Conventionally, high-pressure water-based fluids have been injected for hydraulic stimulation of unconventional petroleum resources such as tight gas reservoirs. Apart from improving productivity, frac-fluids caused environmental and technical issues. As a result, much the interest has shifted towards alternative frac-fluids. In this regard, n-heptane, an frac-fluid, is proposed. It necessitate...

Nano-clean fracturing fluids have broad application potential in coalbed methane reservoir owing to their high stability, good temperature resistance, low filtration loss, and strong frictional resistance reduction. However, the sand-carrying regularity of nano-clean reservoirs is unclear, especially for complex fractures with variable directions. This study established a sand transport model t...

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...

This study aimed to reveal the anisotropic permeabilities of tight oil reservoirs impacted by heterogeneous minerals. SEM imaging, image processing, fractal calculation, microscopic reservoir modeling, and visual flow simulation were carried out investigate above problems. Results show that variation coefficient two-dimensional permeability for studied samples ranges from 0.09 0.95, with an ave...

Abstract This article discusses the solution to problem of active proppant removal from a hydraulic fracture into wellbore. To reduce amount removed not only at stages well development, but also during its operation, it is proposed compact pack in created with elastic waves, which can be generated using spool vibrator. Well treatment according technology described makes possible attract additio...

The low permeability and thinly interbedded reservoirs have poor physical properties strong heterogeneity, it is difficult to control the hydraulic fracture (HF) height width during fracturing, which affects effect of HF penetration sand addition. In this work, a three-dimensional fluid–solid fully coupled propagation model established simulate influence interlayer heterogeneity on vertical wid...

There has been little interest in the application of hydraulic fracture treatment in Iranian oil fields, thanks to the primarily suitable production rates of the vast oil fields. In this paper, hydraulic fracturing treatment was simulated by different models for a carbonate reservoir in the southwest of Iran. Suitable pay zones were nominated based on the lithology, water-oil saturation, geomec...