Experimental Study on Wall Sticking Occurrence Temperatures of High Water Cut Crude Oil Gathered and Transported at Normal Temperatures

2018 ◽  
pp. 128-135
Author(s):  
Xiong-yi Hu ◽  
Xue-ling Zhao ◽  
Chun-Yan Ma ◽  
Zai-xing Wang ◽  
Yi-chi Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Crude Oil ◽  
High Water ◽  
High Water Cut ◽  
Water Cut

Blocking characteristics of high water-cut crude oil in low-temperature gathering and transportation pipeline

2021 ◽  
Author(s):  
Peiyang Xu ◽  
Limin He ◽  
Donghai Yang ◽  
Song Zhou ◽  
Jianwei Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Crude Oil ◽  
High Water ◽  
High Water Cut ◽  
Water Cut

Simultaneous Characterization of Water Content and Distribution in High-Water-Cut Crude Oil

2016 ◽  
Vol 30 (5) ◽  
pp. 3929-3933 ◽  
Author(s):  
Yan Song ◽  
Hong L. Zhan ◽  
Kun Zhao ◽  
Xin Y. Miao ◽  
Zhi Q. Lu ◽  
...  
Keyword(s):  
Crude Oil ◽  
Water Content ◽  
High Water ◽  
High Water Cut ◽  
Water Cut

Water Displacement Rule at Extra-High Water Cut Stage

2014 ◽  
Vol 1073-1076 ◽  
pp. 2239-2243
Author(s):  
Wen Sheng Zhou ◽  
Xiao Ru He ◽  
Zhan Li Geng ◽  
Ji Cheng Zhang
Keyword(s):  
Crude Oil ◽  
Physical Property ◽  
High Water ◽  
Water Displacement ◽  
Development Area ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut ◽  
Technical Measures

During the development of the oilfield, the water cut of the water controlled field is an aggregative indicator which is affected by various factors. It can reflect the restriction of liquid flowing rules from the oil layer and crude oil physical property, and the effect of serious technical measures during the exploitation. Water cut increasing rate is closely related with water cut. The level of water-cut increasing rate of various well network was evaluated during oil producing with extra-high water cut in Xingnan development area, compared the differences among various well networks, and analyzed the geology causes and development causes.

Wall sticking of high water-cut crude oil transported at temperatures below the gel point

2015 ◽  
Vol 12 (6) ◽  
pp. 1008-1014 ◽  
Author(s):  
Haimin Zheng ◽  
Qiyu Huang ◽  
Changhui Wang
Keyword(s):  
Crude Oil ◽  
High Water ◽  
Gel Point ◽  
High Water Cut ◽  
Water Cut

Reliable Detection of Water Cut in Inlet Piping Under Stratified Flow Conditions for Mature Fields and WIO and OIW Emulsion Layers in Crude Oil Settling Tanks with Novel Sensor Technology

2021 ◽  
Author(s):  
Pasi Laakkonen ◽  
Antti Nissinen ◽  
Ossi Lehtikangas ◽  
Jouni Hartikainen ◽  
Pekka Kaunisto ◽  
...  
Keyword(s):  
Crude Oil ◽  
Settling Tank ◽  
High Water ◽  
Sensor Technology ◽  
Electrical Tomography ◽  
Operational Conditions ◽  
Oil Tank ◽  
High Water Cut ◽  
Water Cut ◽  
Probe Sensor

Abstract Objectives/Scope Mature fields operations, which are almost 70% of today's production have a high water cut content. For each barrel of oil produced there can be 3 or more barrels of water. This means that operational conditions are challenging and might not be ideal for the facilities. In crude oil tanks, one of the most crucial operation parameter is the settling time of oil and water. Especially with heavy oils and high water cut, the operational conditions can be challenging with the existence of emulsion/rag layers in the tank. Most common level detection instrumentation struggle with detecting the proper interface levels leading to faulty control that can cause costly remediation and loss of revenue. This paper presents a novel solution by applying electric tomography pipe and probe sensors. Methods, Procedures, Process In electrical tomography, multiple electrodes are attached on the surface of the sensor and excitations are applied to some electrodes and responses are measured from other electrodes. Assuming a fast separation in the following crude oil tank, the operator expects the flow being stratified already in incoming trunk line. In real life this is not often the case: The incoming flow is turbulent meaning that there is no clear water/oil interface. To overcome this a pipe sensor is needed to monitor the flow regime and hence there is a possibility to control the a) chemical feed and b) flow speed to get the flow stratified. As soon as the flow is stratified in a trunk line it will be guided to a crude oil settling tank for an additional separation. In this tank there is a possibility to apply a probe sensor to monitor reliably the emulsion layer between water and oil. This allows settling time, process parameters and chemicals to be optimized to get a clear separation and hence improving the oil and water quality for a further processing. Results, Observations, Conclusions Results from pipe sensor operation in crude oil pipelines will be shared. The results will show an accurate water cut profile across the pipe cross section even under stratified flow conditions. Additionally, probe sensor results in a crude oil tank operation will be shared and hence confirming the reliability and robustness of the probe sensor operation in tanks. One of the key features of the pipe and probe sensors is the full functionality even under severe contamination with deposits on the sensor surfaces. The operational principle of this method will be shared and verified by experimental results. Novel/Additive Information The sensor technology for the tank inspection and piping uses novel electrical tomography with compact electronic and fast-acting computation with high resolution. This type of technology for settling tank application is new.

