?????????????????????о??????

鄂尔多斯北部塔巴庙地区的气藏是典型的低压低渗裂缝性砂岩气藏。该区储层具有孔隙度低、渗透率低或致密、储层压力低、毛细管压力高、有效应力高以及储层不均质性强、裂缝和微裂缝发育等特征，简称“三低两高一强”。储层损害机理以储层液锁损害、应力敏感损害以及水敏、盐敏损害等为主。文章在分析储层特征及其损害机理的基础上，研究出了适合塔巴庙地区储层特征的屏蔽暂堵钻井完井液技术。该技术在鄂尔多斯北部塔巴庙、杭锦旗等地区10多口探井、评价井及开发井中进行了现场试验，在储层保护和提高天然气单井产量等方面取得了显著效果。

RESEARCH ON RESERVOIR SHIELDING-TEMPORARY PLUGGING DRILLING-COMPLETION FLUID TECHNIQUE AND ITS APPLICATION

The gas reservoirs in Tabamiao region of North E’erduosi Basin are the typical fractured sandstone gas reservoirs with low formation pressure and low permeability. The reservoirs in this region are of the following characteristics： low porosity， low permeability or high compactability， low reservoir pressure， high capillary pressure， high effective stress， strong heterogentity and developed fractures and microfissures， etc. The formation damage mechanisms mainly include liquid locking， stress sensitivity， water sensitivity and salt sensitivity damages. On the basis of analyzing reservoir characteristics and formation damage mechanisms， a shielding temperary plugging drilling completion fluid technique suitable for the reservoir characteristics in Tabamiao area was developed by the authors. Through field tests in more than 10 exploration wells， appraisal wells and development wells in Tabamiao and Hangjingqi regions of North E’erduosi Basin， it was proved that the considerable results were achieved in reservoir protection and increasing gas production of single well by use of such a technique.