摘要
塔河油田十二区奥陶系油藏为碳酸盐岩岩溶缝洞型油藏,油气水分布规律复杂。对原油的物理性质、平面及纵向上的分布特征、油水界面等的分析表明,区内主要为高黏度、含蜡、高含硫的超重质原油。平面上密度分布呈西部和东部低、中部高的特点;纵向上原油密度与深度关系不大。高产油区多沿主断裂带分布。油水界面不统一,但从东向西随中奥陶统顶面的降低而降低。认为该区油气分布不受现今构造位置高低的控制,而是受区域构造背景、断裂带的分布、储集层的发育程度、成藏演化过程以及不整合面等因素综合控制。
Ordovician reservoir is the karstified fractured/vuggy carbonate rock in Block 12 in Tahe Oilfield,in which oil,gas and water are distributed complexly in regularity.According to the analysis of the physical property of oil,the characteristics of hydrocarbon distribution in plane and vertical,and the oil-water interfaces,it is recognized that the oil is commonly overweight crude oil with high viscosity and high content of wax and sulfur.The oil density exhibits a distribution trend,in planar,of low values in the eastern and western parts and high values in the central part of this area but the oil density is little relative with depth in vertical.The oil-water interface is inconsistent and decreases with decreasing the Middle Ordovician top from east to west.The areas with high oil yield focuses along the main fault belts.It is shown that the hydrocarbon distribution is without the control of nowadays structural positions,instead of those factors such as the regional geological background,the distribution of fault belts,the development extent of reservoirs,the process of the hydrocarbon accumulation and unconformity.
出处
《海相油气地质》
北大核心
2012年第1期17-22,共6页
Marine Origin Petroleum Geology
基金
四川省重点学科资助项目(编号:SDZ0414)
国家科技重大专项<塔里木盆地大型碳酸盐岩油气田勘探开发示范工程>(编号:2008ZX05049)资助
关键词
奥陶系
碳酸盐岩油藏
缝洞型油藏
油气分布特征
原油密度
控制因素
塔河油田
Ordovician
Carbonate reservoir
Fracturing and caving reservoir
Hydrocarbon distribution characteristics
Oil density
Controlling factor
Tahe Oilfield
Tarim Basin
