The Research of Micro-Flocculation Suspended Sludge Filtration Technology in the Treatment of Oilfield Wastewater

2013 ◽  
Vol 742 ◽  
pp. 257-261
Author(s):  
Jin Lai Feng ◽  
Lei Zhang ◽  
Song Wang ◽  
Ye Ming Zeng
Keyword(s):  
Field Test ◽  
Oil Recovery ◽  
Oil Content ◽  
Removal Rate ◽  
Oil Field ◽  
Water Flooding ◽  
Optimal Dosage ◽  
Average Content ◽  
Filtration Process ◽  
Filtration Technology

Enhanced Oil Recovery has been used in most oil field of China, but the oil field wastewater was more difficult to treat than that from water flooding. In this paper, FX flocculants (FX-F) prepared in our laboratory was chosen as the optimal flocculants compared with aluminium polychlorid (PAC), polyaluminium ferric chloride (PAFC). The optimal dosage of FX flocculants was 4 mg/L based on the field test, at which the SS content of treated oil field wastewater reduced sharply within 10 hours. The 15 mg/L of the FX-F would be the most convenient to form the sludge layer. Taking FX-F as flocculants, the oil field wastewater was treated in the micro-flocculation suspended sludge filtration process, and the results showed that the SS and Oil of wastewater could be significantly be reduced. In the end, the average oil content was lower than 1 mg/L and the removal rate can reach 99%, and the average content and the removal efficiency of SS was 1.26 mg/L and 95% respectively, which can really meet the standards for oil field rejection water.

Use of Diverter Compositions for Enhancing the Effectiveness of Oil Recovery from Productive Deposits

2018 ◽  
Vol 785 ◽  
pp. 159-170
Author(s):  
Vadim Aleksandrov ◽  
Kirill Galinskij ◽  
Andrey Ponomarev ◽  
Vadim Golozubenko ◽  
Yuriy Sivkov
Keyword(s):  
Oil Recovery ◽  
Complex Structure ◽  
Water Injection ◽  
Geological Structure ◽  
Oil Field ◽  
Field Analysis ◽  
Water Flooding ◽  
Simple Method ◽  
Oil Companies ◽  
Porosity And Permeability

One of the most important aspects in the activities of oil companies in the Western Siberia is to improve the effectiveness of water-flooding as the main method of impact on the formation. This is due to the fact that at the present time reservoirs of a complex structure with difficult to recover reserves prevail among newly introduced development objects, the extraction of which is extremely difficult using a simple method of water injection volumes regulation. First of all, this refers to reservoirs of Jurassic deposits, which are characterized by the most complex geological structure and porosity and permeability properties. A promising direction in improving the water-flooding system at such objects is the use of physical and chemical technologies to enhance the oil recovery of formations, and primarily, referring to the diverter technology. The research objective is to evaluate the effectiveness of using “hard” type diverter compositions to enhance oil recovery of formations. With the help of detailed oil-field analysis and field-geophysical studies, the nature of the development of oil reserves for Jurassic development sites has been assessed.

scholarly journals Experimental Investigation of the Effects of Water and Polymer Flooding on Geometric and Multifractal Characteristics of Pore Structures

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5288
Author(s):  
Xianguo Zhang ◽  
Chengyan Lin ◽  
Yuqi Wu ◽  
Tao Zhang ◽  
Hongwei Wang ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Water Injection ◽  
Total Porosity ◽  
Polymer Flooding ◽  
Oil Field ◽  
Water Flooding ◽  
Reservoir Quality ◽  
Thin Sections ◽  
X Ray ◽  
Pore Structures

