砂岩における多段階の流体の流れの年代測定
Darren F Mark1, John Parnell, Simon P Kelley
1Department of Geology and Petroleum Geology, Meston Building, Meston Walk, University of Aberdeen, Aberdeen, AB24-3UE, UK. d.mark@abdn.ac.uk
まとめ
この研究では,アルゴン-アルゴン年代測定法を使用して,堆積盆地の古流体を分析しました. それは,貯水池の石油充電イベントの正確な日付を指定し,数百万年にわたる流体進化を明らかにしました.
科学分野:
- 地質化学 地質化学
- 堆積地質学 堆積地質学とは
- イソトープジオクロノロジー
背景:
- パレオフリウイドの進化を理解することは,石油探査と盆地分析において極めて重要です.
- 堆積岩のカリウムフェルドスパートセメントは,過去流体の状態に関する貴重な情報を保存することができます.
研究 の 目的:
- 沈殿盆地内の古流体の温度-組成-時間データを決定する.
- 貯蔵庫内のオイルチャージと流体フローのイベントのタイミングを現在のところ.
主な方法:
- 紫外線レーザーによるアルゴン-アルゴン年代測定 カリウムフィールドスパートセメント.
- セメント内の流体インクルージョンの分析により,古流体組成と温度を決定する.
- 異なる流体流動エピソードを持つセメント相の相関.
主要な成果:
- パレオフリウイドの温度-組成-時間データは得られた.
- カリウムフェルドスパートセメントの異なる相は,進化する流体フローエピソードを記録した.
- パレオフリウイドは8300万年前,混合水と油の相から7600万年前には純粋な水相へと移行した.
結論:
- この研究では,堆積貯蔵庫の石油充填のタイミングを成功裏に日付付けました.
- この発見は,流域内のダイアゲネティックの歴史と炭化水素の移動に関する重要な洞察を提供します.
- この方法論は,堆積物系における古流体の歴史を再構築するための堅固なアプローチを提供します.
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