Decision analysis supports the use of drain amylase-based enhanced recovery method after esophagectomy

2018 ◽  
Vol 31 (10) ◽  
Author(s):  
B Jiang ◽  
V P Ho ◽  
J Ginsberg ◽  
S J Fu ◽  
Y Perry ◽  
...  
Keyword(s):  
Decision Analysis ◽  
Enhanced Recovery ◽  
Recovery Method ◽  
Drain Amylase

scholarly journals The Fast Potential Evaluation Method of Enhanced Oil Recovery Based on Statistical Analysis

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 795
Author(s):  
Zhengbo Wang ◽  
Qiang Wang ◽  
Desheng Ma ◽  
Wanchun Zhao ◽  
Xiaohan Feng ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Evaluation Method ◽  
Enhanced Recovery ◽  
Chemical Flooding ◽  
Recovery Method ◽  
Steam Flooding ◽  
Tertiary Oil Recovery ◽  
Similarity Ratio ◽  
Potential Evaluation ◽  
Target Block

Based on a large number of empirical statistics of tertiary oil recovery technology in China, including polymer flooding, chemical flooding, gas flooding, in situ combustion, steam flooding, ect., 22 key reservoir parameters were filterized. Five levels of quantitative screening criteria were developed for different tertiary oil recovery methods. The mean algorithm for the downward approximation and the grey correlation theory were used in this paper to quickly select the appropriate tertiary oil recovery method for the target blocks, which provides a preferred development method for subsequent potential evaluation. In the rapid analogy evaluation method of tertiary oil recovery potential, the total similarity ratio between the target block and the example block is determined. The target block is matched with the appropriate instance block according to the total similarity ratio value, using 80% as the boundary. The ratio of the geological reserves is used to predict the oil recovery interval, the actual annual injection data, and the economic profit, thus quickly predicting the economic potential of the tertiary oil recovery technology in the target block. Currently, our research team has integrated these two methods into the tertiary oil production potential evaluation software EORSYS3.0. The empirical analysis shows that this method is reasonable and the conclusion is reliable. In addition, the actual enhanced recovery value is within the effective range predicted by the method. The method and results of this paper will provide an important decision-making reference for the application and sustainable development of China Petroleum’s main tertiary oil recovery technology in the next 5–10 years.

Enhanced Recovery From Naturally Fractured Gas Reservoirs With Seismic Vibrations

2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Khadijeh Zare ◽  
Hojjat Mahiyar ◽  
Mojtaba Ghaedi
Keyword(s):  
Seismic Waves ◽  
Enhanced Recovery ◽  
Low Cost ◽  
Rock Properties ◽  
Recovery Method ◽  
Gas Recovery ◽  
Naturally Fractured ◽  
The Matrix ◽  
Seismic Vibrations ◽  
Trapped Gas

Abstract Water level rising in fracture networks of a naturally fractured gas reservoir is extremely challenging and can significantly decrease the ultimate recovery due to reservoir heterogeneity. Although capillary drainage and gravity force can enhance the displacement of gas recovery from matrix to fracture, these forces may not be so effective in mobilizing a large amount of trapped gas through the matrix. So called, the use of seismic wave can be suggested as a low cost and environmentally friendly enhanced method compared with the other conventional enhanced methods. This article is aimed to examine the ability of seismic vibration in generating an efficient driving force for moving the remaining gas into the fracture which, to the best of the author’s knowledge, has not been reported so far. To this end, an in-house numerical simulator has been developed to investigate this enhanced recovery method and also to evaluate the effect of wave characteristics as well as rock properties on the ultimate recovery. The governing equations are solved numerically using finite difference approach and the accuracy of these equations was compared with a commercial simulator for verification. The results are very encouraging and show substantial gas recovery enhancement by applying seismic waves. Our investigation also shows that this stimulation method is more efficient at lower frequencies and also in higher permeable matrix and fractures.

