储层伤害的机理研究

STUDY ON THE MECHANISM OF FORMATION DAMAGE

储层伤害要从宏观和微观上进行机理研究。储层伤害的诊断、预防、控制与处理是一个系统工程，应针对具体油藏制定研究程序。储层各种敏感性之间具有内在联系，不同类型表面电荷特性微粒的分散运移规律对调整侵入流体矿化度具有不同的响应。提出了以预防为主、治理为辅的储层保护配套技术。研究了实用先进的智能化保护储层专家系统软件。本项研究已在华北、中原、塔里木等油田应用，取得了明显的效益。

In this paper,some new achievement in the authors′studies in recent years about themechanism of formation damage and formation protection techniques were presented.Formation damage should be studied from both macroscopic and microscopic aspects.The diagnosis,recognition prevention,controlling and treatment of formation damage is asystematic engineering.The specific research strategy has to be designed according to thetype of reservoir. There exist internal correlations among various sensitivities. The releaseand migrations of particles with different surface electrical characteristics have essentiallydifferent responses to the adjustment of the ion concentration of invading fluids. A set ofmating technologies for protecting from formation damage wes established,with preventionas the first treatment in the second place. An advanced and applicable intelligent computersystem for the protection of formation dalnage was established. These achievements havebeen applied in Huabei,Zhongyuan,Tarim oilfields and obvious economic results have beenobtained.