scholarly journals Evaluation of hydraulic fracturing results based on the analysis of geological field data

Georesursy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 8-14
Author(s):  
Inna N. Ponomareva ◽  
Dmitry A. Martyushev
Keyword(s):  
Hydraulic Fracturing ◽  
Significant Contribution ◽  
Total Production ◽  
Single Crack ◽  
Development System ◽  
Physical Conditions ◽  
Reservoir Development ◽  
Technological Characteristics ◽  
Drainage Zone ◽  
Different Parts

The relevance of the research is specified by the significant contribution of the oil produced as a result of hydraulic fracturing in the wells in its total production. A correct assessment of the results of actually carried out hydraulic fracturing will allow to develop clear recommendations on the further application of this method of oil production enhancement for the geological and physical conditions of specific fields. It was established that hydraulic fracturing in the well 221 of the Shershnevsky field (the Perm Territory, Russia) led to a change in interaction between wells within the entire element of the development system; it began to work as a single coordinated system. As a result of hydraulic fracturing, there was not just a redistribution of fluid drainage volumes. A synergistic effect arose when fracturing in one well led to an increase in fluid flow rates and coordinated operation of the entire element of the development system. It is likely that hydraulic fracturing in the well 221 led to a significant change in the geological and technological characteristics of the Bobrikovskian deposit of the Shershnevsky field to a greater extent than the volume of the drainage zone of this well. A whole system of channels with reduced filtration resistances appeared instead of a single crack, as is common in the classic representation of hydraulic fracturing. It should be noted that the approach presented in the article is the first very important step in a comprehensive analysis of the effective reservoir development based on the results of field monitoring. In the future, it is necessary to attract more detailed information about the interaction of wells. Only such a multilevel analysis will allow to substantiate the general conclusion about the hydraulic fracturing on the development of a reservoir and to confirm conclusively the effect of wells on each other, which can be individual in different parts of the reservoir.

Somatic diseases and suicidal behaviour

2021 ◽  
pp. 321-332
Author(s):  
Elsebeth Stenager ◽  
Egon Stenager ◽  
Annette Erlangsen
Keyword(s):  
Mental Disorders ◽  
Suicidal Behaviour ◽  
Children And Youth ◽  
Medical Settings ◽  
Physical Conditions ◽  
Pain Syndromes ◽  
The Us ◽  
Somatic Disorders ◽  
Somatic Diseases ◽  
Different Parts

The association between somatic disorders and suicidal behaviour has been examined in many studies. Despite large variation in quality and study design, recent studies have improved our knowledge substantially, not only regarding the extent of risk but also factors influencing the risk. Most studies have been conducted in European countries, the US, Australia, Japan, and South Korea. A series of studies have examined suicide risk in relation to somatic disorders of older persons, while others addressed somatic disorders and attempted suicide in children and youth. Physical conditions may play an important role in medical settings, regardless of whether mental disorders are present or not, though especially when mental disorders are present. This chapter presents a review of present knowledge on suicide and suicidal behaviour in selected somatic disorders and pain syndromes, with a focus on studies from different parts of the world.

Tailored Workflow for Optimizing the Hydraulic Fracturing in Tight Reservoir Development: A Case Study from Cambay Basin

2019 ◽  
Author(s):  
Vivek Pandey ◽  
Sunil Kumar Dimri ◽  
Dinesh Kumar Mathur ◽  
Raman Kumar Singh ◽  
Ankit Dutt ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Cambay Basin ◽  
Reservoir Development ◽  
Tight Reservoir

scholarly journals Diagnostics of active and eruptive prominences through hydrogen and helium lines modelling

2008 ◽  
Vol 26 (10) ◽  
pp. 2961-2965 ◽  
Author(s):  
N. Labrosse ◽  
J.-C. Vial ◽  
P. Gouttebroze
Keyword(s):  
Thermodynamic Equilibrium ◽  
Local Thermodynamic Equilibrium ◽  
Transfer Problem ◽  
Incident Radiation ◽  
Velocity Fields ◽  
Plasma Parameters ◽  
Radiative Transfer Problem ◽  
Physical Conditions ◽  
Integrated Intensities ◽  
Different Parts