The Research of Hydraulic Characteristics of High Water Cut Crude Oil Pipeline in Sabei Oilfield

2014 ◽  
Vol 852 ◽  
pp. 506-510
Author(s):  
Xiao Qian Guo ◽  
Xiao Ran Zhang ◽  
Jian Zhao ◽  
Chao Sun
Keyword(s):  
Friction Coefficient ◽  
Crude Oil ◽  
High Water ◽  
Hydraulic Characteristics ◽  
Correction Model ◽  
Oil Pipeline ◽  
Hydraulic Friction ◽  
High Water Cut ◽  
Water Cut ◽  
Flow States

Based on a large number of actual production data, the paper researches the hydraulic characteristics of high water cut crude oil pipeline in Sabei Oilfield and summarizes change rules of Hydraulic friction coefficient and Reynolds number of high water cut crude oil pipeline under different flow states. After making correction model of Hydraulic friction coefficient at different flow states and using the optimization technique to determine the coefficient in the model, based on C++ builder programming platform developed the software of pipeline hydraulic friction coefficient of correction. The results calculated from the software show that the correction model can significantly reduce the pipeline hydraulic calculation errors which are declined from more than 20% to less than 5%.

The Study on Non-Heating Transportation of Carbon Dioxide Flooding Pipeline

2020 ◽  
Author(s):  
Xianwen Cheng ◽  
Qiyu Huang ◽  
Yao Li ◽  
Yaping Li ◽  
Xin Liu
Keyword(s):  
Carbon Dioxide ◽  
Crude Oil ◽  
Pipe Wall ◽  
Flow Characteristics ◽  
High Water ◽  
Gel Point ◽  
Before And After ◽  
High Water Cut ◽  
Water Cut ◽  
Carbon Dioxide Flooding

Abstract For most high water-cut pipelines, even if the transportation temperature drops below the gel point of crude oil, the pipeline can still operate safely. Especially when the crude oil has dissolved a certain amount of gas, its flow characteristics are significantly improved, and which can achieve non-heating transportation easily. However, the oil particles will adhere to the pipe wall (which called wall sticking), and become difficult to be swept down with the drop of temperature, which undoubtedly increases the risk of pipe blockage. In order to prevent the occurrence of pipe blockage, it is necessary to find the minimum temperature that allows non-heating transportation. In the study of non-heating transportation, minimum transportation temperature (MTT) and wall sticking congealed oil amount (WSOA) are the most important research objectives. When the temperature is between the gel point of crude oil and MTT, the crude oil gel only forms a thin oil layer on the pipe wall, which does not affect the safe operation of the pipeline. Once the temperature drops below MTT, a large amount of congealed oil will stick to the pipe wall, reducing the inner diameter of the pipe and increasing the risk of plugging. This paper has studied the effect of carbon dioxide on non-heating transportation and found that the presence of carbon dioxide can make WSOA significantly reduced and the congealed oil becomes softer, but MTT does not change. According to the measurement of the rheological characteristics of crude oil before and after dissolving carbon dioxide, it is believed that the above experimental results may be due to the decrease in viscosity and wax appearance temperature of crude oil after dissolving gas, which hinders the precipitation and aggregation of wax crystals and inhibits the formation of crude oil gel. In addition, it is speculated that the surface of the dissolved gas crude oil is covered with a large number of bubbles. These bubbles will reduce the contact area of the crude oil and the wall surface, resulting in a decrease of WSOA. In a word, the research methods mentioned in this paper are suitable for the study of non-heating transportation of carbon dioxide flooding pipeline.

Sign in / Sign up

Export Citation Format

Share Document