A Study on the Remaining Oil After Strong Base ASP flooding

2012 ◽  
Author(s):  
Xiwen Zuo ◽  
Shiyong Li ◽  
Weiyan Li ◽  
Rue Song ◽  
Tongwei Wang ◽  
...  
Keyword(s):  
Strong Base ◽  
Asp Flooding ◽  
Remaining Oil

Research on Influence Factor of Scale in ASP Flooding

2014 ◽  
Vol 1061-1062 ◽  
pp. 267-271
Author(s):  
Zhi Feng Hou
Keyword(s):  
Calcium Carbonate ◽  
Influence Factor ◽  
Single Agent ◽  
Liquid System ◽  
Molecular State ◽  
Adsorption Effect ◽  
Strong Base ◽  
Asp Flooding ◽  
Scale Preparation ◽  
State Scale

Machine production well scaling is one of the three components flooding oil technology industrialization main bottleneck problem. With the mining into the scaling in the late three, strong base ASP flooding produced liquid system formed under the condition of the molecular state scale. Preparation of calcium carbonate particles indoor system, by using a particle size analyzer to evaluate the ASP’s single agent on the growth of calcium carbonate particle effects, to investigate the molecular state scaling mechanism, the results show that the adsorption effect on package fouling mechanism and polymer into molecular state scale.

Research on Microscopic Characteristics of Remaining Oil Distribution after Strong Alkali ASP Flooding by Laser Scanning Confocal Technology

2012 ◽  
Vol 616-618 ◽  
pp. 757-761 ◽  
Author(s):  
Yi Kun Liu ◽  
Ling Zhe Cai ◽  
Ling Yun Chen ◽  
Feng Jiao Wang
Keyword(s):  
Laser Scanning ◽  
Confocal Laser ◽  
Migration Direction ◽  
Asp Flooding ◽  
Oil Distribution ◽  
Different Types ◽  
Remaining Oil ◽  
Variation Characteristics ◽  
Displacement Effects

Different types of micro-pore structure and variation characteristics after long-term washing have a greater impact on micro-remaining-oil migration direction, distribution and content. This article applied Confocal Laser Scanning Technology to study reservoir fluid property and remaining oil micro distribution after strong alkali ASP flooding. Comparing the Laser Confocal analysis pictures of natural core after water drive and ASP flooding, coming to the conclusions that strong alkali ASP flooding sweep out larger amounts of heavy oil than water drive. Counting the ratio of different types micro-remaining-oil, and analysing on the displacement effects and mechanism of different types remaining oil after strong alkali ASP flooding.

Optimizing Structure about Strong Base ASP Flooding Molecule Weight Adjusting Mechanism

2013 ◽  
Vol 868 ◽  
pp. 614-617
Author(s):  
Chun Sheng Wang ◽  
Xu Wang ◽  
Qiu Ying Du ◽  
Bin Dong ◽  
Gui Ling Chen
Keyword(s):  
Molecular Weight ◽  
Pressure Drop ◽  
Theoretical Basis ◽  
Loss Rate ◽  
Low Permeability ◽  
Strong Base ◽  
Cylinder Length ◽  
Asp Flooding ◽  
Flow Field Characteristics ◽  
Diffuser Angle

Daqing oilfield ASP flooding drive target gradually changes from the first reservoir to the second and third reservoir,which leads to the unequal of the reservoirs producing extent, and seriously affects the developing for ASP flooding molecule weight. On the basis of that, we optimum the Molecule Weight Adjusting Mechanism of low permeability reservoir, and use the method of control variables to change the nozzle angle of diffuser section, cylinder length, diffuser angle, nozzle angle to establish 81 models. At the same time, we simulate flow field characteristics of these models with the help of Fluent. Ultimately, the models of low pressure drop and high stick loss rate could be found. Through analyzing and contrasting large of models, we found that shrinkage angle is 30 degree models under the same pressure drop condition the stick loss rate relativity high. Simultaneously, these models are suitable for the field requirements, and can provide theoretical basis for molecular weight adjusting and optimizing structure.

Laboratory Evaluation of Inter-Well Partitioning Tracers for the Determination of Remaining Oil Saturation after ASP Flooding

2015 ◽  
Author(s):  
J. Austine ◽  
D. W. van Batenburg ◽  
J. G. Southwick ◽  
M. A. Zarubinska ◽  
S. Paramanathan ◽  
...  
Keyword(s):  
Laboratory Evaluation ◽  
Oil Saturation ◽  
Asp Flooding ◽  
Remaining Oil ◽  
Partitioning Tracers

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.

