J采液指数 rest /(pr-p wrest wrest qt test (I-fwlpr- pb++f (pr-pwffest ) l 1.8 A=1-0.2( wrest )-0.8( wftest 第二节\第八章( ) qtest pR pwftest J = − ( )] 1.8 (1 )[ w R wftest b w R b test f p p p A f p p q J − − + + − = pwftest  pb 2 1 0.2( ) 0.8( ) b wftest b wftest p p p p A = − − J——采液指数