Abstract. In this study we show how hydrogen and helium lines modelling can be used to make a diagnostic of active and eruptive prominences. One motivation for this work is to identify the physical conditions during prominence activation and eruption. Hydrogen and helium lines are key in probing different parts of the prominence structure and inferring the plasma parameters. However, the interpretation of observations, being either spectroscopic or obtained with imaging, is not straightforward. Their resonance lines are optically thick, and the prominence plasma is out of local thermodynamic equilibrium due to the strong incident radiation coming from the solar disk. In view of the shift of the incident radiation occuring when the prominence plasma flows radially, it is essential to take into account velocity fields in the prominence diagnostic. Therefore we need to investigate the effects of the radial motion of the prominence plasma on hydrogen and helium lines. The method that we use is the resolution of the radiative transfer problem in the hydrogen and helium lines out of local thermodynamic equilibrium. We study the variation of the computed integrated intensities in H and He lines with the radial velocity of the prominence plasma. We can confirm that there exist suitable lines which can be used to make a diagnostic of the plasma in active and eruptive prominences in the presence of velocity fields.

The Study and Application of Massive Hydraulic Fracturing Technique in Y104-6 Well Glutenite Formation

2013 ◽  
Vol 734-737 ◽  
pp. 1498-1502
Author(s):  
Cong Lu ◽  
Jian Chun Guo ◽  
Ren Jiang Xue ◽  
Jian Wang
Keyword(s):  
Hydraulic Fracturing ◽  
Economic Benefit ◽  
Material Selection ◽  
Oil Production ◽  
Thick Section ◽  
Geological Characteristics ◽  
Recoverable Reserves ◽  
Reservoir Development

Aiming at the southern areas of Bohai glutenite reservoir natural capacity is low, without obvious interlayer, filter lost badly, cause conventional hydraulic facturing in short of effect on increasing production, the paper conducted the research and application of technology on Y104-6 well. According to the reservoir geological characteristics and well conditions, the paper studied on fracturing scale determination, the perforating section, and the optimization of fracturing material selection, and application. Completed the injection into well fluid amount 1491.9 m3, proppant 188 m3, displacement of pump 7.5 m3/min. After treatment, average fluid flowing production achieved 18.6 t/d, average daily oil production 6.8 t, stimulate effect and the economic benefit is remarkable. This well fracturing technology, make the successful application of the southern areas of Bohai glutenite reservoir a significant breakthrough, recoverable reserves get promoted for big thick section glutenite reservoir development and vertical fracturing of the organization and implementation has provided valuable experience.

scholarly journals Methodological approach to optimal geological and technological characteristics determining when planning hydraulic fracturing at multilayer facilities

2021 ◽  
pp. 182-191
Author(s):  
V. A. Grishchenko ◽  
◽  
R. U. Rabaev ◽  
I. N. Asylgareev ◽  
V. Sh. Mukhametshin ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Methodological Approach ◽  
Oil Fields ◽  
Hydraulic Fractures ◽  
Reservoir Properties ◽  
Effective Power ◽  
Stage Of Development ◽  
Technological Characteristics ◽  
Specific Loading ◽  
Geological Conditions

The paper considers the issue of increasing the hydraulic fracturing efficiency in a multilayer facility at the final stage of development with an uneven degree of reserves development along the section. Based on the results of the analysis, it was found that the upper layers, which have the worst filtration-reservoir properties, are less developed in comparison with the highly productive lower ones. When hydraulic fracturing was carried out in the upper formations, some of the operations had low success due to the breakthrough of hydraulic fractures into the lower depleted formations. On the basis of the revealed dependencies, the work determined the optimal specific loading of proppant per meter of effective power, depending on the geological conditions, and maps of the prospects for hydraulic fracturing are built. Keywords: oil fields development; hydraulic fracturing; hydraulic fracturing optimization; multilayer facilities.

Sign in / Sign up

Export Citation Format

Share Document