Condensate Recovery from Tight Gas-Condensate Reservoirs using a new Method Based on a Gas-Based Chemical

2021 ◽  
Author(s):  
Abdulelah Nasieef ◽  
Mahmoud Jamiolahmady ◽  
Hosein Doryanidaryuni ◽  
Alejandro Restrepo ◽  
Alonso Ocampo ◽  
...  
Keyword(s):  
Enhanced Recovery ◽  
Gas Condensate ◽  
Dew Point ◽  
New Method ◽  
Reservoir Rock ◽  
Production Data ◽  
Low Permeability ◽  
Recovery Method ◽  
Gas Condensate Reservoirs ◽  
Hydrocarbon Gas

Abstract Recovery from gas condensate reservoirs, when the pressure is below dew point pressure (Pdew), is adversely affected by the accumulation of condensate in the near wellbore region. The mitigation of the near-well bore condensate banking is the main purpose of any enhanced recovery method implemented in gas condensate reservoirs. In this work, a new method was tested to improve condensate recovery by using a chemical that was delivered using hydrocarbon gas as a carrier into a very low permeability and very low porosity reservoir rock. Chemicals are typically injected using liquid carrier solvents. The use of hydrocarbon gas as the carrier provides a remedy to mitigate condensate banking in very low permeability cores by minimizing complications associated with low injectivity and back flow clean-up process requirements of an injected liquid. The chemical potential was evaluated by recording production data from unsteady-state coreflood experiments. The injection of the chemical with equilibrated gas resulted in condensate saturation to decrease from 19.6% to 6.5%. This decrease was not instantaneous and took some time to occur indicating that the chemical needs time to interact with the resident fluid and rock. The benefit of the method, at the field scale, was also estimated by performing single-well numerical simulations that use relative permeability (kr) data which history matched the measured coreflood production data. The results of these preliminary simulations also showed improved recovery of gas and condensate compared to pure depletion, without chemical, by around 40% for the cases considered.

scholarly journals Integrated physical enhanced recovery method for high-viscosity oil reservoirs

2021 ◽  
Vol 244 ◽  
pp. 09012
Author(s):  
Aziz Khudaiberdiev ◽  
Petr Kosianov
Keyword(s):  
Electromagnetic Fields ◽  
Electric Fields ◽  
Oil Recovery ◽  
Enhanced Recovery ◽  
High Viscosity ◽  
Steam Treatment ◽  
Recovery Method ◽  
Mobility Of Molecules ◽  
High Viscosity Oil ◽  
The Impact

The physical methods of enhanced oil recovery using electromagnetic fields are studied in this paper. Purpose of the work is to study the dependence of the main quantities that determine the volume of filtered oil, including the viscosity of oil, on the parameters (temperature, intensity and frequency) of thermal and electromagnetic fields, and optimize these parameters for maximum oil recovery factor using electric fields and steam treatment of the formation.It is proposed to combine the most effective and environmentally friendly methods to increase oil production. In the developed technique, methods of converting steam energy are used to create a torque of the drilling device with simultaneous steam treatment of the bottomhole zone of the reservoir. As well as the impact of an alternating electromagnetic field on the reservoir matrix and interstratal liquid fluids to create currents, increase the mobility of molecules of liquid fluids, and, as a consequence, increase the temperature and lower the viscosity of oil, which will increase oil recovery. As a result of numerous experimental experiments carried out using the original setup in the laboratory of the branch of the Tyumen Industrial University in Nizhnevartovsk, it was shown that a decrease in viscosity is observed only when exposed to simultaneous thermal and electromagnetic fields.

scholarly journals P-P45 Prognostic Value of CRP in Post-PPPD and Whipple’s Re-Intervention

2021 ◽  
Vol 108 (Supplement_9) ◽  
Author(s):  
Ana Maria Saenz Macias ◽  
Adam Frampton
Keyword(s):  
Enhanced Recovery ◽  
Surgical Care ◽  
International Study ◽  
Optimal Level ◽  
Normal Serum ◽  
Amylase Level ◽  
Post Surgery ◽  
Whipple’S Procedure ◽  
Pancreatic Fistulas ◽  
Drain Amylase

