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Implementation of a Petrographical and Petrophysical Workflow Protocol for Studying the Impact of Heterogeneity on the rock typing and Reservoir Quality of Reefal Limestone:A Case Study on the Nullipore Carbonates in the Gulf of Suez

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Acta Geologica Sinica(English Edition) 2021年第5期95卷 1746-1762页

作者： Mona G.SAFA Bassem S.NABAWY Ahmed M.K.BASAL Mohammad A.OMRAN Aref LASHIN Geology Department Faculty of ScienceDamietta UniversityNew Damietta CityEgypt Department of Geophysical Sciences National Research CentreDokkiCairoEgypt Petroleum and Natural Gas Engineering Department College of EngineeringKing Saud UniversityRiyadh 11421Saudi Arabia Benha University Faculty of ScienceGeology DepartmentBenhaEgypt

This study focuses on the heterogeneity of the middle Miocene syn-rift Belayim nullipore(reefal)marine sequences in the Gulf of Suez and its impacts on reservoir *** sequences consist of coralline algal reef limestones with a highly complex dual-porosity system of primary and secondary porosities of widely varying *** achieve a precise mathematical modeling of these reservoir sequences,a workflow protocol was applied to separate these sequences into a number of hydraulic flow units(HFUs)and reservoir rock types(RRTs).This has been achieved by conducting a conventional core analysis on the nullipore marine *** illustrate the heterogeneity of the nullipore reservoir,the Dykstra-Parsons coefficient(V)has been estimated(V=0.91),indicating an extremely heterogeneous reservoir.A slight to high anisotropy(λ_(k))has been assigned for the studied nullipore sequences.A stratigraphic modified Lorenz plot(SMLP)was applied to define the optimum number of HFUs and barriers/baffles in each of the studied *** the permeability-porosity,reservoir quality index-normalized porosity index(RQI-NPI)and the RQI-flow zone indicator(RQIFZI)plots,the discrete rock types(DRT)and the R35 techniques enable the discrimination of the reservoir sequences into 4 RRTs/*** RRT4 packstone samples are characterized by the best reservoir properties(moderate permeability anisotropy,with a good-to-fair reservoir quality index),whereas the RRT1 mudstone samples have the lowest flow and storage capacities,as well as the tightest reservoir quality.

关键词： reservoir heterogeneity nullipore rock typing hydraulic flow units Dykstra-Parsons coefficient stratigraphic modified Lorenz plot(SMLP)

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Investigating dynamic rock quality in two-phase flow systems using TEM-function: A comparative study of different rock typing indices

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Petroleum Research 2021年第1期6卷 16-25页

作者： Mohsen Faramarzi-Palangar Abouzar Mirzaei-Paiaman Institute of Petroleum Engineering School of Chemical EngineeringCollege of EngineeringUniversity of TehranTehranIran National Iranian South Oil Company(NISOC) Department of Petroleum EngineeringAhvazIran Now at State University of Campinas Sao PauloBrazil Pars Petro Zagros(PPZ)Company TehranIran

Constructing a reservoir simulation model requires an accurate definition of saturation functions,including capillary pressure and relative permeability ***,these saturation functions are available only for a limited number of *** saturation functions to the simulation model requires finding a clear relationship between them and a 3D predictable property of grid *** indices are usually evaluated to describe such a *** was recently shown that each petrophysical dynamic rock type should form similar True Effective Mobility(TEM)*** this study,TEMfunction was used to evaluate the reliability and performance of different rock typing indices in defining dynamic rock ***,FZIM,MFZI,and FZI*(FZI-star)indices were considered and tested on a collection of laboratory-derived core-flooding data from an Iranian carbonate *** showed that FZI-star had a better performance than FZI,MFZI,and FZIM.

关键词： TEM-function rock typing Relative permeability Capillary pressure FZI-star

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Formation evaluation and rock type classification of Asmari Formation based on petrophysical-petrographic data:A case study in one of super fields in Iran southwest

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Petroleum 2023年第2期9卷 143-165页

作者： Raeza Mirzaee Mahmoodabadi Sadegh Zahiri Department of Geology Estahban BranchIslamic Azad UniversityEstahbanIran National Iranian South Oil Company(NISOC) AhvazIran

The Oligo-Miocene Asmari Formation is one of the most important hydrocarbon reservoirs in the Middle *** oilfield under study is one of the largest oilfields in the Zagros basin with the Asmari Formation being the major reservoir *** this study,petrographic analyses,petrophysical data and neural network clustering techniques were used for identifying rock types in the Asmari *** analysis of the Asmari Formation in the study area has resulted in the definition of 1 clastic lithofacies and 14 carbonate microfacies *** petrophysical logs from 43 wells and their correlation with capillary pressure(Pc)curves,led to the recognition of 7 electrofacies(EF1-EF7).Microscopic evidence of Electrofacies group C1 and S1 show that the sedimentary facies of these electrofacies are most commonly found in restricted and shoal facies belts ***,petrographic studies show that the sedimentary facies of C2,C3,C4,S2 and S3 were formed in the open marine,Lagoon,and Tidal flat facies belt zone of homoclinal ramp sedimentary environment during the Oligo-Miocene based on relative sea level changes *** link between electrofacies and geological data indicated that both sedimentary and diagenetic processes controlled the reservoir quality of the Asmari ***,permeability and water saturation were used to estimate the reservoir quality of each *** 1 and 2 with high porosity and permeability,low water saturation is considered as the best reservoir with regard to sedimentary textures(dolowackestone and dolograinstone)and the effect of diagenetic processes such as dolomitization ***,growth framework and interparticle porosities are major in EF-2,while the intercrystalline porosity is the major type in *** 3 and 4 show low values of porosity,permeability and high percentage of water saturations,which characterizes them as poor reservoir ***,EF-5 is the only electrofacies in the siliciclastic parts of

关键词： Asmari formation Electrofacies Petrophysical log rock typing Zagros basin

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A new framework for selection of representative samples for special core analysis

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Petroleum Research 2020年第3期5卷 210-226页

作者： Abouzar Mirzaei-Paiaman Seyed Reza Asadolahpour Hadi Saboorian-Jooybari Zhangxin Chen Mehdi Ostadhassan National Iranian South Oil Company(NISOC) Department of Petroleum EngineeringAhvazIran Now at State University of Campinas(UNICAMP) CampinasSPBrazil Department of Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCanada Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development Ministry of EducationNortheast Petroleum University

Special core analysis(SCAL)measurements play a noteworthy role in reservoir *** to the time-consuming and costly character of these measurements,routine core analysis(RCAL)data should be inspected thoroughly to select a representative subset of samples for *** are no comprehensive guidelines on how representative samples should be *** this study,a new framework is presented for selection of representative samples for *** foundation of this framework is using methods of PSRTI,FZI*(FZI-star)and TEM-function for the early estimation of petrophysical static,dynamic,and pseudo-static rock types at RCAL *** global hydraulic element(GHE)approach is benefitted and a FZI*-based GHE method(i.e.,GHE*)is presented for partitioning *** framework takes into consideration different laboratory,reservoir engineering,geological,petrophysical and statistical factors.A carbonate reservoir case is presented to support our *** also show that the current forms of Lorenz and Stratigraphic Modified Lorenz Plots in reservoir engineering are not appropriate,and present new forms of them.

关键词： RCAL SCAL Sample selection rock typing TEM-Function

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