Research And Application Of Oil And Water Wells Plug Removal Technique In Sandstone Reservoirs Of The Wangguantun Oil Field

Acid izing is an important measure to improve production in oilfield. At present thistechnique has been widely used in oilfield. In connection with the midd le porosity andpermeability formation, highly viscous oil, contains more asphaltum, colloid and waxiness, alarge scale of dama ge during operation of drilling, completion and production aboutWANGGUANTUN oil field and , this paper presents the research of reservoir dama gemecha nism and types, the mecha nism of stimula tion, optimizing the acid fluid system,acid izing technology, optimizing the design and stimula tion evaluation. Through the researchof the reservoir characters and geology conditions and sensible evaluation experiment, theobjectivity of existing different kinds of potentia l dama ge factors was proven. The mecha nism,scope, types and degree of the dama ge had been researched ; developed a deep penetrability,weak corrosion and stabilizing the framewo rk reating fluid SJA-2 .and the long core plug isused in acid core floe testing for the evaluation; Trough the research of experiment and theimprovements of acid izing numerical simulation, the comprehensive and perfect mathematica lmodel of sandstone acid izing had been set up. And acid izing software sandstone reservoir hadbeen established. The result of ma ny calculations showed this software was reliable and theeresult was reasonable. This software can be used as sandstone acid izing design and simulatingacid izng process and forecasting productivity and optimizing the treatment parameter;Throughacid izing technology study formed different technology aiming at different reservoir anddifferent dama ge. Ultima tely formed a practica l sandstone reservoir Acid izingCountermeasures and matching technologies .