高温高压油井套管下放波动压力研究

Research on Surge Pressure of Casing Running in H igh- Temperature H igh- Pressure Oil Well

( 1 长江大学钻井研究所, 湖北荆州434023; 2 中海油田服务有限公司油田生产服务事业部, 天津300452;

3 中原油田分公司油气技术管理部, 河南濮阳457001)

Fluctuation pressure is the m ain cause that destroys the
ba lance o f w ell pressure and tha t results in w ell blowout,
leakage, co llapse and othe r com plex acc iden ts. The
pred iction and app lication o f fluc tuation pressure play a very
im po rtant ro le in drilling eng ineer. Dur ing runn ing casing, it
behaves as exc iting pressure. The used m e thod about
contro lling the fluc tuation pressure is the contro l o f the w ell
running cas ing speed, w hich accom plishes the fu ll - term
ba lance pressure cem ent. It pro tects the leakage fo rma tion
and the w eek forma tion. A lthough the dynam ic com putationa l
m ethod can accurately ca lcu late the surge pressure of bo ttom
ho le, the stable- statem e thod ism uch m ore suited for actua l
eng inee ring ca lculation in v iew of secur ity.