scholarly journals Application of a wax deposition model in oil production pipelines

2015 ◽  
Vol 6 (1) ◽  
pp. 29-42
Author(s):  
Diego Fernando Bautista Parada ◽  
David Alfredo Fuentes Díaz ◽  
Paola Gauthier Maradei ◽  
Arlex Chaves Guerrero
Keyword(s):  
Oil Production ◽  
Wax Deposition ◽  
Deposition Model

Selection of effective wax (deposition) inhibitors to oil production and transportation at the Kondinskoye oil field

2020 ◽  
pp. 120-127
Author(s):  
E. N. Skvortsova ◽  
O. P. Deryugina
Keyword(s):  
Laboratory Tests ◽  
Initial Dosage ◽  
Oil Production ◽  
Oil Field ◽  
Transport Systems ◽  
Asphaltene Precipitation ◽  
Wax Deposition ◽  
Selection Of ◽  
Pilot Tests

The article discusses the results of a study on the selection of wax inhibitors that can be used at the Kondinskoye oil field during transportation and dehydration of the emulsion.Asphaltene precipitation is one of the most serious issues in oil production. The experiment was conducted in order to select the most effective wax inhibitors. We have carried out laboratory tests to choose the most effective wax inhibitor in the conditions of oil production, collection, preparation and external transport systems at the Kondinskoye oil field. Based on the data obtained, wax inhibitor-2, wax inhibitor-4, and wax inhibitor-6 have shown the best results in ensuring the efficiency of inhibition, which should be at least 70 %, and, therefore, they can be allowed to pilot tests. The recommended initial dosage of inhibitors according to the results obtained during pilot tests should be at least 500 g/t of oil.

THERMODYNAMIC-BASED, ONE-DIMENSIONAL PIPELINE WAX DEPOSITION MODEL

2021 ◽  
Author(s):  
Fabio Junior ◽  
Felipe Fleming ◽  
Luis Fernando Alzuguir Azevedo ◽  
ivan fernney ibanez aguilar ◽  
Angela Nieckele
Keyword(s):  
Wax Deposition ◽  
One Dimensional ◽  
Deposition Model

Assessment of the Impact of Wax Deposition in a Pre-Salt Project

2021 ◽  
Author(s):  
Nathalie Carvalho Pinheiro ◽  
Sergio Paulo Gomes Pinho
Keyword(s):  
Diffusion Coefficient ◽  
Wax Deposition ◽  
Full Field ◽  
Deposition Model ◽  
High Production ◽  
The One ◽  
Wax Deposits ◽  
Transient Models ◽  
The Impact ◽  
Production Losses

Abstract Despite pre-salt fields in Brazil usually having high production per well, one of the areas presents a reservoir with low permoporosity, which results in small flowrates with fluid temperatures during production below the one that is critical for wax deposition. The operations commonly used to remove the wax deposits are diesel soaking and pigging, which brings production losses and OPEX increase. Thus, the economic analysis should consider these events reducing the operational efficiency of production. To evaluate the production drop due to wax deposition, it was necessary to perform a loop test to determine the wax growth throughout time. With a multiphase simulator, it is possible to choose the deposition model and the diffusion coefficient that best fits the analyzed fluid. However, one of the limitations of this first analysis is the lack of data to determine the effect of the shear stripping, as the test is performed under a laminar flow. As this term plays an important role in wax growth, it was necessary to add to the simulation model the shear coefficient fitted from another pre-salt field. With this information, it will be possible to make a more reliable evaluation of the impact of wax deposition, increasing the confidence in the production curve, OPEX and NPV of the full field project. This paper shows the methodology that has been applied to evaluate the impact of wax deposition in pre-salt fields. It presents the deposition model, and its coefficients used to fit the multiphase transient models to a pre-salt field.

Identifying Optimal Pigging Frequency for Oil Pipelines Subject to Non-Uniform Wax Deposition Distribution

2014 ◽  
Author(s):  
Wenda Wang ◽  
Qiyu Huang ◽  
Si Li ◽  
Changhui Wang ◽  
Xi Wang
Keyword(s):  
Pressure Drop ◽  
Model Prediction ◽  
Extreme Case ◽  
Wax Deposition ◽  
Deposition Model ◽  
Oil Pipelines ◽  
Pump Stations ◽  
The Cost

Wax deposition in oil pipelines causes reduced throughput and other associated problems. Periodical pigging program can effectively minimize the cost of wax deposition. This paper shows a typical pigging case study for a field pipeline subject to non-uniform wax deposition distribution by using a developed wax deposition model. The model prediction results prove that the wax is distributed in a short, localized accumulation along the first half pipeline. The resultant pressure drop along the pipeline was examined to reveal the effects of non-uniform wax deposition distribution on the pipeline production. In extreme case, the pressure drop of severe localized section increases by 50%, while this value between pump stations is merely 3%. A maximum wax thickness of 2–4 mm is used as a criterion to determine an optimal pigging frequency. The case study pipeline is recommended to be pigged at a frequency of 10 to 15 days, using by-pass pigs.

