Relation ship between Physical Property and Deliverability:An Example from Changxing Bioreef-shoal Reservoir of Yuanba Area

In Yuanba area,the Changxing bioreef-shoal trap is mainly a lithological one and the physical property of Changxing reservoir is also the main effect on deliverability.An evaluation method for reservoir classification,combining physical-property parameters and mercury-injection parameters,is used in this study.Results show that Changxing bioreef-shoal reservoirs can be mainly divided into II type and III type,second for I type.In addition,the relationship between physical property and deliverability is analyzed,which demonstrates that deliverability becomes better along with physical property.It is indicated from formation test that:(1)III type reservoir is mainly a gas layer with low yield;(2) some commercial gas with middle yield can be obtained from II type reservoir;and(3)commercial gas with middle to high yield can be obtained from I type reservoir.