1. A method for accessing a target fluid in a formation of an oilfield having at least one wellbore, the method comprising:
acquiring physicochemical property information of a portion of the formation, wherein the physicochemical property information comprises a chemical potential of a pore fluid in the formation;
determining a type and a concentration of a chemical agent based on the physicochemical property information of the portion of the formation, wherein the type of the chemical agent comprises a chemical potential that is a lower chemical potential than a chemical potential of the pore fluid;
applying the chemical agent at the portion of the formation to provide a chemical action, wherein the chemical action comprises osmotic action, wherein the osmotic action extracts the pore fluid from the portion of the formation, wherein a pore pressure in the portion of the formation is reduced based on extracting the pore fluid to form a reduced pore pressure; and
applying a hydraulic pressure exceeding a threshold to form a fracture in the portion of formation, wherein the threshold is reduced based on the reduced pore pressure, wherein the fracture releases the target fluid at the portion of the formation, and wherein the target fluid is released at the portion of the formation responding to the chemical action.
2. The method of claim 1, wherein the formation comprises at least one selected from a group consisting of shale and clayey sandstone.
3. (canceled)
4. The method of claim 1, wherein the chemical agent is selected from at least one of a group consisting of super electrolyte saturated solution and formate.
5. The method of claim 4, wherein the formate is selected from at least one of a group consisting of cesium formate and sodium formate.
6. The method of claim 1, wherein the chemical agent is a Newtonian fluid.
7. The method of claim 1, wherein the physicochemical property information further comprises in situ stress and temperature.
8. The method of claim 1, wherein the determining step further comprises:
determining a temperature, a pressure, and a volume of the chemical agent.
9. (canceled)
10. The method of claim 1, further comprising:
applying a hydraulic pressure to form a fracture in the portion of the formation,
wherein the formation is hardened adjacent to the fracture to form a hardened formation based on extracting the pore fluid, and
wherein the hardened formation allows the fracture to stay open and release the target fluid at the portion of the formation.
11. The method of claim 10, further comprising:
applying a proppant into the fracture, wherein the proppant supports the fracture and prevents the fracture from closing.
12. The method of claim 10, wherein the chemical agent comprises time released capsules comprising at least one selected from a group consisting of ionic compound and formate.
13. The method of claim 1, wherein applying the chemical agent comprises injecting the chemical agent through a portion of the wellbore.
14-20. (canceled)
21. A system for accessing a target fluid in a formation of an oilfield having a wellbore intersecting a portion of the formation, comprising:
a chemical agent for providing a chemical action at the portion of the formation, wherein the chemical agent comprises time released capsules comprising at least one selected from a group consisting of ionic compound and formate;
equipment for acquiring physicochemical property information of the portion of the formation;
means for determining a type and concentration of the chemical agent based on the physicochemical property; and
means for applying the chemical agent at the portion of the formation to release the target fluid in the portion of the formation responding to the chemical action,
means for applying a hydraulic pressure to form a fracture in the portion of the formation,
wherein the formation is hardened adjacent to the fracture to form a hardened formation based on the chemical action, and
wherein the hardened formation allows the fracture to stay open and release the target fluid at the portion of the formation.
22. The system of claim 21, wherein the formation comprises at least one selected from a group consisting of shale and clayey sandstone.
23. The system of claim 21,
wherein the physicochemical property information comprises a chemical potential of a pore fluid in the formation,
wherein the type of the chemical agent comprises a chemical potential that is a lower chemical potential than a chemical potential of the pore fluid,
wherein the chemical action comprises osmotic action, and
wherein the osmotic action extracts the pore fluid from the portion of the formation.
24. The system of claim 21, wherein the chemical agent is selected from at least one of a group consisting of super electrolyte saturated solution and formate.
25. The system of claim 24, wherein the formate is selected from at least one of a group consisting of cesium formate and sodium formate.
26. The system of claim 21, wherein the chemical agent is a Newtonian fluid.
27. The system of claim 21, wherein the physicochemical property information further comprises in situ stress and temperature.
28. The system of claim 21, further comprising:
means for determining a temperature, a pressure, and a volume of the chemical agent.
29. The system of claim 21, further comprising:
means for applying a hydraulic pressure exceeding a threshold to form a fracture in the portion of the formation, wherein the threshold is reduced responding to the chemical action; and
means for obtaining the target fluid from the fracture.
30. (canceled)
31. The system of claim 21, further comprising:
means for applying a proppant into the fracture, wherein the proppant supports the fracture and prevents the fracture from closing.
32. (canceled)
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electronic device comprising:
a circuit board unit having a conductive rotation member on at least one surface of the circuit board unit, the conductive rotation member being rotatably supported by a roller axis; and
a rack for accommodating the circuit board unit, the rack having an opening that is covered by a flexible conductive member and is fit by the conductive rotation member.
2. The electronic device according to claim 1, further comprising a pushing member to push the conductive rotation member, wherein the pushing member pushes the conductive rotation member against the flexible conductive member in a state that the circuit board unit is accommodated in the rack.
3. The electronic device according to claim 1, comprising a canceling member that cancels the engagement of the conductive rotation member.
4. The electronic device according to claim 1, wherein the conductive rotation member is arranged on the upper surface of the circuit board unit.
5. The electronic device according to claim 4, wherein the conductive rotation member is further arranged on the lower surface of the circuit board unit.
6. The electronic device according to claim 1, wherein the conductive rotation member has a cylindrical shape.
7. An electronic device comprising:
a first enclosure having a conductive rotation member on at least one surface of the first enclosure, the conductive rotation member being rotatably supported by a roller axis; and
a second enclosure for accommodating the first enclosure, the second enclosure having a flexible conductive member at a position where the conductive rotation member is brought into contact with the flexible conductive member in a state that the first enclosure is accommodated in the second enclosure.
8. An electronic device comprising a circuit board unit having a conductive rotation member, rotatably supported by a roller axis, provided at one or more surfaces of the circuit board unit to electrically contact a rack that receives the circuit board unit.
9. An electronic device comprising:
a circuit board unit having a conductive rotation member on at least one surface of the circuit board unit, the conductive rotation member having a cylindrical shape and being rotatably supported by a roller axis extending along the central axis of the conductive rotation member; and
a rack for accommodating the circuit board unit, the rack having an opening that is covered by a flexible conductive member and is fit by the conductive rotation member.
10. The electronic device according to claim 9, further comprising a pushing member to push the conductive rotation member, wherein the pushing member pushes the conductive rotation member against the flexible conductive member in a state that the circuit board unit is accommodated in the rack.
11. The electronic device according to claim 9, comprising a canceling member that cancels the engagement of the conductive rotation member.
12. The electronic device according to claim 10, wherein the pushing member provides to the roller axis a biasing force along the vertical direction so as to move the conductive rotation member outside of the circuit board unit.
13. The electronic device according to claim 10, wherein the pushing member is placed between the conductive rotation member and a plate for supporting the pushing member.
14. The electronic device according to claim 11, wherein an intermediate part of the canceling member is connected to a supporting axis fixed to the circuit board unit, and an end of the canceling member is connected to the roller axis and rotated around the supporting axis.
15. The electronic device according to claim 9, wherein the opening is larger than the outer shape of the conductive rotation member.
16. The electronic device according to claim 11, wherein, when the canceling member cancels the engagement of the conductive rotation member, the conductive rotation member is stored in the circuit board unit.