New Treatment for Improving the Productivity of Shale Reservoirs Using Thermochemical Fluids

2020 ◽  
Vol 143 (8) ◽  
Author(s):  
Amjed Hassan ◽  
Mohamed Mahmoud ◽  
Abdulaziz Al-Majed ◽  
Olalekan Alade ◽  
Esmail M. A. Mokheimer ◽  
...  
Keyword(s):  
Capillary Pressure ◽  
Thermochemical Treatment ◽  
Productivity Index ◽  
Rock Permeability ◽  
Rate Transient Analysis ◽  
Before And After ◽  
Shale Reservoirs ◽  
New Treatment ◽  
First Time ◽  
Hydrocarbon Productivity

Abstract Shale reservoirs are characterized with very low productivity due to the high capillary pressure and the ultra-low rock permeability. This article presents an effective treatment to improve the hydrocarbon productivity for shale reservoirs by injecting thermochemical fluids. In this study, several measurements were carried out to determine the effectiveness of the presented treatment. Coreflood, rate transient analysis (RTA), and nuclear magnetic resonance (NMR) measurements were performed. The gas productivity was estimated, before and after the treatment, utilizing the gas flowrates and the pressure drop across the treated rocks. The improvement in gas productivity due to thermochemical fluids was estimated by calculating the productivity index (PI) and the absolute open flow (AOF) before and after the chemical injection. Also, the changes in the pore size distribution, due to chemical injection, were studied using NMR measurements. Results showed that thermochemical treatment can improve the gas productivity by 44%, increase the AOF by 450%, and reduce the capillary pressure by 47%. Also, NMR measurements showed that fractures were induced in the shale rocks after the treatment, which will improve the shale productivity. Ultimately, this study introduces, for the first time, the use of thermochemical fluids to improve the hydrocarbon productivity for shale reservoirs.

Research on Number of High-Pressure Grouting of Hierarchical Multiple for Slope Based on Reliability Analysis

2014 ◽  
Vol 716-717 ◽  
pp. 363-369
Author(s):  
Zhen Hua Xie ◽  
Dong Yang ◽  
Sha Sha Liang ◽  
Zhi Yun Jia
Keyword(s):  
High Pressure ◽  
Rock Mass ◽  
System Analysis ◽  
Rock Surface ◽  
Rock Permeability ◽  
Iron Mine ◽  
Probability Calculation ◽  
Before And After ◽  
Pressure Grouting ◽  
First Time

The technology of hierarchical multiple high-pressure grouting is an effective approach to manage high and steep slope of broken rock mass. The number of grouting is one of the key parameters of this technology. By the analysis of mechanics and grouting theory, the anchoring effect mainly is affected by anchor slurry vein and the contact area with rock mass. Based on the system analysis of slurry vein development for first time and many times high-pressure grouting, the process flow for hierarchical multiple high-pressure grouting is put forward. Serve the rock permeability changes before and after grouting as an indicator measuring slurry and rock surface area, the method of determining grouting number based on the reliable probability is got. Combined with the engineering example of Shouyun Iron Mine, this paper puts forward the reliability criteria of working state of hierarchical multiple high-pressure grouting. Through the probability calculation, the best number of grouting is 4 times. The tests of permeability of rock mass and drawing force verify the accuracy of this determination method.

scholarly journals Effect of Ultrasonic Phacoemulsification on the Quality of Life of Patients with Nuclear-Cortical Cataract

2021 ◽  
Vol 18 (2) ◽  
pp. 325-330
Author(s):  
N. M. Agarkov ◽  
M. M. Yablokov ◽  
D. A. Konyaev ◽  
E. V. Popova
Keyword(s):  
Quality Of Life ◽  
Role Playing ◽  
Intraocular Lenses ◽  
Mechanical Trauma ◽  
High Tech ◽  
Before And After ◽  
Treatment Technologies ◽  
New Treatment ◽  
First Time

