一种井筒高效防蜡剂的微观作用机理研究

为防止井筒管杆结蜡,将自制高分子共聚型蜡晶改进剂与一种非离子表面活性剂进行复配,得到XP-4152高效防蜡剂.室内实验表明,最佳条件下制备的防蜡剂对长庆油田原油动态防蜡率达85%.采用红外光谱、偏光显微镜、差示扫描量热法、X-衍射等分析手段较详细地分析说明了该防蜡剂的防蜡微观作用机理.分析结果表明防蜡剂与蜡晶形成共晶从而抑制了蜡晶的生长,改变了纯蜡样的晶型结构及降低了蜡晶堆积的紧密程度.经现场应用,XP-4152高效防蜡剂能有效地抑制难溶蜡在井筒管杆上的聚积生长.

Study on the microcosmic mechanism of a high-performance paraffin inhibitor

In order to prevent paraffin accumulating on the pipe and rod in well-bore,a high-performance paraffin inhibitor (XP-4152) is synthesized by the compounding of a copolymer with a nonionic surfactant.The experimental results show that the paraffin-inhibiting efficiency of this paraffin inhibitor can reach to 85% when it is prepared under optimal condition.The microcosmic paraffin-inhibiting mechanism of this paraffin inhibitor is studied by Fourier transform infrared spectrometry,polarization microscope,differential scanning calorimetry,X-ray diffraction analysis.The results show that adding the paraffin inhibitor into pure paraffin can change the structure of the paraffin crystal,decrease the cumulation density of the paraffin crystal,and therefore inhibit the growth of paraffin crystal.The application results in Changqing Oilfield indicate that XP-4152 paraffin inhibitor can well inhibit the accumulation of paraffin on the pipe and rod in well-bore.