Compound drilling fluid for natural gas hydrate (NGH) reservoir in siltstone
A drilling fluid and natural gas technology, which is applied in the field of natural gas hydrate exploitation, can solve the problems of easy collapse and fracturing of the wellbore, increase the formation collapse pressure, and increase the permeability of the wellbore, so as to avoid the serious enlargement of the pore diameter and the strong shale inhibition ability. , inhibiting and reducing the effect of the solid phase
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0036] Embodiment 1, the content of each component in the drilling fluid is: the mass ratio of sodium formate is 2.8%, the mass ratio of sodium chloride is 9%, the mass ratio of ethylene glycol is 9%, the mass ratio of potassium chloride is 4.5%, humic acid The mass ratio of potassium is 1.8%, the mass ratio of potassium polyacrylate is 1.8%, the mass ratio of xanthan gum is 0.4%, the mass ratio of polyvinyl caprolactam is 0.8%, the mass ratio of ethylene glycol butyl ether is 0.8%, tetra-n-butyl The mass ratio of ammonium phosphate is 0.8%, and the remaining components are prepared water.
Embodiment 2
[0037] Embodiment 2, the contents of each component in the drilling fluid are: the mass ratio of sodium formate is 3%, the mass ratio of sodium chloride is 10%, the mass ratio of ethylene glycol is 10%, the mass ratio of potassium chloride is 5%, humic acid The mass ratio of potassium is 2%, the mass ratio of potassium polyacrylate is 2%, the mass ratio of xanthan gum is 0.5%, the mass ratio of polyvinyl caprolactam is 1%, the mass ratio of ethylene glycol butyl ether is 1%, tetra-n-butyl The mass ratio of ammonium phosphate is 1%, and the remaining components are prepared water.
Embodiment 3
[0038] Embodiment three, the contents of each component in the drilling fluid are: the mass ratio of sodium formate is 3.2%, the mass ratio of sodium chloride is 11%, the mass ratio of ethylene glycol is 11%, the mass ratio of potassium chloride is 5.5%, humic acid The mass ratio of potassium is 2.2%, the mass ratio of potassium polyacrylate is 2.2%, the mass ratio of xanthan gum is 0.6%, the mass ratio of polyvinylcaprolactam is 1.2%, the mass ratio of ethylene glycol butyl ether is 1.2%, tetra-n-butyl The mass ratio of ammonium phosphate is 1.2%, and the remaining components are prepared water.
[0039] The drilling fluid configuration methods of the above-mentioned examples 1, 2, and 3 are conventional drilling fluid configuration methods, and are evaluated by the following experimental methods:
[0040] 1 Evaluation of drilling fluid shale hydration inhibition
[0041] Inhibition evaluation experiment is an important part of the indoor evaluation of drilling fluid related...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com