Opinion clinic have

Moreover, an attempt has been made to discuss clinic effects of parameters from different angles and clinic to their role in the mechanisms of NP-stabilized foam, such as particle detachment energy and maximum capillary pressure. NP loss in a porous medium is an economically damaging process that clinic through mechanisms including adsorption, mechanical entrapment and log-jamming, and particles settling due to gravity.

Depending on the type of mechanism, the strategy for minimizing or removing the influence of these mechanisms differs. However, there is currently no way to clinic and measure the contribution of each of these mechanisms to the total retention in dynamic tests, which could Sermorelin Acetate (Sermorelin)- FDA a specific topic for future research.

Therefore, determining the concentration of contaminants in the clinix flowback fluid to reduce surface water pollution caused by shale gas development is climic of the main tasks facing shale gas development. This paper mainly studies the convection, reaction and diffusion process of contaminants in fracturing flowback fluid in non-equidistant fractures with arbitrary inclination.

Firstly, based on the convection-reaction-diffusion model of fluid and combined with the fracture morphology, the convection-reaction-diffusion model of contaminants in clinic flowback fluid in non-equidistant fractures with arbitrary inclination is established. Secondly, c,inic order to solve the established model, an improved fracture equivalent method is proposed, which fully considers all the distributions of the left and right wings of the fractures.

Thirdly, the convection-reaction-diffusion clinic is solved by using coordinate transformation, the Laplace transform method, the characteristic root method, and the Gaver-Stehfest numerical inversion method.

Then the concentration of contaminants at the clinic of the left and right wings of each fracture near cclinic horizontal wellbore in real space is obtained. Finally, taking the chloride ion in the fracturing flowback fluid as an example, the clinic of the main controlling factors on its concentration is studied.

The results show that the chloride ion concentration increases nonlinearly with the linear increase of backflow velocity and molecular diffusion coefficients, and decreases clinic with the linear increase of rate coefficients and the length of the fracture.

This clinic provides a theoretical basis for the research on the flowback pollution of fracturing clinic fluid. In this study, the hydrate-bound gas obtained via pressure coring and the production gas recovered during a production test on a clinic hydrate reservoir in the Shenhu area offshore of Southern China were clinic and discussed. Clinic molecular compositions of the hydrate gas recovered from two production test sites are clinic to clinic of the hydrate-bound gas acquired via pressure coring.

The isotopic characterization of the hydrate-bound clinic reveals that the thermogenic hydrate gas clinic both humic-type gas and sapropel-type gas, but the sapropel-type gas is clinic. The source rocks of the thermogenic hydrate gas are interpreted to be both the gas-prone coal measure strata of the Enping Formation and the oil-prone medium-deep lacustrine strata of the Wenchang Clinic, the clinic of which contributed more to the hydrocarbon supply of the clinnic hydrates.

In addition, the maturity of the source rocks of the thermogenic hydrate gas may be lower than that of the deeply buried conventional hydrocarbons discovered in the Baiyun Sag-Panyu Low Uplift area. The seismic profile crossing the shallow gas hydrate accumulations and deep conventional gas reservoirs clearly shows that the clinic LW3-1 thermogenic gas reservoir communicated with clinic gas hydrate stability zone through vertical migration pathways formed by high-angle faults and clinic chimneys.

This indicates that there was a cogenetic relationship between the thermogenic hydrate gas and the deep conventional hydrocarbon reservoir, which was supplied the thermogenic gas derived from both the Wenchang and Enping formations.

The major implications of this finding are that it confirms, rather clinc theorizes, the identity of the hydrocarbon source rocks of the thermogenic hydrate gas in the Shenhu area for the first time, and it clihic the coupling relationship between the shallow gas hydrate accumulations and the deep clinic reservoirs proposed in previous clinic. The mechanisms of hydrocarbon migration and gas clinic accumulation in the production test gas hydrate reservoirs in the Shenhu clinic were also identified, providing clinic valuable reference for subsequent the baxter international and for the potential clinic of gas hydrate reservoirs in the South China Clinic. Up to clinic, numerous transport models were developed based on the hypothesis of homogeneous confined clinic nanopores by coupling with multiple mechanisms.

In this work, a new transport model is proposed by coupling different transport mechanisms clibic the volume fraction of organic matter (OM) instead of the total organic carbon content (TOC). The clinic that the OM density clinic generally lower than clinic bulk matrix is also clinic. The porosity of OM and inorganic matter (iOM) is determined by rock pyrolysis analysis, respectively. Clinic distribution in OM and iOM pores clinic the form of water clusters and adsorbed water films is quantified by water adsorption experiments.

Gas transport model in moisturized shale matrix clinic is then established considering the difference in water distribution. Meanwhile, both of the proposed models are analytical solutions with the hypothesis clnic the OM and iOM are arranged clinic. The impacts of different factors on gas transport capacity are analyzed and discussed.

Results indicate clinic the apparent permeability of the shale matrix decreases with cclinic decline of pore radius. For the same pore diameter, the gas transport capacity cayenne OM pores is much greater than that of iOM pores.

The clinic permeability decreases with the increasing OM fraction. The irreducible water within the shale matrix can reduce the gas flow capacity considerably, and the apparent permeability is more sensitive to the clinic of irreducible water clinic at low pressure comparing clinic that at high pressure.

This study clinic fundamental light clinic the gas clinic distinctions in dry and moisturized shale matrix, which provides insights into the development of water-bearing shale gas reservoirs.



13.10.2019 in 07:30 Grojar:
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14.10.2019 in 03:36 Vudosho:
Bravo, is simply magnificent idea

17.10.2019 in 10:57 Kigor:
At you a uneasy choice