Experimental Study on the Corrosion Behavior of Produced Fluid on J55 Steel during CO2 Flooding

2018 ◽  
Vol 773 ◽  
pp. 179-183
Author(s):  
Jin Sheng Zhao ◽  
Ying Jun Ju ◽  
Mei Rong Tang ◽  
Rong Huan Chen
Keyword(s):  
Partial Pressure ◽  
Corrosion Behavior ◽  
Simulation Experiment ◽  
Film Surface ◽  
Oil Field ◽  
Oil Well ◽  
Field Development ◽  
Oil Field Development ◽  
Product Film ◽  
Corrosion Simulation

CO2 flooding has been widely used in oil field development, but the produced fluid is easy to cause corrosion of tubing and casing. In order to determine the corrosion behavior of produced fluid on J55 steel during CO2 flooding, we use the simulated oil well produced fluid as corrosive medium and conduct the corrosion simulation experiment at high temperature and high pressure. The experimental results showed that the crystalline grain size of corrosion film surface is different for the different CO2 partial pressure. When CO2 partial pressure is greater than the critical pressure, the crystalline grain is not oblique six-party crystal structure, and the grains become small and compact, so the corrosion product film should have a good corrosion inhibition. Both static and dynamic corrosion of samples are serious. The research has a theoretical guiding significance on corrosion protection during CO2 flooding.

The Multilevel Programming and Solutions of Production Constitution in Oil-Field Development during Mid and Late Part

2011 ◽  
Vol 181-182 ◽  
pp. 1044-1049
Author(s):  
Shi Bao Yuan ◽  
Hai Yan Jiang
Keyword(s):  
Objective Function ◽  
Programming Model ◽  
Work Load ◽  
Oil Field ◽  
Oil Well ◽  
Stochastic Algorithm ◽  
Multilevel Programming ◽  
Field Development ◽  
Oil Field Development ◽  
Programming Process

During mid and late period in Oil-field development, there is a restriction between the production and the constitution programming of measure type. The Bi-level programming model is built about field production constitution to reflect the hierarchical and relation of the programming process. In the model, the max number of entire oilfield's gross revenue is marked as the objective function of upper formation programming, and measure production from programming is marked as the objective function of lower level programming, and the new oil well quantity,the measure work load and the measure cost are took as constraints. So the solution algorithm that combined with stochastic algorithm and genetic algorithm is designed, and it is verified that the model and algorithm is effective with examples. Now, the problem that is restrictive between oilfield production and the most superior assignment of work load and cost is solved successfully.

Downhole CO2 partial pressure calculation and tubing material selection – a case study of an offshore oil field in the South China Sea

2016 ◽  
Vol 63 (5) ◽  
pp. 414-420 ◽  
Author(s):  
Wei Yan ◽  
Yong Xiang ◽  
Wenliang Li ◽  
Jingen Deng
Keyword(s):  
Partial Pressure ◽  
Pressure Profile ◽  
Field Application ◽  
Separation Process ◽  
Oil Field ◽  
Oil Well ◽  
Content Type ◽  
Calculating Method ◽  
Oil Gas

Purpose This paper aims to establish the downhole CO2 partial pressure profile calculating method and then to make an economical oil country tubular goods (OCTG) anti-corrosion design. CO2 partial pressure is the most important parameter to the oil and gas corrosion research for these wells which contain sweet gas of CO2. However, till now, there has not been a recognized method for calculating this important value. Especially in oil well, CO2 partial pressure calculation seems more complicated. Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. A case study was presented according to the new method, and two kinds of corrosion environment were determined. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. Based on the test results, 3Cr-L80 was recommended for downhole tubing. Combined with the field application practice, 3Cr-L80 was proved as a safety and economy anti-corrosion tubing material in this oil field. A proper corrosion parameter (mainly refers to CO2 partial pressure and temperature) can ensure a safety and economy downhole tubing anti-corrosion design. Design/methodology/approach Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. A field application practice was used. Findings It is necessary to calculate the CO2 partial pressure properly to ensure a safety and economy downhole tubing (or casing) anti-corrosion design. Originality/value The gas and oil separation theory and corrosion theory are combined together to give a useful method in downhole tubing anti-corrosion design method.

Diagnostic Plots for Production Decline During the Transition of Oil Field Development From Depletion to Water Injection

2021 ◽  
Author(s):  
Vil Syrtlanov ◽  
Yury Golovatskiy ◽  
Ivan Ishimov
Keyword(s):  
Water Injection ◽  
Simulation Models ◽  
Oil Field ◽  
Production Data ◽  
Oil Reservoir ◽  
Field Development ◽  
Well Production ◽  
Diagnostic Plots ◽  
Oil Field Development ◽  
Analytical Approaches

Abstract In this paper the simplified way is proposed for predicting the dynamics of liquid production and estimating the parameters of the oil reservoir using diagnostic curves, which are a generalization of analytical approaches, partially compared with the results of calculations on 3D simulation models and with actual well production data.

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