(US20200230554) Method of Controlling Salinity of a Low Salinity Injection Water 机翻标题: 暂无翻译,请尝试点击翻译按钮。

源语言标题
(US20200230554) Method of Controlling Salinity of a Low Salinity Injection Water
公开号/公开日
US20200230554 / 2020-07-23
申请号/申请日
US16/645,426 / 2018-09-12
发明人
COLLINS IAN RALPHCOUVES JOHN WILLIAMCROUCH JOHN HENRYWILLIAMS JOHN DALE;
申请人
BP;
主分类号
IPC分类号
B01D-061/02 B01D-061/08 B01F-003/08 B01F-015/04 C02F-001/44 C02F-001/68 C09K-008/58 E21B-043/20
摘要
(US20200230554) A method includes producing a first blended low salinity injection water for injection into at least one injection well that penetrates a first region of an oil-bearing reservoir and producing a second blended low salinity injection water for injection into at least one injection well that penetrates a second region of an oil-bearing reservoir. The reservoir rock of the first and second regions has first and second rock compositions, respectively, that present different risks of formation damage. The first and second blended low salinity injection waters comprise variable amounts of nanofiltration permeate and reverse osmosis permeate. The compositions of the first and second blended low salinity injection waters are maintained within first and second predetermined operating envelopes, respectively, that balance improving enhanced oil recovery from the first and second regions while reducing formation damage upon injecting the first and second blended low salinity injection waters into the oil-bearing reservoir.
机翻摘要
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地址
代理人
代理机构
;
优先权号
2017GB-0014649 2018WO-EP74669
主权利要求
(US20200230554) 1. A method comprising:   producing a first blended low salinity injection water for injection into at least one injection well penetrating a first region of an oil-bearing reservoir;   producing a second blended low salinity injection water for injection into at least one injection well penetrating a second region of the oil-bearing reservoir,   wherein the first region and the second region have a first rock composition and a second rock composition, respectively,   wherein the first rock composition and the second rock composition have different risks of formation damage when exposed to a low salinity injection water, and   wherein the first blended low salinity injection water and the second blended low salinity injection water each comprise variable amounts of nanofiltration permeate and reverse osmosis permeate,   maintaining a composition of the first blended low salinity injection water within a first predetermined operating envelope; and   maintaining a composition of the second blended low salinity injection water within a second predetermined operating envelope,   wherein the first predetermined operating envelope and the second predetermined operating envelope improve an enhanced oil recovery from the first region and the second region and reduce formation damage upon injection of the first blended low salinity injection water into the first region and injection of the second blended low salinity injection water into the second region. 2. The method of claim 1, wherein the first blended low salinity injection water and the second blended low salinity injection water each further comprise variable amounts of seawater. 3. The method of claim 1, wherein the first blended low salinity injection water and the second blended low salinity injection water each further comprise variable amounts of a fines stabilizing additive. 4. The method of claim 1, further comprising:   injecting the first blended low salinity injection water into the at least one injection well penetrating the first region of the oil-bearing reservoir;   injecting the second blended low salinity injection water into the at least one injection well penetrating the second region of the oil-bearing reservoir contemporaneously. 5. The method of claim 1, further comprising:   injecting the first blended low salinity injection water into the at least one injection well penetrating the first region of the oil-bearing reservoir;   injecting the second blended low salinity injection water into the at least one injection well penetrating the second region of the oil-bearing reservoir, wherein the first blended low salinity injection water is injected prior to the injection of the second blended low salinity injection water. 6. The method of claim 1, wherein the oil-bearing reservoir further comprises a third region of the reservoir, wherein the third region of the oil-bearing reservoir has a different risk of formation damage when exposed to a low salinity injection water than the first region and the second region, wherein the method further comprises:   producing a third blended low salinity injection water for injection into the at least one injection well that penetrates the third region of the oil-bearing reservoir; and   injecting the third blended low salinity injection water into the at least one injection well penetrating the third region of the oil-bearing reservoir,   maintaining a composition of the third blended low salinity injection water within a third predetermined operating envelope,   wherein the third predetermined operating envelope improves an enhanced oil recovery from the third region and reduces formation damage upon injection of the third blended low salinity injection water. 7. The method of claim 6, wherein the first blended low salinity injection water, the second blended low salinity injection water, and the third low salinity injection water are injected into the at least one injection well simultaneously. 8. The method of claim 6, wherein the first blended low salinity injection water, the second blended low salinity injection water, and the third low salinity injection water are injected into the at least one injection well sequentially. 