Research On Logs Interpretation Methods Of Tight Sandstone Reservoir Of Yingcheng Formation In Lishu Fault

Tight clastic reservoirs are characteristics with low porosity and low permeability.which reduce contributions of reservoir fluids to geophysical logging responses,and it is more difficult to identify fluids of the reservoir.Therefore,it is necessary to study log interpretation and comprehensive evaluation of reservoir of low porosity and permeability clastic reservoirs.This study focused on geological characteristics of tight clastic reservoir of Yingcheng formation with low porosity and low permeability in Lishu Area.Firstly,core analysis data including porosity,permeability,and formation water are used to make different interpretation models for different formations and areas with different porosity.Then,logging responses of different formation and areas are summarized in detail,and the relations among logging responses and lithology,porosity,permeabiltu,and hydrocarbon saturation are studied and analyzed.Combined with the production test results of target reservoirs in Lishu area,the fluid properties and logging responses are carried out.Next,a series of corrections among lithology,physical properties,and logging responses are discussed,and some fluids typing methods are studied and the effective methods are chosen.Next,the effective reservoir limit standard based log interpretation and reservoir parameters are determined.Finally,these established models and methods are applied into the target wells in the study area for fine logs interpretation,and new understanding and evaluation results of the reservoir are attained.These research results provide an important basis for oil field development.