Hydraulic fracturing technology has played a pivotal role as key in shale gas development, but the geological environmental problems caused have been worrying public. This paper proposes an advanced step rectangular pulse hydraulic technique, which can achieve higher pressure and more complex fractures by pumping lower energy fluid. The results indicate that propagation of be divided into stabl...

Hydraulic fracturing is a method of oil and gas extraction from shale in which substantial volumes of water return to the surface containing chemicals and microorganisms. This paper begins to address the microbial composition and aqueous chemistry and the potential for intrinsic and enhanced bioremediation of these waters. The waters from a gas and oil shale in the Marcellus and Bakken regions,...

Engineering estimates of methane emissions from natural gas production have ledto varied projections of national emissions. This work reports direct measurements

S tight reservoir is rich in oil and gas has good development potential. However, the lacks physical property, strong heterogeneity, lithology complex formation conditions, fracturing operation characterized by lack of fracture complexity difficulty initiation. For geological characteristics difficulties reconstruction, we actively follow principle fracture-controlled reserves, broaden understa...

Supercritical CO2 phase change fracturing technology has been widely used in rock engineering. However, the surface vibration characteristics induced by breaking have not sufficiently studied. In this paper, a model for calculating velocity supercritical was established based on time-domain recursive method, and reliability of verified using LS-DYNA nonlinear finite element software; blasting e...

In many reservoirs, an increase in permeability and conductivity is achieved by hydraulic fracturing/stimulations which open cracks and fractures that then act as pathways for fluids to navigate in the subsurface. Mapping, localization, and general characterization of these fracture systems is of key importance in oil, gas, and geothermal energy production. The location of the microseismic even...

in this research, energetic andexergetic analysis of calcium oxide formation, co2 emissions, andenvironmental effects during the clinker production process in rotary kilnare investigated. first the energy and exergy analysis of rotary kiln were carried out according to the first and second law of thermodynamics based on dead state, respectively. consequently, the amount of co2 emissions associa...

The modeling of coupled fluid transport and deformation in a porous medium is essential to predict the various geomechanical process such as CO2 sequestration, hydraulic fracturing, so on. Current applications interest, for instance, that include fracturing or damage solid phase, require nonlinear description large deformations can occur. This paper presents variational energy-based continuum m...