论文部分内容阅读
钻井过程中由于泥浆漏失导致的费用在钻井费用中占很大的比列,目前借助于交联聚合物来堵漏的方法效果显著,能够在井下的温度和压力下封堵大的裂缝。本文主要描述了用于控制严重井漏的纳米复合有机/无机凝胶的实验研究,这种新型堵漏材料由四种组分组成:水溶性黏性聚合物基、交联剂、可膨胀交联聚合物颗粒以及胶体物质。所形成的纳米复合有机/无机凝胶具有良好的黏着性和伸缩性,承压能力强;实验考察了交联聚合物颗粒浓度、矿化度以及压力对交联动力学的影响;评价了对地层的伤害;设计了特殊的实验设备来模拟现场堵漏,评价凝胶的封堵性能。交联时间、凝胶形成前的黏度、形成凝胶的强度以及这些参数与压力、温度相关性的表征借助于一种可控的切力流变仪Haake RS150。
Drilling costs due to mud loss account for a large proportion of drilling costs. Currently, the method of plugging by means of cross-linked polymers is effective and can seal large cracks under downhole temperature and pressure. This article describes the experimental study of nanocomposite organic / inorganic gels used to control severe through-hole leaks. The new plugging material consists of four components: a water-soluble viscous polymer base, a crosslinker, Co-polymer particles and colloids. The formed nanocomposite organic / inorganic gel has good adhesiveness and scalability and strong pressure-bearing capacity; the influence of the concentration of cross-linked polymer particles, salinity and pressure on the crosslinking kinetics was investigated experimentally; Of the damage; designed a special experimental equipment to simulate the scene of plugging, gel evaluation of the sealing performance. The crosslinking time, the viscosity before gel formation, the strength of the gel formed and the characterization of these parameters as a function of pressure and temperature are based on a controlled shear force rheometer Haake RS150.