Application of in-situ stress profile to hydraulic fracturing;

In this paper, the stress profiles in thermal - cycle, random - vibration and thermal & vibration composition test are illustrated, which includes the selecting of different stresses, the defining of the stress magnitude and applying order of various stresses.

In this paper, pressure profile adjustment technique for multi-layer and multiple pressure system reservoir in adjustment well drilling block during the process of drilling is studied.

The pressure profile adjustment reduces the high-pressured lamination strength, maintains the low-pressure lamination strength, realizes reduces to the oil layer pollution, reduces the drilling cost based on the existing oil-field development plan.