抗多价阳离子降滤失剂的研发与性能评价
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1.西部钻探钻井液分公司;2.油气钻完井技术国家工程研究中心

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中国石油集团西部钻探工程有限公司横向成果转化-技术服务《抗多价阳离子降滤失剂的研发》(HX20231039)。


Development and performance evaluation of anti-multivalent cationic fluid loss agent
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National Engineering Research Center for Oli Gas Drilling and Completion Technology,China University of Petroleum Beijing

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    摘要:

    油气勘探开发作业中地质情况复杂,当钻遇到盐膏层时,地层水矿化度含量极高,同时可能含由大量Ca2+、Mg2+等二价金属阳离子,甚至含有Al3+等三价金属阳离子,对水基钻井液黏度、降滤失性产生了严重的负面影响。为了解决这一问题,本文在两性离子聚合物的基础上引入支化剂制备了一种抗多价阳离子两性离子超支化聚合物降滤失剂XZ-DJ2,通过实验探究了其最佳反应条件,并对其理化性质进行了一系列的表征。性能测试表明,加入2%的XZ-DJ2的基浆150 ℃老化16 h前后滤失量分别为5.6 mL和6 mL,在30%NaCl、30%KCl、5%CaCl2、5%MgCl2和1%Al2(SO4)3·18H2O污染的情况下150 ℃老化16 h后滤失量分别为6.3 mL、6.2 mL、5.2 mL、6.8 mL和7.0 mL,表明XZ-DJ2具有优异的抗温性能和抗多价阳离子污染能力,且XZ-DJ2是通过提升滤饼致密性而非提升钻井液粘度来达到降滤失的目的,有利于钻井提速,进一步节省钻井液作业成本。

    Abstract:

    Complex geological circumstances arise during the discovery and exploitation of oil and gas. Drilling into layers of salt and gypsum results in formation water with a very high mineralization content. This water may also contain a significant amount of divalent and trivalent metal cations, such as Al3+, as well as Mg2+ and Ca2+, which can seriously affect the viscosity and fluid loss reduction of water-based drilling fluids. In order to create an anti-multivalent cation zwitterionic hyperbranched polymer fluid loss reducer, or XZ-DJ2, this article presents a branching agent based on zwitterionic polymers to address this issue. Experiments were conducted to investigate the ideal reaction conditions and characterize several physicochemical characteristics. The base slurry containing 2% XZ-DJ2 had filtration losses of 5.6 mL and 6 mL, respectively, before and after aging at 150 °C for 16 hours, according to performance testing. The filtration losses were 6.3 mL, 6.2 mL, 5.2 mL, 6.8 mL, and 7.0 mL, respectively, following 16 hours of age at 150 °C with 30%NaCl,30%KCl,5%CaCl2,5%MgCl2 and 1%Al2(SO4)3.18H2O . This indicates that XZ-DJ2 has excellent temperature resistance and resistance to multivalent cation contamination and XZ-DJ2 achieves the goal of reducing filtration loss by improving the density of filter cake rather than increasing the viscosity of drilling fluid, which is conducive to drilling speed increase and further saves drilling fluid operation costs.

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  • 收稿日期: 2024-04-08
  • 最后修改日期: 2024-05-30
  • 录用日期: 2024-05-30
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