| With the continuous development of oil and gas exploration and development,the discovery of oil and gas fields with complex geological conditions and higher requirements for oilfield development economic benefits,the scope of application of horizontal wells is becoming more and more common.Compared with vertical well logging,horizontal well has great advantages.Horizontal well can penetrate natural fractures to a great extent and increase oil drainage area,which is more conducive to reservoir development in well area.In this paper,the tight sandstone reservoir of group B in well block m is studied.First of all,the regional geological survey of the well area is investigated and analyzed.For the area with complete logging data,the logging response of horizontal section of horizontal well and vertical section of corresponding horizon is compared and analyzed.Through comparison,it is found that the logging environment of horizontal well has little influence on natural gamma,density,acoustic time difference and neutron,but great influence on resistivity.Therefore,the resistivity curve is corrected.In this paper,COMSOL is used to carry out the three-dimensional finite element numerical simulation calculation,and the environment correction chart is established according to the calculation results,and the correction formula is fitted by the chart to realize the environmental correction of horizontal well resistivity curve.According to the coring data and analysis and laboratory data of the study area,the shale content,porosity and saturation model in accordance with the reservoir in the study area are established;83 cores are classified according to the shale content,and then the permeability interpretation model under different shale content is established through the relationship between core porosity and permeability,and the above model is used to calculate the physical parameters of the reservoir in the study area.Then,the controlling factors of rock mechanics parameters are analyzed,and the prediction model of S-wave time difference of wells without dipole S-wave logging data is established by using S-wave time difference,P-wave time difference,density and natural gamma ray logging data.Then,Young’s modulus and Poisson’s ratio are calculated by using S-wave time difference,and the dynamic and static transformation is carried out Force.According to the permeability interpretation results and brittleness index interpretation results of horizontal wells in the study area,the classification standard of tight reservoir is established,and the tight reservoir is classified.Finally,the logging data of 4 horizontal wells in the study area are processed by this interpretation method,and the logging interpretation results are compared with 738 core analysis results.The results show that the logging interpretation results are accurate and reliable,and the application effect is good in this area,which plays a great role in promoting the efficient development of the oilfield. |
