Comparison of Models Correlating Cumulative Oil Production and Water Cut

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Changhui Cheng ◽  
Kewen Li
Keyword(s):  
Oil Production ◽  
Core Sample ◽  
Production Performance ◽  
The Other ◽  
Production Data ◽  
Water Cut ◽  
Single Figure ◽  
Low Permeability Reservoirs ◽  
The Relationship ◽  
Better Than

There have been many models to estimate reserves and predict oil production performance using the relationship between water cut, fw, (or water-oil ratio, WOR) and cumulative oil production (Np) in the literature. However, it is difficult to choose the suitable models for specific reservoirs. On the other hand, consistency and accuracy are yet to be improved. In this study, several frequently used models for predicting cumulative oil production using water cut have been compared using production data from low permeability reservoirs. These models include the conventional model, the Ershaghi–Omoregie model, the Purvis model, the Arps model, the Bondar–Blasingame model, and the Warren model. All of the models were applied to production data, respectively, and then compared in one single figure, that is, fw versus Np, for one set of production data from both reservoirs and the core sample. To do so, it facilitated the comparison of different models. Otherwise, it may be difficult to make the comparison for all of the models because the models have different dependent variables. The analysis and discussion to the results have been conducted. The results have demonstrated that no model could fit all of the cases studied. Each model has the advantages and limitations. However, the Warren model is better than the other five models statistically. It fits most of the cases studied satisfactorily.

scholarly journals A New Growth Curve for Predicting Production Performance of Water-Flooding Oilfields

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Feng Liu ◽  
Yancheng Liu ◽  
Xiao Guo ◽  
Fei Yang ◽  
Ahuan Zhou ◽  
...  
Keyword(s):  
Growth Curve ◽  
Growth Curves ◽  
Oil Production ◽  
Production Performance ◽  
Water Flooding ◽  
Production Data ◽  
New Model ◽  
Well Production ◽  
Curve Method ◽  
Water Cut

Oil production and water cut prediction is one of the most important research contents of reservoir production performance analysis. The growth curve method has the advantages of the general water drive curve method and the combined solution model method with fewer parameters and simple and fast calculation process and so it has been widely used in well production prediction. Based on the analysis of 4W and 4Y4 model growth curves, a new generalized growth curve of the well production performance is proposed. The new model can forecast cumulative oil production, annual oil production, and water cut at different oilfield development periods. A MATLAB program was developed to derive the parameters in the new model. The built model was applied to the production data of the Samattalol oilfield and Daqing oilfield. The predicted cumulative oil production, annual oil production, and water cut are all close to the actual production data, and satisfactory results are obtained, which demonstrates the practicability and reliability of the new model.

scholarly journals A Markov-switching dynamic regression analysis of the asymmetries related to the determinants of US crude oil production between 1982 and 2019

2021 ◽  
Author(s):  
Serge Djoudji Temkeng ◽  
Achille Dargaud Fofack
Keyword(s):  
Crude Oil ◽  
Markov Switching ◽  
Oil Production ◽  
The Other ◽  
Shale Oil ◽  
Relative Importance ◽  
Crude Oil Production ◽  
The Usa ◽  
Switching Dynamic ◽  
The Relationship

AbstractThe structural changes brought about by shale oil revolution have inspired this paper of which the aim is to analyze the potential asymmetries related to the determinants of crude oil production in the USA. Thus, using a Markov-switching dynamic regression model in which parameters change when oil production moves from one regime to the other, it is found that for both oil production and oil relative importance, the regime that was dominant during the 1980s and the early 1990s when oil production in the USA was substantially high is the same regime that has once again become dominant in the decade corresponding to the shale oil revolution. Furthermore, the study reveals the existence of asymmetries in the relationship between US crude oil production and both manufacturing production and the consumer price index. Asymmetries are also found in the relationship between the relative importance US crude oil and manufacturing production. Finally, it is found that the intercept and the variance parameter also vary from one regime to the other, thus justifying the use of regime-dependent models.

