Study On The Old Well Investigation And Exploration Potential Of Dry - Latent Tectonics In

The Carboniferous reservoir has become the main gas producing in Sichuan Basin through few years of exploration and development. But it has been entering into the middle-late periods. This study combines the result of previous abundance evaluation and put the low abundance region of Dachiganjing structural belt in east Sichuan as the research areas, Most of the target wells are early appraisal well of the carboniferous, this paper through the study of old well review technology, combined with the drilling characteristics of old wells reviews on the target location by using conventional logging curve and the stratigraphic, lithologic, sedimentary, reservoir characteristics, structure and characteristics of trap, evaluation of potential of the Carboniferous of low abundance region of Dachiganjing structural belt in east Sichuan.And carried on the research of overlying strata on the old well, then find the potential layer.The main results of the paper and the understanding achieved as follows:The Carboniferous residual layer thickness is not the same, in the study area, Carboniferous strata thickness is gradually thinning from North East to South West, Research on reservoir characteristics shows that the dolomite is the main reservoir of Carboniferous strata, the main reservoir space types are intergranular space, gravel pores. Reservoir physical parameters is always performance characteristics of low porosity and low permeability, the development of reservoir obviously shows that the North is much better than the south. According to the geologic characteristic of the area and the research of predecessors of existent well review evaluation techonology, this paper put forward to the integrated data reviews of mud logging, logging, oil test, and then looking for suspicious gas layers. To be first, established the log interpretation model and carry out research on logging comprehensive interpretation. According to the comprehensive study of stratigraphy, structure, reservoir, fluid and reserves of the low abundance region of Dachiganjing structural belt in east Sichuan, can be carried out in-depth study of Carboniferous potential areas for ShiFoPing and ChiDong lithologic-stuctural combination trap.