Process for performing well drilling, well cementing and well completing at low-pressure oil reservoir side
A drilling and cementing, low-pressure oil technology, applied in drilling equipment, wellbore/well components, earth-moving drilling, etc., can solve problems affecting oil reservoir development and production, lost circulation, poor cementing quality, etc. The effect of cementing quality, loss reduction and additional reduction
Inactive Publication Date: 2012-04-25
联合石油天然气(盘锦)有限公司
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Problems solved by technology
It overcomes the problem that lost circulation is easy to occur in the cementing process of the existing technology, which leads to poor cementing quality and affects the development and production of oil reservoirs.
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[0014] Such as figure 1 , figure 2 As shown, a low-pressure oil reservoir sidetracking well cementing and completion process includes the following steps:
[0015] A. Reaming the original wellbore 1 after the sidetracking well in the low-pressure oil reservoir is completed;
[0016] B. After the reaming is completed, run a completion casing into the reamed wellbore 2;
[0017] C. Run into the U-shaped tube low-pressure cementing device 3;
[0018] D. Running into the well completion casing with cement umbrella 4 installed;
[0019] E. Use low-density cement slurry to cement the well.
[0020] It can be understood that the above specific descriptions of the present invention are only used to illustrate the present invention and are not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or Equivalent replacements to achieve the same t...
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The invention relates to the technical field of well cementing and well completing for oil fields, in particular to a process for performing well drilling, well cementing and well completing at a low-pressure oil reservoir side. The process comprises the following steps of: A, reaming an original well bore after well drilling is completed at the low-pressure oil reservoir side; B, descending a well-completing casing pipe in the well bore after reaming is finished; C, descending a u-shaped pipe low-pressure well cementing device; D, descending a well-completing casing pipe provided with a cement basket; and E, cementing a well by adopting low-density cement. According to the invention, the well drilling and well cementing quality at the low-pressure oil reservoir side is increased, a fire flooding based oil reservoir exploiting effect is ensured, and the defects that the well cementing quality is poor and the exploitation and production of the oil reservoir are influenced because loss circulation is easily caused in a well cementing process of the prior art are overcome.
Description
Technical field: [0001] The invention relates to the technical field of well cementing and well completion in oil fields, in particular to a sidetracking well cementing and well completion process for low-pressure oil reservoirs. Background technique: [0002] Fire flooding is an oil recovery method suitable for low-pressure reservoirs. At present, the common problem faced by the completion of sidetracking wells in old blocks of the oilfield is low formation pressure. Density cement slurry cementing is prone to lost circulation during the cementing process, resulting in poor cementing quality and affecting the development and production of the reservoir. Invention content: [0003] The technical problem to be solved by the present invention is to provide a low-pressure oil reservoir sidetracking well cementing and completion process, which realizes the improvement of the low-pressure oil reservoir sidetracking well cementing quality and ensures the effect of fire flooding ...
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IPC IPC(8): E21B33/136E21B7/28
Inventor 王春鹏贾庆仲宋金仕彭钢曹生丁文正孔冬梅
Owner 联合石油天然气(盘锦)有限公司