9. The method of claim 6, wherein at least one of the first predetermined operating envelope, the second predetermined operating envelope, or the third predetermined operating envelope defines a sulfate level of less than 100 mg/L. 10. The method of claim 1, wherein the first predetermined operating envelope and the second predetermined operating envelope comprise one or more boundary values for the composition of the first blended low salinity injection water and the composition of the second blended low salinity injection water, respectively, wherein the one or more boundary values comprise at least one of an upper limit or a lower limit for parameters comprising at least one of: a total dissolved solids content, a salinity, an ionic strength, a concentration of one or more individual ions, the concentrations of one or more types of individual ions, a ratio of a type of individual ion, a ratio of an individual ion, or any combination thereof. 11. A method comprising:   determining an overriding operating envelope for a single blended low salinity injection water, wherein the operating envelope defines boundary values for a region of overlap for a plurality of predetermined operating envelopes for compositions of the blended low salinity injection waters for a first region and a second region of an oil-bearing reservoir, wherein the plurality of predetermined operating envelopes improve enhanced oil recovery from the first region and the second region of the oil-bearing reservoir while reducing formation damage in the first region and the second region,   wherein at least one injection well penetrates the first region, and at least one injection well penetrates the second region,   wherein a reservoir rock of the first region has a first rock composition, wherein a reservoir rock of the second region has a second rock composition, wherein the first rock composition and the second rock composition have different risks of formation damage when exposed to the compositions of the blended low salinity injection waters, and wherein the single blended low salinity injection water comprises variable amounts of nanofiltration permeate and reverse osmosis permeate;   producing the single injection fluid having a composition within the overriding operating envelope;   maintaining the composition of the single injection fluid within the overriding operating envelope. 12. The method of claim 11, further comprising:   injecting the single injection fluid into the first region and into the second region. 13. The method of claim 11, wherein the first region and the second region are different regions or layers of reservoir rock within the oil-bearing reservoir. 14. The method of claim 11, wherein the first rock composition and the second rock composition are different. 15. The method of claim 11, wherein the boundary values of the single blended low salinity injection water comprise at least one of an upper limit or a lower limit for parameters comprising at least one of: a total dissolved solids content, a salinity, an ionic strength, a concentration of one or more individual ions, the concentrations of one or more types of individual ions, a ratio of a type of individual ion, a ratio of an individual ion, or any combination thereof. 16. A system for injecting a single blended low salinity injection water of variable composition into at least one injection well penetrating a first region of an oil-bearing reservoir and injecting the single blended low salinity injection water into at least one injection well penetrating a second region of the oil-bearing reservoir, the system comprising:   a desalination plant, wherein the desalination plant comprises:    a Reverse Osmosis (RO) array configured to produce an RO permeate blending stream and deliver the RO permeate blending stream to a blending system; and    a Nano-Filtration (NF) array configured to produce an NF permeate blending stream and deliver the NF permeate blending stream to the blending system;   a blending system, wherein the blending system comprises:    an RO permeate feed line,    an NF permeate feed line,    an RO permeate dump line,    an NF permeate dump line,    a blending point configured to blend the RO permeate and the NF permeate to form the single blended low salinity injection water, and    a discharge line configured to deliver the single blended low salinity injection water to the injection system; and   an injection system, wherein the injection system comprises:    an injection line having at least one injection pump configured to deliver the single blended injection water to: 1) the at least one injection well penetrating the first region of the oil-bearing reservoir, and 2) the at least one injection well penetrating the second region of the oil-bearing reservoir,   a control unit, wherein the control unit is configured to:    adjust an amount of at least one of the RO permeate blending stream or the NF permeate blending stream that are blended at the blending point; and    maintain the composition of the single blended low salinity water stream within an overriding operating envelope defined by boundary values for a region of overlap of a first predetermined operating envelope and a second predetermined operating envelope, wherein the first predetermined operating envelope and the second predetermined operating envelope define compositions of the single blended low salinity injection water for the first region and the second region of the oil-bearing reservoir. 17. The system of claim 16, wherein the first predetermined operating envelope and the second predetermined operating envelope define compositions that improve oil recovery from the first region and the second region and reduce formation damage in the first region and the second region. 18. The system of claim 16, wherein the first predetermined operating envelope and the second predetermined operating envelope are stored in the control unit, and wherein the control unit is further configured to determine the overriding operating envelope using the first predetermined operating envelope and the second predetermined operating envelope. 19. The system of claim 16, wherein the blending system comprises:   a tank comprising a concentrated aqueous solution of at least one fines stabilizing additive, and   a fines stabilizing concentrate feed line, wherein the blending system is configured to deliver variable amounts of the at least one fines stabilizing additive to the single blended low salinity injection water through the fines stabilizing concentrate feed line. 20. The system of claim 19, wherein the blending system further comprises a metering pump configured to dose the at least one fines stabilizing concentrate into the single blended low salinity injection water. 21. The system of claim 20, wherein the metering pump is in signal communication with a flow rate meter, wherein the metering pump is configured to adjust a concentration of the at least one fines stabilizing additive in the single blended low salinity injection water to match a concentration profile for the at least one fines stabilizing additive using a signal from the flow rate meter. 22. The system of any of claim 19, wherein the control unit is further configured to:   adjust the amount of the at least one fines stabilizing additive delivered to at least one of: 1) the blending point of the blending system, or 2) the injection line; and   maintain the composition of the single blended low salinity water within the overriding operating envelope based on the adjustment of the amount of the at least one fines stabilizing additive. 23. The system of claim 16, wherein the overriding operating envelope comprises upper limits and lower limits for a concentration of the at least one fines stabilizing additive, wherein the upper limits and lower limits correspond to overlapping concentrations of the at least one fines stabilizing additive common to both the first and second predetermined operating envelopes. 24. The system of claim 16, wherein the desalination plant is located at an onshore location and the blending system is located at an offshore location. 25. The system of claim 16, wherein the injection system further comprises:   a plurality of branch injection lines coupled to a single subsea manifold, wherein the injection line is connected to the single subsea manifold, and wherein the plurality of branch injection lines couple the single subsea manifold to the at least one injection well penetrating the first region of an oil-bearing reservoir and the at least one injection well penetrating the second region of the oil-bearing reservoir. 26. The system of claim 25, wherein the control unit is further configured to:   open valves in the injection line and the single subsea manifold;   deliver the single blended low salinity water stream from the injection line to the at least one injection well penetrating the first region and the at least one injection well penetrating the second region in response to the opening of the valves. 27. The system of claim 25, wherein the control unit is further configured to:   selectively open valves in the injection line and the single subsea manifold;   deliver the single blended low salinity water stream from the injection line to the at least one injection well penetrating the first region in response to the opening of the valves;   selectively change the valves in the injection line and the single subsea manifold after delivering the single blended low salinity water stream from the injection line to the at least one injection well penetrating the first region; and   deliver the single blended low salinity water stream from the injection line to the at least one injection well penetrating the second region in response to selectively changing of the valves. 28. The system of claim 16, wherein the blending system further comprises: one or more sensors configured to determine a composition parameter of the single blended low salinity injection water stream. 29. The system of claim 28, wherein the composition parameter comprises: a total dissolved solids concentration, a chloride anion concentration, a bromide anion concentration, a calcium cation concentration, a magnesium cation concentration, a potassium cation concentration, a nitrate anion concentration, a sulfate anion concentration, or a flow rate of one or more of: the RO permeate blending stream, the RO permeate dump stream, the NF permeate blending stream, or the NF permeate dump stream. 30. A system for producing a first blended low salinity injection water and a second blended low salinity injection water of variable composition for injection into at least one injection well that penetrates a first region of an oil-bearing reservoir and at least one injection well that penetrates a second region of the oil-bearing reservoir, wherein a reservoir rock of the first region has a first rock composition, wherein a reservoir rock of the second region has a second rock composition, wherein the first rock composition and the second rock have different risks of formation damage, wherein the first blended low salinity injection water and the second blended low salinity water each comprise variable amounts of nanofiltration permeate and reverse osmosis permeate, wherein the system comprises:   a desalination plant, wherein the desalination plant comprises:    a Reverse Osmosis (RO) array configured to produce an RO permeate blending