Indoor experiment results show that ABP has good yield,high thermal stability and good compatibility with treating agent of sea water drilling fluid,such as PAC 41,SK_Ⅱ.

Through testing submitted advantages of small diameter drilling in the complex strata, importance of stratigraphic pressure balancing, and some gists need pay attention in drilling of alluvium, and analyses centre on mud- made reason of Tertiary mud- made strata and optimization processing of mud capability, and summed different processing methods aimed at diff.

Principle component analysis method in evaluation of mud-making clay.;