Study On Logging Evaluation And Sedimentary Microfacies Of Shen 150-161 Block

Shen 150-161 well area was found in 1980 s, after years of exploration, the production level is low, the comprehensive water content is 70%, and the water injection is difficult,formation energy decreases, the physical characteristic deteriorates, remaining oil distribution complex. Therefore, it is necessary to re-evaluate the logging evaluation and sedimentary micro facies research, begin to carry on the comprehensive evaluation of reservoir and carry out the distribution of oil layer, and provide basic geological information for next step exploration and development.The research bases on core, logging, well logging, seismic, oil test data, establishes the high-resolution sequence stratigraphic framework, bases on " cycle based, strata control, level3 contrast, subdivision step by step " methods, the sand three groups are subdivided into seven oil groups, thirty-eight sand groups and ninety-one small layers; on this basis, combining with single well facies, log facies and spectral decomposition properties of seismic facies, bases on the principle of "well point phasing, attribute groups form" map the sedimentary microfacies,determine the sedimentary period of the sand three two stage is the fan delta plain sub facies,and the three three stage is the fan delta front sub facies.At the same time, on the basis of high-resolution sequence division, make a study of the "four-property" of well logging, set up the mud, porosity, permeability, oil saturation logging interpretation model, set up the standard of effective thickness of oil and water layer logging response. use the four parameters that are drilling rate, reservoir thickness, reservoir porosity,permeability to complete the reservoir comprehensive evaluation, divide into three types of reservoir, finally study the characteristics of reservoir distribution.