Motion pattern of bottom water of burial hill dense oil pool and matching water blockage technique

In combination with lithological characters of crevice reservoir in the burial hill pool of dense oil,the motion pat- tern of bottom water in X1 block is analyzed,and the com- patibility between the grain size of blockage agent and the o- pening of reservoir crevice is studied.The composite applica- tion of grain and gelatin blockage agent and blockage tech- niques as single blockage,double- section blockage and three- section blockage of high dose are selected to plug off bottom water.Since 2002,the annual output of crude oil has been raised,the overall water content has decreased in suc- cessive three years after the application of the composite techniques for 135 times.The laboratory tests and the appli- cation effect show that the suggested matching blockage technique can meet the need of blockage for the dense oil pool with abundant bottom water and crevices.