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- Optimization of an in-situ polymerized and crosslinked hydrogel formulation for lost circulation control: Dataset and AnalysisLost circulation is a recurring problem during well drilling. This work proposed a new gel formulation, and optimizes its composition using a fractional design of experiments. The gel was analyzed using rheology and nuclear magnetic resonance (NMR). The responses were the maximum elastic modulus (G'max), plateau G', gelation time according to the Hill5 model, gel stability (%), gelation time obtained from NMR and the presence of syneresis, also obtained from NMR. Models were created considering the main effects and first order interactions, and showed a very high coefficient of determination, over 0.95. A more detailed ANOVA can be found in the paper. In general, pH and amount of acrylic acid are the most significant effects, but the amount of ammonium persulfate (APS), chromium (III) salt and carboxymethylcellulose are also relevant. The rheological properties match or are higher than those from the literature, showing this formulation is a good candidate for lost circulation control. A set of optimal gel compositions can be obtained from the data, depending on the desired characteristics of the gel, such as its gelation time and viscoelastic properties. These can be used for further tests under high temperatures and pressures, such as a breakthrough pressure test.
- Data for: Rarefied Gas Transport in Heterogeneous Shale Matrix Using a Practical Apparent Permeability Model and Fuzzy Statistical Methodmass flux ratio data vs Knudsen number
- Data for: Geochemical characteristics comparison between gas from fluid inclusions and wells and its significance for carbon isotope reversal in the Yan'an gas field of the southern Ordos Basin, ChinaComponents and carbon isotopic values of natural gas.
- Data for: Organic geochemistry and gas prospectivity of Permian source rocks in the western margin of the Songliao Basin, northeastern ChinaThe Permian in western margin of Songliao Basin is a strategic potential field of oil and gas resources in northeastern China, but the systematic researches since few boreholes were drilled up to Permian strata, as well as there is a lack of seismic and well-logging data. This paper presents the lithological composition of the Permian Formations on the basis of regional geological survey in western margin of Songliao Basin.
- Data for: Numerical Simulation and Correction of Electric Logging Under the Condition of Oil-based Mud Invasionfigure data of manuscripts
- Data for: Microscopic mechanism of methane adsorption in shale: Experimental data analysis and interaction potential simulationThe specific surface area and the maximum methane adsorption capacity of shale samples.
- Data for: Log Data-Driven Model and Feature Ranking for Water Saturation Prediction Using Machine Learning ApproachIt is helped to estimate water saturation.
- Data for: A new fracture permeability model: influence of surrounding rocks and matrix pressureFracture permeability model considering the effects of surrounding rocks and varying matrix pressure.
- Data for: Polyacrylamide Gel System Formed by Cr(III) and Phenolic Resin for Water Control in High-Temperature ReservoirsIt can be seen from this curve that the blocking rate of the gel system can reach more than 99%.
- Data for: Polyacrylamide Gel System Formed by Cr(III) and Phenolic Resin for Water Control in High-Temperature ReservoirsThis figure is an infrared spectrum of a polyacrylamide gel. The four curves are polyacrylamide (without cross-linker), polyacrylamide and chromium acetate + phenolic resin cross-linker, polyacrylamide and chromium acetate cross-linkert, polyacrylamide and phenolic resin cross-linker.
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