Segmented well completion method and column jacket
A well completion pipe string and pipe string technology, which is applied in the segmented well completion method and the field of pipe strings, can solve the problems of polluted oil layers, inconvenient operation, low recovery rate, etc., and achieve oil layer protection, uniform steam injection, increase productivity and The effect of recovery factor
Inactive Publication Date: 2009-08-12
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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Problems solved by technology
However, this completion method has the following disadvantages or deficiencies: ① seriously pollutes the oil layer, reducing the productivity and recovery of the oil well; It will cause uneven steam injection and low recovery; ③The oil well cannot effectively shut off water after the water cut rises; ④It will bring a lot of inconvenience to the later operation of the oil well
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[0014] A segmented well completion method, comprising the following steps: (A) running a completion string into the wellbore 5 to perform upper cementing; and (B) running a cement injection string into the completion string to the bottom of the artificial well ; (C) Inject cement slurry from the top of the cementing pipe string to the annulus between the completion pipe string and the cementing pipe string, close the casing valve, and pressurize the expansion metal bellows packer group 4; (D) Open the casing valve, wash the well with large displacement reverse circulation, wash out the excess cement, and complete the staged cementing.
[0015] refer to Figure 1-Figure 2 , a segmented completion string, including a completion string and a cementing string, the completion string includes a completion casing 1 lowered into a wellbore 5 and a cementing device 2 installed below it. The casing outer packer 3 and the metal bellows packer group 4 are installed at the lower part of t...
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The invention relates to a method and a pipe column for sectionally completing a well. The method comprises the following steps: (A) running a well completing pipe column into a pitshaft, and carrying out upper part well cementation; (B) running a cementing pipe column into the well completing pipe column to the bottom of an artificial well; (C) injecting cement slurry from the top of the cementing pipe column to an annular space between the well completing pipe column and the cementing pipe column, closing a sleeve valve, and pressurizing an expansive metal bellow packer group; and (D) opening the sleeve valve, washing a well by a large discharge capacity inverse circulation mode, washing out redundant cement, and completing the sectional well cementation. The pipe column comprises the well completing pipe column and the cementing pipe column, and the well completing pipe column comprises a well completing sleeve running into the pitshaft and a cementing device arranged on the lower part. The method and the pipe column are characterized in that the lower part of the cementing device is provided with the packer outside the sleeve and the metal bellow packer group, and the cementing pipe column comprises an oil pipe column running into the well completing pipe column, a sieve pipe and a guide shoe which are connected and arranged in sequence.
Description
1. Technical field [0001] The invention relates to a well completion method for oil production, in particular to a segmented well completion method and a pipe string. 2. Background technology [0002] The traditional well completion method is to inject cement slurry from the casing in general, return to the design height from the annular space between the casing and the well wall, wait for solidification, then perforate, and then run the sand control tool in the pipe for sand control in the pipe. However, this completion method has the following disadvantages or deficiencies: ① seriously pollutes the oil layer, reducing the productivity and recovery of the oil well; It will cause uneven steam injection and low recovery; ③The oil well cannot effectively shut off water after the water cut rises; ④It will bring a lot of inconvenience to the later operation of the oil well. 3. Contents of the invention [0003] The purpose of the present invention is to provide a staged well ...
Claims
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IPC IPC(8): E21B33/13
Inventor 彭汉修张全胜孙焕泉王增林田启忠李海涛任家敏杨洁曹雪梅牛光海姚桂玲
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC