提高二界面胶结质量的矿渣钻井液滤饼可固化技术  

Solidification of Slag Mud Cake that Improves Cementation Quality of the Second Bonding Interface

作　　者：梅雨堃 李明[1] 刘璐[1] 张冠华[1] 郭小阳[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《钻井液与完井液》2016年第1期68-72,共5页Drilling Fluid & Completion Fluid

基　　金：塔里木油田公司局级项目"工艺安全与钻完井工程基础研究"(TLM2011JT05)

摘　　要：难以固化的滤饼直接导致固井第二界面胶结质量差。为提高第二界面胶结质量,基于矿渣受碱激发特性,提出矿渣钻井液滤饼可固化技术,并进行了研究,考察了矿渣钻井液滤饼对第二界面胶结性能的影响;对该技术配套冲洗液进行研究;通过XRD测试分析滤饼物相组成及作用机理。结果表明,矿渣钻井液滤饼可固化技术有助于提高第二界面胶结强度,改善第二界面胶结形貌;配套冲洗液显著提高上述技术效果;矿渣钻井液滤饼具有潜在固化活性,经冲洗液渗透、预激活,并与水泥浆成分交换,共同水化,生成C—S—H凝胶,包覆、连接固相颗粒,填充结构孔隙,实现滤饼、水泥环整体固化,第二界面胶结强度提高。研究表明,矿渣钻井液滤饼可固化技术与配套冲洗液技术有助于提高第二界面胶结质量,该研究对无机矿物凝胶材料在钻井液中的应用,特别是工业废料的环境保护再利用,具有科学的理论指导意义。Poor solidification of filter cake results in poor cementation quality of the second bonding interface （between filter cake and cement sheath）. Technology for the solidification of slag mud cake is presented to try to improve the cementation quality of the second bonding interface. This technology is based on the characteristics of slag, which can be activated by alkali. Several studies have been conducted, including： effects of slag mud cake on the cementation performance of the second bonding interface; flushing fluid for this technology; and phase composition and functioning mechanism of filter cake inspected using XRD. The studies show that the slag mud cake solidification technology helps improve the cementation quality and the cementation morphology of the second bonding interface. The flushing fluid further improves the cementation quality. Slag mud cake, having the potential of being solidified, after penetration and pre-activation by the flushing fluid, exchanges matters with cement slurry. Both the slag mud cake and the cement during this course hydrate simultaneously, producing C-S-H gels which encapsulate and link solid particles and fill the spaces among cement particles, making the filter cake and cement sheath solidify as a whole. It has been proved that this technology, when used in combination with the designed flushing fluid, is beneficial to the improvement of the cementation quality of the second bonding interface. These studies are of importance to the use of inorganic gel materials in drilling fluids, especially the recycling of industrial wastes.

关 键 词：矿渣钻井液 滤饼可固化技术 冲洗液 

分 类 号：TE256.6[石油与天然气工程—油气井工程]