scholarly journals Reflexivity and transnational habitus

AILA Review ◽  
2016 ◽  
Vol 29 ◽  
pp. 173-198 ◽  
Author(s):  
Peter I. De Costa ◽  
Magda Tigchelaar ◽  
Yaqiong Cui
Keyword(s):  
High School ◽  
Social Networks ◽  
International Students ◽  
International Student ◽  
Chinese Students ◽  
The Other ◽  
Grand Narrative ◽  
Chinese International Student ◽  
The Relationship ◽  
Better Than

Following Sayer’s (2010) examination of reflexivity and habitus, we focus on thetransnational habitus(Darvin & Norton 2015) of Aaron, a Chinese international student at a U.S. university. Specifically, we examine how he wrestled with being identified as an ESL learner despite having attended a U.S. high school. Also exploring the relationship between reflexivity and emotions (Flam 2010), we draw on his written work, interviews, and his WeChat conversations. Our findings revealed that as a result of positioning himself as being better than the other Chinese students on campus (because of his English proficiency) and distancing himself from domestic U.S. students, Aaron did not capitalize on his Chinese-English bilingualism to extend his local social networks, which exacerbated his growing isolation at his home university. In tracing his emotional trajectory and strategies to cope with his predicament, we problematize the grand narrative of theglobal elite(Vandrick 2011) that overlooks the challenges encountered by affluent international students.

scholarly journals Functional glyco-metagenomics elucidates the role of glycan-related genes in environments

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Hayato Takihara ◽  
Nobuaki Miura ◽  
Kiyoko F. Aoki-Kinoshita ◽  
Shujiro Okuda
Keyword(s):  
Sequence Alignment ◽  
The Other ◽  
Glycoside Hydrolases ◽  
Optimal Parameters ◽  
Complete Genomes ◽  
Enzyme Families ◽  
The Relationship ◽  
Alignment Length ◽  
Better Than

Abstract Background Glycan-related genes play a fundamental role in various processes for energy acquisition and homeostasis maintenance while adapting to the environment in which the organism exists; however, their role in the microbiome in the environment is unclear. Methods Sequence alignment was performed between known glycan-related genes and complete genomes of microorganisms, and optimal parameters for identifying glycan-related genes were determined based on the alignments. Using the constructed scheme (> 90% of identity and > 25 aa of alignment length), glycan-related genes in various environments were identified from 198 different metagenome data. Results As a result, we identified 86.73 million glycan-related genes from the metagenome data. Among the 12 environments classified in this study, the percentage of glycan-related genes was high in the human-associated environment, suggesting that these environments utilize glycan metabolism better than other environments. On the other hand, the relative abundances of both glycoside hydrolases and glycosyltransferases surprisingly had a coverage of over 80% in all the environments. These glycoside hydrolases and glycosyltransferases were classified into two groups of (1) general enzyme families identified in various environments and (2) specific enzymes found only in certain environments. The general enzyme families were mostly from genes involved in monosaccharide metabolism, and most of the specific enzymes were polysaccharide degrading enzymes. Conclusion These findings suggest that environmental microorganisms could change the composition of their glycan-related genes to adapt the processes involved in acquiring energy from glycans in their environments. Our functional glyco-metagenomics approach has made it possible to clarify the relationship between the environment and genes from the perspective of carbohydrates, and the existence of glycan-related genes that exist specifically in the environment.

scholarly journals Naked-neck and frizzled feather fowls are high performance laying local chicken in Nigeria

2020 ◽  
Vol 44 (5) ◽  
pp. 9-13
Author(s):  
R. J. Nosike ◽  
J. C. Ezike ◽  
C. N. Odukwe ◽  
O. F. Nwakpu ◽  
C. N. Okocha ◽  
...  
Keyword(s):  
High Performance ◽  
Egg Production ◽  
The Other ◽  
Production Data ◽  
Naked Neck ◽  
Mean Values ◽  
Laying Performance ◽  
Egg Number ◽  
Local Chicken ◽  
Better Than

