The Investigation of Potential Residual Oil Tapping Technique in the Late Stage of High Water Cut Period in Daqing Oilfield

2004 ◽  
Author(s):  
He Liu ◽  
Jianwen Yan ◽  
Han Hongxue ◽  
Cao Gang
Keyword(s):  
Late Stage ◽  
High Water ◽  
Residual Oil ◽  
High Water Cut ◽  
Water Cut

scholarly journals Dual Completion Petroleum Production Engineering for Several Oil Formations

2018 ◽  
Vol 26 (4) ◽  
pp. 217-221
Author(s):  
Tanyana Nikolaevna Ivanova ◽  
Aleksandr Ivanovich Korshunov ◽  
Vladimir Pavlovich Koretckiy
Keyword(s):  
Production Technology ◽  
Oil Recovery ◽  
Late Stage ◽  
Recovery Rate ◽  
High Water ◽  
Production Engineering ◽  
Petroleum Production ◽  
Cost Efficient ◽  
High Water Cut ◽  
Water Cut

Abstract Cost-efficient, enabling technologies for keeping and increasing the reservoir recovery rate of oil-formations with high water cut of produced fluids and exhausted resource are really essential. One of the easiest but short-term ways to increase oil production and incomes at development of oil deposits is cost of development and capital cost reduction. Therefore, optimal choice and proper feasibility study on the facilities for multilayer oil fields development, especially at the late stage of reservoir working, is a crucial issue for now-day oil industry. Currently, the main oil pools do not reach the design point of coefficient of oil recovery. The basic feature of the late stage of reservoir working is the progressing man-made impact on productive reservoir because of water injection increasing for maintaining reservoir pressure. Hence cost-efficient, enabling technologies for keeping and increasing the reservoir recovery rate of oil-formations with high water cut of produced fluids and exhausted resource are really essential. To address the above concerns the dual completion petroleum production engineering was proposed. The intensity of dual completion of formation with of different permeability is determined by rational choice of each of them. The neglect of this principle results a disproportionately rate of highly permeable formations development for the time. In effect the permeability of the formations or their flow rate is decreasing. The problem is aggravated by lack of awareness of mechanics of layers' mutual interference in producers and injectors. Dual completion experience in Russian has shown, that success and efficiency of the technology in many respects depend on engineering support. One of the sufficient criteria for the choice of operational objects should be maximal involvement of oil-saturated layers by oil displacement from seams over the economic life of well producing oil. If it is about getting high rate of oil recovery for irregular formations there is no alternative to dual completion and production. The recommended dual completion petroleum production technology enables development several formations by single well at the time. The dual completion petroleum production technology has been more important than ever because it is right not only for formations but for thin layers with undeveloped remaining reserves.

scholarly journals Response to the Variation of Clay Minerals During ASP Flooding in the Saertu Oilfield in the Songliao Basin

2021 ◽  
Vol 9 ◽  
Author(s):  
Liang Yingjie ◽  
Liang Wenfu ◽  
He Wang ◽  
Li Zian
Keyword(s):  
Clay Minerals ◽  
Oil Recovery ◽  
High Water ◽  
Songliao Basin ◽  
Residual Oil ◽  
Pore Throat ◽  
Asp Flooding ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut

In this paper, the variation of clay minerals and their influence on reservoir physical properties and residual oil before and after ASP flooding are analyzed. The results show that the total amount of clay minerals in reservoirs decreases after ASP flooding in the ultra-high-water-cut-stage reservoirs of the Naner Zone in the Saertu Oilfield, Songliao Basin. Therein, the illite content reduces, while the content of illite smectite mixed-layer and chlorite increases. The content of kaolinite varies greatly. The content of kaolinite decreases in some samples, while it increases in other samples. The clay minerals block the pore throat after ASP flooding. As a result, the pore structure coefficient and the seepage tortuosity increase, the primary intergranular pore throat shrinks, and the pore–throat coordination number decreases. Nevertheless, the dissolution of clay minerals reduces the pore–throat ratio and increases porosity and permeability. The variation of clay minerals after ASP flooding not only intensifies the reservoir heterogeneity but also affects the formation and distribution of residual oil. The residual oil of the oil–clay mixed adsorption state is a newly formed residual oil type related to clay, which accounts for 44.2% of the total residual oil reserves, so it is the main occurrence form of the oil in reservoirs after ASP flooding. Therefore, the exploitation of this type of residual oil has great significance to enhance the oil recovery in ultra-high-water-cut-stage reservoirs.

Study on the Microscopic Residual Oil of CO2Flooding for Extra-High Water-Cut Reservois

2016 ◽  
pp. 319-329
Author(s):  
Zengmin Lun ◽  
Rui Wang ◽  
Chengyuan Lv ◽  
Shuxia Zhao ◽  
Dongjiang Lang ◽  
...  
Keyword(s):  
High Water ◽  
Residual Oil ◽  
High Water Cut ◽  
Water Cut

scholarly journals Pore-scale investigation of residual oil distributions and formation mechanisms at the extra-high water-cut stage

2017 ◽  
Vol 62 (22) ◽  
pp. 2553-2563 ◽  
Author(s):  
AiFen LI ◽  
Kai ZHANG ◽  
GuangPu ZHU ◽  
Hai SUN ◽  
Jun YAO ◽  
...  
Keyword(s):  
High Water ◽  
Formation Mechanisms ◽  
Pore Scale ◽  
Residual Oil ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut

Residual Oil Distribution and Stimulation for SZ 36-1 Oilfield in High Water-Cut Stage

2014 ◽  
Vol 675-677 ◽  
pp. 1530-1534
Author(s):  
Biao Li ◽  
Hong Zhang
Keyword(s):  
Oil Recovery ◽  
High Water ◽  
Oil Well ◽  
Residual Oil ◽  
Oil Distribution ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Reservoir Description ◽  
Water Cut ◽  
Enhance Oil Recovery

SZ 36-1 oilfield has entered high water cut stage, and thus research on the distribution of oil is important for tapping potential in oilfield. In this paper, the distribution of residual oil of SZ 36-1 oilfield was discussed by fine reservoir description and dynamic analysis. The saturation of residual oil at faults, “died oil” between two well, the top of positive rhythm sand body and low (no) permeability interlayer is higher than other situations. We point out that infilling adjustment wells, increasing the oil well productivity and structure adjustment of produced liquid are efficient measures to enhance oil recovery for SZ 36-1 oilfield .

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