辽河油田滨海区海月潜山油气评价

HYDROCARBON EVALUATION OF HAIYUE BURIED HILL IN LIAOHE OILFIELD LITTORAL AREA

在辽河盆地中,海月潜山是一个典型的、由下古生界碳酸盐岩组成的规模较大的潜山。通过对海月潜山的地层、构造和构造应力场等分析,得出潜山西北边缘有一个裂缝发育带和潜山内4个较强的张应力区和张扭应力区,正好与4个构造圈闭吻合,它们是油气储集区,并发现潜山顶部局部保留有残留古风化壳,风化壳中网状裂缝是重要的油气储集空间。这些表明海月潜山是一个具有勘探潜力和油气远景的潜山区,它是我国东部中、新生代含油气盆地之下潜山油气藏勘探的一个很好范例。

Haiyue buried hill composed of Paleozoic carbonatite is a larger scale and typical buried hill in Liaohe basin. Through analysis of strata, structure and tectonic stress field, a fissure zone in the northwest margin of the buried hill and four stronger tensile or tenso-shear stress blocks have been discovered. The four stress blocks are east Hainan 20 tenso-shear stress area, Yuedong 9 strong tensile stress area, Hainan 3 strong tensile stress area and east Hainan 8 tenso-shear stress area. They just tally with four structural traps. They are mainly areas of reservoir for oil and gas. Fossil weathering crusts have been found on some tops of the buried hill. Network fracture of the weathering crust is the main reservoir space. All facts show that the Haiyue buried hill has great exploration potential and prospective future. It is a good example of exploration for oil and gas of the buried hill in Mesozoic/Cenozoic basins in eastern China.