1. First-Ever Safe Drilling Achievements

First accident-free well in 20 years on Southern Junggar Margin — Xi5 (2001)

First safe, shortest-cycle well in 15 years in Tarim YT–Quele belt — YT5-2 (2002)

First accident-free well in Eastern Junggar Santai area — T51 (2003)

First accident-free well in Huabei Gaojiabao structure — Jia59 (2003)

First horizontal well in Northern Santai, Junggar — BHW01 (2008)

First trouble-free well in Indonesia Madura Field — Madederop-1 (2010)

2. Deep & HPHT Well Records

Deepest well in Huabei Oilfield — Niudong-1: 6027 m, BHT 201℃ (2011)

Longest salt/anhydrite interval drilled — Keshen208: 3026 m (2012)

Deepest 22” hole section in China — Keshen-6: 3039 m (2013)

Deepest well in Qinghai Oilfield — Kun-2: 7100 m, 195℃, 1.80 SG (2017)

Highest-temperature well in Qinghai — Yantan-1: 210℃, 5999 m (2017)

Highest-temperature well in Qaidam — Yitan-1: 240℃, 6500 m (2019)

Deepest well in 64 years of Qinghai E&P — Kun 1-1: 7310 m, 196℃, 140 MPa (2019)

Highest WBM temperature record in Daqing — Gulong-2: 200℃ (2021)

Deepest well in Huabei — Batang-1: 7162 m (2024)

Deepest 333.4 mm openhole in Eastern China — Mengtan-1: 7921 m (2025)

3. Horizontal Drilling – National & Asian Records

China’s longest horizontal section (2011) — Su53-82-46H: 2111 m

China’s longest land horizontal section (2019) — Hua H50-7: 4088 m

National horizontal section record (2020) — Jing50-26H1: 4118 m

National deep-horizontal/longest section (2020) — Tao2-33-8H2: 4466 m

Asian onshore longest horizontal section — Hua H90-3: 5060 m (2021)

Asian largest onshore horizontal well platform — Hua H100 Platform: 31 wells (2021)

Asian longest onshore section (updated) — Jing51-29H1: 5256 m (2021)

Qinghai’s longest horizontal section — Fengxi IH2-5: 2537 m (2021)

Qinghai horizontal single-run footage record — Fengxi IH1-5: 1566 m (2021)

4. Drilling Speed / ROP Performance

Record fracturing BHP in Sichuan carbonate — Jianmen-1: 207 MPa (2008)

Fastest drilling in Dagang offshore — Zhuanghai 8Es-H10: 13.42 days (2011)

Highest daily ROP in 17-1/2” hole — Keshen 2-1-4: 856.2 m/day (2013)

Deepest/fastest 17-1/2” section in China — Keshen 2-1-14 (5541 m in 90 days, 2013)

Fastest 5-string structure drilling in Kuqa Front — Keshen 2-1-14: 6948 m in 199 days (2013)

Mahu18 highest single-run build-section ROP — MaHW6203: 861 m/run (2018)

Mahu deepest horizontal well — MaHW6203: 6130 m (2018)

Mahu fastest well construction — MaHW1250: 46.5 days (2018)

Qinghai fastest horizontal drilling cycle — Chaiping-4 (2022)

A well in the Kuqa piedmont area of the Tarim Oilfield

5. CNOOC / South China Sea Records (WZ Series)

Shortest cycle for 2000–2500 m horizontal wells — WZ12-8W-A4H: 4.38 days (2013)

Shortest cycle for 2501–3000 m horizontal wells — WZ12-8W-A5H: 5.0 days (2013)

Shortest cycle for 4001–4500 m directional wells — WZ6-12-A9: 17.48 days (2013)

Shortest cycle for 4501–5000 m directional wells — WZ6-12-A8: 18.02 days (2013)

Shortest cycle for 4000–4500 m horizontal wells — WZ6-12-A10H: 14.17 days (2013)

6. International Landmark Projects

First trouble-free well in Indonesia Madura — Madederop-1 (2010)

Belt & Road flagship well in Uzbekistan — Ming-15: 5918 m, 180℃, 2.30 SG

   – Deepest large-diameter casing setting (overseas CNPC record)

   – Longest sealed/cemented interval

          

Rig of Well Ming-15 in Mingbulak Oilfield

 7. Additional Reservoir Productivity Records

First Paleogene oil discovery in Junggar Basin history — Tai402: 10-m oil interval (2007)

Santai Area (Eastern Junggar): WEIGH perforate-and-flow vs. polymer perforate-and-frac — WEIGH system increased productivity by 2.8× (2007)

Highest-producing well in Junggar over a 5-year period — BHW01: 522 m³/d oil (2008)

Dagang Offshore: Horizontal WEIGH reservoir drilling campaign — Average production uplift of ×5.7 across 5 wells — Average uplift of ×4.5 across 32 wells (2010)

Highest oil well productivity in 33 years of Huabei Oilfield — Niudong-1: 649 t/d oil and 560,000 m³/d gas (2011)

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