M. Tabatabaei, A. D. Taleghani, Yuzhe Cai, L. Santos, N. Alem
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引用次数: 7
摘要
在增产井中,支撑剂床在提高油气产量方面发挥着至关重要的作用。在过去的20年里,人们一直在努力改善形状特征和机械强度特性,以确保支撑裂缝的高渗透性。然而,对支撑剂的表面性质进行工程设计,例如调整其润湿性,并没有得到相当大的关注。考虑到水润湿支撑剂不仅会因为碳氢化合物相对渗透率降低而限制产量,还会促进细粒通过支撑剂床的迁移,本文提出了一种使用石墨纳米片(GNP)改变支撑剂润湿性的方法。这一想法得益于石墨表面固有的疏水性、相对较低的成本以及用于涂覆支撑剂的平面几何形状。根据ISO 13503-5:2006(2006)和API RP 19D(2008)进行电导率测试,以检查涂层工艺如何改变对水和油的相对渗透率。根据模拟结果,在油湿油藏中,新开发的石墨涂层支撑剂加快了水的净化,提高了长期产油量。
Surface Modification of Proppant Using Hydrophobic Coating To Enhance Long-Term Production
Proppant bed can play a critical role in enhancing oil and gas production in stimulated wells. In the last 2 decades, there have been consistent efforts to improve shape characteristics and mechanical strength properties to guarantee high permeability in the resultant propped fracture. However, engineering the surface properties of proppants, such as tuning their wettability, has not received considerable attention. Considering that water-wet proppants can not only limit production because of reduced hydrocarbon relative permeability but also facilitate fines migration through the proppant bed, a methodology is presented here to alter the wettability of proppants using graphite nanoplatelets (GNPs). The idea benefits from the intrinsic hydrophobicity of graphitic surfaces, their relatively low cost, and their planar geometry for coating proppants. Conductivity tests are conducted according to ISO 13503-5:2006 (2006) and API RP 19D (2008) to examine how the coating process changes the relative permeability to water and oil. According to the simulation results, the newly developed graphite-coated proppants speed up the water cleanup and increase long-term oil production in an oil-wet reservoir.
期刊介绍:
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.