海上多元热流体气窜凝胶调堵体系研究  

A Study of Gel-plugging Agents Used in Gas Channels with Multi-thermal Fluids in Offshore Oilfields

作　　者：韩晓冬 邹剑 王秋霞 刘义刚 孟祥海 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津塘沽300452

出　　处：《西南石油大学学报（自然科学版）》2017年第6期167-172,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05057-005)

摘　　要：针对渤海油田多元热流体吞吐开发过程中出现的气窜及现有泡沫体系封堵强度较低的问题,开展了室内实验研究,对封堵强度相对较高的凝胶体系的流变性和封堵性进行了评价和优选。同时,对含油率、平台污水对封堵体系性能的影响,以及封堵体系对产出液破乳的影响进行了评价。实验结果表明,优选的凝胶体系在高温下具有良好的封堵性能,且可采用平台污水配液。体系耐油性能较强,且体系的使用不会对产出液破乳产生较大影响。在总结大量实验结果的基础上,建立了针对不同油藏和气窜条件下的凝胶配方选择图版,以指导现场气窜调堵方案的设计和实施。With respect to the problems arising from the application of multi-thermal fluids in the Bohai Bay field, such as the formation of gas channels and the low plugging strength of the existing foaming system, a series of experiments were conducted to evaluate and select the rheological property and blocking efficiency of gel-plugging agents with relatively high plugging strength. At the same time, the effects of oil content and wastewater on the performance of the plugging system, as well as those of the plugging effects on the demulsification of the recovered liquid, were evaluated. The experimental results proved that the preferred gel-plugging agent demonstrated high blocking efficiency at high temperatures and could be prepared with waste water of the platform. The tolerance of the gel-plugging agents was relatively high, and their application did not significantly affect the demulsification output. Based on a large number of experiments, a selection chart for the gel formulation based on different oil reservoirs and various gas channeling conditions was established to guide the on-site design and implementation of the scheme.

关 键 词：稠油油藏 热采 气窜 化学调堵 选择图版 

分 类 号：TE357[石油与天然气工程—油气田开发工程]