Layer | Fill | Outline |
---|
Map layers
Theme | Visible | Selectable | Appearance | Zoom Range (now: 0) |
---|
Fill | Stroke |
---|---|
Collaborating Authors
EOR of Superheated Steam Injection in Shallow Heavy Oil Reservoir: A Case Study
Wu, Yongbin (RIPED, PetroChina Company Limited) | Ma, Desheng (RIPED, PetroChina Company Limited) | Liu, Shangqi (RIPED, PetroChina Company Limited) | Wang, Hongzhuang (RIPED, PetroChina Company Limited) | Zhao, Xin (Daqing Oil Field, PetroChina Company Limited)
Abstract This paper demonstrates a case study of the superheated steam injection methodology studied and utilized in the North Кенкияк oil field. The methodology is studied from its mechanisms of enhanced oil recovery by approaches of reservoir engineering, in-house experiment and numerical simulation, which indicate that by injecting the superheated steam, the advantages of rock wettability conversion, more heat enthalpy, larger specific volume and latent heat of vaporization of superheated steam would result in the better production and economic performance. Pilot test wells reinforced the study and the field application is planed and optimized.
- North America (0.94)
- Asia > China (0.69)
- Asia > China > Heilongjiang > Songliao Basin > Daqing Field > Yian Formation (0.99)
- Asia > China > Heilongjiang > Songliao Basin > Daqing Field > Mingshui Formation (0.99)
Abstract Multistage hydraulic fracturing of horizontal wells enables creation of a Stimulated Reservoir Volume (SRV). An idealization of the SRV for shale gas production is a rectangle of length equal to horizontal well length and width equal to twice the half length of the created hydraulic fractures. This paper discusses the use of an analogous SRV design for two novel thermal applications. The first application considers using the SRV of a shale gas well, after the gas production rate drops below the economic limit, for low grade geothermal heat extraction. Cold water is pumped into the fracture network through one horizontal well drilled at the fracture tips. The water is heated by contact with the hot rock, and then recovered through a second horizontal well drilled at the other end of the fracture network. The basis of this concept is to use the already created stimulated reservoir volume for heat transfer purposes. Technical and economic feasibility of applying this technique to Haynesville Shale are evaluated. The second application considers using a similarly created SRV for producing oil from oil shale. Thermal decomposition of kerogen to oil and gas requires heating the oil shale to 700°F. We propose to inject high quality saturated steam generated using a small scale nuclear plant for heating the formation to the necessary temperature. Using the same flow geometry as in the previous case, produced water would be reheated and reinjected in a closed cycle. The energy required for steam heating is compared to other approaches in the literature. Analytical and numerical models are developed to evaluate the number, dimensions, and spacing of fractures sufficient to achieve heat transfer in a reasonable length of time for each of these applications.
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (1.00)
- Geology > Petroleum Play Type > Unconventional Play > Shale Play (0.91)
- Energy > Oil & Gas > Upstream (1.00)
- Energy > Power Industry > Utilities > Nuclear (0.66)
- Energy > Renewable > Geothermal > Geothermal Resource (0.46)
- North America > United States > Texas > Haynesville Shale Formation (0.99)
- North America > United States > Texas > Fort Worth Basin > Barnett Shale Formation (0.99)
- North America > United States > Texas > East Texas Salt Basin > Cotton Valley Group Formation > Bossier Shale Formation (0.99)
- (3 more...)
Development and Application of a Modified Superheated Steam Flooding Assisted by N2 Foam and High-Temperature Resistant Gel
Anzhu, Aut Xu (RIPED, Petrochina) | Longxin, Mu (RIPED, Petrochina) | bing, Bo (RIPED, Petrochina) | fachao, Shan (RIPED, Petrochina) | Xingbo, Li (China National Oil&gas Development Corporation)
Abstract Superheated steam has a smaller density and a larger specific volume than conventional saturated steam, and has a stronger override effect in heavy oil reservoir. As most of heavy oil reservoirs have strong heterogeneity because of high porosity and permeability. Therefore, the steam injection profiles vary greatly and vertical producing degree of reservoirs is very low. Nitrogen with a large compression coefficient, large volume coefficient, large expansion volume capacity, can feed the formation energy and acceleratively drive heavy oil efficiently. For another, the surfactant in the foam can reduce the oil-water mobility ratio. High temperature-resistant gel can seal steam breakthrough channel due to its high permeability. Nitrogen foam and gel flooding can increase the superheated steam swept volume, improve the effect of superheated steam flooding in heavy oil thermal recovery. The injection parameters of nitrogen foam and high-temperature resistant gel were systematically studied by numerical simulation combined with physical simulation method in this paper. Gel, foaming agent, nitrogen injection sequence and injection method determined the improvement degree of steam injection profile modification. The results showed that under the injection rate of foaming agent was 240m/d, the daily injection of nitrogen was 2000m/d, the total injection amount of foaming agent was 16,000m in early slug injection, the effect of thermal recovery was the best. Application of this technology in KMK heavy oil field can enhance heat insulation effect of wellbore, decreased thermal lost by 15.5%, modified superheated steam injection profile by 36.3%, increased vertical producing degree of the reservoirs to 65.8%, feed formation energy in high efficiency. The superheated steam injection profile modification method by N2 foam and gel shows great economic prospect as a way of plugging steam breakthrough channel, controlling steam override and enhancing heavy oil recovery.
