摘要
为保证复杂探井的顺利钻进,更好地保护油气层,在钻前进行地层3项压力(地层孔隙压力、坍塌压力和破裂压力)剖面的预测非常重要。利用邻井测井资料、钻井工程资料对大港油田南大港潜山构造带歧南9X1、歧南9X2等井,在钻前进行了地层3项压力预测。根据该地区进入油气层段前地层坍塌压力较高,而进入油气层后地层坍塌压力下降,同时油层孔隙压力较低的实际情况,采用了一套与传统井身结构设计完全不同的设计方式,虽然增加了一定的套管成本,却保证了钻井施工的顺利进行,有效保护了油气层,与邻井相比,产量大幅度提高。
In order to protect easy drilling,protect reservoir,it is important to forecast pore pressure,caving pressure and breakdown pressure.Predict those pressure with logging data of adjacent well and drilling engineering data,using method of Eaton to predict pore pressure,stretch break norm to predict breakdown pressure,mole-coulomb norm to predict caving pressure.Predicted pressure of Qi'na N9X1 well and 9X2 well,designed a suit of hole structure different from traditional hole structure,it has increase some casing cost,but it guaranteed successful drilling and protect reservoir,advanced outcome of oil.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2005年第B06期1-3,共3页
Oil Drilling & Production Technology
关键词
大港油田
钻探
孔隙压力
破裂压力
坍塌压力
预测
Dagang Oilfield pore pressure breakdown pressure caving pressure Exploration drilling
