定向鑽孔
定向鑽孔(英語:) 是钻孔在施工時,随着深度的增加,变化钻孔倾角,達到以設計的角度穿过目標層位[1] 。定向鑽孔的施工技术复杂,设计前要有足够的地质资料,如岩层厚度、深度、倾角、硬度变化等[2] 。定向鑽井有以下幾個目的:增加儲層在钻孔長度的暴露,和增加采收率。不能用垂直钻孔施工地區,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,在一個海上钻井平台,可钻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
- "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
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