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喇萨杏油田的表外储集层是以油斑产状为主的泥质粉砂岩、粉砂质泥岩和含钙粉砂岩，与表内储集层属同一河流三角洲体系的沉积物。室内研究及矿场开采实践表明，表外储集层在现有开发技术条件下具有工业开采价值。主要阐述了表外储集层的含油结构特征及潜力，给出定量挖掘表外储集层潜力的开发工艺、技术措施，对喇萨杏油田的开发调整具有借鉴作用。
The extra-terrestrial reservoirs in LaSaxing Oilfield are mainly composed of argillaceous siltstone, silty mudstone and calcium siltstone, which belong to the same river delta system as the surface reservoirs. Laboratory studies and field mining practices show that off-balance-sheet reservoirs have industrial exploitation values under current development and technology conditions. Mainly elaborated the characteristics and potential of oil-bearing structure of extra-terrestrial reservoirs, and provided the development technology and technical measures for quantitatively tapping the potential of extra-terrestrial reservoirs, which would be of reference for the development and adjustment of Lazard apricot oilfield.