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新型钻井液成膜剂的研制及其在埕海油田的应用

ISSN号：1001-0890
期刊名称：石油钻探技术
时间：2013.3.3
页码：44-48
分类：TE254.4[石油与天然气工程—油气井工程]
作者机构：[1]中国石油大学北京石油工程学院,北京102249, [2]中国石油大港油田分公司,天津300289
相关基金：国家科技重大专项“渤海湾盆地黄骅坳陷滩海开发示范工程”（编号：2011ZX05050）、中国国家杰出青年基金项目“多孔介质油气藏气温性基础理论研究”（编号：50925414）和国家自然科学基金面上项目“复杂地层条件下.提高井壁稳定性新方法研究”（编号：51074173）联合资助.
相关项目：复杂地层条件下，提高井壁稳定性新方法研究

关键词：钻井液, 成膜剂, 防止地层损害, 封堵, 表皮系数, 埕海油田, Drilling fluid, film-forming agent, prevent formation damage, plugging, skin factor, Cheng-hai Oilfield

中文摘要：

为了降低埕海油田钻井过程中外来流体对储层的损害，基于成膜钻井液技术的基本理论，以苯乙烯、丙烯酸丁酯单体为原料，采用乳液聚合的方法，以过硫酸铵为引发剂，合成了新型钻井液成膜剂LCM-8。室内试验表明：埕海油田上部钻井液中加入成膜剂LCM-8后，流变性能能够满足携岩要求；能在岩心污染端形成一个渗透率极低的封堵带，封堵率可达90％以上；返排渗透率恢复率大于90％。新型钻井液成膜剂LCM-8在埕海油田2口井的储层钻进过程中进行了应用，结果表明，上部钻井液加入该成膜剂后，其性能能满足钻井要求，2口井的表皮系数为一2．31和-3．11，而未用该成膜剂2口邻井的表皮系数为-0．27和0．23。这说明，成膜剂LCM-8能满足埕海油田钻井要求，实现钻井过程中的储层保护。

英文摘要：

In order to reduce the reservoir damage caused by foreign fluid during drilling in Chenghai Oilfield,a new film-forming agent LCM-8 had been developed using styrene,butyl acrylate monomer and trigger ammonium persulfate, by emulsion polymerization method based on the film-forming technology. Laboratory tests showed that rheological properties of the drilling fluid could be gotten to carry cuttings af- ter adding LCM-8, which could form a plugging area with low permeability at the polluted end of the core. The plugging rate and flowback permeability recovery rate could be higher than 90%. LCM-8 had been ap- plied in two wells in Chenghai Oilfield, the results showed that the drilling fluid for the upper well section could meet the drilling demand after adding the film-forming agent,resulting in skin factors of --2.31 and --3.11 respectively,while the skin factors of two adjacent wells were --0. 27 and 0.23 respectively without adding the film forming agent. It showed that LCM-8 could meet the demand of drilling and reservoir pro- tection in Chenghai Oilfield.

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