The Study Of Logging And Geology For M Oilfield In Central Asia

The M area of the Fergana Basin is located in the piedmont strike zone of the basin.The reservoir is horizontally connected and mainly controlled by the structure.The oil and water system of the reservoir is complex,part of the reservoir are lithologic deposit.The study area includes formation III,IV,V,VII of M area,the distribution of the formations is stable and the precipitation facies of them is bund-epeiric sea.The geological structure and sedimentary characteristics of study area were analysed,combined with the interpretation of logging data.Then stratigraphic divisions and comparisons of the blocks were made to establish a sequence stratigraphic framework.The sedimentary facies analysis of the reservoir was completed,and the “four characteristics” of the reservoir were studied.Using natural gamma logging,the shale content of the target zone in the study area was calculated.By combining acoustic logging with shale content,a porosity interpretation model was established.Through comparing parameters such as buried depth,lithology,physical properties and porosity between study area and Changqing Oilfield,the geological condition of them came out to be similar,so the petroelectric parameters of Changqing Oilfield were used for reference.The oil saturation model of the study area was established by using the Archie formula.By combining sensitivity statistical analysis and intersection graph,the lower limit of the effective thickness of the reservoir was determined.Combining the results of oil testing,production and log interpretation,the reservoir fluid properties and fluid interface were determined.Based on the production of the block,a set of theories suitable for logging evaluation in the area were concluded,providing reliable technical support for exploration and development in the M area of the Fergana Basin.