| abstract |
The invention relates to an anti-slump drilling fluid used in the fractured carbonate rock formation in the field of oil drilling and a preparation method and application thereof. The anti-slump drilling fluid may include the following components in parts by weight: 1,000 parts by weight of water, 15-40 parts by weight of drilling fluid bentonite, 5-35 parts by weight of micro-nano plugging agent, temperature-sensitive plugging and anti-slumping 20 to 70 parts by weight of an inert weighting agent, 15 to 30 parts by weight of a graphene hydrogel, and 0 to 1600 parts by weight of an inert weighting agent. The anti-slump drilling fluid of the present invention has good anti-slump performance, rheological performance, temperature resistance and lubricating performance, can effectively reduce the risk of wellbore instability in the fractured carbonate rock formation, and reduce poor drilling and jamming , to ensure safe underground construction, and has broad application prospects. |