stream and deliver the RO permeate blending stream to a blending system, and    a Nano-Filtration (NF) array configured to produce an NF permeate blending stream and deliver the NF permeate blending stream to the blending system;   the blending system, wherein the blending system comprises:    a main RO permeate feed line,    a main NF permeate feed line,    an RO permeate dump line,    an NF permeate dump line,    a first blending point and a second blending point, and    a first discharge line and a second discharge line, wherein the RO permeate dump line and the NF permeate dump lines are in fluid communication with the main RO permeate feed line, wherein the main RO permeate feed line is divided to form a first branch RO permeate line and a second branch RO permeate feed line configured to deliver the RO permeate blending stream to the first blending point and the second blending point, respectively, wherein the main NF permeate feed line is divided to form a first branch NF permeate feed line and a second branch NF permeate feed line configured to deliver the NF permeate blending stream to the first blending point and the second blending point, respectively, where the first discharge line and the second discharge line are in fluid communication with the first blending point and the second blending point, and where the first discharge line and the second discharge line are configured to deliver the first blended low salinity injection water and the second blended low salinity injection water to an injection system;    the injection system, wherein the injection system comprises: at least a first dedicated injection line and a second dedicated injection line, each having at least one injection pump, wherein the first dedicated injection line and the second dedicated injection line are in fluid communication with the first discharge line and the second discharge line of the blending system, respectively, wherein the first dedicated injection line is configured to deliver the first blended low salinity injection water to the at least one injection well that penetrates the first region of an oil-bearing reservoir, and wherein the second injection line is configured to deliver the second blended low salinity injection water to the at least one injection well that penetrate the second region of the oil-bearing reservoir; and   a control unit, wherein the control unit is configured to:    receive a first predetermined operating envelope and a second predetermined operating envelope;    change an operation of the desalination plant to adjust the amount of at least one of the RO permeate blending stream or the NF permeate blending stream that are blended at the first blending point and second blending point; and    maintain compositions of the first blended low salinity water stream and the second blended low salinity water stream within the first predetermined operating envelope and the second predetermined operating envelope, respectively, based on the change to the operation of the desalination plant. 31. The system of claim 30, wherein at least one of the first blended low salinity injection water or the second blended low salinity injection water comprises seawater or at least one fines stabilizing additive. 32. The system of claim 30 or 31, wherein the control unit is further configured to: inject the first blended low salinity injection water and the second blended low salinity injection water sequentially. 33. The system of claim 30, wherein the control unit is further configured to: inject the first blended low salinity injection water and the second blended low salinity injection water simultaneously. 34. The system of claim 30, wherein the blending system further comprises:   a tank comprising a concentrated aqueous solution of at least one fines stabilizing additive;   a main feed line coupled to the tank;   a first branch feed line and a second branch feed line, wherein each of the first branch feed line and the second branch feed line having a flow control valve configured to deliver variable amounts of the at least one fines stabilizing additive as a blending stream for the first blended low salinity injection water and the second blended low salinity injection water. 35. The system of claim 34, wherein the control unit is further configured to:   change an operation of the blending system to adjust the amount of the at least one fines stabilizing additive delivered as a blending stream for the first blended low salinity injection water and the second blended low salinity injection water;   maintain the compositions of the first blended low salinity injection water stream and the second blended low salinity injection water stream within the first predetermined operating envelope and the second predetermined operating envelope that include boundary values for at least one fines stabilizing additive. 36. The system of claim 30, wherein the blending system further comprises: one or more sensors configured to determine a composition parameter of the first blended low salinity injection water stream and the second blended low salinity injection water stream. 37. The system of claim 36, wherein the one or more sensors are configured to measure one or more parameter comprising: a total dissolved solids concentration, a chloride anion concentration, a bromide anion concentration, a calcium cation concentration, a magnesium cation concentration, a potassium cation concentration, a nitrate anion concentration, a sulfate anion concentration, or a flow rate of one or more of: the RO permeate blending stream, the RO permeate dump stream, the NF permeate blending stream, or the NF permeate dump stream.
法律状态
PENDING
专利类型码
A1
国别省市代码
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