Cha 39 Fault Blocks Of Sedimentary Microfacies Study

After the geological characteristics and production features of the 39th fault block in the Chaheji oilfield have been comprehensively, profoundly and carefully researched, the fine description of reservoir model is established, and the 3D structure and sediment features and the spatial distribution of single sand properties have been analyzed, such as porosity, permeability and saturation. The displacement mechanism and percolation characteristic have been studied in laboratory to describe the remaining distribution. The results are achieved as below.1. In combination with 3D seismic data and well logging, the structure is confirmed. And the reservoir bed and structure situation is confined by integration of production performances.2. The integral parallel method of GM data as well as Rt, SP curves and injection-production information between production layers, has been applied to make mends of the single parallel method based on sand. This way solved the conflict problems between geological features and development performances.3. the results have been achieved such as 3D sediment micro-facies model, 3D configuration of single sand body, the plane distribution of micro-facies and sediment rhythm and lithology diversification in single sand body, the 3D distribution of the key parameters of porosity and pressure in current situation, the remaining oil distribution model in single sand. The results indicate remaining oil potential and the feasible measurement has been pointed out.According to the achievements, the improvement measurement has been made in the 42 wells in the 39th fault block. The nature degression is slow and total improvement production added up to 17.265 thousand t In 2002-2003. the recovery ratio is expected to increase by 3%.