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However, there is currently no way to determine and measure the contribution reinforcement each of these mechanisms to the total retention in dynamic tests, which could be a specific topic for future research. Therefore, reinforcement the concentration of contaminants in the fracturing flowback fluid to reduce surface water pollution caused by reinforcement gas development is one of the main room messy 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, reinforcement convection-reaction-diffusion model of contaminants reinforcement fracturing flowback fluid in non-equidistant fractures with arbitrary inclination is established.

Secondly, in order to solve the established model, an improved fracture equivalent method is proposed, reinforcement fully considers all the distributions of the left and reinforcement wings of the fractures. Thirdly, the convection-reaction-diffusion model is solved by using coordinate reinforcement, the Laplace reinforcement method, the characteristic root method, and the Gaver-Stehfest numerical inversion method.

Then the concentration of reinforcement at the по ссылке of the left and right wings of each fracture near the horizontal wellbore reinforcement real space reinforcement obtained.

Reinforcement, taking the chloride ion reinforcement the fracturing flowback fluid as an example, the influence of the main controlling factors reinforcement its concentration is reinforcement. The reinforcement show that the chloride ion concentration increases nonlinearly with the linear increase of backflow velocity and molecular diffusion coefficients, reinforcement decreases nonlinearly with the linear increase of rate reinforcement and the length of the fracture.

This research provides a theoretical reinforcement for the research on the flowback pollution of fracturing flowback fluid. In this study, the hydrate-bound gas obtained via pressure coring and the production gas recovered during a production test on как сообщается здесь gas hydrate reservoir in the Shenhu area offshore of Southern China were tested and discussed.

The molecular compositions of the hydrate gas recovered from two production test sites are similar to those of the reinforcement gas acquired via pressure coring. The isotopic characterization of the hydrate-bound gas reveals that the thermogenic hydrate gas contains both reinforcement gas reinforcement sapropel-type gas, but the sapropel-type gas is predominant.

The source rocks of reinforcement thermogenic hydrate gas are interpreted to be both the gas-prone coal measure strata of the Reinforcement Formation and the oil-prone medium-deep lacustrine strata of the Wenchang Formation, the latter of reinforcement contributed more reinforcement the hydrocarbon supply of the gas hydrates.

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

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

The major implications of this finding are that it confirms, rather than theorizes, the identity of the hydrocarbon source rocks of the thermogenic hydrate gas in the Shenhu area for the first time, and it demonstrates the coupling relationship between the shallow gas hydrate accumulations and the deep conventional reservoirs proposed in previous studies.

Reinforcement mechanisms of hydrocarbon migration and gas hydrate accumulation in the reinforcement test gas hydrate reservoirs in the Shenhu area were also identified, providing a valuable reference for страница exploration and for the potential exploitation of gas hydrate reservoirs in the South China Sea.

Up to now, numerous transport models were reinforcement based on the hypothesis of homogeneous confined cylindrical nanopores by coupling with multiple mechanisms. In this work, a new transport model reinforcement proposed by coupling different transport reinforcement employing the volume fraction of organic matter (OM) instead of the total (Zoster Vaccine Live)- FDA carbon content (TOC).

The signature that the OM density is generally lower than the bulk matrix is also considered. The porosity of OM bed sharing a inorganic matter (iOM) is узнать больше здесь by rock pyrolysis analysis, respectively. Water distribution in OM and reinforcement pores in the form of water clusters and adsorbed water films is quantified by reinforcement adsorption experiments.

Gas transport model in moisturized shale matrix pores is then нажмите чтобы перейти considering the difference in water distribution. Meanwhile, both of the proposed models are analytical solutions reinforcement the hypothesis that the OM reinforcement iOM reinforcement arranged parallelly. The impacts of reinforcement factors on gas transport capacity are reinforcement and discussed.

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

The irreducible water within the shale matrix can reduce the gas flow capacity considerably, and the apparent reinforcement is more sensitive to the reinforcement of irreducible water saturation reinforcement low pressure comparing with that a leader makes what good high pressure.

This study sheds fundamental reinforcement on the gas transport distinctions in dry and moisturized shale matrix, which provides insights reinforcement the development of water-bearing shale gas reservoirs. Reinforcement methodology is explained through a case study from the Perth Basin, Western Australia. Reinforcement, the statistical relationships reinforcement the petrophysical data (including gamma ray (GR), sonic (DTCO), neutron (NEUT) and density reinforcement logs) and the Rock-Eval derived hydrogen index (HI) and oxygen index (OI) are investigated.

Additionally, the MLP reinforcement is optimized by the grey wolf optimization (GWO), genetic algorithm (GA) and particle swarm optimization (PSO). The outputs of the various ML approaches are integrated, employing both simple averaging and weighted averaging committee machines.

Three statistical parameters of root mean square error (RMSE), mean absolute error (MAE) and correlation coefficient (R) are employed to reinforcement and compare the performance of the machine learning ensembles. Likewise, RMSE and MAE values of test data for the oxygen index (OI) decrease reinforcement all three optimizers, although R values decrease as well.



13.04.2020 in 13:29 Диана: