A process string for segmented water control and its operation method
A technology for process strings and completion strings, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., and can solve problems such as inability to set and seal segmented packers, and inability to hold pressure in the string
Active Publication Date: 2019-11-26
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a process string for segmental water control and its operation method, and solve the problem of segmental packers that cannot hold pressure in the string and cannot be set at the bottom. question
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[0026] The present invention will be further described below in conjunction with the accompanying drawings.
[0027] figure 1 It is a schematic diagram of the overall structure of a process string for segmented water control in the present invention, wherein the part shown on the left half represents the upper half of the process string, and the part shown on the right half represents the lower half of the process string part, the connection line between the upper half of the process string shown on the left and the lower half of the process string shown on the right represents the lower end surface of the upper half of the process string shown on the left and the lower end of the process string shown on the right The upper end face of the lower half of the process string is directly connected.
[0028] Such as figure 1 with figure 2 As shown, a process string for segmental water control includes a hands-off part, an oil bag part and a production insertion part, and the ha...
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The invention discloses a technological pipe column used for segmented water control and an operation method thereof. The technological pipe column comprises a releasing part, an oil bag part and a production inserting part. The releasing part is connected with the oil bag part through a sealing butt joint cylinder, the lower end of the oil bag part is connected with a well completion pipe column,and an oil supply pipeline of the oil bag part is connected with a segmented packer of the well completion pipe column so as to supply oil to the segmented packer. The production inserting part is inserted into the sealing butt joint cylinder after pipe column releasing and is in butt joint with the sealing butt joint cylinder. According to the technological pipe column used for segmented water control and the operation method thereof, the problem that pressure keeping cannot be conducted in the pipe column and the segmented packer of the bottom cannot be subjected to setting can be solved, the oil is supplied to the downhole packer through an oil bag so that setting and unsetting of the downhole packer can be achieved, putting-down and setting of the downhole well completion pipe columncan also be achieved through one trip, the well completion pipe column is kept in the well bottom in a releasing mode, and the produced pipe columns can be connected in a butting mode in production.
Description
technical field [0001] The invention relates to downhole production in oil and gas fields, in particular to a process pipe string for segmented water control and an operation method thereof. Background technique [0002] At present, horizontal wells are used more and more as the main development well type. However, for the South China Sea and Bohai Sea where edge and bottom water reservoirs are widely distributed, oil wells will soon enter a high water cut period during production, which will have a great impact on production. big impact. In the high water-cut development period, the remaining oil is highly dispersed, the overall production degree is low, and the difficulty of recovery is obviously increased. How to prevent or suppress the water discharge of horizontal wells and delay the water breakthrough time of horizontal wells is a comprehensive problem. It is necessary to carry out targeted water control measures in terms of the water discharge of horizontal wells so ...
Claims
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IPC IPC(8): E21B33/122E21B23/06
Inventor 邢洪宪刘传刚刘鹏王昆剑王伟罗建伟李瑞丰
Owner CHINA NAT OFFSHORE OIL CORP