Study on Scaling Formation Characteristics and Produced Liquid Properties in Oil-Wells of ASP Flooding

2012 ◽  
Vol 524-527 ◽  
pp. 1270-1278
Author(s):  
Qing He Gao ◽  
Yi Can Wang ◽  
Yu Mei Jiang
Keyword(s):  
Oil Recovery ◽  
Ph Value ◽  
Depositional Sequence ◽  
Strong Base ◽  
Asp Flooding ◽  
Calcium Magnesium ◽  
Production Period ◽  
Lifting System ◽  
The Relationship ◽  
Scale Composition

Strong base ASP flooding technology can improve oil recovery by 20%, but the lifting system exists serious scaling problems which cause pump detection period shorter. The main composition of the scale are organisms (heavy oil is in majority), carbonates and silicates. The content of each component is closely related to pH value. With high pH value, the main composition of the scale is silicate. With low pH value, the main composition of the scale is carbonate. The results of analysis of the relationship between scale composition, scaling position and depositional sequence showed that the content of silicate gradually increased from top to down in shaft while the carbonate decreased. In the process of scale deposition, carbonate scale emerged at first and then it provided attachment points and crystal nucleus for the silicate. The rough surface of carbonate scale increased the friction between the fluid and the wall, it promoted the formation of silicate. Statistically analyze the properties of pH value, alkalinity, calcium, magnesium, silicon, polymer, viscosity, surfactant, fluid yield, water content in produced liquid and their influences on scaling in the injection-production period. Establish the prediction basis using the pH value as primary and ion content as supplement for the problems of mechanical production well scaling. In the period of carbonate scaling (pH10.5), the process slowed down. The coincidence rate was 93.9% after pilot tests. It provided a basis for taking corresponding measures to inhibit scale formation.

An Evaluation on Strong Base ASP Flooding Efficiency of Multiple Layers

2015 ◽  
Author(s):  
Song Rue ◽  
Zhang Dong ◽  
Xue Cong ◽  
Chen Hong ◽  
Ran Fajiang ◽  
...  
Keyword(s):  
Strong Base ◽  
Asp Flooding

Foaming Properties and Foam Structure of Produced Liquid in Alkali/Surfactant/Polymer Flooding Production

2021 ◽  
pp. 1-25
Author(s):  
Zhihua Wang ◽  
Xiaoyu Liu ◽  
Huan Luo ◽  
Baoliang Peng ◽  
Xitong Sun ◽  
...  
Keyword(s):  
Polymer Concentration ◽  
Foaming Properties ◽  
Weak Base ◽  
Strong Base ◽  
Efficient Treatment ◽  
Asp Flooding ◽  
Chemical Agents ◽  
Foaming Behavior ◽  
Foam Stabilization ◽  
Foaming Capacity

Abstract Alkali/surfactant/polymer (ASP) flooding process is proven to be vitally effective for enhancing oil recovery (EOR) in the oil industry. However, foaming behavior is generated by the breakthrough of chemical agents in the produced liquid and is increasingly concerned as a terrible problem during production. A set of experiments was recently performed to investigate the effects of foaming properties of ASP flooding produced liquid. The factors affecting foaming capacity and foam stabilization were discussed, and the differences in foaming properties of produced liquid between strong base and weak base ASP flooding were firstly compared. The results indicated that in addition to temperature and pressure, the concentrations of chemical agents in the produced liquid were responsible for the foaming properties and foam stabilization. The foaming capacity could enhance 3∼7% at 45 °C compared with a lower temperature of 35 °C. The average comprehensive index of the foam could increase from 2.2×105 at 29 psi to 2.5×105 at 73 psi. The regularity of Plateau borders was highlighted at higher pH and surfactant concentration, and thus facilitated the foam stabilization. The liquid film thickened and its shape expanded to the state of maintaining foam stabilization with the increase of polymer concentration. Furthermore, the foaming behavior of produced liquid in strong base ASP flooding production is much more troublesome than that in weak base ASP flooding production. This study is significant in that it further supports the development of efficient treatment technology for produced liquid in oilfield.

Sign in / Sign up

Export Citation Format

Share Document