Currently, there are negative trends in the incidence of cataract, which, along with glaucoma, is the most common cause of visual impairment in various countries. Cataract prevalence continues to be high, necessitating the search for new treatment technologies and criteria for assessing the health and quality of life of this population. The purpose: to study the quality of life of patients with cataract against the background of ultrasonic phacoemulsification with implantation of soft intraocular lenses. Nei-VFQ-25 quality of life was studied in 182 patients with nuclear–cortical form of cataract before and after ultrasonic phacoemulsification. The integral index and components of the quality of life of patients with cataract before treatment are significantly reduced. The quality of life of patients with cataracts significantly increases in 3 months after surgical treatment in all indicators. Especially vision significantly improved in the distance, near vision, General health. Improving the quality of life of patients with cataracts after treatment indicates the effectiveness of the used ultrasonic phacoemulsification. In this case, the cause is a violation in the field of role-playing physical and emotional functioning. In the long-term period (6 months after treatment) there is an improvement in the quality of life of patients with mechanical trauma in many respects, except for the role of physical functioning. This study for the first time revealed the effect of ultrasonic phacoemulsification with implantation of soft intraocular lenses on the quality of life of patients with cataract. For the first time using a specific questionnaire NEI-VFQ-25 revealed the scale on which there is an improvement in the quality of life after surgery. The leading indicators of quality of life of patients with cataracts, characterizing the effectiveness of treatment with high-tech method of ultrasonic phacoemulsification, were established for the first time. 

Untersuchungen zur Quantifizierung der Änderung der Skelettmuskeldurchblutung nach Gefäßrevaskularisationen mit einem 99mTechnetiummarkierten Tracer

1990 ◽  
Vol 29 (05) ◽  
pp. 215-220 ◽  
Author(s):  
R. Benning ◽  
K. Nagel ◽  
M. Jugenheimer ◽  
S. Fischer ◽  
S. Worthmann ◽  
...  
Keyword(s):  
Transluminal Angioplasty ◽  
Lower Limbs ◽  
Surgical Patients ◽  
Treadmill Test ◽  
Negative Results ◽  
Clinical Observations ◽  
Before And After ◽  
Comparative Results ◽  
First Time ◽  
Percutaneous Transluminal

A new 99mTc-labelled tracer (99mTc-Sestanriibi) was used for the first time to demonstrate the perfusion of the skeletal muscle. In 16 patients with obstructive atherosclerosis of the lower limbs the change of perfusion of thigh and lower leg was studied with SPECT before and after vascular surgery (n = 11) or percutaneous transluminal angioplasty (n = 5). Comparative results of scintigraphic measurements and clinical observations (ancle-arm pressure, treadmill test) in 10 surgical patients (14 operated legs) showed correct positive or negative results in 86% (12/14).

Impact of merger on efficiency and productivity : a case study of commercial banks in Malaysia

1970 ◽  
Vol 5 (1) ◽  
pp. 77
Author(s):  
Mahadzir Ismail ◽  
Saliza Sulaiman ◽  
Hasni Abdul Rahim ◽  
Nordiana Nordin
Keyword(s):  
Efficiency Score ◽  
Malmquist Productivity Index ◽  
Productivity Index ◽  
Data Envelopment ◽  
Master Plan ◽  
Before And After ◽  
Domestic Banks ◽  
The Impact ◽  
Efficiency And Productivity

The Financial Master Plan (2001- 2010) aims to enhance the capacity of banking industry so that higher effic iency and productivity can be reaped in the future. This study seeks to determine the impact of merger on the efficiency and productivity ofcommercial banks in Malaysia for the period 1995 until 2005. The study uses a non-parametric approach, nam ely DEA (data envelopment analysis?) to estimate the efficiency scores and to construct the Malmquist productivity index. To enable this estimation, three bank inputs and outputs are used. Amongst the findings are those banks exhibit higher efficiency score after the merger and thefo reign banks are more efficient than the local banks. Productivity of the banks is calculated in both periods, before and after the merger: The results show that, it is the local banks that have improved the most after the merger. The main source of productivity is technical change or innovation. The findings support the existing policy of having larger domestic banks in term of size.

