海水钻井液的水合物抑制性实验研究

Experimental Studies on the Inhibition of Hydrates Using Seawater Drilling Fluids.

利用水合物生成及模拟微钻实验系统对部分钻井液处理剂及聚合醇无黏土海水钻井液进行了水合物抑制性实验研究。结果表明:黏土对水合物生成有明显促进作用;改性淀粉、聚合醇对水合物生成有一定的抑制作用;动力学抑制剂PVPK90有良好的水合物抑制能力;在-4℃和18.8 MPa附近压力条件下,加入动力学抑制剂的聚合醇无黏土海水钻井液能有效抑制水合物生成。

Some drilling fluid additives and a poly glycol clay-free seawater drilling fluid were studies on their capacity in inhibiting the formation of gas hydrates.It was found that clay promotes the formation of hydrates,while starch and poly glycol inhibit it.PVPK90,a dynamic hydrate inhibitor plays a great role in inhibiting the formation of hydrates in poly glycol clay-free seawater drilling fluid at-4 ℃ and 18.8 MPa.