کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1755327 1522838 2013 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geomechanics of thermal viscous oil production in sandstones
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Geomechanics of thermal viscous oil production in sandstones
چکیده انگلیسی

Over 7 Tb of viscous oil (heavy oil, extra heavy oil, and bitumen) are trapped in sandstones or unconsolidated sand formations around the world, mainly in Canada, Venezuela, and Russia. To date, only cold flow methods and steam injection processes have achieved commercial success in accessing this immense resource. This article highlights the definitions, geology and origins, and geographical distribution of the viscous oil resources in the world, and then describes the approaches and physical mechanisms of the major commercialized viscous oil production methods being practiced around the world. Approaches to calculating thermally-induced stresses are presented, as well as discussions of thermo-mechanical issues associated with commercial thermal processes. Then, thermal, physical, and geomechanical properties of sandstone under high temperature and pressure are investigated, based on field and laboratory data. An important factor is the change in rock properties that takes place because of the large thermally-induced stresses. Finally, a practical example of thermal geomechanics effects during thermal oil production operations (example of Steam Assisted Gravity Drainage) is demonstrated, emphasizing that thermal oil production methods change reservoir rock behavior. Under elevated temperature and pressure, large changes in porosity, permeability, and compressibility occur; hence, the reservoir response evolves in time, a factor generally ignored in simulation. Whereas these geomechanical changes are largely beneficial as they tend to accelerate recovery rates, some difficult operational issues may arise, including casing shear, breach of reservoir seal, and excessive heat loss.


► Reservoir rock thermal and mechanical behavior in heavy oil reservoirs (sandstones).
► Methods and physical mechanisms of the major viscous oil production methods.
► Thermally induced stresses calculation and temperature effects on reservoir rock.
► Reservoir rock behavior during SAGD thermal oil production is described.
► Thermally induced casing shear and cap rock breaching are addressed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 103, March 2013, Pages 121–139
نویسندگان
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