Residual Oil Distribution Law and Controlling Factors of Chang 6 Reservoir in Liutai Area

2014 ◽  
Vol 1010-1012 ◽  
pp. 1735-1739
Author(s):  
Feng Run Zhang ◽  
Ai Hua Guo ◽  
Huai En Cai
Keyword(s):  
Sedimentary Facies ◽  
Geological Structure ◽  
Controlling Factors ◽  
Water Flooding ◽  
Residual Oil ◽  
Distribution Law ◽  
Total Recovery ◽  
Main Layer ◽  
Oil Distribution ◽  
Distribution Laws

Because of the high heterogeneity, late water flooding and irregular well network, the distribution law of residual oil reserve in Chang 6 reservoir becomes much complicated. Combining the geology with dynamics of the reservoir, volumetric and formation coefficient methods are adapted to calculated the residual reserves, and then the distribution laws and controlling factors are analyzed. The results indicate that: there are still large amounts of residual reserve in main layer Chang 622; the residual reserve can be classified into three kinds, Class I and class II are distributed concentrative in main layer; the controlling factors include property, sedimentary facies, heterogeneity, well network controlling and geological structure and so on. Finally, according to the distribution laws and controlling factors, targeted measures are proposed. The studying results provide well foundations for improving recovery of residual oil reserves and the total recovery of the reservoir.

Research on Residual Oil Distribution Regular with the Application of Facies Controlled Modeling and Reservoir Numerical Simulation

2012 ◽  
Vol 616-618 ◽  
pp. 126-132 ◽  
Author(s):  
Hua Bin Wei ◽  
Shang Ming Shi ◽  
Pan Zhao ◽  
Dong Kai Huo ◽  
Wan Zhen Zhu
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Simulation Method ◽  
Structural Features ◽  
Development Stage ◽  
Water Flooding ◽  
Residual Oil ◽  
Distribution Law ◽  
North West ◽  
Oil Distribution

The high water cut stage on the residual oil distribution regularity in late development stage of oilfield is difficult in Daqing oilfield, North West Water Flooding fine demonstration zone development time is long, well under the complicated characteristic, adopts phase control of three-dimensional geological modeling and the method of reservoir numerical simulation in the demonstration zone, structural features and sedimentary characteristics of based on the establishment of demonstration zone, three-dimensional geological model. Through the application of fine reservoir numerical simulation method for the numerical simulation of remaining oil, and a summary of the demonstration zone of residual oil distribution law and cause of formation, provides reliable basis for the next step of oilfield development adjustment.

scholarly journals Quantitative Study of Residual Oil Distribution during Water Flooding through Digital Core Analysis

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xuechao Liu ◽  
Dazhong Ren ◽  
Fengjuan Dong ◽  
Junxiang Nan ◽  
Ran Zhou
Keyword(s):  
Ct Scanning ◽  
Water Flooding ◽  
Fluid Distribution ◽  
Core Analysis ◽  
Residual Oil ◽  
Tight Sandstone ◽  
Oil Storage ◽  
Oil Distribution ◽  
Distribution Features ◽  
Digital Core

The character of residual oil formed during water flooding, one important technique to enhance oil recovery, is helpful to further study permeability and recovery in tight sandstone oil reservoirs. In this paper, we take a tight sandstone reservoir in Ordos Basin as the research object and use in situ displacement X-CT scanning technology to analyze the dynamic characteristics of oil during water flooding. Firstly, core pore radius and oil storage space radius were measured from digital cores which are acquired in different water flooding stages by X-CT scanning technology. Secondly, analytical and evaluation methods were established to describe fluid distribution in the pore space of the core in different water flooding stages based on curve similarity. Finally, by numerical results, we analyzed the oil distribution features in the process of water flooding for core samples. In this paper, the oil distribution characteristics during water flooding are revealed based on digital core analysis. Also, a quantitative evaluation method is given to provide theoretical guidance.

scholarly journals Determination of Residual Oil Distribution after Water Flooding and Polymer Flooding