Trombodynamics Method in the Assessment of Coagulation Parameters in Psychopharmacotherapy of Endogenous Mental Disorders

Psychiatry ◽  
2020 ◽  
Vol 18 (4) ◽  
pp. 16-25
Author(s):  
N. S. Karpova ◽  
O. S. Brusov ◽  
I. V. Oleichik ◽  
M. I. Faktor ◽  
N. S. Levchenko ◽  
...  
Keyword(s):  
Mental Disorders ◽  
Response To Therapy ◽  
Procoagulant Activity ◽  
Coagulation Activity ◽  
Continuous Type ◽  
Chronic Neuroinflammation ◽  
Psychopharmacological Treatment ◽  
Before And After ◽  
First Time ◽  
Schizotypal Disorder

Background: currently, it has been proven that the pathogenesis of endogenous mental disorders is associated with the process of neuroinflammation in the brain of patients. It is also known that chronic neuroinflammation, accompanied by a violation the permeability of the blood-brain barrier. It is accompanied by the activation of platelets that generate procoagulant microparticles, which leads to a disturbance of the hemostasis system, causing an increase in blood clotting in patients. Objective: to investigate the dynamics of procoagulant activity of blood in patients with endogenous mental disorders before and after psychopharmacotherapy.Patients and methods: the study included 185 patients aged 16 to 64 years with the following mental disorders: schizophrenia with attack-like/attack-progressive/continuous type of course (F20.00–2), affective disease (F31.1–5; F32.0–3; F33.0–3), schizotypal disorder with affective fluctuations (F21.3–4). The thrombodynamic test (TD) was performed on T-2 Trombodynamis device according to the manufacturer’s instructions (Hemacore LLC, Moscow, Russia). All patients received standard pharmacotherapy according to their condition.Results: a significant decrease of procoagulant activity of spontaneous clots in the patients’ blood after psychopharmacological treatment is observed. Our data on the positive dynamics of changes in the values of TD test’s indicators in most of the examined patients suggest that a decrease in the coagulation activity of the patients’ blood as a result of treatment may be associated with the anti- inflammatory effect of antipsychotics and antidepressants.Conclusion: for the first time, it was shown that there is a positive dynamic in changing the values of the main parameters of the TD test in most patients with endogenous mental diseases. The results of TD tests can be the basis for monitoring the response to therapy.

scholarly journals Antimicrobial Activity of L-Lysine and Poly-L-Lysine with Pulsed Electric Fields

2021 ◽  
Vol 11 (6) ◽  
pp. 2708
Author(s):  
Jurgita Švedienė ◽  
Vitalij Novickij ◽  
Rokas Žalnėravičius ◽  
Vita Raudonienė ◽  
Svetlana Markovskaja ◽  
...  
Keyword(s):  
Electric Fields ◽  
Pulsed Electric Fields ◽  
Antimicrobial Treatment ◽  
Treatment Development ◽  
E Coli ◽  
Yeast Fungi ◽  
New Treatment ◽  
First Time ◽  
Resistant Microorganism ◽  
Susceptibility Patterns

For the first time, the possibility to use L-lysine (Lys) and poly-L-lysine (PLL) as additives with pulsed electric fields (PEF) for antimicrobial treatment is reported. The antimicrobial efficacy of Lys and PLL for Escherichia coli, Staphylococcus aureus, Trichophyton rubrum and Candida albicans was determined. Inactivation of microorganisms was also studied by combining Lys and PLL with PEF of 15 and 30 kV/cm. For PEF treatment, pulses of 0.5, 1, 10 or 100 μs were applied in a sequence of 10 to 5000 at 1 kHz frequency. The obtained results showed that 100 μs pulses were the most effective in combination with Lys and PLL for all microorganisms. Equivalent energy PEF bursts with a shorter duration of the pulse were less effective independently on PEF amplitude. Additionally, various treatment susceptibility patterns of microorganisms were determined and reported. In this study, the Gram-negative E. coli was the most treatment-resistant microorganism. Nevertheless, inactivation rates exceeding 2 log viability reduction were achieved for all analyzed yeast, fungi, and bacteria. This methodology could be used for drug-resistant microorganism’s new treatment development.

