Study On The Application Of Array Induction Logging In Tough Reservoirs In Zhongyuan Oilfield

With the development of gas and oil exploration and exploitation,more and more complicated oil and gas layer such as the thin layer,thin inter bed of water flooded layer regain our attention though they got not enough at the beginning of exploitation.The identification and evaluation of those reservoirs put forward new request for logging tools and interpretation.For such problems,this article from the principle and structure of the high-resolution array induction logging instrument departure studied adaptive array induction logging,and the array induction logging curve inversion,so as to explore its low resistivity identification and evaluation of oil and gas and other aspects of the application layer,a thin layer of water flooded layer,shale gas and other difficult reservoirs to improve interpretation of the level of difficulty of oil and gas layers.The study area is typical low porosity and permeability reservoir,which has poor physical property,complex lithology characteristic and variable pore structure types.Also with high density and high salinity drilling mud system used in drilling,long drilling cycle and serious reservoir pollution,the array induction logging curves were made seriously distorted thus unable to be effectively used.First,for the study area characteristics,combined Logik interpretation platform HDIL resolution array induction module is pretreated to provide different vertical resolution curve of reservoir evaluation.At the same time for the mud invasion on array induction logs,the use of resistivity inversion technique,through vertical resolution that matches the logs radial deconvolution described radial variation of formation resistivity,fluid identification and reservoir evaluation invasion foundation.For thin,thin inter bedded using vertical resolution resistivity curve 1ft high capacity thin layered recognition.Ratios by low resistivity zone Recognition and true formation resistivity,low resistivity reservoirs effectively identify high formation water salinity caused.By the depth and resistivity change relations theory invasion from several aspects form array induction logging curves,numerical and radial relationships,analyze its role in the oil and gas well logging evaluation of the water layer,the establishment of array induction log data in reservoir evaluation mode of analysis,the qualitative identification of reservoir water level and flooding layers.Based on the above analysis,that fine by the inversion process,array induction curve played a certain correction.According to the results obtained by the inversion,take full advantage of high-resolution array induction logging in a thin layer,and thin inter bedded layers developed in the late flooding and other difficult applications reservoir to achieve better results.