大民屯凹陷沙四段以扇三角洲沉积为主,储层砂体岩性主要为砾岩、砂砾岩、中粗砂岩以及细砂岩,通过对完钻井测井、录井岩性特征的研究发现,测井和录井对于岩性并没有统一的识别标准;同时,从已发现储量的平面和垂向分布特征来看,其与构造特征以及沉积特征之间并没有较好的匹配关系。为解决上述问题,以复查老井、开展单井评价为突破口,从岩性、物性、电性、含油性四性关系研究出发,验证单井油气层的存在,建立了油气层识别标准,并应用该标准开展了老井二次试油和新探井研究:复查老井22口,实施老井试油3口,其中2口井获得工业油流;部署实施探井4口,其中3口井获得工业油流;新增控制含油面积近30km2,控制储量余4000×104t。在研究过程中,形成了一套砂砾岩体勘探研究技术序列,并获得“陡岸控砂、相带控储、物性控藏”的地质认识。 The Sha-4 Member of Damintun Depression is dominated by fan-delta deposition. The lithology of reservoir sandstone is mainly conglomerate, glutenite, medium-coarse sandstone and fine sandstone. Through the study of logging completion and logging lithology Well logging and mud logging do not have a uniform identification standard for lithology. In the meantime, there is no good match between structural features and sedimentary features from the plane and vertical distribution of discovered reserves. In order to solve the above problems, taking the reexamination of the old wells and the single well evaluation as the breakthrough point, starting from the relationship between lithology, physical property, electrical property and oiliness, verifying the existence of single-well oil-gas reservoir, establishing the identification standard of reservoir The standard was applied to carry out the secondary well testing and new exploration well testing of old wells: 22 old wells were reexamined, 3 old wells were tested, of which 2 wells received industrial oil flow; 4 exploratory wells were deployed and 3 of them were obtained Industrial oil flow; new control oil area of ​​nearly 30km2, control reserve more than 4000 × 104t. In the course of the research, a set of technologies for the exploration and research of glutenite bodies have been formed, and the geological understanding of “controlled steep sand bank, facies controlled storage, and property controlled reservoir” has been obtained.