辽河滩海地区原油物性变化规律研究

PHYSICAL PROPERTY VARIATION OF CRUDE OIL IN BEACH AREA,LIAOHE BASIN

在研究分析辽河滩海地区原油密度、粘度与深度的变化关系的基础上,建立原油物性在该地区变化的数据模型和完整变化的地质剖面。通过对总体井位和不同层位原油物性变化规律进行分析,统计并绘制出图像,对比拟合曲线,得出结论:原油物性在剖面上随深度增加,密度和粘度均增大,不同层位的具体变化趋势有差异性;在平面上以生油源为中心,原油物性呈环凹分布,即自生油源向四周,原油粘度与密度呈环型有规律地减小,也符合平面上油气富集带围绕生烃洼陷呈环带状分布的特点。

Based on relationship between crude oil density, viscosity and depth, it is established in this paper the data model and the complete geologic profile of crude oil physical property in beach area of the Liaohe Basin. Physical properties of crude oil from different wells and formations are analyzed. Figures are drawn and it is concluded that density and viscosity of crude oil increase with depth and the variation trend varies in different formations. The distribution of crude oil physical property assumes ring-shaped surrounding the hydrocarbon kitchen in plane： Viscosity and density of crude oil show regular decreases in ring from hydrocarbon kitchen to the surroundings. It is also consistent with the distribution characteristics of oil and gas accumulation zone, which appears zonal distribution around the depression