A Reliable Model for Estimating the Wax Deposition Rate During Crude Oil Production and Processing

2014 ◽  
Vol 32 (23) ◽  
pp. 2837-2844 ◽  
Author(s):  
A. Kamari ◽  
A. H. Mohammadi ◽  
A. Bahadori ◽  
S. Zendehboudi
Keyword(s):  
Crude Oil ◽  
Deposition Rate ◽  
Oil Production ◽  
Wax Deposition ◽  
Reliable Model ◽  
Crude Oil Production

Estimation of wax deposition in the oil production units using RBF-ANN strategy

2017 ◽  
Vol 35 (17) ◽  
pp. 1737-1742 ◽  
Author(s):  
Reza Eghtedaei ◽  
Jafar Sasanipour ◽  
Houman Zarrabi ◽  
Masih Palizian ◽  
Alireza Baghban
Keyword(s):  
Oil Production ◽  
Wax Deposition

Study on the Pipeline Wax Deposition Mechanism and Influencing Factors

2012 ◽  
Vol 516-517 ◽  
pp. 1018-1021 ◽  
Author(s):  
Rong Ge Xiao ◽  
Bing Qian Wei ◽  
Pei Fen Yao ◽  
Dong Rui Yi
Keyword(s):  
Crude Oil ◽  
Influencing Factors ◽  
Petroleum Industry ◽  
Oil Production ◽  
Oil Exploration ◽  
Wax Deposition ◽  
Safe Operation ◽  
Deposition Mechanism ◽  
Crude Oil Production

The phenomenon of wax deposition is an extremely important issue in the petroleum industry. Researching it is of great help for the oil exploration, gathering, and transportation. This paper described the phenomenon of wax deposition, discussed the mechanism, analyzed the influencing factors and proposed the positive significance of the phenomenon of wax deposition on crude oil production and safe operation in oil gathering and transportation pipeline.

Developing a Common Model for Predicting the Wax Deposition in Crude Pipelines

2008 ◽  
Author(s):  
Qing Miao ◽  
Baoliang Jiang ◽  
Qiyu Huang ◽  
Zhengfeng Jiang ◽  
Sen Hu
Keyword(s):  
Mathematical Model ◽  
Test Data ◽  
Numerical Solutions ◽  
Crude Oils ◽  
Wax Deposition ◽  
Common Rule ◽  
New Model ◽  
Deposition Model ◽  
Long Time ◽  
Crude Sample

Wax Deposition commonly occurs in hot waxy crude oil pipelines. How to precisely predict the wax deposition is significant to the safe operation of pipelines. Presently the applied way to predict wax deposition in crude pipelines is mainly through numerical solutions by using the wax deposition mathematical model aimed at pipelined crude and relevant pipeline parameters, in which creating a precise wax deposition model plays an important role. Because wax deposition strongly depends on the composition of crude, most parameters in wax deposition model have to be determined through laboratory loop tests. Previous practices show that loop tests not only take a long time but also consume a large amount of crude sample. To obtain a precise model all the above had to be done in the past. Many wax deposition loop tests aimed at different crude oils have been carried out in our laboratory and, more importantly, a great deal of test data have been collected and analyzed. Now, based on our new research results on mechanism of wax deposition in crude pipelines and test data of up to 9 representative crudes, a common rule about wax deposition available to most crudes and their tests on loop has been excitedly discovered. It has resulted in the development of a new practical and more efficient mathematical model, which no longer needs long-time loop tests and large amount of crude sample and could be commonly or generally used on wax deposition prediction of most crude oils in pipelines. In this paper, how to discover the common rule about wax deposition of most crudes is introduced in detail. Also, a verification case for the application of the new model on a practical crude pipeline in China has been implemented by comparing the prediction results according to the new model with the operational data from the field during 7 pigging cycles. It is necessary to emphasize that the crude selected in this case for verifying is not among the 9 crudes used to establish the new model. The verification results show that the average error of prediction using the new model is only −4.215% and the maximal error is −20%, which are far better than ±30% by value in average prediction error tolerated on engineering application of wax deposition prediction around the world currently. So the results are very successful and encouraging and imply a prospective application.

scholarly journals Review of Solvents Based on Biomass for Mitigation of Wax Paraffin in Indonesian Oilfield

2019 ◽  
Vol 9 (24) ◽  
pp. 5499
Author(s):  
M. K. Afdhol ◽  
M. Abdurrahman ◽  
F. Hidayat ◽  
F. K. Chong ◽  
H. F. Mohd Zaid
Keyword(s):  
Crude Oil ◽  
Oil Production ◽  
Deposition Process ◽  
Wax Deposition ◽  
Chemical Additives ◽  
Pour Point Depressant ◽  
Wax Precipitation ◽  
Point Depressant ◽  
Crude Oil Production ◽  
Scale Down

This paper presents a review of the expectations and challenges of using biomass in the prevention and slowing of paraffin wax deposition that takes place during the crude oil production process. The inhibition of the deposition process involves the use of solvents from biomass that are generally available around the crude oil production field. The processes used to scale down the precipitation of wax include mixing crude oil with the manufacturer’s solvent composed of toluene and xylene. The goal is to assess solvents sourced from biomass that are capable to slow down the wax deposition process. Wax appearance temperature is an important characteristic to evaluate the possible wax precipitation of a given fluid. Wax precipitation can be reduced by using some chemical additives, often called the pour point depressant. This additive is expected to be produced from local biomass which can compete with solvents currently produced on the market.

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