Osamu Takano
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View article: Depositional Ages, Sequence Stratigraphy and Transition Process of Forearc Setting From Paleogene Restricted Bay/Estuarine to Neogene Open‐Marine Deltaic/Slope Systems in the Sanriku‐Oki Forearc Basin, Northeast Japan
Depositional Ages, Sequence Stratigraphy and Transition Process of Forearc Setting From Paleogene Restricted Bay/Estuarine to Neogene Open‐Marine Deltaic/Slope Systems in the Sanriku‐Oki Forearc Basin, Northeast Japan Open
This paper aims to discuss the transition process of the forearc basin setting along the Northeast Japan arc, based on the results of strontium isotope dating, resistivity image facies analysis, sequence stratigraphic and depositional syst…
View article: Recent development of sedimentological approaches in petroleum exploration and development technology
Recent development of sedimentological approaches in petroleum exploration and development technology Open
1992年頃から2017年頃の間の，本邦における「石油探鉱開発技術にかかる堆積学関連手法の進展」を概観した．この期間における石油探鉱開発技術にかかる堆積学的手法の進展で特筆できるものとして，シーケンス層序学の導入と実適用，三次元地震探査データを用いた震探地形学の進展と適用，貯留層堆積モデルの精密化・高度化，三次元地質/貯留層モデリング技術の進展，石油システムの概念に基づく堆積盆解析の視点の拡大，非在来型炭化水素資源開発にかかる珪質岩堆積学およびメタンハイドレート貯留層分布・…
View article: 3-D seismic geomorphological analysis of channels and mass transport deposits in the Joetsu buried submarine canyons and the flanks of the Umitaka Spur, southeastern Toyama Trough, central Japan
3-D seismic geomorphological analysis of channels and mass transport deposits in the Joetsu buried submarine canyons and the flanks of the Umitaka Spur, southeastern Toyama Trough, central Japan Open
富山トラフ南東部,海鷹海脚周辺の上部第四系を対象として,三次元地震探査データのサイスミック地形学解析を実施した.その結果,上越埋没海底谷群内において,通常のチャネル流下方向とは異なる,海脚斜面部からの突発的側方流入堆積体が,海鷹海脚西側斜面下において,マウンド状を示す土石流堆積体および斜面ガリー起源の線状配列堆積体が認められた.これらの特徴的堆積物は,後期更新世における氷河性海水準変動に起因するメタンハイドレートの分解とポックマークの形成に伴う斜面崩壊やガリー形成に関連して…
View article: Geostatistical sediment body modeling: Principles, methods and linkage to sedimentology
Geostatistical sediment body modeling: Principles, methods and linkage to sedimentology Open
本総説では，地球統計学的堆積体モデリングの基本概念と手法のバリエーションをまとめ，近年の方向性を指摘した．地球統計学は，自然界における様々な現象の空間的，時間的な関連性をモデル化して推定を行う統計学であり，石油探鉱開発をはじめとして様々な分野において活用されている．地球統計学を用いた堆積体のモデリングである「地球統計学的堆積体モデリング」の手法として，ピクセルベース二点間法のほか，ピクセルベース多点間法，オブジェクトベース，プロセス支援，サーフェスベース，堆積プロセスベース…
View article: Petroleum source rock potentials and depositional sequences in coal-bearing formations of the Eocene Ishikari Group, Hokkaido, Japan
Petroleum source rock potentials and depositional sequences in coal-bearing formations of the Eocene Ishikari Group, Hokkaido, Japan Open
The coal-bearing formations of the Eocene Ishikari Group, Hokkaido, Japan, are supposed to be the petroleum source rock strata for the Yufutsu Field, Hokkaido, Japan. Geochemical and sedimentological analyses were performed for the Ishikar…
View article: New <i>Chikyu</i> Shallow Core Program (SCORE): exploring mass transport deposits and the subseafloor biosphere off Cape Erimo, northern Japan
New <i>Chikyu</i> Shallow Core Program (SCORE): exploring mass transport deposits and the subseafloor biosphere off Cape Erimo, northern Japan Open
The Chikyu Shallow Core Program (SCORE) has been started to provide more opportunities for the scientific ocean drilling of shallow boreholes (up to 100 m) during a short-term expedition. The proposal flow is a simplified version of that o…
