Industry

Wheeler

2018

Lubricants

View full text Add to dashboard Cite

The use of diamond in tribological applications in the oil and gas industry is reviewed. The high hardness, strength, and corrosion resistance of diamond make it an attractive option for components that are susceptible to degradation by abrasive, erosive, or adhesive wear; such components may also be prone to corrosion owing to the nature of the environments to which they are often exposed. Applications such as drill bits, bearings, and mechanical seals benefit from the use of diamond, while choke valves are the subject of research programs to assess the suitability of chemical vapor deposition (CVD) diamond for these components. Also discussed are some of the conditions experienced by the components and how the properties of diamond enhance their operating lives.

show abstract

Section: Geology Of Hydrocarbon Reservoirsmentioning

confidence: 99%

Applications of Diamond to Improve Tribological Performance in the Oil and Gas Industry

Wheeler

2018

Lubricants

View full text Add to dashboard Cite

show abstract

“…When the peak value of load is the same, energy density under dynamic-static combination load is higher than that under static load condition and rock fragmentation efficiency is also improved significantly. A quantitative evaluation method based on microindentation test technology was proposed by Chen et al [158,159] to research the mesomechanical properties of shale. The mesoscopic elastic modulus and indentation hardness are heterogeneous in distribution considering different influencing factor.…”

Section: Application Of the Drill String Vibrations And Shocksmentioning

confidence: 99%

A Review of the Evaluation, Control, and Application Technologies for Drill String Vibrations and Shocks in Oil and Gas Well

Dong

Chen

2016

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

Drill string vibrations and shocks (V&S) can limit the optimization of drilling performance, which is a key problem for trajectory optimizing, wellbore design, increasing drill tools life, rate of penetration, and intelligent drilling. The directional wells and other special trajectory drilling technologies are often used in deep water, deep well, hard rock, and brittle shale formations. In drilling these complex wells, the cost caused by V&S increases. According to past theories, indoor experiments, and field studies, the relations among ten kinds of V&S, which contain basic forms, response frequency, and amplitude, are summarized and discussed. Two evaluation methods are compared systematically, such as theoretical and measurement methods. Typical vibration measurement tools are investigated and discussed. The control technologies for drill string V&S are divided into passive control, active control, and semiactive control. Key methods for and critical equipment of three control types are compared. Based on the past development, a controlling program of drill string V&S is devised. Application technologies of the drill string V&S are discussed, such as improving the rate of penetration, controlling borehole trajectory, finding source of seismic while drilling, and reducing the friction of drill string. Related discussions and recommendations for evaluating, controlling, and applying the drill string V&S are made.

show abstract

“…Mechanical properties of shale, such as elastic modulus, hardness and strength, were evaluated based on the micro-indentation test [ 20 ]. Subsequently, the influencing factors of the shale micro-indentation test were evaluated [ 21 ]. As a comprehensive parameter, indentation hardness was the overall performance of the local mechanical response under certain conditions.…”

Section: Introductionmentioning

confidence: 99%

Research on the mechanical behaviour of shale based on multiscale analysis

Han

2018

R. Soc. open sci.

Self Cite

View full text Add to dashboard Cite

In view of the difficulty in obtaining the mechanical properties of shale, the multiscale analysis of shale was performed on a shale outcrop from the Silurian Longmaxi Formation in the Changning area, Sichuan Basin, China. The nano-/micro-indentation test is an effective method for multiscale mechanical analysis. In this paper, effective criteria for the shale indentation test were evaluated. The elastic modulus was evaluated at a multiscale and the engineering validation of drilling cuttings was performed. The porosity tests showed that the pore distribution of shale from the nanoscale to macro-pore could be better displayed by the nuclear magnetic resonance test. The micro-scale elastic modulus and hardness increased nonlinearly with the increase in the clay packing density. It was observed that the size effect of the micro-hardness was based on porosity and composition. The partial spalling of shale at the micro-scale could lead to irregular bulges or steps in a load–displacement curve. The elastic modulus of pure clay minerals was 24.2 GPa on the parallel bedding plane and 15.8 GPa on the vertical bedding plane. The contact hardness (pure clay minerals) was 0.51 GPa. The indentation results showed that the micro-elastic modulus of shale obeyed the normal distribution, and the statistical average could predict the macro-mechanical properties effectively. The present work can provide a new way to recognize the mechanical behaviour of shale.

show abstract

Influencing factor analysis of shale micro-indentation measurement

Cited by 29 publications

References 24 publications

Applications of Diamond to Improve Tribological Performance in the Oil and Gas Industry

Applications of Diamond to Improve Tribological Performance in the Oil and Gas Industry

A Review of the Evaluation, Control, and Application Technologies for Drill String Vibrations and Shocks in Oil and Gas Well

Research on the mechanical behaviour of shale based on multiscale analysis

Contact Info

Product

Resources

About