... unconventional resource economics co 2 recovery factor bakken formation unconventional reservoir oil recovery sagd permeability oil shale mechanism recovery incremental oil recovery injection society of petroleum engineers Introduction A revolution of unconventional reservoirs is a turning...

... of natural fractures intensity as CO 2 . Furthermore, due to the small molecular weight of NGs, they do not require very large contact areas as CO 2 does. This study explains the effects of different nano and macro mechanisms on the performance of CO 2 -EOR and natural-gases EOR in unconventional reservoirs...

... experiments available in the literature. Once validated, the model is used to perform numerical experiments demonstrating the effects of transport mechanisms during injection of N 2 and CO 2 mixtures. We evaluate average pressure, breakthrough times and chromatographic separation effects in the presence...

... pressure, changes in the C1/C2 ratio occur along with liquid yields changes appearing to indicate that the liberation of adsorbed gas in effect. enhanced recovery gas injection method isotherm composition reservoir simulation organic matter complex reservoir mechanism shale gas Upstream Oil...

... the atmosphere. This option creates economic benefit from the waste CO 2 , vs. pure disposal for sequestration. Organic rich shale reservoirs are an attractive target for carbon storage, due to their adsorptive abilities and multiple mechanisms for gas storage. CO 2 has been widely used in oilfield operations...

...Gas transport mechanisms in micro fractures Pressure varies in micro fractures with the aperture of nano-micro scale distribution 2 , 3 , 4 , 9 , 10 , 11 during the development of gas reservoirs. 12 , 13 The typical value of Knudsen number ( K n) ranges from 0.00005 to 2. 14...

... complex reservoir Cipolla hydraulic fracturing overburden stimulation reservoir geomechanics microseismic cloud horizontal stress anisotropy shale mechanism plane geometry SRV fracture network complexity society of petroleum engineers natural fracture stress anisotropy hydraulic...

... Abstract Shale gas reservoirs are fine-grained, organic-rich rocks with a well-developed pore network structure within the organic matter (kerogen). Organic pores in shale reservoirs exhibit small radii in the range of 0.5 to 100 nanometers, which indicate that non-Darcy flow mechanisms...

... and spontaneous imbibition farther into the formation rocks. With the additional initiation of microcracks and access to hydrocarbon reserves, initial production can be enhanced and production declines, over time, can also be mitigated. In this study, new mechanisms for surfactants to initiate microcracks...

... mechanism provided by dissolved gas in kerogen. All these storage mechanisms must be considered for estimation of original gas in place (OGIP). Otherwise pessimistic values of OGIP and recoveries will be obtained by ignoring any of these mechanisms. This paper presents a new easy-to-use Material Balance...

... with a single stage and are coloured with their mechanism, red for opening event, green for shear, and blue for compaction or closure events. The goal of most completion programs is to generate fracture length with a large number of tensile crack opening fractures and to minimize energy into fracturing...

... part of the reservoir because of osmotic pressure while high salinity makes the clay surface extremely hydrophobic and causes local oil-wetness. Upstream Oil & Gas mechanism Williston Basin flow in porous media pore porosity saturation sample 4 enhanced recovery Brine experiment...

... and swap during tripping also cause damage to cement sheath. Abstract The primary objective of a cementing job is to create a stable mechanical link between the casing and formation. This link provides a strong support for the casing and isolates different zones to prevent any contamination...

... or connected by hydraulic fracturing (HF) stimulation. In practice, the reactivated natural fracture network is often identified using the microseismicity (MS) monitored during the stimulation. However, the fundamental mechanisms of MS generation and focal mechanisms inferred from geophysical analysis near...

... Abstract This article presents the development of laboratory tests and workflow methodologies at Pemex E&P to identify the type and mechanism of formation damage arising during the production life of oil and gas wells in carbonate and sand formations. More than 130 workflow procedures were...

... 2 flow could essentially eliminate the displacement mechanisms responsible for increased recovery in conventional reservoirs. As such, other mechanisms must be optimized in tight reservoirs such as the Bakken. Conceptual steps for the Bakken include: (1) CO 2 flows into and through the fractures...

... at a prescribed temperature may occur by various mechanisms depending on pore size and bulk pressure including Knudsen diffusion, transitional flow, slip flow, viscous flow, adsorbed- phase diffusion, and liquid viscous or condensate flow ( Civan, 2011 ). Therefore, pores in shale matrix that are small relative...

... an immovable bed at the bottom of the fracture. Three assumptions are often made regarding required conductivity, proppant transport mechanisms and cost trade-offs in unconventional reservoirs, namely: Proppant pack conductivity is unimportant because hydraulic fractures in ultra-low permeability...

... source mechanisms and event parameters. We examine changes in calculated bottomhole instantaneous shut-in pressure (ISIP) gradient near faults and the associated change in microseismic behavior. Stress regime, maximum horizontal stress (S Hmax ) directions and stress magnitudes along faults are examined...

... that the initial reservoir pressure of shale gas reservoirs is between 2.76 and 68.95MPa, as shown in Figure 1 . Abstract The transport mechanism of gas moving through matrix pores is the bottleneck of conquering the difficulties in shale gas development. The matrix pores can be divided into organic...