The study was conducted to investigate the effect of genotype on the laying performance of Nigerian local chicken. The experiment was carried out using 99 local chicken of the three genotypes, comprising of 90 hens and 9 cocks (33 frizzle feather, 33 naked-neck feather and 33 normal feathered). Eggs were collected from the different genotypes for 8 weeks. The laying performance traits were egg number, hen-housed (%) and hen-day (%) egg production. Data collected were subjected to ANOVA in a completely randomised design. The hen-day egg production showed significant differences (P<0.05) in all the weeks. Naked-neck genotype performed better in terms of hen-day egg production than the other two genotypes and had highest values in week 1 (27.14±0.01), week 5 (27.60±0.09), week 7 (34.53±1.13) andweek 8 (16.30±0.03). Therewere significant differences (P<0.05) in all the weeks for hen-housed egg production and naked-neck also performed better than the frizzled and normal feather apart from week 2, 3 and 6. The naked-neck genotype had highest mean values in week 1, 4, 5, 7 and 8 with 27.18±0.06, 25.70±0.02, 19.33±0.67, 24.08±0.22 and 11.39±0.03 respectively for hen-housed egg production. The naked-neck had significantly (P<0.05) higher values for egg number when compared with frizzle and normal feathered genotypes. The values ranged between 5.67±0.67 to 2.00±0.10 (naked-neck), 6.33±0.33 to 2.67±0.67 (frizzle) and 3.33±0.33 to 1.33±0.33 (normal). It is therefore, reasonable to incorporate the naked-neck and frizzled feather genotypes of local chicken in producing locally-adapted commercial eggs

scholarly journals Perspective on Crude Palm Oil Production: The Effect of Raw Palm Oil and Biofuel Prices

2021 ◽  
pp. 15-25
Author(s):  
Afriany ◽  
Rubianto Pitoyo
Keyword(s):  
Production Process ◽  
Palm Oil ◽  
Time Series Data ◽  
Oil Production ◽  
Series Data ◽  
Production Data ◽  
Crude Palm Oil ◽  
Specialized Production ◽  
Production Factors ◽  
The Relationship

Efficiency is the important things in production process. Some production factors as labor, materials, and machinery must be calculate accurately. The purpose of this research is for analyzing the influence of raw palm oil and Biofuel prices against crude palm oil production. Sample in this research is time series data that specialized production data, The technique analysis is using analysis of multiple linier regression. The results from analysis show correlation between raw palm oil and biofuel prices with crude palm oil production is 57.1 %, The relationship between raw palm oil against crude palm oil production have significant effect and biofuel prices against crude palm oil production have no significant effect. Based on the results of F test there are the significant influence between raw palm oil and biofues prices against crude palm oil production. finding in this research is PT. Wilmar using 3 type of fuel for production process, petroleum, biofuel and waste of raw palm oil production which makes biofuel prices have no effect on crude palm oil production

A Method to Determine the Optimal Water Injection Intensity Based on Oil Production Rate and Water Cut

2012 ◽  
Vol 594-597 ◽  
pp. 2442-2445 ◽  
Author(s):  
Ji Cheng Zhang ◽  
Ying Jia ◽  
Xiao Na Cui
Keyword(s):  
Production Rate ◽  
Water Injection ◽  
Oil Production ◽  
Water Flooding ◽  
Water Intensity ◽  
Water Cut ◽  
Relationship Of ◽  
The Relationship ◽  
Oilfield Development ◽  
Zone Water

Water injection is one of the important ways to maintain reservoir pressure and improving the oilfield development effect. And separate zone water injection is the main technology in water flooding oilfield. The optimal water intensity which has been allocated plays an important role in all kinds of reservoir. This paper proposed a method to optimize the water injection intensity based on oil production rate and water cut. Conceptual model was constructed on the basis of real reservoir. By numerical simulation, a chart board was derived which describes the relationship of water injection intensity versus oil production rate and water cut. Using this chart, we can determine the optimal water injection intensity on different oil production rate and water cut.