During water and polymer flooding for enhanced oil recovery, pore structures may vary because of the fluid–rock interactions, which can lead to variations in petrophysical properties and affect oil field production. To investigate the effects of fluid flooding on pore structures, six samples were subjected to brine water, dual-system, and alkaline–surfactant–polymer (ASP) polymer displacement experiments. Before and after experiments, samples were scanned by X-ray CT. Thin sections, X-ray diffraction, and high pressure mercury injection tests were also carried out to characterize mineralogy and fractal dimension of pore systems before experiments. Experiment results show that water flooding with low injection pore volume ratio (IPVR) can improve reservoir quality since total porosity and connected porosity of samples rise after the flooding and the proportion of large pores also increases and heterogeneity of pore structure decreases. However, water flooding with high IPVR has reverse effects on pore structures. Polymer flooding reduces the total porosity, connected porosity, the percentage of small pores and enhances the heterogeneity of pore structures. It can be found that pore structures will change in fluid flooding and appropriate water injection can improve reservoir quality while excessive water injection may destroy the reservoir. Meanwhile, injected polymer may block throats and destroy reservoirs. The experimental results can be used as the basis for oil field development.

scholarly journals CO2 Storage and Enhanced Oil Recovery: Sugar Creek Oil Field Test Site, Hopkins County, Kentucky

2013 ◽  
Author(s):  
Scott Frailey ◽  
Thomas Parris ◽  
James Damico ◽  
Roland Okwen ◽  
Ray McKaskle
Keyword(s):  
Enhanced Oil Recovery ◽  
Field Test ◽  
Oil Recovery ◽  
Co2 Storage ◽  
Test Site ◽  
Oil Field

scholarly journals Optimisation of Smart Water to Enhance Oil Recovery Efficiency in a Part of Oil Field of Upper Assam Basin, India

2019 ◽  
Vol 9 (2) ◽  
pp. 3620-3626
Keyword(s):  
Oil Recovery ◽  
Ionic Composition ◽  
Oil Field ◽  
Water Flooding ◽  
Rock Surface ◽  
Recovery Efficiency ◽  
Smart Water ◽  
Original Oil In Place ◽  
Brine Salinity ◽  
Secondary Mode

Researchers have proved the significance of water injection by tuning its composition and salinity into the reservoir during smart water flooding. Once the smart water invades through the pore spaces, it destabilises crude oil-brine-rock (COBR) that leads to change in wettability of the reservoir rocks. During hydrocarbon accumulation and migration, polar organic compounds were being adsorbed on the rock surface making the reservoir oil/mixed wet in nature. Upon invasion of smart water, due to detachment of polar compounds from the rock surfaces, the wettability changes from oil/mixed wet to water wet thus enhances the oil recovery efficiency. The objective of this paper is to find optimum salinity and ionic composition of the synthetic brines at which maximum oil recovery would be observed. Three core flood studies have been conducted in the laboratory to investigate the effect of pH, composition and salinity of the injected brine over oil recovery. Every time, flooding has been conducted at reservoir formation brine salinity i.e at 1400 ppm followed by different salinities. Here, tertiary mode of flooding has been carried out for two core samples while secondary flooding for one. Results showed maximum oil recovery by 40.12% of original oil in place (OOIP) at 1050ppm brine salinity at secondary mode of flooding. So, optimized smart water has been proposed with 03 major salts, KCl, MgCl2 and CaCl2 in secondary mode of flooding that showed maximum oil recovery in terms of original oil in place.

scholarly journals Vankor oil field development experience

2019 ◽  
pp. 47-51
Author(s):  
Evgeny V. Panikarovskii ◽  
Valentin V. Panikarovskii ◽  
Alexandra E. Anashkina
Keyword(s):  
Oil Recovery ◽  
New Technologies ◽  
Development Rate ◽  
Oil Field ◽  
Water Flooding ◽  
Energy Potential ◽  
Field Development ◽  
Oil Field Development ◽  
Third Stage ◽  
Recovery Technique

The Vankor oil field is in the third stage of the development. Well stock mostly includes horizontal and directional wells. Analysis of the field development showed that actual development rate is much higher than planned. Energy potential of the field is drained out due to formation pressure decline and water flooding. New technologies for restoring well productivity, such as acid treatment and hydraulic fracturing should be introduced to maintain planned development rate. Drilling multilateral wells should be used as main enhanced oil recovery technique.

scholarly journals Experimental Study of Chemical Flooding of Suizhong 36-1 Oilfield

