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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0379759 (1989-07-14) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 265 인용 특허 : 5 |
A method to enhance steam flooding where at least two horizontal wellbores are utilized. Carbon dioxide is injected into a lower perforated horizontal wellbore. Once sufficient carbon dioxide has been injected into the formation, steam is injected through the lower horizontal wellbore. The steam dis
A method to enhance steam flooding where at least two horizontal wellbores are utilized. Carbon dioxide is injected into a lower perforated horizontal wellbore. Once sufficient carbon dioxide has been injected into the formation, steam is injected through the lower horizontal wellbore. The steam displaces the carbon dioxide into the formation where it contacts and mixes with hydrocarbonaceous fluids. Steam causes the carbon dioxide to expand, thereby providing for a better sweep of the formation. Steam injection is ceased and liquid carbon dioxide injection again is commenced. Afterwards, steam is injected again into the formation. This sequence is continued until it becomes uneconomical to produce hydrocarbonaceous fluids from an upper horizontal wellbore. Hydrocarbon displacement efficiencies are enhanced when hydrocarbons are produced into the upper horizontal wellbore due to viscosity and density differences.
A method for recovering hydrocarbonaceous fluids from a formation penetrated by at least two horizontal wells comprising: (a) injecting liquid carbon dioxide through at least one lower horizontal well into said formation at a pressure insufficient to fracture said formation; (b) thereafter injecting
A method for recovering hydrocarbonaceous fluids from a formation penetrated by at least two horizontal wells comprising: (a) injecting liquid carbon dioxide through at least one lower horizontal well into said formation at a pressure insufficient to fracture said formation; (b) thereafter injecting steam into said lower horizontal well, thereby causing said liquid carbon dioxide to convert to its gaseous state and expand thereby making a substantially better sweep of the formation; (c) recovering hydrocarbonaceous fluids, gaseous carbon dioxide, steam and water from said formation via at least one upper horizontal well; and (d) repeating steps (a), (b) and (c).
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