DSJ-1防膨和缩膨机理的探究
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1.中石化(大连)石油化工研究院有限公司;2.辽宁石油化工大学;3.中国石化工胜利油田分公司石油工程技术研究院

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中国石化科技项目“中低渗透油藏化学剂的开发及应用”子课题“水敏油藏化学品的开发与应用”(项目编号:420055-5)


Study on the Anti Swelling and Shrinkage Swelling Mechanism of DSJ-1
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    摘要:

    针对泥质含量高、渗透率低的油藏,许多报道指出缩膨剂能够起到降压、增注的效果,但尚无相关机理的研究报道。本文考察了DSJ-1缩膨剂加量对防膨率和缩膨率的影响,并对处理前、处理后的膨润土进行了XRD、XRF、zeta电位、热重、粒度分布、光学显微镜表征。通过表征对其防膨和缩膨机理进行了分析,发现防膨处理过程中,DSJ-1主要吸附在粘土表面,吸附量、zeta电位对防膨率影响最大;在缩膨处理过程中,DSJ-1主要吸附在晶层间,颗粒聚集体尺寸、zeta电位影响缩膨率大小。

    Abstract:

    For reservoirs with high shale content and low permeability, many reports have pointed out that shrinkage swelling agents can reduce pressure and increase injection, but there is no research report on the relevant mechanism. In this paper, the effect of DSJ-1 shrinkage swelling agent addition on anti swelling ratio and shrinkage swelling ratio was investigated, and the bentonite before and after treatment were characterized by XRD, XRF, zeta potential, thermogravimetry, particle size distribution and optical microscope. Through characterization, the anti swelling and shrinkage swelling mechanisms were analyzed. It was found that DSJ-1 was mainly adsorbed on the clay surface during the anti swelling treatment, and the adsorption amount and zeta potential had the greatest impact on the anti swelling rate. During the shrinkage swelling treatment, DSJ-1 was mainly adsorbed between crystal layers, and the particle aggregate size and zeta potential affected the shrinkage swelling rate.

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  • 收稿日期: 2022-08-04
  • 最后修改日期: 2022-08-04
  • 录用日期: 2022-09-06
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