View article: North Fossa Magna as the major sediment supply system to the Toyama Deep-sea Channel
North Fossa Magna as the major sediment supply system to the Toyama Deep-sea Channel Open
東北日本弧と西南日本弧の境界ゾーンに属する北部フォッサマグナ信越堆積盆と富山トラフとの関連を後期新生代堆積テクトニクス史と砕屑物供給系の観点から検討した.信越堆積盆は東北日本弧型の堆積盆テクトニクス履歴を示すのに対し,頸城沖~富山トラフは西南日本内帯型の履歴を示す.堆積環境・堆積プロセス復元結果プロット,地震探査データ解析,砂岩組成解析の結果は,13~3Ma間には,北東-南西方向のトラフとその間をつなぐ海底扇状地によるステップ状供給パターンにより,信越堆積盆から富山トラフへ…
View article: Potential evaluation of Onnagawa tight oil by basin modeling
Potential evaluation of Onnagawa tight oil by basin modeling Open
The Miocene Onnagawa Formation, lithologically similar to the Monterey Formation, mainly consists of siliceous rocks, which are known as the main source rock in the Akita area, northern Japan. In the Yurihara-Ayukawa conventional oil and g…
View article: Depositional systems and petroleum geology of the Middle–Late Miocene foreland basin deposits in the Hidaka coast area, central Hokkaido, Japan
Depositional systems and petroleum geology of the Middle–Late Miocene foreland basin deposits in the Hidaka coast area, central Hokkaido, Japan Open
前期中新世末期~中期中新世の北海道中央部では,島弧–島弧衝突により南北約400km,幅数10kmにわたる地域に狭長な前縁盆地群(foreland basins)が形成された.これら前縁盆地群の埋積層に対しては,これまでに多くの堆積学的な研究が行われてきた.このうち前縁盆地群南部を構成する日高堆積盆の埋積層は,陸上分布(日高海岸地域)および沖合延長部(日高沖)ともに石油胚胎の期待が高まっている.
View article: Reservoir rock risk assessment based on the optimized integration of geological/sedimentological constraint information and quantitative modeling methods
Reservoir rock risk assessment based on the optimized integration of geological/sedimentological constraint information and quantitative modeling methods Open
This paper attempts to review effective methodology for evaluating geologic risks in the distributions and properties of petroleum system-related sediments, mainly focusing on reservoir/source rocks and migration carrier beds. Since geolog…
View article: Intermittent Formation, Sedimentation and Deformation History of Cenozoic Forearc Basins along the Northwestern Pacific Margins as an Indicator of Tectonic Scenarios
Intermittent Formation, Sedimentation and Deformation History of Cenozoic Forearc Basins along the Northwestern Pacific Margins as an Indicator of Tectonic Scenarios Open
This chapter examines the basin-filling stratigraphy and major unconformity events of the Cenozoic forearc basins in the NE Japan, SW Japan, Ryukyu and Izu-Bonin forearc territories along the northwestern Pacific margins to obtain informat…
View article: Tectonic Synthesis: A Plate Reconstruction Model of the NW Pacific Region Since 100 Ma
Tectonic Synthesis: A Plate Reconstruction Model of the NW Pacific Region Since 100 Ma Open
Based on the results of interdisciplinary study from Chapters 1–4, a plate tectonic model of the northwestern Pacific region since 100 Ma is presented in this chapter. The evolution of the Pacific margin is viewed as a longstanding history…
View article: Submarine fan turbidites as hydrocarbon reservoirs:
Submarine fan turbidites as hydrocarbon reservoirs: Open
This paper comprehensively reviews recently discussed sedimentological and petroleum geological topics on submarine-fan turbidites as the major hydrocarbon reservoir rocks of the world. After the proposals of primary basic submarine-fan mo…