疏水暂堵剂HTPA-1 的研制及其性能评价

Development of hydrophobic temporary plugging agent HTPA-1 and its performance evaluation

蓝强

LAN Qiang

中石化胜利石油工程有限公司钻井工艺研究院

Drilling Technology Research Institute, SINOPEC Shengli Oilfield Service Corporation, Dongying, Shandong 257017, China

根据疏水暂堵理论研制出性能优良的疏水暂堵剂HTPA-1。采用光散射、SEM、吸附量测试等方法考察了HTPA-1 的粒径分布、形貌、接触角、油分散性、增黏效应和表面吸附性等性质，结果表明，HTPA-1 接触角81°~165°，具有较强的疏水性， 油分散性较好；粒径分布在900 nm 左右，具有一定的增黏效应；具有一定的降低表面张力的能力，最低能降至40 mN/m。在无黏土、聚磺、无固相等现场钻井液中加入HTPA-1，油相突破压力降低70% 以上，水相突破压力增加2 倍以上，从而起到限水通油的作用。

In this paper, the hydrophobic temporary plugging agent HTPA-1 with good performance was developed according to hydrophobic temporary plugging theory. Its size distribution, morphology, contact angle, oil dispersity, viscosifying effect and surface adsorbability were investigated by means of light scattering, SEM (scanning electron microscope) and absorption capacity test. It is shown that HTPA-1 has stronger hydrophobic property and better oil dispersity with contact angle of 81°-165°. It presents a certain viscosifying effect with grain size of 900 nm. It is capable of decreasing the surface tension to 40 mN/m at most. When the clay-free polysulfonate drilling fluid was added with HTPA-1, its oil phase breakthrough pressure decreased over 70% and water phase breakthrough pressure doubled. Obviously, HTPA-1 plays an important role in water confining and oil communicating.

10.13639/j.odpt.2016.04.010