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Record W2341218169 · doi:10.3124/segj.64.319

An optimization of depth conversion of seismic data by a geostatistical approach for an oil-sands development field in Alberta, Canada

2011· article· en· W2341218169 on OpenAlexaboutno aff
Tôru Nakayama, Masami Kose, Akihisa Takahashi

Bibliographic record

VenueBUTSURI-TANSA(Geophysical Exploration) · 2011
Typearticle
Languageen
FieldEngineering
TopicReservoir Engineering and Simulation Methods
Canadian institutionsnot available
Fundersnot available
KeywordsField (mathematics)Oil fieldGeologyPetroleum engineeringMathematics

Abstract

fetched live from OpenAlex

カナダのアルバータ州にあるオイルサンド貯留層の三次元地質モデル構築の際に,地球統計学の手法を応用して深度構造モデルの高精度化を図るとともに,地震波属性値記録の深度変換を実施した。構造モデルの構築では,オイルサンド貯留層の上面と基底面それぞれについて,水平方向のデータ密度が高い三次元地震探査の解釈ホライゾン(時間構造)と垂直方向のデータ精度の高い坑井深度の情報を地球統計学的な手法により調和的に統合して深度構造を推定した。オイルサンド貯留層の上面と基底面のそれぞれの時間構造と深度構造の情報に,さらにオイルサンド貯留層区間の地震波速度が水平方向に対しては変化するものの深度方向に対しては一定であると仮定すると,オイルサンド貯留層区間内の任意のデータサンプルの往復走時を深度に変換できる。この方法により,時間軸上の地震波属性値の情報を深度軸上の情報に変換することで,地震波属性値の深度ボリュームを作成した。本解析直後に対象地域内において5本の坑井が掘削された。地表からの深度約300mに存在するオイルサンド貯留層の上面と基底面について,掘削前の深度の予測値と掘削後に確認した深度の値とを比較したところ,その差は2m以下であった。その後,近隣の地域で取得した4つの三次元地震探査データにも本手法による深度変換が引き続き実施され,各地域の地下の三次元地質構造や岩相分布の推定に貢献した。

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.002
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.236
Threshold uncertainty score0.474

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.002
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0000.001
Bibliometrics0.0020.002
Science and technology studies0.0010.000
Scholarly communication0.0010.000
Open science0.0010.000
Research integrity0.0010.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.045
GPT teacher head0.258
Teacher spread0.212 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2011
Admission routes1
Has abstractyes

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