Laboratory Study on Core Fracturing Simulations for Wellbore Strengthening

Table 7

The results of the core fracturing experiment under the action of different materials.

Number	Formula	Fracture pressure (MPa)	FLAPI (mL)
1	Water-based base drilling fluid + 10% B (calcium carbonate)	23.56	4
2	Water-based base drilling fluid + 10% B (quartz sand)	22.96	4.4
3	Water-based base drilling fluid + 10% B (graphite)	21.48	4.4
4	Water-based base drilling fluid + 10% B (polyester)	25.66	5
5	Water-based base drilling fluid	18.99	5.8
6	Water-based base drilling fluid + 3% emulsified asphalt	18.5	5.2
7	Water-based base drilling fluid + 10% B (calcium carbonate) + 3% emulsified asphalt	27.92	3.2
8	Water-based base drilling fluid + 10% B calcium carbonate + 3% nano calcium carbonate	24.56	3.6
9	Water-based base drilling fluid + barite	26.55	4.8