阿南油田低渗油藏储层伤害分析

An Analysis of the Formation Damage in A-Nan Low Permeability Reservoir

目前国内外许多油田都在开展储层伤害研究工作，这项研究对于低渗透油田尤为重要。在分析生产动态和岩心分析基础上，对阿南低渗透砂岩油藏开发过程中的储层伤害做了较为深入的研究。认为目前主要的储层伤害因素有：原油中石蜡析出造成油井井底附近地层渗透性下降；注入水水质差引起注水井近井地带的储层伤害；颗粒运移主要造成地层深部伤害及细菌堵塞、地层敏感性伤害等。

Formation damage research is very important to the development of low permeability reservoirs. Formation damage in recovery process of A-Nan low permeability sandstone reservoir is thoroughly studied on base of analysis of production performance and cores. The main factors leading to formation damage include paraffin precipitation lowering the permeability of the nearwell - bore formations in producers, poor quality of injected water resulting in near wellbore formation damage in injectors, particle movement leading to deep formation damage, germ plugging and formation sensitivity damage. These study results can provide a reliable basis for unplugging measure sellection and formation damage prevention in recovery process in A-Nan oilfield.