Effect of various husbandry conditions on the production parameters of swine herds in Poland

2013 ◽  
Vol 16 (4) ◽  
pp. 707-713 ◽  
Author(s):  
A. Dors ◽  
E. Czyżewska ◽  
M. Pomorska-Mól ◽  
R. Kołacz ◽  
Z. Pejsak
Keyword(s):  
Production Performance ◽  
Basic Knowledge ◽  
Farm Size ◽  
Production Data ◽  
Swine Production ◽  
Swine Farms ◽  
Production Parameters ◽  
Questionnaire Surveys ◽  
Swine Herds ◽  
Better Than

Abstract The aim of this study was to collect production data of Polish swine herds, with special emphasis on the production parameters in farrow to finish pig herds. Another goal was to determine differences in the production performance of swine herds with different sizes, various status with regard to biosecurity, and with different veterinary expenditure. For this purpose, questionnaire surveys were carried out in 96 polish farrow to finish pig herds. The data concerning production parameters (e.g. the number of pigs born per sow per year, litters per sow per year, pre- and post-weaning mortality), farm size (small, medium, large), management (all in-all out by room or building), veterinary expenditure (including medication) and the percentage of pigs under medical treatment, were collected. The data obtained in the present study indicate that in general, the efficiency of swine production in evaluated farms was relatively low. It was also found that in large swine farms the efficiency was better than that in small ones and that the proper biosecurity positively influenced the performance of the swine farms. However, only in 10.4% facilities, the biosecurity rules and methods, including the principle “all-in all-out”, were implemented and kept. It seems that inefficient swine production on the majority of Polish farms results from poor basic knowledge on pig production and understanding of fundamental economic rules of swine breeding.

Pilot Project: Application of Multi-Component Thermal Fluid Stimulation on Shallow Heavy Oil Reservoir in Kazakhstan

2021 ◽  
Author(s):  
Leihao Yi ◽  
Xin Hua ◽  
Wenlong Guan ◽  
Shiguo Xu ◽  
Ziyi Zhang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Late Stage ◽  
Free Water ◽  
Oil Production ◽  
Economic Benefits ◽  
Production Performance ◽  
Combustion Mechanism ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir ◽  
Water Cut

Abstract Cyclic steam simulation (CSS) was widely used to recover heavy oil in shallow reservoirs in Kazakhstan. In the late stage of CSS in M oilfield, the performance of this CSS project was poor with high water cut and low oil steam ratio (OSR), indicating low economic benefit. The multi-component thermal fluid (MTF) stimulation trial has been conducted there since March 2018 to evaluate the feasibility of this technology. This paper introduces the field experience and the production performance of MTF stimulation. Results are from 32 cycles of MTF stimulations in 23 wells, most of which had completed their 4 cycles of CSS before. MTF technology is based on a high-pressure jet combustion mechanism, generating a mixture of nitrogen, carbon dioxide and vapor (MTF) under a sealed combustion condition. The mixture fluid provides a significant enhancement through a synergistic effect in the reservoir. The soaking and recovery process are the same as the conventional steam stimulation, meanwhile the requirements for completion and wellbore structure are the same as well. By the time of statistic, average cyclic OSR reaches 2.19 from 0.49 of last CSS cycle. Average water cut declines from 90% to 40% and daily oil production rises from 22 bbls to 33 bbls. Free water is almost invisible in the produced fluid, instead, a stable quasi-monophasic flow has been presented even at low temperatures. This effectively increases the fluidity and dilatancy of crude oil, and greatly replenishes the elastic energy of the formation. Meanwhile, with all components injected into the formation, MTF stimulation achieves significant reduction in carbon emissions. Although this is a pilot test, considerable economic benefits have been achieved with the increase of oil production efficiency. MTF stimulation brings an additional profit of USD 4.4 million for the first year under conditions of local material's cost. This successful pilot demonstrates that MTF stimulation may play an important role at late stage of CSS, even it has its own prospect in an initial heavy oil reservoir development. In the meantime, this pilot experience can be used as a reference for other similar reservoirs’ development.

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