Research Of The Seismic Exploration In Southern Plunge Of Liaodong Uplift

Liaodong Bay is one of the important producing regions in the Bohai oilfield, but the degree of oil-gas exploration in Southern Plunge of Liaodong uplift is low. Accompany with the quickly progress of oil-gas exploration, this region has been became an important target in Liaodong Bay. However, because of the 2D seismic data, there are some primary petroleum geological problems in this region, such as the structural evolution and the reservoir distribution. These problems restrain the exploration steps, and more they have become the restrictions to the hydrocarbon exploration.For this reason, this paper choose Southern Plunge of Liaodong uplift and its adjacent sags as the target, and try to settle these puzzles mentioned above with the assistance of modern theories of petroleum geology and advanced physical geography technology. Under the direction of these theories, integrated analysis that consist of 3D seismic interpretation,reservoir research and tectonic dynamics are conducted. The favorable exploration targets in Southern Plunge of Liaodong uplift have been founded. This study is practical significance to the understanding of the structural features and hydrocarbon accumulation rules in Liaodong uplift, at the same time, it has positive effect to enrich and develop the theories of tectonic evolution.In this paper, based on the theories and the methods of physical geography, the genesis and the characteristics of strike-slip structures are systematically studied in Southern Plunge of Liaodong uplift and its adjacent sags. The relationships between strike-slip movement and extensional movement and the influences on hydrocarbon accumulation are systematically analyzed. The results show that the activities of the Tan-Lu fault were very clear and typical performance, and were mainly associated with the large-scale hydrocarbon accumulation in this region. Its adjacent sags were formed by the processing of strike-slip movement and extensional movement together. The extensional structures and strike-slip structures were two relatively independent structural systems in the shallow earth's crust of the basin areas in the Cenozoic, which had been transformed and changed by another one in the space, and finally formed the complicated tectonic stacking or tectonic complex. The extensional structures were the main structures, which controlled the formation and growth of the basin. The strike-slip structures which mainly began to grow in the caprock of basin in the Oligocene had obvious signs of activity during Neogene to Quaternary. However, the extensional fault which had strong activities in the Eocene or even in the Paleocene, become non-activity from Neogene to Quaternary. Therefore, the strike-slip movement was the key to control the hydrocarbon accumulation in the region.According to the researches of strike-slip movement, the seismic exploration in Southern Plunge of Liaodong uplift was mainly studied. The characteristics of trap and fracture in several structures were analyzed. Combined with several geophysical methods, such as seismic attribute analysis, the reservoir was predicted. The characteristics of strike-slip structure and several sediment systems in Dongying Formation were confirmed in this region. The results show that many structures are good targets for the next oil-gas exploration in the region, which have good foundations of structure and reservoir.Fiber-optic reflective displacement sensor attracts much attention for its particular advantages, such as simply theory, easy realization, good stability and so on. With the requirement of wide measurement range and high precision, it is re-designed based on the basic principle of the simplest reflective fiber-optic sensor. For some work having been finished at the beginning of this project, I will mainly describe the electric circuit.