董集洼陷沙三上亚段油气成藏条件浅析

董集洼陷位于东营凹陷北部陡坡带坨94断层下降盘，在沙三上时期以辫状河三角洲沉积为主，主要发育了物源来自北部陈家庄凸起的宁海辫状河三角洲前缘砂体，储集层岩性以细砂岩、粉砂岩为主，物性较好，成藏条件有利。但是由于勘探程度较低，且控制本区油气富集的因素比较复杂，因此油气富集和分布的规律尚不十分清晰。通过对董集洼陷的构造特征、沉积体系、储层特征进行分析，总结出油气富集规律及主控因素，归纳了油气藏的分布规律，进一步指出了今后本区的研究重点和勘探方向。

Analysis on Oil-gas Reservoir Forming Condition in Upper Es3 of Dongji Subsag

Dongji subsag is located at the falling fault of Tuo 94 that is on the north of Dongying sag. Delta of plait river is the main sediment on upper Es 3, especially the front delta facies of Ninghai plait river originated from the heave of Chen Jia Zhuan on the north. The rock of the reservoir bed are mainly fine sandstone.The reservoir has good quality and favorable conditions for the formation of oil. Since the degree of exploration is low and the control factors of oil and gas accumulation in this region are relatively complex, the regularity of oil and gas accumulation and distribution are not very clear. This paper summarized the regularity and main control factors of oil and gas accumulation and generalized the distribution regularity of oil and gas reservoirs based on the analysis of the characteristics of configuration, the system of sediments and characteristics of reservoirs. Furthermore it pointed out the focus of research and the direction of exploration for this region from now on.