Advancement and Application of Thermal Recovery Technology in Heavy Oil Reservoir in Shengli Petroleum Province

2011 ◽  
Author(s):  
Fang Jian Sun ◽  
Li Zhenquan ◽  
Wu Guanghuan
Keyword(s):  
Heavy Oil ◽  
Thermal Recovery ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir

Research Status and Prospect of Heavy Oil Recovery Technology

2021 ◽  
Vol 888 ◽  
pp. 111-117
Author(s):  
Yi Zhao ◽  
De Yin Zhao ◽  
Rong Qiang Zhong ◽  
Li Rong Yao ◽  
Ke Ke Li
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Development Trend ◽  
Thermal Recovery ◽  
Hot Water ◽  
Water Flooding ◽  
Oil Reservoir ◽  
Heavy Oil Recovery ◽  
Steam Flooding ◽  
Heavy Oil Reservoir

With the continuous exploitation of most reservoirs in China, the proportion of heavy oil reservoirs increases, and the development difficulty is greater than that of conventional reservoirs. In view of the important subject of how to improve the recovery factor of heavy oil reservoir, the thermal recovery technology (hot water flooding, steam flooding, steam assisted gravity drainage SAGD and steam huff and puff) and cold recovery technology (chemical flooding, electromagnetic wave physical flooding and microbial flooding) used in the development of heavy oil reservoir are summarized. The principle of action is analyzed, and the main problems restricting heavy oil recovery are analyzed The main technologies of heavy oil recovery are introduced from the aspects of cold recovery and hot recovery. Based on the study of a large number of literatures, and according to the development trend of heavy oil development, suggestions and prospects for the future development direction are put forward.

Study on Heating Zone and Producing Zone of Cyclic Steam Stimulation with Horizontal Well in Heavy Oil Reservoir

2012 ◽  
Vol 594-597 ◽  
pp. 2438-2441 ◽  
Author(s):  
Shi Jun Huang ◽  
Ping Hu ◽  
Qiu Li
Keyword(s):  
Heavy Oil ◽  
Horizontal Well ◽  
Thermal Recovery ◽  
Oil Reservoir ◽  
Heating Zone ◽  
Oil Viscosity ◽  
Cyclic Steam Stimulation ◽  
Heavy Oil Reservoir ◽  
Critical Viscosity ◽  
Steam Stimulation

In this paper, employing reservoir simulation and mathematical analysis methods, considering typical heavy oil reservoir and fluid thermal properties, the heating and producing shape of thermal recovery with horizontal well for different heavy oil reservoirs including ordinary, extra and super heavy oil are investigated based on the modification of thermal recovery parameters of different viscosity. By introducing heating radius and producing radius and considering the coupling effect of temperature, pressure and oil saturation fields, a quantitative expression between heating radius/producing radius and oil viscosity, formation thickness is presented, so is the impact of oil viscosity on the heating radius. Results shows that for Cyclic Steam Stimulation, the producing radius of horizontal well is bigger than its heating radius for light oil, both of which, however, shrink with higher viscosity. Beyond a critical viscosity, where the heating radius equals to the producing radius, the heating radius of horizontal well would be bigger than its producing radius. More over, the critical viscosity shows tight relationship to the formation thickness.

Analysis of the Flow Velocity of Heavy Oil Reservoir Flooding Vent Complex Process

2014 ◽  
Vol 1015 ◽  
pp. 308-311
Author(s):  
Jia Mei Geng
Keyword(s):  
Heavy Oil ◽  
Thermal Recovery ◽  
Oil Reservoir ◽  
Oil Exploration ◽  
Seepage Velocity ◽  
Reservoir Development ◽  
Complex Process ◽  
World Demand ◽  
Heavy Oil Reservoir ◽  
The Impact

With the deepening of the degree of oil exploration and development, as well as the rapid growth of world demand for oil, heavy oil reservoir development is becoming increasingly important in the position in oil exploration. For reserves a great deal of ultra heavy oil reservoir at present, conventional thermal recovery technology is difficult to obtain a good development effect. In this study we use computational fluid dynamics software ANYSY CFX to analyze the impact of horizontal and vertical pressure gradient on the seepage velocity difference..

