Abstract Hydraulic fracture propagation has a great influence on reservoir reconstruction in shale gas exploitation. The study mechanism of hydraulic is important. Based the fluid-solid coupling theory, criterion under pressure deduced this paper. In combination with large-scale true triaxial experiment and numerical simulation, law researched, obtained. results show that will produce tensile f...

Shale gas extraction involves the drilling of organic-rich, lowpermeability shale and then stimulation of hydraulic fractures that allows gas to be produced. Methane in aquifers located above the shale strata, for instance, in Pennsylvania, United States, has been attributed by some to be the result of contamination caused by the hydraulic fracturing process. The work by Osborn et al. (1) descr...

Hydraulic fracturing operations are performed to enhance well performance and achieve economic success from improved production rates the ultimate reserve recovery. To these goals, fluid is pumped into at pressures that result in creation of a hydraulic fracture. Fracturing selection presents main requirement for successful fracturing. The selected should create fracture with sufficient width l...

Tight hydrocarbon reservoirs require stimulation to improve the recovery of oil and gas resources. Hydraulic fracturing is a technique extensively employed in industry generate fractures including primary secondary fractures. To keep these open, proppants are used. However, some ractures very narrow for conventional penetrate prop, hence smaller called micro-proppants required. These can hydrau...

In 2000 and 2003, two massive hydraulic fracturing experiments were carried out at the European Geothermal Hot Dry Rock site at Soultz-sous-Forêts, France. The objective was to create a dense network of enhanced permeability fractures, which would form the heat exchanger. The injection of water in the fractured rock generated a high level of microseismic activity: around 30,000 and 90,000 micro...

Feasibility of using pressurized hydraulic fluid as a source of on-demand assistive power for hybrid neuroprosthesis combining exoskeleton with functional neuromuscular stimulation was explored. Hydraulic systems were selected as an alternative to electric motors for their high torque/mass ratio and ability to be located proximally on the exoskeleton and distribute power distally to assist in m...

Lowto ultralow-permeability formations require “special” treatments/stimulation to make them produce economical quantities of hydrocarbon, and at the moment, multistage hydraulic fracturing (MSHF) is the most commonly used stimulation method for enhancing the exploitation of these reservoirs. Recently, the slotdrill (SD) completion technique was proposed as an alternative treatment method in su...

The mechanical power output was measured from scaphognathite (SG = gill bailer) muscle L2B of the crab Carcinus maenas (L.). The work was determined from the area of the loop formed by plotting muscle length against force when the muscle was subjected to sinusoidal length change (strain) and phasic stimulation in the length cycle. The stimulation pattern (10 stimuli per burst, burst length = 20...

Long-period long-duration (LPLD) seismic events that have been observed during hydraulic stimulation of shalegas and tight-gas reservoirs appear to represent slow shear slip on relatively large faults. Within the limitations of the recording geometry, we determine the areas in the reservoirs where the events are located in two case studies in the Barnett shale. In one data set, LPLD events appe...

This paper presents a geostatistical approach to multi-directional aquifer stimulation in order to better identify the transmissivity ®eld. Hydraulic head measurements, taken at a few locations but under a number of different steady-state ̄ow conditions, are used to estimate the transmissivity. Well installation is generally the most costly aspect of obtaining hydraulic head measurements. There...