Calculation Model of Rock Fracture Pressure with Multifields in the Process of Fracturing

Table 3

Crustal stress and fracture pressure in oil formation in Dagang Oilfield.

Well No.	Average depth of well /m	Stratum pressure /MPa	Tensile strength /MPa	Effective overlying stress /MPa	Minimum horizontal effective ground stress /MPa	Maximum horizontal effective crustal stress /MPa	Predicted rupture pressure /MPa
							Measured fracture pressure	Li’s model	Huang’s model	The present study
X814	1293	11.17	7.84	15.48	12.74	24.99	32.24	14.32	28.05	29.58
G662	1375	12.35	2.94	16.27	10.00	19.11	26.16	8.92	24.79	27.95
G772	1381	12.15	2.94	16.56	11.17	21.36	27.24	9.86	24.76	27.81
Y811	1393	12.25	3.92	16.66	13.13	24.30	31.26	12.71	26.45	29.06
B842	2792	24.60	2.94	35.86	22.34	44.68	49.88	16.12	48.48	53.02
B888	3349	29.59	3.92	43.61	26.75	53.50	60.26	19.59	58.98	63.85
B46	3958	34.88	3.92	53.11	33.32	61.73	77.02	27.45	69.83	75.12
H114	2142	18.42	3.92	27.14	18.23	34.98	41.55	15.49	38.20	41.59
H115	2156	19.01	4.90	26.85	17.83	34.69	42.72	15.51	39.59	42.98