Waterflooding development effect evaluation of sandy conglomerate bottom water oil reservoir of Lei 64faulted-block

Lei 64 faulted-block is a huge massive block of sandy conglomerate bottom water thin oil reservoir.Bottom water injection development was adopted and a high level production under low water content has always been maintained. For the past few years,however,due to gravity drainage,the energy declined,and then the bottom water injection can not effectively replenish the upper formation energy,the block pressure dropped and presented sharply declined speed.Through reservoir characteristics analysis,water injection dynamic characteristics analysis and water injection effect evaluation,a reasonable development manner has been provided.