胜利油田不同类型油藏污染规律及对策探讨

Discussion the Damage Rules and Countermeasure of Different Type Reservoirs in Shengli Oilfield.

根据地层测试提供的表皮系数等参数 ,分析了胜利油田不同类型油藏从钻井到试油阶段的污染状况、主要污染原因及对策。指出不同类型的油气藏、因遭受污染损害的机理不同 ,其污染比例和程度也存在较大的差异。其中裂缝、孔洞发育的潜山油藏及火成岩油藏污染比例大、程度重 ,其次是高、中渗透砂岩油藏 ,而低渗透油藏污染比例小 ,程度轻。

According to the skin effect of well test analysis,the well damaged state can be divided into three type:the first,the buried hill reservoirs and the igneous reservoirs are sickly damaged;the second,the middle permeability sand reservoirs are damaged in some grade;the last,the low permeability reservoirs are slightly damaged.Since the reservoir types are different,the damaged mechanics and reasons are different also.The damaged grade is different in differ reservoirs.By using the well test data,the damage rules and countermeasure of different type reservoirs are given in this paper.