基于“逆推思维”的储量工作方法是以勘探苗头或发现为出发点,以规模储量发现为目标,逆推寻找制约规模增储的关键问题,围绕关键问题开展勘探部署、老井试油、储量研究等工作,最终把好苗头培育成规模增储区块。以大民屯沙四段砂砾岩体为例,详细阐述了该方法的实际操作流程。以培育规模储量为最终目标,通过全面分析研究找出制约该区储量大发现的关键问题:岩性复杂造成井间横向难对比;多期砂体叠置,沉积相带难确定;砂体含油层段差异较大,平面及纵向有效储层难预测。围绕关键问题成立攻关项目组,加强岩心联测,明确了该区岩性分类,将该区主要岩性划分为泥岩、粉细砂岩、细砂岩、中粗砂岩和砂砾岩五大类岩性,并制定了相应的岩性定性、定量评价标准;开展井震结合,追踪砂体横向及纵向展布范围;优选有利目标进行钻探及老井试油:沈354、沈358两口井钻探获得工业油流,沈263、沈351两口老井试油获得成功,不但在平面上扩大了储量控制面积,而且在纵向上增加了油层厚度。最终将该区培育成4000×10~4t级的储量规模,实现了将勘探苗头培育成规模储量的目标。 The reserves work method based on “reverse push thinking ” is based on exploration of signs or discoveries as the starting point, the size of reserves found as the goal, reverse push to find the key issues to control the increase of reserves, exploration and deployment around the key issues, the old well test oil , Reserves research and other work, and eventually cultivate a good sign to increase the size of the storage block. Taking the sand-gravel body in the fourth member of Damintun of Da-Min-Tu as an example, the actual operation flow of the method is elaborated. In order to cultivate large-scale reserves as the ultimate goal, the key problems restricting the discovery of reserves in this area are identified through a comprehensive analysis and research. The complicated lithology results in horizontal cross-well comparisons. Multi-stage sand bodies are superimposed and sedimentary facies belt is hard to determine. Large differences in the interval, the plane and vertical effective reservoir is difficult to predict. Based on key issues, the project team was set up to strengthen the joint measurement of cores, clarified the lithology classification of the area, and divided the main lithology of the area into five categories of lithology such as mudstone, fine sandstone, fine sandstone, middle coarse sandstone and conglomerate Developed corresponding qualitative and quantitative evaluation criteria of lithology; carried out combination of well and earthquake, traced the horizontal and vertical distribution of sand body; preferred favorable targets for drilling and old well test oil: Shen 354, Shen 358 drilling two wells to obtain industrial oil flow , Shen 263, Shen 351 two old well test oil success, not only in the plane to expand the reserve control area, but also increased in the vertical thickness of the reservoir. Finally, the area will be bred to a scale of 4,000 × 10 ~ 4t reserves, to achieve the goal of cultivating exploration seedlings into large-scale reserves.