SUBSTANTIATION AND SELECTION OF AN INHIBITOR FOR PREVENTING THE FORMATION OF ASPHALT-RESIN-PARAFFIN DEPOSITS
SUBSTANTIATION AND SELECTION OF AN INHIBITOR FOR PREVENTING THE FORMATION OF ASPHALT-RESIN-PARAFFIN DEPOSITS
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用于防止沥青-树脂-石蜡沉积物形成的抑制剂的证实和选择
DOI：
10.52571/ptq.v17.n34.2020.565_p34_pgs_541_551.pdf
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
M. S. Sandyga
中科院分区：
文献类型：
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作者：
Karina Shamilevna Khaibullina;L. R. Sagirova;M. S. Sandyga
目前，大多数油田处于开发后期，这与油藏产品生产过程中的一些挑战有关，包括“井底地层带”系统中沥青-树脂-石蜡沉积（ARPD）的形成。尽管有机矿床形成的问题已经存在了60多年，但它在今天仍然具有相关性。目前，为了防止ARPD的形成，在使用润湿剂、改性剂、抑制剂和分散剂的基础上，抑制剂被广泛应用于现场实践。抑制剂的组成通常包括表面活性剂，根据现场经验，非离子表面活性剂，即聚酯，被广泛用于防止ARPD的形成。然而，对具有联合作用的抑制剂知之甚少，例如，在ARPD中具有抑制剂分散特性。在此基础上，本工作旨在开发一种具有抑制剂分散特性的联合抑制剂，以防止ARPD的形成。用毛细管法和光比色法测定了所制试剂对沥青质颗粒的分散性能。这些研究是为了评估试剂对凝固点的影响。利用“冷棒”装置对沉积过程进行了定量评估，并给出了开发的ARPD试剂缓蚀剂耐腐蚀性的研究结果。用石蜡测定油饱和温度的方法有两种：直接法-目测法（Axio Lab A1显微镜）和间接法-流变法测定油的运动粘度法（hva -472粘度分析仪（Walter Herzog GmbH，德国））。因此，开发了一种ARPD抑制剂IN-1，它由乙烯与α-烯烃的共聚物或丙烯酸、甲基丙烯酸或氰丙烯酸酯的聚合物、反相水包油乳化剂和溶剂组成。所开发的缓释剂具有降压剂分散特性，能够在冬季降低油的凝固点，减缓井内和井底地层层（BHFZ）石蜡结晶的沉淀。
Currently, most oil fields are under the late stage of development, which is associated with some challenges during the production of reservoir products, including the formation of asphalt-resin-paraffin deposits (ARPD) in the “well – bottom-hole formation zone” system. Even though the problem of organic deposits creation has existed for more than 60 years, it is still relevant today. Currently, to prevent the formation of ARPD, inhibitors divided into methods based on the use of wetting agents, modifiers, depressors, and dispersants are widely used infield practice. The composition of inhibitors often includes surfactants, and according to field experience, nonionic surfactants, namely, polyesters, are widely used to prevent the formation of ARPD. However, little is known about inhibitors with a combined effect, for example, possessing depressor-dispersing properties concerning ARPD. Proceeding from the above, the work is aimed to develop a combined inhibitor with depressor-dispersing properties to prevent the formation of ARPD. The dispersing property of the prepared reagent for asphaltene particles was determined using capillary and photocolorimetric methods. The studies were conducted to assess the impact of the reagent on the freezing point. A quantitative assessment of the sedimentation process using the “Cold rod” installation was performed, and the results of studies of the developed ARPD reagent-inhibitor corrosion resistance were presented. Two methods determined the temperature of oil saturation with paraffin: the direct approach – visual observation (Axio Lab A1 microscope) and the indirect approach – rheogoniometry to determine the kinematic viscosity of oil (HVM-472 viscosity analyzer (Walter Herzog GmbH, Germany)). Thus, an ARPD inhibitor (IN-1), comprising a copolymer of ethylene with α-olefins or polymers of acrylic, methacrylic, or cyanoacrylic acid esters, an emulsifier of inverted oil-in-water emulsions and a solvent, was developed. The developed inhibitor, having depressor-dispersing properties, is capable of reducing oil-freezing point in winter and of slowing down the precipitation of paraffin crystals in well equipped and in the bottom-hole formation zone (BHFZ).