储层压实预测与定向井筒完整性评价研究

doi:10.13722/j.cnki.jrme.2014.0977

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摘要孔隙压力下降引起储层压实及地表沉降，潜在威胁着井筒完整性。国内外尚缺乏储层压实预测与定向井筒完整性评价的理论方法。根据孔隙介质弹性理论，推导孔隙压力下降引起储层压实量和地表沉降量的计算公式。基于地层与井筒的力学作用，揭示储层压实诱发定向井筒失效机制，并提出井筒完整性定量评价方法。研究表明，生产井段中套管屈曲失稳和储层中套管挤毁是主要的失效机制；采取在储层中使用高钢级或厚壁套管及提高固井质量等措施能够改善井筒完整性。研究成果为储层压实油田的井筒完整性评价和套管设计提供科学依据。

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	尹飞1
	高德利1
	赵景芳2
	刘军波2
	宋林松2
	马德新2

关键词 ：石油工程, 井筒完整性, 储层压实, 地表沉降, 套管损坏, 衰竭油田

Abstract：Reservoir compaction and surface subsidence caused by pore pressure depletion endanger oil and gas well integrity potentially. The theoretical methods of reservoir compaction prediction and well integrity assessment are scarce. According to the elastic theory of porous medium，the calculation formulas of reservoir compaction and surface subsidence are deduced. Based on the mechanical interaction of formation and well，the failure mechanisms of directional well are revealed and the quantitative assessment method of well integrity is proposed. Results indicate that casing buckling in production interval and casing collapse in reservoir are the main failure mechanisms. The countermeasures，including utilizing higher steel grade or heavy-wall casings and enhancing cementing quality，can improve well integrity. The research achievements provide the scientific bases of well integrity assessment and casing design for depleting oilfields.

Key words： petroleum engineering well integrity reservoir compaction surface subsidence casing damage depleting oilfield

引用本文:

尹飞1，高德利1，赵景芳2，刘军波2，宋林松2，马德新2. 储层压实预测与定向井筒完整性评价研究[J]. 岩石力学与工程学报, 2015, 34(S2): 4171-4177.
YIN Fei1，GAO Deli1，ZHAO Jingfang2，LIU Junbo2，SONG Linsong2，MA Dexin2. STUDY ON PREDICTION OF RESERVOIR COMPACTION AND ASSESSMENT OF DIRECTIONAL WELL INTEGRITY. , 2015, 34(S2): 4171-4177.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.0977 或 https://rockmech.whrsm.ac.cn/CN/Y2015/V34/IS2/4171

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