The analysis of reasons of the fissure after palatoplasty and the method of prevention and cure;

Study and application of refracturing technique in SN oilfield;

Research and application of shielding temporary sealing and refracturing techniques in BZ block of Junggar basin;

Fuzzy control of the discharge pressure of sand pump during refracturing;

Based on that, compound fracture tech of trying to squeeze with fracture, acid treatment before fracture, separating layer by sand face or packer is put into practice which reaches the purpose of developing flowing capacity of crack and raises successful ratio of the fracture.

To the three low oil layers with seriously low heterogeneity and inadequate formation energy,compound fracture technology combines advantages of high energy gas fracturing technology with hydraulic fracturing technology to effectively achieve the goal of increasing productivity and injection increasing.

Application of Re-fracturing Technology in Low-permeability Oilfield of Jianghan

Part of the research on oil well re-fracturing was carried out in Jianghan Oilfield and as well as the recognition of re-fracturing mechanism in the oilfield were introduced.

stress field induced by existed fractures and oil production in SN Oilfield is simulated in this paper, it is proven that the azimuth of new fractures created by re-fracturing will be different from that of existed fractures on the base of principle of minimum principal stress.