Cyclic Steam Stimulation Effect on Skin Factor Reviewed Case Study

2016 ◽  
Vol 818 ◽  
pp. 287-290 ◽  
Author(s):  
Wan Rosli Wan Sulaiman ◽  
Azza Hashim
Keyword(s):  
Production Rate ◽  
Heavy Oil ◽  
Development Program ◽  
Thermal Recovery ◽  
Reservoir Rock ◽  
Oil Reservoir ◽  
Oil Viscosity ◽  
Cyclic Steam Stimulation ◽  
Heavy Oil Reservoir ◽  
Steam Stimulation

High oil viscosity is a major concern for recovery from heavy oil reservoir. Introducing heat to the formation has proven to be an effective way to improve mobility. The Heat transfer to the oil and reservoir rock is good for thermal recovery. The thermal recovery involves a well-known technique of cyclic steam stimulation which actually effect the nearby well area. Heavy oil reservoir which uses the thermal technique will experience the change of property. Fula North East (FNE) Sudanese field is located in the north-eastern part of Fula sub-basin. According to the development program of FNE, Bentiu layer (of Bentiu group) is the targeted reservoir where the pressure gradient is 285.65 psi/100m, perforation intervals is 540-533 m, and the average oil production rate of single well by applying the cyclic steam stimulation (CSS) is 236 bbl/d. For well- Q, (one of the hot wells) to void the bottom water the average production rate is 191 bbl/d. A minor change is observed in the key properties of the well when the skin affect is varied.

Exploration Method for Extra Heavy Oil Reservoir with Top Water

2011 ◽  
Vol 243-249 ◽  
pp. 6237-6240
Author(s):  
You Jun Ji ◽  
Jian Jun Liu ◽  
Nelly Zhang
Keyword(s):  
Heavy Oil ◽  
Volume Fraction ◽  
Thermal Recovery ◽  
Gravity Drainage ◽  
Oil Reservoir ◽  
Steam Assisted Gravity Drainage ◽  
Production Parameters ◽  
Liaohe Oilfield ◽  
Modeling Software ◽  
Heavy Oil Reservoir

For an extra heavy oil reservoir with top water in Liaohe Oilfield, it is inefficiently and hard to produce by conventional thermal recovery. In this regard, the numerical modeling software – CMG is used to analyze the recovery of this reservoir by Steam-Assisted Gravity Drainage (SAGD) and Steam and incondensable gas-assisted gravity push (SAGP). The production indicators, development effects and distribution of field parameters of these two techniques are contrasted and analyzed, and the injection and production parameters for application of SAGP in wells are optimized. The study shows that, for this extra heavy oil reservoir with top water, SAGP is more effective than SAGD, and the former can reduce the steam demand, improve the oil/steam ratio (OSR), prolong the development and enhance the recovery. It is recommended, during application of SAGP on site, to inject nitrogen at volume fraction of 30-40% and when the steam chamber expands to a section with 1/3 net pay thickness away to the top water.

Thermal Recovery Technology Research and Application of Thin Heavy Oil Reservoir

2010 ◽  
Author(s):  
Guofeng Wang ◽  
Deying Jiang ◽  
Haijing Zhao ◽  
yingxin Qu ◽  
Yong Chen ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Thermal Recovery ◽  
Oil Reservoir ◽  
Technology Research ◽  
Heavy Oil Reservoir

scholarly journals Study on Viscosity Reducer Flooding Technology for Deep Low Permeability Extra Heavy Oil Reservoirs

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Xiaopeng Cao ◽  
Zupeng Liu ◽  
Yong Yang ◽  
Shiming Zhang ◽  
Yahui Bu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Crude Oil ◽  
Heavy Oil ◽  
Thermal Recovery ◽  
Water Soluble ◽  
Viscosity Reduction ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Viscosity Reducer ◽  
Heavy Oil Reservoir

