An Environmentally Friendly Non-foaming Anti-water Blocking Agent

CHU Qi

doi:10.12358/j.issn.1001-5620.2023.04.009

Volume 40 Issue 4

Jul. 2023

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Article Navigation > DRILLING FLUID & COMPLETION FLUID > 2023 > 40(4): 475-480

CHU Qi.An environmentally friendly non-foaming anti-water blocking agent[J]. Drilling Fluid & Completion Fluid，2023, 40（4）：475-480 doi: 10.12358/j.issn.1001-5620.2023.04.009

Citation:

CHU Qi.An environmentally friendly non-foaming anti-water blocking agent[J]. Drilling Fluid & Completion Fluid，2023, 40（4）：475-480 doi: 10.12358/j.issn.1001-5620.2023.04.009

CHU Qi.An environmentally friendly non-foaming anti-water blocking agent[J]. Drilling Fluid & Completion Fluid，2023, 40（4）：475-480 doi: 10.12358/j.issn.1001-5620.2023.04.009

Citation:

CHU Qi.An environmentally friendly non-foaming anti-water blocking agent[J]. Drilling Fluid & Completion Fluid，2023, 40（4）：475-480 doi: 10.12358/j.issn.1001-5620.2023.04.009

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An Environmentally Friendly Non-foaming Anti-water Blocking Agent

doi: 10.12358/j.issn.1001-5620.2023.04.009

CHU Qi^{1，2
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1.
SINOPEC Research Institute of Petroleum Engineering Co., Ltd, Beijing 102206
2.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206

Received Date: 2023-04-23
Rev Recd Date: 2023-05-16
Publish Date: 2023-07-30

Abstract

Abstract

In order to improve the bubble inhibition and environmental protection performance of the waterproof locking agent for drilling fluid, a natural modified product SMFS-1 was synthesized from alginic acid, 2-(2-aminoethylamino)ethanol (AEEA), epichlorohydrin (ECH) and pentaerythritol (PETP) as raw materials. The molecular structure was characterized by Fourier infrared spectrometer (FT-IR). The test results of waterproof lock performance show that the surface tension of aqueous solution can be reduced to less than 25 mN/m after the addition of SMFS-1, which can reduce the volume of core self-absorption, promote the change of rock surface from hydrophilic to neutral, and increase the recovery value of core permeability to more than 80%. SMFS-1 is resistant to temperature up to 120 ℃, has excellent adsorption performance, no bubbling effect, and has little impact on rheological properties and filtration properties of drilling fluid. The environmental performance test results showed that the semi-lethal concentration (EC₅₀) of SMFS-1 was 32,250 mg/L, and the biodegradability evaluation index (Y) was 17.36, which met the emission standard and was easy to biodegrade.
- Anti-water blocking agent,
- Drilling fluid,
- Water-lock damage,
- Non-foaming,
- Environmental performance

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References(12)

References

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An Environmentally Friendly Non-foaming Anti-water Blocking Agent

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