{"title":"伊拉克北部埃尔比勒省中始新世阿瓦纳地层的储层特征:整合露头和地下数据","authors":"Wrya J. Mamaseni, I. Asaad, A. Al‐Juboury","doi":"10.19111/bulletinofmre.1453586","DOIUrl":null,"url":null,"abstract":"The current work investigate the petrophysical characteristics of the Middle Eocene Avanah Formation in the Erbil Governorate using IP software to analyze the well data, integrated with the \n petrographic investigation of the formation in the nearest outcrop in the Gomaspan section. Well logging data revealed that the main lithology of the formation is limestone and dolostone while the lithology in the Gomaspan section is composed of limestone, dolomitic limestone, marly dolomitic limestone, and thin beds of shale. The lower dolomitic unit in the subsurface section of the formation is believed to be the most suitable reservoir unit due to good petrophysical characteristics including, low water saturation, high porous medium, and the presence of movable hydrocarbon. To measure porosities, a variety of well logging techniques were used in this study. The investigated formation was divided into Avanah dense (limestone unit) and Avanah porous (dolostone unit) based on their porous components. The petrographic study shows that most pore types of the formation are secondary and represented mainly by vuggy, moldic, intercrystalline, and fracture types. Most of the fractures in the upper limestone units are filled by calcite cement. The study claimed that the lower part of the formation (dolostone unit) in both sections is considered a good reservoir.","PeriodicalId":42748,"journal":{"name":"Bulletin of the Mineral Research and Exploration","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Reservoir characteristics of the middle Eocene Avanah Formation in Erbil governorate, northern Iraq: Integration of outcrop and subsurface data\",\"authors\":\"Wrya J. Mamaseni, I. Asaad, A. Al‐Juboury\",\"doi\":\"10.19111/bulletinofmre.1453586\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The current work investigate the petrophysical characteristics of the Middle Eocene Avanah Formation in the Erbil Governorate using IP software to analyze the well data, integrated with the \\n petrographic investigation of the formation in the nearest outcrop in the Gomaspan section. Well logging data revealed that the main lithology of the formation is limestone and dolostone while the lithology in the Gomaspan section is composed of limestone, dolomitic limestone, marly dolomitic limestone, and thin beds of shale. The lower dolomitic unit in the subsurface section of the formation is believed to be the most suitable reservoir unit due to good petrophysical characteristics including, low water saturation, high porous medium, and the presence of movable hydrocarbon. To measure porosities, a variety of well logging techniques were used in this study. The investigated formation was divided into Avanah dense (limestone unit) and Avanah porous (dolostone unit) based on their porous components. The petrographic study shows that most pore types of the formation are secondary and represented mainly by vuggy, moldic, intercrystalline, and fracture types. Most of the fractures in the upper limestone units are filled by calcite cement. The study claimed that the lower part of the formation (dolostone unit) in both sections is considered a good reservoir.\",\"PeriodicalId\":42748,\"journal\":{\"name\":\"Bulletin of the Mineral Research and Exploration\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.5000,\"publicationDate\":\"2024-03-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of the Mineral Research and Exploration\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.19111/bulletinofmre.1453586\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Mineral Research and Exploration","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.19111/bulletinofmre.1453586","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
本研究使用 IP 软件分析测井数据,并结合对最近出露的 Gomaspan 段地层的岩相学调查,对埃尔比勒省中始新世阿瓦纳地层的岩石物理特征进行了研究。测井数据显示,地层的主要岩性为石灰岩和白云石,而 Gomaspan 段的岩性由石灰岩、白云质石灰岩、泥灰质白云质石灰岩和薄层页岩组成。由于具有良好的岩石物理特征,包括低水饱和度、高孔隙介质和可移动碳氢化合物的存在,该地层地下段的下白云质单元被认为是最合适的储层单元。为了测量孔隙度,本研究采用了多种测井技术。所调查的地层根据其多孔成分分为阿瓦纳致密地层(石灰岩单元)和阿瓦纳多孔地层(白云石单元)。岩相学研究表明,该地层的大多数孔隙类型都是次生孔隙,主要表现为泡状、模状、晶间和断裂类型。上部石灰岩单元的大多数裂缝都由方解石胶结物填充。研究认为,这两个地段的地层下部(白云石单元)是一个良好的储层。
Reservoir characteristics of the middle Eocene Avanah Formation in Erbil governorate, northern Iraq: Integration of outcrop and subsurface data
The current work investigate the petrophysical characteristics of the Middle Eocene Avanah Formation in the Erbil Governorate using IP software to analyze the well data, integrated with the
petrographic investigation of the formation in the nearest outcrop in the Gomaspan section. Well logging data revealed that the main lithology of the formation is limestone and dolostone while the lithology in the Gomaspan section is composed of limestone, dolomitic limestone, marly dolomitic limestone, and thin beds of shale. The lower dolomitic unit in the subsurface section of the formation is believed to be the most suitable reservoir unit due to good petrophysical characteristics including, low water saturation, high porous medium, and the presence of movable hydrocarbon. To measure porosities, a variety of well logging techniques were used in this study. The investigated formation was divided into Avanah dense (limestone unit) and Avanah porous (dolostone unit) based on their porous components. The petrographic study shows that most pore types of the formation are secondary and represented mainly by vuggy, moldic, intercrystalline, and fracture types. Most of the fractures in the upper limestone units are filled by calcite cement. The study claimed that the lower part of the formation (dolostone unit) in both sections is considered a good reservoir.
期刊介绍:
MTA Dergisinde, yer bilimlerinin her dalına ilişkin özgün bilimsel araştırmalara, eleştirel derlemelere, kısa notlara ve yayımlanmış makalelere ilişkin eleştiri ve yanıt yazılarına yer verilmektedir. Dergi, yılda iki kez Türkçe ve İngilizce olarak yayımlanmaktadır. Dergiye yayınlanmak üzere gönderilen makalelerden makale kabul ücreti, makale işlem ücreti ve basım ücreti alınmamaktadır. MTA Dergisine gönderilen makaleler Yayın Kurulu tarafından intihal.net aracılığıyla intihal taramasından geçirilir. İntihal veya kendinden çalma tespit edilen makaleler dergi tarafından reddedilir. MTA Dergisi, tamamen açık erişim dergisi olarak yayınlanmaktadır. Dergideki makalelerin tam metin içeriğine internet üzerinden ücretsiz olarak erişilebilmektedir. Herhangi bir ortamda ticari olmayan kullanımına ve dağıtımına izin verilmektedir, yazarın ve derginin düzenli olarak atıf almasına imkân sağlamaktadır.