Laboratory Study on Clay-free Water-based Drilling Fluid in X Oilfield of Bohai Sea

WAN Liping; ZHANG Xiaolong; ZHANG Li; XIE Meng; WANG Bohui

doi:10.12358/j.issn.1001-5620.2021.05.010

Volume 38 Issue 5

Sep. 2021

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Article Navigation > DRILLING FLUID & COMPLETION FLUID > 2021 > 38(5): 605-610

WAN Liping, ZHANG Xiaolong, ZHANG Li, et al.Laboratory study on clay-free water-based drilling fluid in x oilfield of bohai sea[J]. Drilling Fluid & Completion Fluid，2021, 38（5）：605-610 doi: 10.12358/j.issn.1001-5620.2021.05.010

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WAN Liping, ZHANG Xiaolong, ZHANG Li, et al.Laboratory study on clay-free water-based drilling fluid in x oilfield of bohai sea[J]. Drilling Fluid & Completion Fluid，2021, 38（5）：605-610 doi: 10.12358/j.issn.1001-5620.2021.05.010

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Laboratory Study on Clay-free Water-based Drilling Fluid in X Oilfield of Bohai Sea

doi: 10.12358/j.issn.1001-5620.2021.05.010

College of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500

Received Date: 2021-07-05
Publish Date: 2021-09-30

Abstract

Abstract

In the light of there are some problems in X oilfield of Bohai Sea, such as clay dispersion, soft mud shrinkage, sticking when tripping out, medium and high porosity and permeability in reservoir section. Through the optimization of rheology regulator, fluid loss reducer, lubricant, inhibitor and other main treatment agents, The formula of soilless drilling fluid suitable for Bohai X oilfield is formed, The formula is: Seawater+0.2%NaOH+0.2%Na₂CO₃+0.3%PF-VIS+0.3%FA-367+0.6%PAC+2.0%PF-Lube+2%K-HPAM+1.5%ultrafine calcium carbonate+1.5%dual solution temporary plugging agent+1%nanoplugging agent JF-1+HCOONa(depending on density),The drilling fluid does not use bentonite to structure, which can effectively reduce the damage to the reservoir, The rolling recovery rate of drilling fluid is over 90%. It has good thermal stability and anti cuttings pollution ability. The compressive strength of the plugging layer is more than 7 MPa, Sodium Sodium formate is selected as weighting agent of drilling fluid, and the corrosion rate of weighted drilling fluid on WM95S pipe is only 0.0359 mm/a.
- Drilling fluid,
- Clay-free,
- Anti pollution,
- Corrosion resistance,
- Bohai oilfield

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References

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Laboratory Study on Clay-free Water-based Drilling Fluid in X Oilfield of Bohai Sea

doi: 10.12358/j.issn.1001-5620.2021.05.010