scholarly journals Influences of the selected additives on the weight loss and organoleptic properties of marinated mussels and squids

2012 ◽  
Vol 81 (3) ◽  
pp. 263-267 ◽  
Author(s):  
Metin Guldas ◽  
Canan Hecer
Keyword(s):  
Weight Loss ◽  
Salt Content ◽  
Meat Products ◽  
Organoleptic Properties ◽  
Highest Weight ◽  
Konjac Flour ◽  
Weight Gains ◽  
Before And After ◽  
Mouth Feel ◽  
First Time

Effects of seven different solutions prepared from various additives (carrageenan, konjac flour, phosphate, yeast extract, xanthan gum and maltodextrin) were used to test for the first time in the marination of experimental seafood. The additives were added into the marination solutions and the samples were analyzed before and after marination. Statistically, the experimental solutions did not cause significant changes in pH, acidity and salt content of the samples (P < 0.05). The highest weight gains were obtained from the solution which contained 0.1% of konjac flour (E425 I) as 4.01, 5.21, 4.61 and 4.88 % in the mussels, big squids, diced squids and small squids, respectively. However, this solution was not preferred by the panellists because of its sticky texture. Inversely to red meat products, the solution containing phosphate caused weight loss during marination. The results indicate that the solution containing 0.2% carrageenan LM (low methoxyl) was the best solution in the marination process. Dipping into this solution caused weight gains of 4.69, 2.98, 4.04 and 2.78% in the big squids, the mussels, the small squids and the diced squids, respectively (P < 0.01). The organoleptic properties (mouth feel, flavour and softness) of mussels and squids were also improved by carrageenan LM addition.

The effects of dehydration and local soil on parasite recovery: A preliminary paleoparasitological evaluation on experimental coprolites

The Holocene ◽  
2021 ◽  
pp. 095968362110499
Author(s):  
Darío Alejandro Ramirez ◽  
Mariana Fabra ◽  
Samanta Xavier ◽  
Alena Mayo Iñiguez
Keyword(s):  
Equal Mass ◽  
Central Argentina ◽  
Soil Sediment ◽  
Local Soil ◽  
Before And After ◽  
Fresh Feces ◽  
Flotation Technique ◽  
First Time ◽  
Taphonomic Processes

Experimental paleoparasitological approaches have been used in order to optimize the methodology previously to the application in archeological samples. In this study we evaluated the action of dehydration and local soil (Central Argentina) on the loss of parasite eggs in experimental coprolites, using two parasitological techniques: spontaneous sedimentation and sucrose-flotation. Experimental coprolites comprised fresh human feces, positive for Hymenolepis nana, Ascaris sp., and Enterobius vermicularis, submitted to controlled artificial dehydration. Experimental coprolites with soil addition were prepared by mixing archeological sediment with equal mass of fresh feces. Helminth eggs were counted and eggs per gram were estimated in each subsample. Statistical analyses were applied to compare subsamples before and after desiccation and with and without addition of soil sediment. The performance of parasitological methods statistically differed, the sucrose flotation technique being the less effective when fresh feces and experimental coprolites were analyzed. Partial deformation of eggs was observed via both techniques only in subsamples containing H. nana eggs. However, this was not seen in Ascaris sp. subsamples, possibly due to eggshell composition. We found that sample desiccation significantly decreased the number of eggs in the experimental coprolites. Mixing archeological sediment with the fecal material also resulted in significantly fewer eggs surviving, independent of desiccation. This shows that climate and soil in which archeological fecal samples are found can strongly influence the survival of parasite eggs from past populations. The small amount of parasite evidence often found in paleoparasitological analyses, including Central Argentina, could be attributed to the action of taphonomic processes rather than to the real absence of infection in these ancient populations. Importantly, the study highlights the role of local soil, confirmed for the first time by empirical data. The research provides valuable insights into the understanding of the paleoparasitological results of the region and of general paleoparasitology.

Sign in / Sign up

Export Citation Format

Share Document