关键词: 碳酸盐岩, 开发评价, 数值模拟, 采收率, 任丘油田

Abstract: The Renqui Oil field possesses the biggest carbonate reservoirs in China.The high recovery efficiency had been obtained during its major development stage,the depletion and cyclic water flooding development was carried out on its two reservoirs since the beginning of later development stage.The lease experiment has been lasted for six years.This paper presents a reservoir simulation technique to calculate single kind of measurement planning,from which each kind of measurement was decomposed.The main objective of the study was to evaluate the affectation of the unsteady water flooding to increase production of the Renqiu Field.The result indicated that,additional oil production by the depletion and cyclic water flooding is less than overall additional oil production by all kinds of stimulation and adjustment wells,even adjustment wells play an important role in increasing production.Unsteady water flooding cannot be replaced by the other stimulation and adjustment wells in the matter of EOR.It is feasible that unsteady water flooding might be used to carbonation reservoir in later development stage.

Key words: carbonatite, development evaluation, numerical simulation, oil recovery, Renqiu Oil Field