Geological Genetic Analysis of Structures

The analysis of structural geological genesis analysis plays an important role in the development of oil and gas fields. Based on the research status at home and abroad, the advantages and disadvantages of structural geological genesis analysis in oil and gas field development are compared in detail on the basis of literature research. Eight aspects of structural geological genesis analysis in the development of oil and gas fields were summarized. Methods of structural geological genesis analysis in oil and gas field development mainly include: basic geological research method, field description method of outcrop observation, core observation and description method, the microscopic thin section observation method, physical simulation method, all kinds of well logging, seismic interpretation method, analysis and test methods, geological modeling method, the dynamic monitoring and dynamic methods of production. The advantages and disadvantages of each method are analyzed according to the research examples. On this basis, it points out that there are 8 main problems and 8 developing trends in structural geological genesis analysis in oil and gas field development. Fracture has a very important influence and control function on reservoir properties, so it has always been one of the important research contents in the development of oil and gas fields. The research foundation of fracture system in oil and gas field development is introduced from two aspects of data base and research method. Respectively taking the Member 1 of Yingcheng Formation in Xudong area of Songliao Basin, the group of glutenite reservoir in northwestern margin in Junggar basin, and Yulou oil bearing sets in some experimental area in the west slope in the western depression of Liaohe Basin as an example, detaily introduced researches on fracture in the application of oil and gas field development. The work is introduced from fracture study in the volcanic rock gas reservoir development plan design, glutenite reservoir conformation analysis of fracture and heavy oil thermal recovery hidden fracture system and other aspects. Based on the above examples, the difficulties and hot issues in the study of fault system in the development of oil and gas fields are discussed. The results show that the precise characterization of fault and fracture development location, size and distribution rules, analysis of fracture reservoir configuration, fine interpretation and modeling of fault, and evaluation of fault sealing property are closely related to the effective development of oil and gas fields, which should be paid enough attention to in the development of oil and gas fields. From origin aspect, carved up volcanic reservoir fractures of the Member1 of Yingcheng Formation in Xudong Area in Xushen Gas Field to tectonic fractures and condensation contracted fractures and exploded fractures and corrosion fractures and stitched stracks and weathing fractures. Guided mentality of dynamic and static combining, cores and microsection and FMI logging data and seismic variance and ant tracking technology were used and characteristics of all kinds of fractures in the aim stratum in study area were detailedly described. The results indicated that fractures developed along Xuzhong Faults and Xudong Faults and presented north to south direction in macroscopic view. And many fractures developed along east to west direction in microcosmic view at the same times. Fractures genetic mechanism were analysised, fractures of volcanic reservoir of the Member1 of Yingcheng in Xudong Area in Xushen Gas Field were effected by the structure function and volcanic lithology and volcanic bodies and volcanic lithofacies and diagenesis. And structure function and diagenesis played the leading role.