Grey association analysis is a useful method with multiple parameters

i.e. through integrating many dynamic and static parameters

such as micro-facies

production well affecting factor

and etc

to predict remaining oil distribution.Moreover

through the modifying weight coefficient's calculating method with multiple major factors

it is much easier to evaluate remaining oil distribution according to different reservoirs' characteristics. This method can be divided into three steps: first

static geology study; second

dynamic production analysis; and third

synthesis valuation with grey association analysis. With grey association analysis

it is available to evaluate remaining oil distribution on HB reservoir in Xijiang 30-2 oilfield and is consistent with the actual production data.