南襄盆地泌阳凹陷已发现９个油田，地质研究程度较高。双河—赵凹地区位于泌阳断陷湖盆陡坡带，下第三系核桃园组三段上部（简称核三上段）是主要产油层。断陷湖盆完整的陆相层序体系域具四分性：低水位体系域、水进体系域、高水位体系域及水退体系域（双河—赵凹地区未发育低水位体系域），不同的层序样式可构成不同的生储盖组合。在运用陆相层序地层学原理及方法划分核三上段沉积层序、体系域的基础上，综合考虑泌阳断陷陡坡带陆相层序中的地层堆叠样式和尖灭型式、区域性油源层和区域性盖层、局部性油源层和局部性盖层及几个重要的特殊封盖面（如层序顶及底界面、下超面和盆缘边界断裂面等）等因素，将其油气藏的成藏类型归纳为３类（岩性成藏，地层成藏，复合成藏）、８亚类、１０种。水进体系域成藏类型最多，其次为水退体系域和高水位体系域，低水位体系域成藏类型较少。从成藏类型的空间展布规律来看，水进体系域是油气勘探的重要目的层段。图５参１１（邹冬平摘） Nine oilfields have been discovered in Biyang depression of Nanxiang basin, with a high degree of geological research. The Shuanghe-Zhao-Au region is located in the steep slope of the Biyang faulted lake basin. The upper part of the third member of the Lower Tertiary Hetaoyuan Formation (the upper third of the third member) is the main oil-producing layer. The complete terrigenous sequence system tract of the fault depression lake basin has the following characteristics: low-water system tract, water-in-system tract, high-water system tract and water-retreat system tract (undeveloped low-water system tract in Shuanghe- , Different sequence patterns can form different combinations of reservoir and cover. Based on the sequence stratigraphy and the method of terrestrial sequence stratigraphy, the stratigraphic sequence and system tract of the upper third member of the core are classified. Source and regional caprock, local oil source layer and local caprock, and several important special capstones (such as top and bottom boundary of sequence, subsurface superfacial and basin boundary fracture, etc.) The types of reservoirs are classified into three types (lithology, stratigraphic accumulation and compound reservoir formation), eight sub-types and ten species. There are a large number of water-in-system traps, followed by water-retreat system and high-water system tract, and low-water system tract is less. From the spatial distribution of accumulation types of law, the water into the system of oil and gas exploration is an important target layer. Figure 5 Senate 11 (Zou Dongping pick)