2015 ◽  
Vol 8 (1) ◽  
pp. 392-397 ◽  
Author(s):  
Pi Yanfu ◽  
Guo Xiaosai ◽  
Pi Yanming ◽  
Wu Peng
Keyword(s):  
Oil Recovery ◽  
Pore Volume ◽  
Polymer Flooding ◽  
Oil Field ◽  
Water Flooding ◽  
Chemical Flooding ◽  
Recovery Efficiency ◽  
Displacement Efficiency ◽  
Displacement Effect ◽  
Binary Combination

Aim at the reservoir characteristics of Suizhong 36-1 Oil Field, this paper has developed typical two-dimensional physical model in parallel between the layers and studied the macroscopic displacement effect of polymer flooding and binary compound flooding, and studied the interlayer spread law and oil displacement efficiency of polymer flooding and binary combination flooding by using saturation monitoring system deeply. The results show that: when the multiples of pore volume injected for polymer was 0.3 after water flooding, the recovery efficiency increased by 10.3%, and when the multiples of pore volume injected for binary combination flooding was 0.3 after polymer flooding and the recovery efficiency could also increase by 19.3%, and the effect of enhanced oil recovery was obvious during the binary combination flooding and polymer flooding; Saturation monitoring data showed that there formed oil wall and increased the flow resistance and expanded the swept volume during the stage of polymer flooding and binary combination flooding, effective use of low-permeability layer was the key to improve oil recovery.

scholarly journals Status Quo of a CO2-Assisted Steam-Flooding Pilot Test in China

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Zongyao Qi ◽  
Tong Liu ◽  
Changfeng Xi ◽  
Yunjun Zhang ◽  
Dehuang Shen ◽  
...  
Keyword(s):  
Field Test ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Oil Production ◽  
Oil Field ◽  
Drainage Pattern ◽  
Steam Flooding ◽  
Production Wells ◽  
Water Cut ◽  
Production Dynamics

It is challenging to enhance heavy oil recovery in the late stages of steam flooding. This challenge is due to reduced residual oil saturation, high steam-oil ratio, and lower profitability. A field test of the CO2-assisted steam flooding technique was carried out in the steam-flooded heavy oil reservoir in the J6 block of the Xinjiang oil field (China). In the field test, a positive response to the CO2-assisted steam flooding treatment was observed, including a gradually increasing heavy oil production, an increase in the formation pressure, and a decrease in the water cut. The production wells in the test area mainly exhibited four types of production dynamics, and some of the production wells exhibited production dynamics that were completely different from those during steam flooding. After being flooded via CO2-assisted steam flooding, these wells exhibited a gravity drainage pattern without steam channeling issues, and hence, they yielded stable oil production. In addition, emulsified oil and CO2 foam were produced from the production well, which agreed well with the results of laboratory-scale tests. The reservoir-simulation-based prediction for the test reservoir shows that the CO2-assisted steam flooding technique can reduce the steam-oil ratio from 12 m3 (CWE)/t to 6 m3 (CWE)/t and can yield a final recovery factor of 70%.

Managing limited subsurface data in a mature oil field case study: extending the production lifetime of a 50-year-old oil field in Indonesia: Rantau oil field Waterflood Pilot Project

2013 ◽  
Vol 53 (2) ◽  
pp. 489
Author(s):  
Reza Ardianto
Keyword(s):  
Oil Recovery ◽  
Oil And Gas ◽  
Oil Production ◽  
Pilot Project ◽  
Oil Field ◽  
Oil Fields ◽  
Water Flooding ◽  
Peak Oil ◽  
Screening Criteria ◽  
The Government

