在泌阳断陷深凹区确定有效圈闭

泌阳断陷沉积了巨厚的老第三系稳定的湖相水下沉积，深凹区是主要的生油区，地层极平缓。核桃园组以页岩、白云岩及砂岩薄互层为主，储层的孔渗性变差。该文在研究泌阳断陷深凹区区域构造背景和油气地质特征的基础上，着重对老第三系内隐伏断层进行了研究，指出油气勘探有利地区和提出建议井位。

DETERMINING VALID TRAP IN THE DEEP DEPRESSION OF BIYANG RIFTED-BASIN

There is great thickness of lake sediments of Eogene in Biyang rifted-basin. The layers in the deep depression which was the main oil source area are almost horizontal. Hetaoyuan member is composed of thin interbeded shales,dolomites and sandstones. The porosity and permeability of reservoir are poor. It is the important way of researching the effective reservoirs and traps in the deep depression to study the characteristics of subtle faults and their distribution inside the oil-bearing layers.While studying the tectonic situation and oil-gas geologic characteristics of Biyang rifted-basin,the subtle faults in Eogene strata are also under the consideration. The favourable district of oil, gas prospecting and the location of proposal wells are suggested in this paper.