In the oil industry measured depth (commonly referred to as MD, or just the depth) is the length of the drilled borehole. In conventional vertical wells, this coincides with the true vertical depth, but in directional or wells, especially those using extended reach drilling, the two can deviate greatly. For example, at the time of writing (2012) a borehole in Odoptu field, Sakhalin-I, has the greatest measured depth of any borehole at 12,345 m, but most of this is horizontal, giving it a true vertical depth of only 1,784 m. For comparison, the Kola Superdeep Borehole has a slightly shorter measured depth at 12,262 m, but since this is a vertical borehole, this is also equal to the true vertical depth, making the Kola Superdeep Borehole deeper by a factor of 6.9.
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| - Measured depth (en)
- 井深 (zh)
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| - In the oil industry measured depth (commonly referred to as MD, or just the depth) is the length of the drilled borehole. In conventional vertical wells, this coincides with the true vertical depth, but in directional or wells, especially those using extended reach drilling, the two can deviate greatly. For example, at the time of writing (2012) a borehole in Odoptu field, Sakhalin-I, has the greatest measured depth of any borehole at 12,345 m, but most of this is horizontal, giving it a true vertical depth of only 1,784 m. For comparison, the Kola Superdeep Borehole has a slightly shorter measured depth at 12,262 m, but since this is a vertical borehole, this is also equal to the true vertical depth, making the Kola Superdeep Borehole deeper by a factor of 6.9. (en)
- 在石油工业中，测量井深（简称井深，MD，英語：Measured depth，或深度）是的深度。 在传统的中，井深与恰好相等。但在和中，井深和垂深有所不同。 例如，2008年5月在卡塔尔近海完成的BD-04A井，测量井深12 297.6米，是当时世界最深井。其水平位移11092.5米，垂深仅为1054.64米。 2012年时世界最深井，库页岛近海Odoptu OP-11号井的井深为12,345米，但由于绝大部分为水平段，其垂深仅为1,784米。 科拉超深钻孔的井深为12,262米，稍浅于前者；但由于它是垂直井，垂深与井深相等，因此其垂深是库页岛OP-11井的6.9倍。 (zh)
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| - In the oil industry measured depth (commonly referred to as MD, or just the depth) is the length of the drilled borehole. In conventional vertical wells, this coincides with the true vertical depth, but in directional or wells, especially those using extended reach drilling, the two can deviate greatly. For example, at the time of writing (2012) a borehole in Odoptu field, Sakhalin-I, has the greatest measured depth of any borehole at 12,345 m, but most of this is horizontal, giving it a true vertical depth of only 1,784 m. For comparison, the Kola Superdeep Borehole has a slightly shorter measured depth at 12,262 m, but since this is a vertical borehole, this is also equal to the true vertical depth, making the Kola Superdeep Borehole deeper by a factor of 6.9. (en)
- 在石油工业中，测量井深（简称井深，MD，英語：Measured depth，或深度）是的深度。 在传统的中，井深与恰好相等。但在和中，井深和垂深有所不同。 例如，2008年5月在卡塔尔近海完成的BD-04A井，测量井深12 297.6米，是当时世界最深井。其水平位移11092.5米，垂深仅为1054.64米。 2012年时世界最深井，库页岛近海Odoptu OP-11号井的井深为12,345米，但由于绝大部分为水平段，其垂深仅为1,784米。 科拉超深钻孔的井深为12,262米，稍浅于前者；但由于它是垂直井，垂深与井深相等，因此其垂深是库页岛OP-11井的6.9倍。 (zh)
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