-CEC of different shale types | Download Table - ResearchGate
Interactions between aqueous drilling fluids and clay minerals have been identified as an important factor in wellbore instability of shale formations. Current wellbore stability models consider...
(PDF) Shale Characterization Methods Using XRD, CEC, and LSM ...
In this study, we evaluate the effectiveness of three methods for shale characterization: X-ray diffraction (XRD), cation exchange capacity (CEC), and linear swell meter (LSM). The study was conducted on a set of shale samples from a specific location.
Shale problems and water-based drilling fluid optimisation in …
2010年8月1日 · Shale testing helps to develop inhibitive WBM systems. In our study, among all the techniques mentioned before, two methods were used: hot-rolling dispersion test and pellet test.
fracturing operations. In this study, we evaluate the effectiveness of three methods for shale characterization: X-ray diffraction (XRD), cation exchange capacity (CEC), and linear swell meter (LSM). The study was conducted on a set of shale samples from a specific location.
There may be a tendency in engineering studies of shale to emphasize quantitative values such as CEC and semi-quantitative measures, such as percent mineral composition from X-ray diffraction.
Experimental features of cation exchange capacity determination …
2020年11月1日 · We experimentally show (Fig. 8, Table 3) that for shale rock samples, the CEC varies with crushing and depends on the fraction size range. CEC increases as the rock is disaggregated and ground to smaller and smaller fraction sizes. The SSA also increases for the finer rock fraction (Table 4).
(PDF) Identification of Drilling Efficiency Using Log-Derived Cation ...
2021年9月19日 · Drilling in shale sections in many cases causes wellbore instability and slow drilling problems. In this study, cation exchange capacity of shale is estimated using a relatively simple...
Shale/Mud Inhibition Defined With Rig-Site Methods
This paper discusses techniques used to evaluate shales and muds at the rig site and presents the procedures, results, and parameters that affect each technique. Information concerning a new device for measuring shale swelling and the procedure for reconstituting shale cuttings is given.
Typical CEC values for various clay and sand [11]. - ResearchGate
Shale formation intervals with high fracability are good candidates for the combination of horizontal well positioning with multi-stage hydraulic fracking.
In this work, the solutions are used to investigate the effects of fracturing fluid chemistry and formation clay content on the fracture deformation and the stresses distributions inside the shale formation.