実坑井データを用いた傾斜坑井の掘屑運搬挙動と等価循環泥水比重のシミュレーション
スポンサーリンク
概要
- 論文の詳細を見る
Cuttings transport and management of equivalent circulating density (ECD) are the key issues in designing and drilling extended-reach and directional wells.In this paper, a simulation study on cuttings transport and ECD behavior was carried out by use of field data for highly inclined directional well "Numanohata Higashi (T1) SK-1aD" drilled in Hokkaido, Japan. As a result of simulation study, it was demonstrated that ECD was fluctuated in accordance with drilling history that drilling and mud circulation were alternately repeated. The manner ECD fluctuated was as follows. In the well with short low inclined hole section in which cuttings deposit bed was hardly formed, ECD was increased with increase of cuttings concentration in mud during drilling and was decreased with decrease of cuttings concentration during mud circulation. In the well with long highly inclined hole section, ECD was increased with increase of cuttings deposit bed during drilling and was decreased with decrease of cuttings deposit bed during mud circulation. However, even in the well with long highly inclined hole section, ECD fluctuation was small under the condition that cuttings deposit bed was hardly formed.In addition, optimization study on drilling condition was conducted and the following results were obtained. In consideration of cuttings transport, the optimum mud flowrate existed so that ECD was minimized and the optimum flowrate was small for mud with high YP (yield point) or initial gel strength. Mud with high YP or initial gel strength was preferred for good hole cleaning and mud with low YP or initial gel strength was preferred when ECD should be kept lowered even though some amount of cuttings deposit bed were formed.
- 石油技術協会の論文
石油技術協会 | 論文
- 地震波シミュレーションが地下構造探査に果たす役割
- インバージョンテクトニクス
- 最近の探鉱プレイへの構造形成モデルの貢献
- 堆積盆地の地史情報に基づく沈降モデルと構造形成--日本海東部と中国北部湾を例にして (第55回石油技術協会総会地質・探鉱部門シンポジウム--堆積盆地評価とその応用)
- 東北裏日本海域における石油の生成と移動の時期 (「石油の生成と移動の時期」シンポジウム特集号)