Suggestion on Model Selection of Sewage Flow Meter in Shengtuo Oilfield

Abstract: Shengtuo Oilfield sewage flow meter selection advice information is provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. Abstract: The sewage from Shengli Oil Production Plant’s first oil mining mine exists in the sewage management of Shengli Oil Production Plant with its individuality. In addition to the commonality of sewage, it is also difficult to accumulate sewage due to the influence of polymers in tertiary oil production and thermal recovery sewage. processing has a huge impact. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The sewage from Shengli Oil Extraction Plant's first oil mining mine has its own personality in the sewage management of Shengli Oil Extraction Plant. In addition to the commonality of sewage, it is also difficult to handle due to the influence of polymers in tertiary oil extraction and thermal extraction sewage. It greatly affects the quality of sewage, resulting in the existence of problems such as inaccuracy and easy damage of sewage flowmeters during operation. In response to this problem, the main factors affecting the accuracy of the flowmeter were found out through the analysis of sewage flow, water quality analysis, and the general situation of the flowmeter used, and the type of flowmeter selected for this block was proposed. 1 Usage of existing sewage flowmeters 1.1 Current flowmeter situation Shengli Oil Production Plant has installed 618 flowmeters since 2005. There are three main types of sewage flowmeters currently in use: magnetoelectric flowmeter, turbine flowmeter and dry water meter . Water meter manufacturers mainly include: Hebei Maanshan, Zhejiang Essence, Zhejiang Tianxin, Shanghai Yinuo, Dongying Wantai, Zhejiang Aoxin, Shengli Instrument, Ruian Xinxin and other 8 manufacturers. 1.2 Scrap situation of flow meter 1.2.1 High-pressure water meter Due to the different water quality of each mine, most of the sewage contains factors such as oil and organic impurities. High-pressure water meters are not suitable. In 2010, 51 pieces of dry water meters were sent for inspection and 21 pieces were scrapped, with a scrapping rate of 41.2%. 1.2.2 From 2010 till now, 216 pieces of flowmeters have been checked and 30 pieces have been scrapped, and the scrapping rate is 13.9%. 1.3 Comprehensive evaluation of flowmeters after use 1.3.1 Quality evaluation of flowmeters Yinuo and Zhejiang Aoxin are of good quality. Zhejiang Tianxin has a short usage time and no quality problems have been found so far. Another manufacturer in Zhejiang has used products for one year and found that there are individual tables with large errors that cannot be adjusted. 1.3.2 After-sales service of flowmeter From the perspective of manufacturers' after-sales service, Hebei Ma'anshan, Zhejiang Tianxin and Dongying Wantai have better services, while a Shanghai manufacturer's service lags behind. 2 Influence of sewage water quality on flow meter Shengtuo Oilfield sewage treatment is difficult. The main reason is that the sewage in the plant is mainly composed of three parts: sewage in the injection area, sewage in the thermal mining area and sewage in the normal block. Among them, the sewage in the polymer injection area contains polymers, which are generally condensed and frozen. The polymers are mixed with the oil in the sewage, and are blocked on the probe of the core of the flowmeter, resulting in a large flowmeter error: while the sewage in the thermal recovery area It contains a lot of corrosive substances, which also affects the accuracy of the flowmeter to a certain extent. In order to solve the problem of sewage water quality, the oil production plant has carried out various transformations on the process and equipment in the station. At the same time, many advanced instruments and equipment have been introduced, such as the introduction of air flotation devices in Ninghai Station and the introduction of OPM devices in Tuoyi Station. However, in actual operation, various new problems are always encountered, resulting in intermittent operation, and the quality of sewage is always difficult to achieve an ideal state. 2.1 Status of sewage water quality From October to October, Ninghai Sewage Station treated a total of 1.87 million m2 of sewage, with an average daily average of 6200 m2. In October, the accumulative compliance rate of oil content in exported sewage was 100%, and the accumulative compliance rate of external suspended solids was 69.7% (see Table 1). In February 2011, the average oil content of incoming water at Tuoyi Station was 183.1mg/L, the average oil content of export was 16mg/L, the average suspended solids were 8.3mg/L, the average corrosion rate was 0.017m1m/a, and the average SRB bacteria was 6/mL. Only the suspended solid content exceeds the standard. From Table 1 and Table 2, it can be seen that the compliance rate of the suspended solids in the sewage export is extremely low, which leads to a layer of sludge on the surface of the water meter core probe during the sewage reinjection process, which affects the accuracy of the meter. In July 2010, the 1137 water distribution of the oil production team 18 and the part of the flow meter in the No. 3 water distribution room of the oil production team 10 were the stolen goods that blocked the flowmeters, causing 7 flowmeters to be returned to the factory for maintenance, and 5 were scrapped. The particularity of the water quality of a mine's sewage resulted in large errors and rapid damage to the sewage flowmeter. The site put forward more stringent requirements for the selection of flowmeters. 2.2 Influence of water injection volume on flowmeter 2.2.1 Water injection volume is lower than the theoretical displacement range of the flowmeter. In addition to the influence of sewage water quality on the flowmeter, the injected sewage flow also has a certain influence on the flowmeter. At present, the range of sewage flowmeter is generally 1.5-30m/h, that is, the low-level measurement is 36m/d. In Ninghai Oilfield, according to the geological needs, the injection is sometimes only 15-30m/d. Such a low water injection volume causes The water meter cannot measure. The water has been injected, but it does not show on the flow meter. 2.2.2 The low water injection volume causes the sedimentation of impurities such as oil pollution in the sewage. The water injection volume of a single well is low,It also causes the sedimentation of oil and impurities in the sewage, which adhere to the surface of the water meter body and the bend of the manifold (see Figure 1). 3. Many sewage flowmeter manufacturers cause management difficulties. For one reason or another, there are as many as eight or nine flowmeter manufacturers in one mine, and there are many manufacturers, which brings great difficulties to the on-site bamboo management.

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