定向鑽孔

定向鑽孔（英語：directional drilling）是鑽孔在施工時，隨着深度的增加，變化鑽孔傾角，達到以設計的角度穿過目標層位^[1] 。定向鑽孔的施工技術複雜，設計前要有足夠的地質資料，如岩層厚度、深度、傾角、硬度變化等^[2] 。定向鑽井有以下幾個目的：增加儲層在鑽孔長度的暴露，和增加採收率。不能用垂直鑽孔施工地區，例如城鎮、湖泊或其他難以施工的地面。定向鑽孔能集中地表井口位置，減少工地干擾或鑽機移動、並增加經濟效益^[1]。例如，在一個海上鑽井平台，可鑽40口井或更多井。從而降低成本。鑽「洩壓井」可以釋放噴井管綫的壓力，然後鑽「減壓井」，將重質流體泵入以抑制噴井高壓^[3]。

參考文獻

^ ^1.0 ^1.1 "Development tendency of horizontal directional drilling". DC Solid control. 6 June 2013. Archived from the original on 8 July 2013
^ "Maersk drills longest well at Al Shadeen". The Gulf Times. 21 May 2008. Archived from the original on 14 February 2012. Retrieved 5 March 2012
^ Julia Cauble Smith (12 June 2010). "East Texas Oilfield". Handbook of Texas Online. Texas State Historical Association. Retrieved 23 September 2014

[”Development”-1] 1.0 ^1.1 "Development tendency of horizontal directional drilling". DC Solid control. 6 June 2013. Archived from the original on 8 July 2013

[”Maersk”-2] "Maersk drills longest well at Al Shadeen". The Gulf Times. 21 May 2008. Archived from the original on 14 February 2012. Retrieved 5 March 2012

[”-3] Julia Cauble Smith (12 June 2010). "East Texas Oilfield". Handbook of Texas Online. Texas State Historical Association. Retrieved 23 September 2014

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