DAMINTUN Depression West Low Mountain Reservoir Layer Character

This research item makes use of core observation,the thin slice authentication,scanning electricity mirror analysis,X-diffraction analysis,petrochemical analysis,pakage body temperature degree measurement,hair tube logging data in order to make a study and discussion on bedrock reservoir bed of Liao River low DaMin village sunken western low burial hill zone.We divide bedrock rock types in the middle and late Proterozonic Era as well as the Archaean Era into three types ,which are metamorphic rock ,deposition rock and the igneous dike.We think main metamorphic rock types of this area include mited granite ,mixed metamorphic rock,leptite,etc.The main types of deposition rock are silicatite and quartz sandstone.Making use of petrochemical analysis and petrography,Werecover ancient rock's construction on the Archaean Era,Through the practice,We find bedrock consists of a set of neutrality and basis volcanic rock ,volcanoclastic rock ,deposition rock and partial volcanic rock with acidity.We divide the evolution of becoming rocks into four periods: early region's metamorphic process and mixed lithifaction,sedimentation and becoming rocks process in middle and late Proterozonic Era and in the Paleozonic Era,trasformation process of burial hill layers in earth shell'uplift period in the Mesozonic Era, and transformation process to burial hill in the Cenozonic Era.Through package body temperature degree measurement, we make a study on the source and packing period of fissure packings. Reservoir space types include two categories and nine types. From the point of reservoir bed'evolution, We analyze factors of bedrock reservoir space's development. The thesis points out the main factors which affect the reservoir bed development of this area. These main factors include tectonic action, packing action, weathering, corrosion, as well as rock and minerals types.We have analysed eight important oil wells of this area, and have made detailed description and comprehensive evaluation on single well's reservoir bed characteristics. According to the analyses on region stress field, We simulate ancient tectonic stress field and predict fissure development degree on research district. We get the results that maximum main stress value is 110~80 Mpa, mainly distributes in the North of oil well of sheng23 and in the South of oil well 166 of shen. The high value zone in middle Proterozonic Era is near well 229 and in the South of well 169 of shen, and stress value is above-90Mpa. The fissure development region accords to maximum main press.