- North America > United States (0.68)
- Asia > China (0.50)
- Asia > Middle East (0.46)
- North America > Canada > Alberta (0.16)
- North America > United States > Missouri > Bellamy Field (0.99)
- Asia > Middle East > Kuwait > Jahra Governorate > Arabian Basin > Widyan Basin > North Kuwait Jurassic (NKJ) Fields > Marrat Formation > Upper Marrat Formation (0.98)
- Asia > Middle East > Kuwait > Jahra Governorate > Arabian Basin > Widyan Basin > North Kuwait Jurassic (NKJ) Fields > Marrat Formation > Sargelu Formation (0.98)
- North America > United States > Louisiana > China Field (0.96)
The Potential Evaluation of Superheated Steam with High Degree Assisted Gravity Drainage Process in Oil Sands Project
Liang, Guangyue (Research Institute of Petroleum Exploration and Development, CNPC) | Liu, Shangqi (Research Institute of Petroleum Exploration and Development, CNPC) | Liu, Yang (Research Institute of Petroleum Exploration and Development, CNPC) | Luo, Yanyan (Research Institute of Petroleum Exploration and Development, CNPC) | Han, Bin (Research Institute of Petroleum Exploration and Development, CNPC) | Huang, Jixin (Research Institute of Petroleum Exploration and Development, CNPC)
Abstract Compared with conventional wet saturated steam, both enthalpy and specific volume of superheated steam are much larger. Combination superheated steam as injected media with SAGD process is expected to improve development effect of oil sands with less steam consumption. In this paper, SAGD performance in certain oil sands project considering aquathermolysis reactions mechanism was evaluated and compared by physical simulation, theoretical analysis and numerical simulation for superheated steam and wet saturated steam. Superheated steam enhances oil recovery a little under the same heat, but can significantly reduce steam injection rate. This is because superheated steam injected mainly concentrates on small region in the bottom of steam chamber, and doesn't expand to the drainage boundary of the whole steam chamber, under the action of subcool control. The optimum bottom-hole temperature of superheated steam is about 350°C considering the heat loss along vertical well section, SAGD performance and facilitating subcool control in field operation. In order to further improve oil rate and recovery factor, the technology gravity drainage assisted in superheated steam flooding during late SAGD process as well as superheated steam-assisted gravity drainage process with mixed solvent were proposed and evaluated. The former can increase swept volume of bypassed bitumen with wedge-shape between adjacent well pairs, but consume more steam. Whereas, the latter can attain higher recovery factor, solvent recovery, and incremental bitumen to solvent loss ratio compared with wet saturated steam. Superheated steam with high degree assisted gravity drainage process wasn't applied in oil sands project, and aquathermolysis reactions were considered for the first time by combining physical simulation, theoretical analysis and numerical simulation. These insights of two technologies proposed probably improve the economics of oil sands project by increasing oil rate and decreasing steam injection rate at the same time, especially in low-price environment.
- Asia (0.94)
- North America > Canada > Alberta (0.29)
- Energy > Oil & Gas > Upstream (1.00)
- Materials > Chemicals > Commodity Chemicals > Petrochemicals (0.78)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Oil sand, oil shale, bitumen (1.00)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery > Thermal methods (1.00)
- Facilities Design, Construction and Operation > Unconventional Production Facilities > Oil sand/shale/bitumen (1.00)
New Findings on Heatloss of Superheated Steam Transmitted Along the Wellbore and Heating Enhancement in Heavy Oil Reservoirs
An Zhu, Xu (PetroChina Exploration and Production Co.) | Longxin, Mu (Research Inst. of Petroleum Exploration and Development, PetroChina) | Zifei, Fan (Research Inst. of Petroleum Exploration and Development, PetroChina) | Lun, Zhao (Research Inst. of Petroleum Exploration and Development, PetroChina)
Abstract At the conclusion of several cycles conventional saturated steam huff and puff in heavy oil reservoirs, the heating radius are typically only 20–30m as it went through successive saturated steam huff and puff. The heating scope can't be enlarged by continuing saturated steam huff and puff any more. However, superheated steam huff and puff as a additional heavy oil recovery significantly increased heating radius of saturated steam huff and puff. Conventional saturated steam huff and puff theory is not applicable for superheated steam. In this study, superheat steam heat transmission mathematical models was established by three laws such as the law of conservation of mass, the theorem of momentum and the law of conservation of energy, thermodynamics and fluid flow theories. Based on models, the parameters such as temperature, dryness, pressure, degree of superheat, heat loss along the wellbore were calculated. This work analysis the superior properties of superheated steam and bring forward superiority of superheated steam huff and puff to effectively develop heavy oil reservoirs in recovery mechanisms, including simulation studies, and current pilot test effects.
- Asia > Kazakhstan > Aktobe Oblast > Precaspian Basin > Enbeksk-Zharamysskaya Uplift Zone > Kenkiyak Field (0.99)
- Asia > China > East China Sea > Bohai Basin > Jiyang Basin > Gudao Field > Guantao Formation (0.99)