复杂断块油藏精细分层化学防砂技术与应用
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中国石油化工股份有限公司胜利油田分公司石油工程技术研究院

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TE358

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中石化胜利油田分公司专利实施项目“低粘活性乳液固砂剂”,编号YZ2402;中石化胜利油田博士后项目“水驱敏感稠油油藏防膨控砂体系研发”,编号YKB2412。


Research and Application of Fine Layered Chemical Sand Control in Complicated Fault-Block Reservoir
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    摘要:

    针对疏松砂岩断块油藏非均质性强,化学防砂剂注入不均匀的问题,开展了“层内低粘活性剂固砂+层间分层管柱防砂”精细分层防砂技术研究。室内试验表明,低粘活性剂固砂体系具有粘度低、伤害小、固结强度高的特点。体系粘度仅为4.5mPa·s,胶结岩心渗透率>1 μm2,抗压强度>5 MPa,适用油藏温度50-90℃。同时,基于分层化学防砂工艺管柱,实现一趟管柱分层选择性注入固砂剂,克服了防砂药剂注入不均匀的难题。矿场试验表明,精细分层化学防砂技术应用效果良好,典型措施井累产2700天后,日液52.4 m3/d,日油5.3 t/d,有效期大幅提升,对于复杂断块油藏防砂井延寿增效具有重要意义。

    Abstract:

    To solve the problem of the uneven injection of sand consolidating agents in strong heterogeneous reservoir, a fine layered chemical sand control technology based on the "intralayer low viscosity active agent sand consolidation and interlayer selective seperate layer sand control" was carried out. Indoor tests showed that the low viscosity active sand consolidation system was characterized by the good injectability, low damage and high consolidation strength. The viscosity of the sand consolidation system was 4.5mPa·s, the permeability of the consolidated sand core was more than 1 μm2, and the compressive strength of the cemented core was more than 5 MPa. The selective seperate layer chemical sand control string was complemented based on the injection parameter optimization, which could implement the selective injection of sand consolidation agents. The fine layered chemical sand control performed well in field tests. After a cumulative production of 2700 days, the liquid production of the test well was 52.4 m3/d, and the oil production was 5.3 t/d. The production and effective period have been significantly improved. It is of great significance to prolong the lifespan and increase the efficiency of sand control wells in complex fault-block reservoir.

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  • 收稿日期: 2024-05-14
  • 最后修改日期: 2024-05-14
  • 录用日期: 2024-06-14
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