Deep low permeability extra heavy oil reservoir has the characteristics of high formation pressure, high crude oil viscosity, and low permeability. Conventional steam injection thermal recovery has poor viscosity reduction performance and low productivity of a single well, which makes it difficult to develop this type of heavy oil reservoir. In this paper, core flooding experiment and microvisualization equipment were used to study the mechanism of improving the recovery of deep extra heavy oil by using water-soluble viscosity reducer; the realization of water-soluble viscosity reducer in numerical simulation was achieved by using nonlinear mixing rule; the reservoir numerical simulation model of water-soluble viscosity reducer displacement in test well group was established to optimize the development technical parameter of water-soluble viscosity reducer. The results show that compared with waterflooding, the oil displacement efficiency of water-soluble viscosity reducer is increased by 12.7%; water-soluble viscosity reducer can effectively reduce the viscosity of extra heavy oil, under the same temperature and permeability, the higher the concentration of viscosity reducer, the better the viscosity reduction effect, and the smaller the pressure gradient required at the same injection rate; the main mechanism of water-soluble viscosity reducer for enhancing oil recovery is to form oil in water emulsion, which can reduce the viscosity and interfacial tension of crude oil and reduce the residual oil saturation; in the pilot well group, the optimized injection concentration of water-soluble viscosity reducer is 3%, and the optimal injection amount of water-soluble viscosity reducer solution is 50 t/d; water-soluble viscosity reducer displacement was implemented in the pilot well group, the average daily oil of well group was increased from 1.8 t/d to 7.34 t/d, and the pilot well group has achieved good development performance.

scholarly journals Influence of the Interfacial Properties on the Stability of Water in Heavy Oil Emulsions in Thermal Recovery Process

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yongtao Sun ◽  
Zhaomin Li
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Interfacial Properties ◽  
Thermal Recovery ◽  
Oil Reservoir ◽  
Stirring Rate ◽  
Heavy Oil Reservoir ◽  
The Stability ◽  
Increasing Temperature ◽  
Stability Of Water

Under the conditions of thermal oil recovery, the heavy oil in a reservoir usually exists in the form of W/O emulsion with high water content, which has significant effect on oil recovery performance. The most important parameter on the stability of W/O emulsion is interfacial properties. Thus, in order to investigate the effect of interfacial properties on the stability of W/O emulsion in a heavy oil reservoir at elevated temperatures, experiments have been conducted to generate various emulsions with variations in the temperature; stirring rate; contents of asphaltene, resin, and wax of the simulated heavy oil; and water salinity based on a target heavy oil reservoir in China. Then, the properties of the W/O emulsions include viscosity, interfacial viscosity (IFV), interfacial tension (IFT), and dehydration rate; the microscopic morphologies are measured as well. The experimental results show evidently stable W/O emulsion of heavy oil and water generated in thermal processes due to the stable, thick, and indistinct interface between heavy oil and water, where the active molecules of asphaltene and resin are accumulated. The interface connects the central large droplet and the surrounding small droplets tightly. The results also indicate the size of the central droplet, and the indistinct interface can be enlarged with increasing temperature and increasing stirring rate. Compared to resin, it is noted that the larger asphaltene molecules have stronger connection because of their stronger intermolecular force, larger IFV, and less IFT. At the same time, the stability of W/O emulsion will be strengthened with increasing temperature and stirring rate and gradually weakened with increasing salinity. In conclusion, the stability of water in heavy oil emulsion is mainly related to the large interfacial viscosity of the interface with much more heavy components such as asphaltene and resin compared to thin oil.

The Research on Main Controlling Factors of Edge Water Invasion in Heavy Oil Thermal Recovery

2013 ◽  
Vol 448-453 ◽  
pp. 4009-4014
Author(s):  
Ji Cheng Zhang ◽  
Xiao Yun Li ◽  
Jian Cheng Wei ◽  
Zi Yi Xu
Keyword(s):  
Heavy Oil ◽  
Orthogonal Experiment ◽  
Influence Factors ◽  
Steam Injection ◽  
Controlling Factors ◽  
Thermal Recovery ◽  
Production Factor ◽  
Oil Reservoir ◽  
Injection Temperature ◽  
Heavy Oil Reservoir

The Characteristics of heavy oil reservoir and the influence factors of edge water invasion are researched though the research of summary of geology in the BQ57 area. 12 factors are confirmed with the orthogonal experiment. The research contains 12 factors,among them, geologic factors contain reservoir heterogeneity, effective thickness, Crude oil properties, angle of bedding and Edge water energy[1]; Development factors contain temperature field, Steam injection intensity, Steam injection time, soak time, Steam injection temperature, Steam dryness, production factor, and it calculates the weight of various factors.

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