Taking the reservoir of the Lower Permian Jiamuhe Formation Conglomerate Gas Reservoir in the Zhongguai Uplift as a research case, based on core observation, optical microscopy, and full spectrum scanning electron microscopy, this paper analyzes the development characteristics of turbidite in conglomerate reservoirs, explores its genetic mechanism, and analyzes the effects of filling, dissolution, and content changes of turbidite on reservoir properties. The following understanding are obtained. 1) Turbidite is not only filled in conglomerates, andesitic gravels, and primary gas pores within the particles, but also widely distributed among the gravel skeleton particles, accounting for over 80% of the cement content. It is closely related to the composition of basic and alkaline volcanic parent rocks in the study area. 2) The origin of zeolite in the study area can be divided into two types: endogenous and exogenous. The zeolite formed by endogenesis is filled in the primary pores of andesitic gravel, which is related to the low-temperature hydrothermal process or contact metasomatism of volcanic rock; The zeolite of exogenic type is formed by the alteration of various volcanic lava and tuff with high glassy content by alkaline aqueous solution after devitrification and filling in the pores of gravel skeleton, which makes the reservoir compact. The typical zeolite is formed by weathering and leaching. 3) Zeolites have a significant impact on the reservoirs in the study area. In the early alkaline environment, the filling and cementation of a large amount of zeolites have a negative effect on the densification of the reservoir. In the later acidic environment, some zeolites have a positive effect on the dissolution of secondary pores, with a large amount of filling in the gravel pores leading to the negative effect of densification. In summary, the degree of cementation, content, and later dissolution of zeolite minerals control the reservoir performance.

Analysis of sedimentary sequence, material composition and geochronology are used to study a newly discovered epimetarmorphic rock series in Wuhuaaobao area of Sunid Zuoqi, Inner Mongolia, and its paleogeographic significance is also discussed. The epimetarmorphic rock serie is characterized by the interbedded sequence of metavolcanic rock, metasandstone and marble, which contains three cycles and represents an upward-shallowing marine volcanic-sedimentary environment. The presence of multilayer volcanic rocks indicates that they formed during continuous magmatic activity. Zircon U-Pb age of the metavolcanic rock is 454.4±4.1 Ma, which is coincided with the magmatic rock ages of early Paleozoic Bolidao island arc belt in the north. Because the serie is located between the Baolidao arc magmatic belt in the north and the mélange belt in the south, its paleogeographic position should be an early Paleozoic forearc basin. Sequence, composition, age and position characteristics of the Wuhuaaobao epimetarmorphic rock serie reveal the presence of the forearc basin in the study area. Two evolutionary stages of the forearc basin have been suggested during subduction and collision, respectively, according to the early Paleozoic strata, magmatic rocks and metamorphic events.

As the impedance of the conventional plasma etching system at the edge of the wafer is not consistent with that at the center of the wafer, the movement trajectory of ions at the edge of the wafer is deviated and it is difficult to meet the more stringent requirements on etching process uniformity and high aspect ratio. A method to optimize the movement direction of edge ions by adjusting the impedance of the wafer edge is proposed which can continuously and real-time adjust the movement trajectory of edge ions and control the direction of edge ions. The results show that the direction of ion movement can be optimized to be perpendicular to the surface of the wafer, the uniformity of the edge etch rate is optimized, and the vertical etching morphology is obtained.