The Research Of Logging Recognition Method Of Liuqid In Reservoir On Chang-8 Period In Hua Qing Qiao Chuan Area

Chang 8 reservoir in Qiaochuan area is source-reservoir contact with source storage,the distribution of oil and gas is mainly controlled by the geological actions,such as deposition,diagenesis,etc.Based on the analysis of sedimentary evolution and reservoir research,this paper analyzes the “quadruple” relationship of the reservoir in this area through comprehensive geological and various types of test data.Establishing reservoir parameter interpretation model,and fluid identification method suitable for study area was proposed to improve secondary recognition accuracy of the oil and water layers.Analyzing the local high resistance water production in study area's cause.The problem of complex relationship between oil and water in the study area was solved.The Chang 8 reservoir in this area is controlled by the delta front and half-deep lake deposition,the main body of the watercourse is larger in scale and sedimentation.The reservoir with medium porosity and low permeability,belongs to low permeability reservior.Combined with the previous geological understandings,based on the data of oil testing and test production,establishing the “four characteristics” relationship and reservoir parameter interpretation model for Chang 8 reservoirs in this area.Based on this,the plate identification method and double-layer water resistance were used.The rate method,correlation analysis method,and apparent resistance increase rate method are used to perform fluid fine-grained identification in the entire region to establish fluid identification standards.The question of “well testing data with high resistivity value” in local area was taken as the object for further study.The information of each well was dissected in detail and the reason was analyzed,forming mature series of Chang 8 reservoir identifing with former achievement.Combining the previous studies,the main controlling factors and hydrocarbon laws of the Chang 8 reservoirs were analyzed and the accumulation model was summarized.The optimization of favorable areas for production will be carried out to provide a certain basis for the future effective development of the Chang 8 reservoir in Qiaochuan area of Huaqing.