Business management of oil and gas in Pertamina State Oil enterprises was handed to one of its subsidiaries: Pertamina EP (PEP). With a vast working area of 140,000 km2, it consists of 214 fields where 80% is an old field (mature field or brown field). Most of these oil fields were discovered during Dutch colonialism. One of these fields was Rantau oil field, discovered in 1928; it is considered one of potential structure at the time. Peak oil production was achieved at 31,711 barrels of oil per day (BOPD) (wc 17.2%) in 1969, and it is still producing 2,500 BOPD from primary stage.To get better recovery from the Rantau oil field, it is necessary to identify the potential of secondary recovery water-flooding. Some screening criteria had been completed to select an appropriate method that could be applied in the Rantau field. PEP is preparing an Enhanced Oil Recovery (EOR) program to be applied in some oil fields with subsurface and surface potential consideration. The implementation was initiated by the EOR Department at PEP. The issue of the national oil production increasing program from the government has to be realised by the EOR Department at Pertamina EP. Following the national oil increasing program, management of PEP urged to increase oil production in a rapid and realistic way. As a result, the program of secondary and tertiary recovery pilot project should be conducted simultaneously by the EOR Department on some of the fields that have passed their peak. On the other hand, PEP has only limited geology, geophysics, reservoir, and production (GGRP) data, and most of the oil fields have been producing since 1930s. The conditions that have to be dealt with are as follows: production from the existing field is declining, data is collected and interpreted during a long period, huge amounts of production data, and reservoir model and simulation do not exist and are not frequently updated. Based on this, the planning of EOR struggled due to length of time needed versus the need for quick development. It has become much more of a challenge for the team consisting of integrated geophysics, geology, reservoir, production, process facility, project management and economic evaluation. This extended abstract presents the term of managing limited GGRP data that contributes to the successful pilot waterflood project in the Rantau field. It also explains the uses of limited subsurface GGRP data to overcome the uncertainty for planning of the waterflood pilot project in the Rantau field, as a part of planning using limited data.

The Study of Axial Dynamic Backwashing Dual-Media Filter Experiment

2013 ◽  
Vol 781-784 ◽  
pp. 2067-2070
Author(s):  
Zhong Chen Yu ◽  
Xue Jiao Zhang ◽  
Song Wang ◽  
Bing Sun ◽  
Xian Jun Zhou
Keyword(s):  
Water Quality ◽  
Oil Content ◽  
Produced Water ◽  
Removal Rate ◽  
Oil Field ◽  
Walnut Shell ◽  
Polymeric Compound ◽  
Filter Materials ◽  
Suspended Substance ◽  
High Removal Rate

According to the problem of polymeric compound appearing in oil field produced water, following by the changes of water quality characteristics that result in the polymeric compound accumulated in the filter tank which lead to the poor regeneration, being partly hardened and the losing, and the over standard of water quality, the study uses the technology of axial dynamic backwashing to back wash and regenerate the dual-media filter of walnut shell/quartz sand. The removal rate of oil content for filter materials reaches above 90% after backwashing. Simultaneously, cleaning the granular filter materials in filter bed achieves high removal rate of oil and suspended substance content, the average removal rate of oil content being 96.0% while the suspended substance 77.81% which greatly improved the water quality index.

The Characterization of the Rock Microscopic Pore Structure before and after Strong Base ASP Flooding

2014 ◽  
Vol 941-944 ◽  
pp. 2596-2600
Author(s):  
Meng Fan ◽  
Yi Kun Liu ◽  
Shuang Liang
Keyword(s):  
Pore Structure ◽  
Oil Recovery ◽  
Production Efficiency ◽  
High Water ◽  
Oil Field ◽  
Water Flooding ◽  
Strong Base ◽  
Asp Flooding ◽  
Before And After ◽  
Scaling Phenomenon

ASP flooding technology is an important means to further improve oil recovery of oil field later high water-cut stage. As is found in pilot test of ASP flooding, in the process of injecting ASP combinational flooding fluid, alkaline chemical react with the rocks minerals in reservoir and dissolve and elute the portion of the silicon in rocks minerals after injecting into formation. Due to the mixed flow occurred in near well bore zone and the changes in pressure and temperature, produced liquid produces mixed silicon scale near the well .The serious scaling phenomenon has affected the production efficiency and the further popularization of the ASP flooding technology.The serious scaling phenomenon has affected the production efficiency and the further popularization of the ASP flooding technology.It is very important to study and solve the problem of ASP flooding silicon scale.In this paper,we studied the interaction ternary displacement liquid and formation, analysised the physical and chemical processes of silicon scale, researched and analysised the differences on the microscopic pore structure between water flooding cores and ASP flooding cores as well as the situation of silicon scale after the ASP flooding by using SEM technology.

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