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公开(公告)号：US20210040827A1
公开(公告)日：2021-02-11
申请号：US16824966
申请日：2020-03-20
Applicant: PetroChina Company Limited
Inventor： Xinglong Chen , Qingxin Song , Zhidong Yang , Shanyan Zhang , Zemin Ji , Yulong Pu
Abstract: A method and an apparatus for oil production by increasing resistance of borehole wall for improving an energy utilization rate of injection gas includes injecting gas into an oil reservoir so that a gas pressure in the oil reservoir reaches an initial oil reservoir pressure. The initial oil seepage pressure is present at a position where the inside of the production well is in communication with the oil reservoir. The initial oil seepage pressure is less than the initial oil reservoir pressure. The method also includes monitoring gas production and oil production of the production well and increasing the initial oil seepage pressure to an increased oil seepage pressure when a ratio of the gas production to the oil production is higher than a predetermined ratio. The increased oil seepage pressure is smaller than the initial oil reservoir pressure.
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2.发明授权公开(公告)号：US11428065B2
公开(公告)日：2022-08-30
申请号：US16824966
申请日：2020-03-20
Applicant: PetroChina Company Limited
Inventor： Xinglong Chen , Qingxin Song , Zhidong Yang , Shanyan Zhang , Zemin Ji , Yulong Pu
Abstract: A method and an apparatus for oil production by increasing resistance of borehole wall for improving an energy utilization rate of injection gas includes injecting gas into an oil reservoir so that a gas pressure in the oil reservoir reaches an initial oil reservoir pressure. The initial oil seepage pressure is present at a position where the inside of the production well is in communication with the oil reservoir. The initial oil seepage pressure is less than the initial oil reservoir pressure. The method also includes monitoring gas production and oil production of the production well and increasing the initial oil seepage pressure to an increased oil seepage pressure when a ratio of the gas production to the oil production is higher than a predetermined ratio. The increased oil seepage pressure is smaller than the initial oil reservoir pressure.
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