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垦利C50井的53.20米岩心是一套粗碎屑岩层,属渐新世沙河街组三段早、中期。在沉积物组分、粒度、构造、生物、部分粒屑形态,及沉积速率等方面,均显示出非海相湖盆浊积岩的特征。推测,当时C50井所处的湖盆沿岸,物源丰富,水底坡度较大(约5°～10°)。因此,在山洪等强大脉冲式水动力激发下,含有大量陆缘碎屑的高密度泥沙流,沿水下斜坡呈悬浮状态,间歇性地潜向C50井所处的深湖区,形成由基本无化石粗碎屑岩、含再沉积近岸生物的细拉碎屑岩,与具深水型生物的泥岩交替出现为特征的浊积岩休。在顶底两套较细粒的末梢相层系之间,构成有利的油气储盖组合。
The 53.20-meter core of Kenli C50 is a set of coarse-grained rock formations, belonging to the early and mid-third stages of the Oligocene Shahejie Formation. The characteristics of non-marine lacustrine turbidite are shown in terms of sediment composition, grain size, structure, biology, part of the pellet morphology and sedimentation rate. Speculated that when the well C50 where the lake is located, rich in provenance, water bottom gradient (about 5 ° ~ 10 °). Therefore, under the strong impulsive hydrodynamic force such as flash flood, the high-density sediment stream containing a large amount of continental marginal debris floats along the underwater slope and intermittently dive into the deep lake area where the C50 well is located, No fossilite clastic rocks, fine pull clastic rocks with re-deposited nearshore organisms, turbidites characterized by the alternating appearance of muddy rocks with deep-water biological organisms. Between the top and bottom two sets of finer grain boundary facies, constitutes a favorable combination of oil and gas reserves.