Thermal Recovery Effect Evaluation of Cyclic Steam Stimulation in Offshore Heavy Oilfield

2021 ◽  
pp. 327-333
Author(s):  
Wei Zheng ◽  
Xianhong Tan ◽  
Taichao Wang ◽  
Yuting Bai
Keyword(s):  
Thermal Recovery ◽  
Effect Evaluation ◽  
Recovery Effect ◽  
Cyclic Steam Stimulation ◽  
Steam Stimulation

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.

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.

A Dual-Directional Flow Control Device for Cyclic Steam Stimulation Applications

2021 ◽  
pp. 1-8
Author(s):  
Da Zhu
Keyword(s):  
Flow Control ◽  
Control Device ◽  
Thermal Recovery ◽  
Asia Pacific ◽  
Steam Quality ◽  
Recovery Method ◽  
Directional Flow ◽  
Cyclic Steam Stimulation ◽  
Flow Control Device ◽  
Steam Stimulation

Summary Cyclic steam stimulation (CSS) is one the most effective thermal recovery methods. It is widely used as the primary thermal recovery method to recover heavy oil fields in the Middle East, the Asia-Pacific region, and North and South America. In this paper, a novel dual-directional flow control device (FCD) will be introduced. This FCD technology can allocate accurate steam outflow into the reservoir formation and improve steam quality during the steam injection period and can mitigate steam breakthrough from the neighboring wells during the production period. In the first section, we give a brief introduction on CSS and the main issues encountered in the field operation. A multidirectional flow control nozzle specifically designed for CSS application will be presented. Design philosophy in thermodynamics and hydrodynamics of the nozzle will be discussed in detail. Field performance results, computational fluid dynamics (CFD), and flow loop testing data will be shown to evaluate the performance of the technology. The application of the technology in steam-assisted thermal applications will be introduced. Well-known issues such as erosion and scaling on the FCD tools will be studied in the end.

First Attempt of Injection-Production Integrated Technology for Steam Stimulation in Bohai Bay, China

2021 ◽  
Author(s):  
Jianhua Bai ◽  
Fahao Yu ◽  
Zhaoping Jiang ◽  
Yue Li ◽  
Baobing Shang ◽  
...  
Keyword(s):  
Technological Process ◽  
New Technology ◽  
Oil Production ◽  
Steam Injection ◽  
Thermal Recovery ◽  
Bohai Bay ◽  
Recovery Effect ◽  
Integrated Technology ◽  
Process System ◽  
Steam Stimulation

Abstract There is abundant heavy oil resource in Bohai Oilfield and steam stimulation has proven an effective method through several field pilots. Till now, all steam stimulation is conducted by two-trips string for steam injection and oil production individually. That is, when the process of steam injection, soaking and blowout is finished, an oil production string will replace the downhole string through workover operation. According to statistics, the operating charge in one huff-and-puff cycle is more than 2.5 million Yuan. Besides, workover operation takes more than 26 days and results in about 1000 m3 kill fluid leak, which greatly reduce the thermal recovery effect. Considering the drawbacks of two-trips string technology, a new injection-production integrated technology by jet pump, namely single-trip string realizing steam injection and oil production, is developed, which includes downhole string system and surface technological process system. The downhole string provides passages for steam injection and oil production. The temperature and pressure resistance of string system could reach as high as 350°C and 35MPa, respectively, which can adapt to the high temperature environment during steam injecting. The surface technological process system can separate 279m3/d producing fluid and supercharge the power fluid as high as 25MPa, which meet the needs of thermal well production. The new technology tested in X well. More than 6000 m3 steam with 356°C temperature and 16MPa pressure was injected. The downhole string system and Christmas tree withstood the HTHP test and kept in good condition. During oil production, the surface technological process ran run steadily. The pressure of plunger pump was up to 20MPa and more than 120m3 produced fluids were separated by the separator. Compared with two-trips string technology, the new technology saved 2 million Yuan and 21 operating days. Besides, no kill fluid leaked, which improves thermal recovery effect. This is the first time that injection-production integrated technology for steam stimulation is developed and put into field trial. The favorable application result indicates that this technology will promote the high-efficient exploitation of heavy oil in Bohai Bay.