Abstract Background Several studies have aimed to use different biochemical and haematological markers to predict relevant post-operatively pancreatic fistulas after hepatobiliary operations, however none has been defined as the gold-standard. This study aimed to evaluate the sensitivity and specificity of day 3 C-reactive protein (CRP) and drain amylase values in predicting re-intervention in patients who have undergone pancreatico-duodenectomy (PPPD) or Whipple’s procedure. Methods Retrospective collection of data from a prospective database of patients who underwent PPPD or Whipple’s procedure between January 2017 and February 2021. Serum CRP was collected from day one to day five post-operatively, and day three or the closest available result of post-surgery drain amylase values were considered. Cutoff values were determined as follows: day three CRP optimal level was determined by the median (175 mg/L), and drain amylase was determined by three times the upper limit of normal serum amylase level (330 U/L). Post-operative pancreatic fistulas (POPF) were classified as per the 2016 International Study Group for Pancreatic Surgery (ISGPS). Re-intervention was defined as any deviation from the normal post-surgical care – including interventional radiology procedures, embolisation, re-look laparotomies and re-admission to Intensive Care. Results A total of 217 patients were included in this study – 182 underwent pylorus preserving pancreaticoduodenectomy as opposed to those who had Whipple procedure. 55 (25%) patients required re-intervention post-operatively. A day three CRP above 175 showed a sensitivity of 78% and specificity of 66% in predicting re-intervention in these patients. The combination of this and elevated drain amylase proved to be more sensitive (85%) and specific (87%) than the CRP alone. Conclusions Day 3 CRP and drain amylase are accurate predictors of post-PPPD and Whipple’s re-interventions. We aim to include this as part of the local Enhanced Recovery Pathway to help identify patients that will potentially develop complications requiring further surgical management.

scholarly journals Postoperative day 3 drain amylase versus fistula risk score: predicting clinically relevant postoperative pancreatic fistula following pancreatico-duodenectomy

2019 ◽  
Vol 7 (1) ◽  
pp. 227
Author(s):  
Nagesh Nayakarahally Swamy Gowda ◽  
Sathish Obalanarasimhaiah ◽  
Balakrishna N. Setty ◽  
Jyotirmay Jena ◽  
Mannem Manoj Kumar
Keyword(s):  
Pancreatic Fistula ◽  
Risk Score ◽  
Enhanced Recovery ◽  
Area Under The Curve ◽  
Roc Curves ◽  
Postoperative Management ◽  
Postoperative Pancreatic Fistula ◽  
Perioperative Morbidity ◽  
Drain Amylase ◽  
Fistula Risk Score

Background: Clinically relevant postoperative pancreatic fistula (CR-POPF) remains the most common cause of perioperative morbidity following pancreatico-duodenectomy (PD). Early and accurate prediction of CR-POPF can be helpful in postoperative drain management as well as stratifying patients for enhanced recovery protocol after surgery. Both fistula risk score (FRS) and postoperative drain amylase levels have been analyzed in past. However, currently there is no clear consensus regarding the ideal predictor. Present study sought to assess the utility of postoperative day 3 drain amylase (POD-3DA) level as a predictor of CR-POPF in comparison with FRS.Methods: A retrospective analysis was done on 57 patients who underwent PD at our institute between 2014 to 2018. POPF was defined and graded in accordance with ISGPF definition. Receiver operating characteristic (ROC) analysis predicted a threshold of POD3DA >486 IU/l associated with CR-POPF. Sensitivity, specificity and odds ratios with 95%CI calculated and ROC curves were plotted for POD3DA of ≥500 IU/l and FRS (negligible/low vs. moderate/ high) as predictors of CR-POPF.Results: Incidence of POPF and CR-POPF was 63% and 32% respectively. Sensitivity and specificity of POD3DA ≥500 and moderate/high FRS for predicting CR-POPF were 83%, 79% & 78%, 51% respectively. Difference between ROC area under the curve (AUC) for POD3DA ≥500 IU/l (0.868) and FRS (0.692) was significant (p=0.028). Combining FRS and POD3DA ≥500 IU/l improved specificity (87%) at the cost of sensitivity (67%). The negative predictive value of POD3DA <500 IU/l and negligible/low FRS were 91.2% and 83.3% respectively.Conclusions: POD3DA level greater than 5 times of upper normal range is more precise at predicting CR-POPF, hence clinically more reliable for drain and postoperative management. 

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