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余莉,何计彬,叶成明. 砾石充填防砂试验的出砂演化规律分析[J]. 科学技术与工程, 2020, 20(10): 3933-3939.
YU Li,HE Ji-bin,叶成明.Analysis on Sand Production Evolution Law of Gravel Filling Sand Control Test[J].Science Technology and Engineering,2020,20(10):3933-3939.
砾石充填防砂试验的出砂演化规律分析
Analysis on Sand Production Evolution Law of Gravel Filling Sand Control Test
投稿时间:2019-07-15  修订日期:2020-04-25
DOI:
中文关键词:  防砂试验  砾石充填  出砂  演化规律
英文关键词:sand control test  gravel filling  sand production  evolution law
基金项目:河北省高等学校科学技术研究项目(编号:BJ2018046);神狐海域天然气水合物先导试验区试采实施(中国地质调查局水环中心)项目
        
作者单位
余莉 河北大学
何计彬 中国地质调查局水文地质环境地质调查中心
叶成明 中国地质调查局水文地质环境地质调查中心
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中文摘要:
      针对泥质粉细砂水合物储层的防砂试验,其岩层、充填砾石的渗流特征变化直接影响着出砂演化机理。文中基于泥质粉细砂水合物储层和砾石充填防砂结构,采用自行研制的防砂试验系统进行防砂试验,从完整试验(从试验开始至无液体渗流阶段)和分时间段(2、4、6、8 min)分别研究气-液渗流特征和出砂现象,并对两种试验所形成的储层泥膜和防砂结构进行微观结构、含水量、密度的测量,得到了以下结论:(1)整体防砂试验分为4个阶段,即为初始渗流阶段、稳定渗流阶段、快速渗流阶段、无液体渗流阶段;(2)对比整体试验和分段试验,其气-水渗流特征具有相似性,其渗流规律几乎不受时间影响;(3)泥质粉细砂储层的渗流规律具有分层的特征,储层中液体分层发生了运移,它的运移导致了土层的固结,形成了不同稳定性的固结圈,即为稳定、较稳定、弱稳定泥膜固结圈和无扰动储层;(4)出砂演化规律为:储层液体稳定渗流→液体携带细粒固体颗粒运移→储层细粒侵入防砂结构→气水加速渗流→大量出砂→形成泥膜与防砂砾石共同作用的阻砂结构。
英文摘要:
      According to the sand control test of argillaceous silty fine sand hydrate reservoir, the change of seepage characteristics of strata and packed gravel directly affects the evolution mechanism of sand production. Based on the argillaceous fine sand hydrate reservoir and gravel filling sand control structure, the self-developed sand control test system was used to carry out sand control test. The gas-liquid seepage characteristics and sand production phenomena were studied from the complete test (from the beginning of the test to the stage of no-liquid seepage) and time intervals (2, 4, 6, 8 minutes), respectively. The formation of reservoir mud film and sand control structure was measured by micro-structure, water content and density, and the following conclusions were obtained: (1) The whole sand control test was divided into four stages, namely, initial seepage stage, stable seepage stage, rapid seepage stage and non-liquid seepage stage; (2) Comparing the whole test with the sectional test, the whole sand control test could be divided into four stages: initial seepage stage, stable seepage stage, rapid seepage stage and non-liquid seepage stage. The characteristics of gas-water seepage are similar, and its seepage law was almost unaffected by time; (3) The seepage law of argillaceous silty fine sand reservoir had the characteristics of stratification, the liquid stratification in reservoir had migrated, and its migration had led to the consolidation of soil layer, forming consolidation circles with different stability, that was, stable, relatively stable and weak stability. Mud film consolidation circle and undisturbed reservoir; (4) Sand production evolution law was: Reservoir fluid steady seepage→Transport of Fine Solid Particles by Liquids→Sand Control Structure of Fine Particle Invasion in Reservoir→Gas-Water Accelerated Seepage→Massive Sand Production→Formation of Sand-control Structure with Mud Film and Sand-control Gravel.
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