[M-IS16] 地球掘削科学

[MIS16-P13] 大水深ライザー掘削でのカッティングスラグ深度の誤差推定：南海掘削Site C0002でのケーススタディ

*杉原 孝充¹ (1.海洋研究開発機構　地球深部探査センター)

キーワード：大水深掘削、カッティングス、泥水検層、ラグ深度

Drilling cutting is a unique tool to directly evaluate geological information in drilling hole, and precision and accuracy of cuttings lag depth are important for the geological evaluation to . During an actual operation, it is considered that mud water lag depth is the same as cuttings lag depth. However, since the cuttings lag depth obviously depends on size of cuttings, error of the cuttings lag depth should be independently evaluated as compared with the mud water lag depth. In this presentation, basic concept of the cuttings lag calculation is reviewed, and error of the cuttings lag depth is conceptually defined. As the result, potential of the cuttings evaluation is discussed showing quantitative result of the cuttings lag depth error.