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沙三段中亚段9砂组是渤南洼陷的重点勘探和含油层系之一。其储层在整个洼陷内分布广泛,含油气性较好,该区义601、义285、义65及义173等井,在沙三段中亚段9砂组试油均见到良好的工业油流,但不同区块储层沉积厚度、物性和油气充注程度不同,成藏条件复杂。以实钻资料为依据,对沙三段中亚段9砂组储层岩性、物性、含油性及横向变化特征进行了分析。研究认为该区沙三段中亚段9砂组为浊积扇体,主要分布在罗北及埕南洼陷边缘断裂所限定的断槽中,扇根位于南部,扇中位于渤南油田的主体部位,扇端位于北部义288井区,油藏类型主要为岩性及岩性-构造油气藏。
The 9 sand group of the middle Es3 of the Es3 Member is one of the key exploration and oil-bearing strata in the Bonan Sag. The reservoirs are widely distributed throughout the depression and have good hydrocarbon-bearing properties. The well 601, Yi 285, Yi 65 and Yi 173 in this area showed good results Industrial oil flow, but the sedimentary thickness, physical properties and filling degree of oil and gas in different blocks are different, and the reservoir forming conditions are complex. Based on the data of actual drilling, the lithology, physical property, oil content and lateral variation characteristics of 9 sandstone reservoir of Es3 in the third member of Shahejie Formation are analyzed. It is concluded that the 9 sand group in the middle segment of the third member of the Shahejie Formation is a turbidite fan body and is mainly distributed in the fractures defined by the marginal faults in the northern part of the Loess and Taonan sub-sails. The fan base is located in the southern part of the fan, The main body part and the fan end are located in the Yib 288 area in the north of China. The reservoir types are mainly lithology and lithology-structural reservoirs.