Method and system for producing fluids from low permeability formations
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United States of America Patent
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Nov 7, 2000
Grant Date -
N/A
app pub date -
Sep 16, 1998
filing date -
Sep 16, 1998
priority date (Note) -
Expired
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Abstract
A method and system for producing hydrocarbons from a low permeability formation through a well wherein the formation is first fractured with steam. The pressure of the produced fluids is measured at timed intervals and signals representative of these measurements are inputted into a computer which, in turn, calculates the rate of change in the pressure and compares this rate to a preferred limit of rate change. When the limit is exceeded, the computer outputs a signal to adjust a control value in the production line to keep the rate of pressure decrease within the preferred limit. When production drops below a certain level, the control valve is fully opened to 'bump' the well and allow the pressure to increase to a new maximum. This new maximum pressure is then used to set a new preferred limit of pressure rate change.
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