摘要
2009年中国石油首次在该地区成功的钻成了井深6596m的中亚地区第一口最深的超深探井,并在5800-6596m发现了重要的油气层。该井的油气层地下温度为147℃以上、压力为135Mpa,钻井使用的泥浆密度高达2.43g/cm3。该井在钻井中解决了:(1)高温、高压下,盐膏层塑性流动引起的卡钻难题;(2)压力系数为2.35-2.36的盐水层的钻井安全问题;(3)147℃高温(5703m)、134-135Mpa高压(5841m)条件下2.29-2.43g/cm3高密度水基泥浆的稳定性维护;(4)5″尾管悬挂器与7″套管小间隙条件下下入与座挂安全;(5)超深井小井眼段使用钻头偏心扩眼问题;(6)高温、高压小井眼条件下测井;(7)小井眼、小井段、小间隙、超深条件下的固井等7项世界级工程难题,对于高温、高压、超深井钻探技术的发展,对于该地区高温、高压、超深环境下的油气藏的地质研究和开发都有十分重大的意义。
This paper focuses on the research and applied technology at the first extra-deep exploration well in centre Asia region,which is located in Fergana basin and operated by CNPC with a final depth of 6559m and a couple of pay zones in the interval of 5800-6596m were discovered in 2009.this extra deeper well borehole with a critical high temperature of 147 ℃ and high pressure of 135Mpa in the pay zone formation.Successful achievements in drilling engineering technical aspects include:(1)solutions to drilling string stuck caused by plastic flowing of gypsum and salt formation under the high pressure and high temperature environment.(2)Drilling safety of the bearing salt water formation with a pressure coefficient of 2.35-2.36.(3)Maintaining the stability of characteristic of water base mud with a density of 2.29-2.43 g/cm3 under borehole HTHP condition with a temperature of 147℃(at depth 5703m) and pressure of 134-135Mpa(at 5841m).(4)smoothly running in and set the 5″liner hanger at the designed depth inside of 7″casing with narrow annulus space.(5)Properly used by-centre bit to opening hole in slim phase of extra deep well.(6)Running wireline logging at the slim hole and high mud density and high temperature condition.(7)Qualify the cementing in a slim hole,short interval with narrow annulus space under extra deep well circumstance.
出处
《新疆石油天然气》
CAS
2011年第4期21-27,106,共7页
Xinjiang Oil & Gas
关键词
超深高温高压探井
富含盐层地层
高密度水基泥浆
高压油气层
extra deep exploration well wirth high temperature high pressure
salt-gypsum formation
heavy weight water base drilling fluid
high pressure hydrocarbon zone