A Dual-Directional Flow Control Device for Cyclic Steam Stimulation CSS Applications

2021 ◽  
Author(s):  
Da Zhu
Keyword(s):  
Flow Control ◽  
Control Device ◽  
Thermal Recovery ◽  
Asia Pacific ◽  
Steam Quality ◽  
Recovery Method ◽  
Directional Flow ◽  
Cyclic Steam Stimulation ◽  
Flow Control Device ◽  
Steam Stimulation

Abstract Cyclic steam stimulation (CSS) is one the most effective thermal recovery methods. It is widely used as the primary thermal recovery method to recovery heavy oil fields in Middle East, Asia Pacific, North and South America. In this paper, a novel dual-directional flow control device (FCD) will be introduced. This FCD technology can allocate accurate steam outflow into the reservoir formation and improve steam quality during steam injection period and can mitigate steam breakthrough from the neighboring wells during production period. In the first section, we will give a brief introduction on CSS and the main issues encountered in the field operation. A multi-directional flow control nozzle specifically designed for CSS application will be presented. Design philosophy in thermodynamics and hydrodynamics of the nozzle will be discussed in detail. Field performance results, Computational Fluid Dynamics (CFD) and flow loop testing data will be shown to evaluate the performance of the technology. The application of the technology in steam assisted thermal applications will be introduced. Well-known issues such as erosion and scaling on the FCD tools will be studied in the end.

Application of Cyclic Steam Stimulation on XYZ Formation in Sultanate of Oman

2016 ◽  
Author(s):  
Mohammed Al Raqmi ◽  
Hassan Al Saadi ◽  
Muhammad Mirza ◽  
Shihab Said Al Bahlouli ◽  
M. Aidil Arham ◽  
...  
Keyword(s):  
Sultanate Of Oman ◽  
Cyclic Steam Stimulation ◽  
Steam Stimulation

Industrial Application of Nickel Tallate Catalyst During Cyclic Steam Stimulation in Boca De Jaruco Reservoir

2021 ◽  
Author(s):  
Alexey V. Vakhin ◽  
Irek I. Mukhamatdinov ◽  
Firdavs A. Aliev ◽  
Dmitriy F. Feoktistov ◽  
Sergey A. Sitnov ◽  
...  
Keyword(s):  
Crude Oil ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Industrial Application ◽  
Laboratory Scale ◽  
Catalyst Precursor ◽  
Hydrothermal Conditions ◽  
Cyclic Steam Stimulation ◽  
Steam Stimulation

Abstract A nickel-based catalyst precursor has been synthesized for in-situ upgrading of heavy crude oil that is capable of increasing the efficiency of steam stimulation techniques. The precursor activation occurs due to the decomposition of nickel tallate under hydrothermal conditions. The aim of this study is to analyze the efficiency of in-situ catalytic upgrading of heavy oil from laboratory scale experiments to the field-scale implementation in Boca de Jaruco reservoir. The proposed catalytic composition for in-reservoir chemical transformation of heavy oil and natural bitumen is composed of oil-soluble nickel compound and organic hydrogen donor solvent. The nickel-based catalytic composition in laboratory-scale hydrothermal conditions at 300°С and 90 bars demonstrated a high performance; the content of asphaltenes was reduced from 22% to 7 wt.%. The viscosity of crude oil was also reduced by three times. The technology for industrial-scale production of catalyst precursor was designed and the first pilot batch with a mass of 12 ton was achieved. A «Cyclic steam stimulation» technology was modified in order to deliver the catalytic composition to the pay zones of Boca de Jaruco reservoir (Cuba). The active forms of catalyst precursors are nanodispersed mixed oxides and sulfides of nickel. The pilot test of catalyst injection was carried out in bituminous carbonate formation M, in Boca de Jaruco reservoir (Cuba). The application of catalytic composition provided increase in cumulative oil production and incremental oil recovery in contrast to the previous cycle (without catalyst) is 170% up to date (the effect is in progress). After injection of catalysts, more than 200 samples from production well were analyzed in laboratory. Based on the physical and chemical properties of investigated samples and considering the excellent oil recovery coefficient it is decided to expand the industrial application of catalysts in the given reservoir. The project is scheduled on the fourth quarter of 2021.

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