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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 认领 引用 被引量：2
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作者 Mona G.SAFA Bassem S.NABAWY +2 位作者 Ahmed M.K.BASAL Mohammad A.OMRAN Aref LASHIN 《Acta Geologica Sinica(English Edition)》 SCIE EI CAS CSCD 2021年第5期1746-1762,共17页
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 quality.The sequences consist of coralline algal reef l... 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 quality.The sequences consist of coralline algal reef limestones with a highly complex dual-porosity system of primary and secondary porosities of widely varying percentages.To 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 sequence.To 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(λk)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 wells.Integrating 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/HFUs.The 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. 展开更多
关键词 reservoir heterogeneity nullipore rock typing hydraulic flow units Dykstra-Parsons coefficient stratigraphic modified Lorenz plot(SMLP)
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一种描述岩礁储集层次生孔隙度的综合方法 认领 引用
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作者 HaniElshahawi 宋丹 《测井与射孔》 2002年第1期43-51,共9页
Nullipore油田位于埃及苏伊士海湾，是稠油岩礁油藏，它属于Bakr-Amer油田的一部分。与大多数岩焦油藏相似，Nullipore有复杂的双重介质孔隙体系，其中原始孔隙和次生孔隙占有很大的比例，次生孔隙包括数量不确定的空洞，印模和裂缝。... Nullipore油田位于埃及苏伊士海湾，是稠油岩礁油藏，它属于Bakr-Amer油田的一部分。与大多数岩焦油藏相似，Nullipore有复杂的双重介质孔隙体系，其中原始孔隙和次生孔隙占有很大的比例，次生孔隙包括数量不确定的空洞，印模和裂缝。通过常规测井系列对储层岩物理性质及非均质性质进行了岩性物理评价。由于储层原油粘度高，探测困难，实际可采储量少，传统上认为Nullipore油田属备用油田。最近，利用改进的测井技术既可以更好的次生孔隙度有进一步的了解。根据新获得的资料，新的水平井已完井，利用新钻水平井获得的数据使老井得以重新完井，使油田的产量大幅度提高。文章描述了探测天然裂缝和双孔隙度的方法，二者与Nullipore油田产量有关。该方法的关键是裂缝探测测井和孔隙模型的使用。 展开更多
关键词 油藏描述 岩礁储集层 次生孔隙度 综合方法 岩层 Nullipore油田
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