HTHP Anti-channeling Liquid Silica Latex Cement Slurry Used in Block SN

CHEN Chao; WANG Long; LI Pengfei; YANG Zhongzu; WANG Weizhi

doi:10.3969/j.issn.1001-5620.2016.05.019

Volume 33 Issue 5

Sep. 2016

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CHEN Chao, WANG Long, LI Pengfei, YANG Zhongzu, WANG Weizhi. HTHP Anti-channeling Liquid Silica Latex Cement Slurry Used in Block SN[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(5): 88-91. doi: 10.3969/j.issn.1001-5620.2016.05.019

Citation:

CHEN Chao, WANG Long, LI Pengfei, YANG Zhongzu, WANG Weizhi. HTHP Anti-channeling Liquid Silica Latex Cement Slurry Used in Block SN[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(5): 88-91. doi: 10.3969/j.issn.1001-5620.2016.05.019

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HTHP Anti-channeling Liquid Silica Latex Cement Slurry Used in Block SN

doi: 10.3969/j.issn.1001-5620.2016.05.019

1.
Petroleum Engineering Supervision Center of Sinopec Northwest Oil Field Company, Urumqi, Xinjiang 830011
2. Shelfoil Petroleum Equipment & Services Co., Ltd., Dezhou, Shandong 253034
3. Research Institute of Engineering, CNPC Bohai Drilling Engineering Company Limited, Tianjin 300457

Received Date: 2016-05-05
Publish Date: 2016-09-30

Abstract

Abstract

Wells drilled in the Block SN have high bottom hole temperature under static conditions, and the gas zones are very active. Prevention of well kick and lost circulation during drilling is quite difficult. Latex anti-channeling cement slurry alone has been used in the past in well cementing, but it didn't work well. Liquid silica latex, as a nanometer anti-channeling agent, has active SiO₂ that will take part in the hydration reaction of cement. It thus helps increase the strength, reduce the elastic modulus and permeability of set cement. By optimizing the amount of silica used and the ratio of coarse particle over fine particle silica, a high temperature antichanneling liquid silica latex cement slurry was developed. This cement slurry had filter loss less than 50 mL, a right-angle thickening curve, an SPN less than 1, good anti-channeling performance and settling stability. SEM and XRD analyses demonstrated that a dense set cement can be acquired. Tobermorite and xonotlite, instead of Ca(OH)₂, were found in the hydrated cement, and this results in a stable strength of the set cement at elevated temperature. High pressure gas zones in wells drilled in Block SN have been effectively cemented with this anti-channeling liquid silica latex cement slurry.
- Gas well,
- Well cementing,
- Anti-channeling latex cement slurry,
- Liquid silica,
- High temperature tolerance

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References

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沈阳化工大学材料科学与工程学院沈阳 110142

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HTHP Anti-channeling Liquid Silica Latex Cement Slurry Used in Block SN

doi: 10.3969/j.issn.1001-5620.2016.05.019