Separate Layer Water Injection for Offshore Directional Wells

2016 ◽  
Author(s):  
Sun Fuchao ◽  
Jia Deli ◽  
Yu Jiaqing ◽  
Pei Xiaohan ◽  
Liu He ◽  
...  
Keyword(s):  
Water Injection ◽  
Separate Layer

Integrated Technologies of Testing and Controlling for High Efficiency Separate Layer Water Injection

2008 ◽  
Author(s):  
He Liu ◽  
Danfeng Xiao ◽  
Li Zhi Zhao ◽  
Fukun Zhang ◽  
Yumei Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Water Injection ◽  
Separate Layer

Identification-Free Adaptive Separate Layer Water Injection Control Based on Expert Amendment

2010 ◽  
Vol 44-47 ◽  
pp. 1470-1475
Author(s):  
Feng Shan Wang ◽  
De Li Jia ◽  
Shu Jin Zhang ◽  
Chong Jiang Liu ◽  
De Kui Xu
Keyword(s):  
Adaptive Control ◽  
Control Strategy ◽  
Water Injection ◽  
Strong Nonlinearity ◽  
Separate Layer ◽  
Injection Control ◽  
System Output ◽  
Adaptive Control Strategy ◽  
Injection Effect ◽  
Injection Technology

An identification-free adaptive control strategy based on expert amendment is proposed in this paper to solve the problem that it is difficult to establish mathematical model of water injection regulating process due to large time delay, strong nonlinearity and time variation in the flow control of separate layer water injection technology. In this control strategy, according to the past and current process information of water injection, the system output and trend can be estimated based on expert rules to amend the output of the identification-free adaptive control. The simulation result shows that this control strategy has perfect control performance and strong adaptability and it provides a feasible means for improving water injection effect.

Integrated Technologies of Testing and Controlling for High Efficiency Separate Layer Water Injection

2008 ◽  
Author(s):  
He Liu ◽  
Danfeng Xiao ◽  
Li Zhi Zhao ◽  
Fukun Zhang ◽  
Yumei Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Water Injection ◽  
Separate Layer

Integrated Technologies of Testing and Controlling for High Efficiency Separate Layer Water Injection

2008 ◽  
Author(s):  
L. He ◽  
X. Danfeng ◽  
Z. Lizhi ◽  
Z. Fukun ◽  
W. Yumei ◽  
...  
Keyword(s):  
High Efficiency ◽  
Water Injection ◽  
Separate Layer

Overview the 5 Years Experience of Intelligent Separate-Layer Injection Technology in B Offshore Oilfield

2021 ◽  
Author(s):  
Yigang Liu ◽  
Zheng Chen ◽  
Xianghai Meng ◽  
Zhixiong Zhang ◽  
Jian Zou ◽  
...  
Keyword(s):  
Short Circuit ◽  
Water Injection ◽  
Operation Time ◽  
Water Flooding ◽  
Internal Diameter ◽  
Injection Wells ◽  
Mode Water ◽  
Separate Layer ◽  
Injection Technology ◽  
Large Flow

Abstract Nowadays intelligent injection is considered as a new frontier for offshore oilfield. In order to improve the water injection indicators such as allocation frequency and qualification rate, intelligent separate-layer injection technology (ISIT) was researched, deployed and optimized in B offshore oilfield from 2015. In the course of 5 years’ project operation, some experience of success or failure was achieved. B offshore oilfield is the largest offshore oilfield in China with 33 water flooding oilfields and more than 800 water injection wells. With the continuous development, the problem of injection management mainly reflected in the contradiction between increasing demand of allocation and limited operation time and space was exposed. Two kinds of ISIT, cable implanted intelligent separate-layer injection technology(CISIT) and wireless intelligent separate-layer injection technology(WISIT), were deployed to solve the above problem. CISIT controlled the distributor downhole by electricity while WISIT controlled the distributor downhole by pressure pulse. By the use of ISIT, downhole nozzle's action, packer testing and downhole data monitoring could be remotely controlled on the ground. During the 5 years’ test, ISIT was optimized from the field breakdown including large flow range flowing test, cable protection project, efficient coding mode, water seepage resistance and so on. With the continuous optimization and quality control improvement, ISIT has overcome many problems, such as downhole short circuit and communication loss, and is becoming more stable and reliable. At present, ISIT can meet the needs of large flow injection(max 800m3/d per layer) and can adapt to the high frequency of acidizing and fracturing in offshore oilfield. The failure rate of ISIT has dropped to nearly 20% in 2020. As of December 2020, ISIT has formed series products for different internal diameter wells and applied in 156 water injection wells in B offshore oilfield. The average allocation frequency has increased from less than one time to 2 times per year. Through the application of ISIT, B offshore oilfield has accumulatively saved more than 2100 days of platform occupation and more than 73 million RMB yuan of allocation cost. The use of ISIT makes B offshore oilfield's injection become more efficient and intelligent. The 5 years’ experience of ISIT applicationin B offshore oilfield has a fairly referential significance for other offshore oilfields.

Applying Analytic Hierarchy Process to Determine Separate Layer Water Injection Rate of Single Well

2013 ◽  
Vol 734-737 ◽  
pp. 1354-1357
Author(s):  
Wu Yi Shan ◽  
Wei Lin Cui ◽  
Yong Sheng Li
Keyword(s):  
Analytic Hierarchy Process ◽  
Water Injection ◽  
Injection Rate ◽  
Oil Field ◽  
Analytic Hierarchy ◽  
Practical Applications ◽  
Separate Layer ◽  
Single Well ◽  
Water Cut ◽  
Hierarchy Process

The separate layer water injection rate determines the result of water injection. In the past, in order to inject a proper amount of water into different intervals, most of the time people would rely on their experiences. By employing this method, the amount of work was enormous and the result was not necessarily accurate. In this paper, five factors that would affect the water injection rate are taken into consideration, such as, thickness of the main well, the connected thickness, permeability, number of connected wells and oil saturation. A method of determining the proper water injection rate of single wells based on analytic hierarchy process is proposed. This method has been proven to be simple and accurate, the test result of a mathematical model also shows it fits the requirements of the oil field exploitation with current water cut and it is of great value to practical applications.

scholarly journals Application of wireline intelligent separate-layer water injection technology in Huabei Oilfield

2021 ◽  
Vol 1983 (1) ◽  
pp. 012043
Author(s):  
Xu Zhang ◽  
Ruibin Zhu ◽  
Gaofeng Li ◽  
Yan Jiang ◽  
Wei Xiong ◽  
...  
Keyword(s):  
Water Injection ◽  
Separate Layer ◽  
Injection Technology

Production optimization for alternated separate-layer water injection in complex fault reservoirs

2020 ◽  
Vol 193 ◽  
pp. 107409
Author(s):  
Liming Zhang ◽  
Chao Xu ◽  
Kai Zhang ◽  
Chuanjin Yao ◽  
Yongfei Yang ◽  
...  
Keyword(s):  
Water Injection ◽  
Production Optimization ◽  
Separate Layer ◽  
Complex Fault
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