There are over-thrust folding structure and compression structure in the formations of MR Oilfield,and there exists the overpressure in the drilled formation.

Quantitative evaluation on contribution of structural compression to overpressure and analysis on origin of overpressure in Kuqa Depression;

Research on inclusions and mudstone compaction curves shows that uncompaction and structural compression are the main factors resulting in abnormal high pressure in Early Cretaceous gas reservoirs.

Discovery of compressional structure in Wuerxun-Beier Sag in Hailar Basin and its geological significance

Through the research of the compressional structure drilled in Guxi buried low hill,it is discovered that the reversed fault is characterized by the upturning of beds in Low Paleozoic of the hanging wall,wedge invasion of igneous rock along the level in Upper Paleozoic near the bottom wall fractured surface.

Previous investigators considered that the origin of the overpressure now is mainly controlled by tectonic compression, and the charging of high-pressured gas and tectonic uplifting in addition, but generally not existing influence of undercompa.

The geological facts of the regional unconformity,the evolution of Mesozoic-Cenozoic fault and basin in the area show that there are five compression deformations in Mesozoic-Cenozoic period.

The Mesozoic faults,regional unconformities and basin evolution in the Yanshan area suggest that there occurred not only strong compression but also strong extension in the Yanshanian Stage.