CAJ | 학술논문

分析了华北油田冀中坳陷深潜山的钻探难题,即井壁垮塌、卡钻、漏失、机械钻速慢、井斜等.塌漏并存问题可采用优化井身结构、对漏层专层专打、利用低密度白油包水钻井液体系进行欠平衡钻井等方法解决.针对不同漏失类型制定了相应的堵漏措施,并在现场得到了成功应用.针对潜山寒武系泥岩和第三系地层的特点,可采用低密度水包油钻井液、高密度油包水钻井液和抑制性较强的聚硅氟钻井液体系钻进.为同类地层钻探提供了参考.
분석료화북유전기중요함심잠산적찬탐난제,즉정벽과탑、잡찬、루실、궤계찬속만、정사등.탑루병존문제가채용우화정신결구、대루층전층전타、이용저밀도백유포수찬정액체계진행흠평형찬정등방법해결.침대불동루실류형제정료상응적도루조시,병재현장득도료성공응용.침대잠산한무계니암화제삼계지층적특점,가채용저밀도수포유찬정액、고밀도유포수찬정액화억제성교강적취규불찬정액체계찬진.위동류지층찬탐제공료삼고.
Drilling difficulties in deep buried hill wells in Jizhong depression of Huabei Oilfield mainly behave as wall crash down, bit freezing, leak off, low drilling rate, well deviation, and so on. To solve the problem of leak and crash down coexisting, different settlements were adopted, such as well structure optimization, special drilling for certain leaking layer, under-balanced drilling with low density water-in- white oil drilling fluid system, etc. Different sealing measures were taken for various types of leak type and they were successfully applied in the oilfield practice. Considering the features of mudstone in buried hill in Cambrian and the formation of Tertiary, low density water-in-oil drilling fluid, high density oil-in-water drilling fluid and poly-silicon fluoride drilling fluid system with strong rejection capability can be used.