随钻堵漏用疏水缔合聚合物的作用机理分析
发布时间：2019-06-06 17:45
【摘要】：针对常规堵漏材料难以对非均质强的渗透地层实现随钻封堵的难题,以长碳链烷基二甲基烯丙基氯化铵、丙烯酰胺、N-乙烯基吡咯烷酮和丙烯酸为单体,通过调整引发剂比例和种类及反应条件后,合成了一种随钻堵漏用疏水缔合聚合物JD。通过红外光谱表征,合成产物为4种单体的共聚物。分别对0.3%和0.6%的JD溶液及加有0.3%JD的4%膨润土浆进行透射电镜分析表明,聚合物分子之间通过疏水缔合形成了类似胶束的疏水缔合结构,其尺寸约为0.1~0.2μm,同时疏水缔合聚合物与膨润土之间形成了动态网架结构,这正是其具有优良封堵性能的原因。通过使用FEIQuanta200F场发射环境扫描电镜测试得到,加入JD后的滤饼表面有大量聚合物形成的网架结构。静态封堵结果表明,在钻井液体系中加入0.3%JD,粒径为0.45~0.90 mm砂床的漏失量降低82%,粒径为0.22~0.45 mm与0.12~0.22 mm砂床可完全封堵,即JD可对不同漏失情况的砂床实现有效封堵,使钻井液可以随钻封堵非均质性渗透地层。配伍性评价表明,JD与SMP-Ⅱ、SPNH、聚合醇有良好的复配效果,与Redu1、NH4-HPAN、乳化沥青复配黏度和切力有所增大,因此JD更适用于黏度和切力不太高的体系。
[Abstract]:In order to solve the problem that conventional plugging materials are difficult to block heterogeneous permeable formation while drilling, long carbon chain alkyl dimethyl allyl ammonium chloride, acrylamide, N-vinylpyrrolidone and acrylic acid are used as monomers. A hydrophobic association polymer JD. for plugging leakage while drilling was synthesized by adjusting the proportion, type and reaction conditions of initiator. The products were characterized by infrared spectroscopy, and the synthesized products were Copolymer of four monomers. The transmission electron microscope analysis of 0.3% and 0.6% JD solution and 4% bentonite pulp with 0.3%JD showed that the hydrophobic association structure similar to micelle was formed by hydrophobic association between polymer molecules. Its size is about 0.1 ~ 0.2 渭 m, and a dynamic grid structure is formed between hydrophobic association polymer and bentonite, which is the reason for its excellent blocking performance. By using FEIQuanta200F field emission environment scanning electron microscope, it is found that there is a large number of polymer grid structure on the surface of filter cake after adding JD. The static sealing results show that when 0.3% JDD is added to the drilling fluid system, the leakage of the sand bed with a particle size of 0.45 鈮，
本文编号：2494486
[Abstract]:In order to solve the problem that conventional plugging materials are difficult to block heterogeneous permeable formation while drilling, long carbon chain alkyl dimethyl allyl ammonium chloride, acrylamide, N-vinylpyrrolidone and acrylic acid are used as monomers. A hydrophobic association polymer JD. for plugging leakage while drilling was synthesized by adjusting the proportion, type and reaction conditions of initiator. The products were characterized by infrared spectroscopy, and the synthesized products were Copolymer of four monomers. The transmission electron microscope analysis of 0.3% and 0.6% JD solution and 4% bentonite pulp with 0.3%JD showed that the hydrophobic association structure similar to micelle was formed by hydrophobic association between polymer molecules. Its size is about 0.1 ~ 0.2 渭 m, and a dynamic grid structure is formed between hydrophobic association polymer and bentonite, which is the reason for its excellent blocking performance. By using FEIQuanta200F field emission environment scanning electron microscope, it is found that there is a large number of polymer grid structure on the surface of filter cake after adding JD. The static sealing results show that when 0.3% JDD is added to the drilling fluid system, the leakage of the sand bed with a particle size of 0.45 鈮，
本文编号：2494486
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