Cementing regulator for oil well cement
A technology of coagulation regulator and oil well cement, which is applied in the field of gelation regulator for oil well cement, which can solve the problems of abnormal thickening curve, sudden change of thickening linear shape, and "wrapped core" to achieve convenient raw material procurement, low production and processing costs, The effect of small addition
Active Publication Date: 2019-09-06
CNPC BOHAI DRILLING ENG +1
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- Application Information
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to solve the defects of abnormal thickening curve, sudden change of thickening linear shape, and "wrapping" of oil well cement slurry in the range of 120°C-150°C caused by the AMPS polymer fluid loss reducer, which affects To solve the problem of cementing safety, provide a gelling regulator for oil well cement, which can ensure that the thickening curve of AMPS polymer fluid loss reducer is normal in the temperature range of 120°C-150°C , and has no special impact on other comprehensive properties of the AMPS cement slurry system, meeting the cementing construction requirements of complex formations such as high temperature and high salt content
Method used
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Embodiment 1
[0020] Weigh 25% of silicon powder, 30% of sodium silicate, 18% of sodium sulfate and 27% of borax by weight percentage, mix them uniformly in a mortar and grind them into powder to obtain the gelling regulator for oil well cement.
Embodiment 2
[0022] Weigh 20% silica fume, 35% sodium silicate, 8% sodium sulfate, 12% potassium sulfate and 25% borax by weight percentage, mix them uniformly in a mortar and grind them into powder to obtain oil well cement Gel conditioner.
Embodiment 3
[0024] Weigh 30% of silicon powder, 25% of sodium silicate, 20% of potassium sulfate and 25% of borax by weight percentage, mix them uniformly in a mortar and grind them into powder to obtain the gelling regulator for oil well cement.
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Abstract
The invention discloses a cementing regulator for oil well cement. The cementing regulator for oil well cement is prepared by compounding, by weight percentage, 20%-35% of silica powder, 25%-35% of sodium silicate, 15%-20% of sulphate and 20%-30% of borax Na2B4O7 10H2O. The cementing regulator for oil well cement can guarantee the normal thickening curve of AMPS polymer fluid loss agents in the temperature interval of 120 DEG C-150 DEG C, has no special influence on other comprehensive properties of AMPS cement slurry systems, and meets the well cementing construction requirements of high-temperature or high-salt-content complex formations.
Description
technical field [0001] The invention relates to an oil well cement admixture in the fields of drilling, completion and well cementing during oil and gas field development, in particular to a gelling regulator for oil well cement. Background technique [0002] Exploitation of deep wells, ultra-deep wells, old oil fields, low-permeability oil reservoirs and unconventional oil and gas resources is the main direction of future development of domestic oil and gas fields. They are complex, and most of them have the common characteristics of difficult drilling and completion technology and mining. In particular, the number of deep wells and ultra-deep wells is increasing, and the performance requirements of oil well cement slurry will become extremely stringent. High temperature and high salt content are the biggest obstacles for oil well cement admixtures to exert their optimal performance. Researchers at home and abroad For the harsh conditions of high temperature and high salt ...
Claims
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IPC IPC(8): C04B22/14C04B103/44
CPCC04B40/0039C04B2103/44C04B14/06C04B22/0013C04B22/142C04B12/04
Inventor 凌勇刘文明林志辉付家文齐奔李小林宗勇黄伟佳郑其林董胜男王翔宇任硕
Owner CNPC BOHAI DRILLING ENG