2013 ◽  
Vol 5 (8) ◽  
pp. 2642-2647
Author(s):  
Yining Wang ◽  
Xiaodong Wu ◽  
Fengpeng Lai ◽  
Zhaopeng Yang ◽  
Man Teng
Keyword(s):  
Polymer Flooding ◽  
Water Flooding ◽  
Residual Oil ◽  
Oil Distribution

The Influence of Microscopic Pore Structure on Microscopic Residual Oil in Sandstone Reservoir

2013 ◽  
Vol 787 ◽  
pp. 721-725 ◽  
Author(s):  
Yan Zhang ◽  
Xin Li
Keyword(s):  
Pore Structure ◽  
Water Flooding ◽  
Structure Effect ◽  
Residual Oil ◽  
Thin Sections ◽  
Unresolved Problem ◽  
Oil Distribution ◽  
Cluster Type ◽  
Sandstone Reservoir ◽  
Different Origin

The distribution of microscopic residual oil varied according to the character of rock pore structure. How pore structure effect residual oil distribution is still an unresolved problem. In this paper, different origin samples were collected, then the characters of microscopic pore structure was analyzed with mercury injection curves, casting thin sections and SEM. The character of microscopic residual oil was observed with fluorescence thin sections. The study showed that after strong water flooding, the microscopic residual oil was mainly composed of intergranular type and cluster type residual oil, but the proportion of different type of residual oil varied according to different microscope pore structure. the smaller the radius of pore structure is, the higher the proportion of intergranular type and cluster type remaining oil is, but the lower the proportion of corner type, membranous type and throat type is.

The Temperature Field Distribution in Thermal Recovery and the Study on Residual Oil Distribution Laws

2013 ◽  
Vol 787 ◽  
pp. 693-698
Author(s):  
Bo Li ◽  
Hao Zhang ◽  
Anan Liu ◽  
Hua Bin Wei ◽  
Xue Du ◽  
...  
Keyword(s):  
Temperature Field ◽  
Field Distribution ◽  
High Water ◽  
Thermal Recovery ◽  
Test Area ◽  
Water Flooding ◽  
Residual Oil ◽  
Temperature Field Distribution ◽  
Distribution Features ◽  
Distribution Laws

Western Bei II Area in Saertu Oilfield, Daqing Oilfield is the test area. It has now entered an exploitation phase of extra high water cut stage. Under the circumstance of a long time of development and complex conditions of well history in this area, it has experienced water flooding, polymer flooding and thermal recovery. Based on basic geological characteristics in the test area, this study establishes three-dimensional geological static models and conducts the fine reservoir numerical simulation of the test area. In addition, it summarizes the temperature field distribution features before and after the thermal recovery as well as causes and distribution laws of the residual oil, which provides a reliable basis for development, deployment and measures to adjust in the next step in oilfields.

scholarly journals SURFACTANT-POLYMER FLOODING PERFORMANCE IN HETEROGENEOUS TWO-LAYERED POROUS MEDIA

2011 ◽  
Vol 12 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Muhammad Taufiq Fathaddin ◽  
Asri Nugrahanti ◽  
Putri Nurizatulshira Buang ◽  
Khaled Abdalla Elraies
Keyword(s):  
Porous Media ◽  
Oil Recovery ◽  
Polymer Flooding ◽  
Water Flooding ◽  
Residual Oil ◽  
Oil Saturation ◽  
Reservoir Heterogeneity ◽  
Residual Oil Saturation ◽  
Layered Porous Media ◽  
Multiple Porosity

In this paper, simulation study was conducted to investigate the effect of spatial heterogeneity of multiple porosity fields on oil recovery, residual oil and microemulsion saturation. The generated porosity fields were applied into UTCHEM for simulating surfactant-polymer flooding in heterogeneous two-layered porous media. From the analysis, surfactant-polymer flooding was more sensitive than water flooding to the spatial distribution of multiple porosity fields. Residual oil saturation in upper and lower layers after water and polymer flooding was about the same with the reservoir heterogeneity. On the other hand, residual oil saturation in the two layers after surfactant-polymer flooding became more unequal as surfactant concentration increased. Surfactant-polymer flooding had higher oil recovery than water and polymer flooding within the range studied. The variation of oil recovery due to the reservoir heterogeneity was under 9.2%.

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