温敏型凝胶堵漏剂的室内研究

针对凝胶堵漏成胶可控性差、高温下结构强度弱的问题，以为基础，制备了一种温敏型凝胶堵漏剂BZ-WNJ，并对其成胶性能进行了综合评价。室内研究表明，BZ-WNJ在80～180℃之间均可形成固态凝胶，具有广谱温敏效应，凝胶强度较可得然胶提高137%，同时BZ-WNJ解决了大颗粒固相对高温成胶的影响，可与其他颗粒状、纤维状堵漏剂复合使用，封闭漏层裂缝同时提升漏失通道内黏滞阻力，提升地层承压能力。 

Laboratory Study on Temperature Sensitive Gel Lost Circulation Material

Gel lost circulation materials (LCM) currently in use have some deficiencies such as poor gelling controllability and weak structural strength at high temperatures. To deal with these problems, a temperature sensitive gel lost circulation material (LCM) BZWNJ was developed with Curdlan gum. Laboratory study showed that BZ-WNJ forms solid gel between 80 ℃ and 180 ℃, and has broad-spectrum temperature sensitivity. Compared with Curdlan gum, the gel strength of BZ-WNJ is increased by 137%. Meanwhile, using BZ-WNJ, the effects of large particle solids on high temperature gelling are minimized, making BZ-WNJ compatible with other particulate LCMs and fibrous LCMs in sealing off fractures through which the mud is lost, increasing the viscous resistance in mud loss channels and enhancing the pressure-bearing capacity of the formation.