Many biomarkers are not suitable for complex types of oil at different biodegradation extent, especially multisource heavy oil in many regions. On the southern slope near Luxi Uplift, most oilfields are heavy oil regions while some are mixed heavy and light oil regions. Therefore, some parameters that can better show oil characteristics are needed to correlate complex oil and source. Many biomarkers and parameters, such as isoprene, gammacerane, Ts, Tm, diasterane, oleanane, C-30 hopane, C-29 sterane20S/20(R+S), and C-29 sterane beta beta/(alpha alpha+beta beta), are taken into consideration. It is found that some combinations and diagrams of some parameters have better oil-source correlation results, such as the Triangular chart of C-29 S/S+R, C-29 beta/(beta+alpha) and Ts/Tm, the cross plot of gammacerane/C-30 hopane and Pr/Ph, the plot of C29S/S+R and Ts/Tm, the plot of Ts/Tm and gammacerane/C30 hopane, and the plot of C29S/S+R and C-29 beta beta/(beta beta+alpha alpha alpha). Through correlations of oil and source, the oil is classified into three types, and the sources of oil in different areas are found. The oil in Boxing sag is mainly from Es-3 and Es-4 layers. The oil in Chunhua oilfield is mainly from Es-4. The oils in Lean, Bamian, and Wang areas are found to be derived from Es-4 oil source layers in Niuzhuang Sag. To clarify oil characteristics and oil source is meaningful to compare and find the distribution of better oil types.

在低油价的新常态新形势下,水动力充足,且具有良好油田水条件的中浅层油藏,逐渐成为了油田开发的重点,然而开发上对油田水成分特征的深入分析比较欠缺,各项离子参数与原油保存关系也模糊不清.为此,在深入分析油田水成分的基础上,分析了水型分布、钠氯系数、脱硫系数情况,比较了油田水矿化度和埋深的关系,找出了油田水与原油保存条件之间的关系,发现总矿化度和钠氯系数存在着较好的对应关系,较低的矿化度常对应较高的钠氯系数,即对原油保存有利的地区.高矿化度NaHCO3型和Na2SO4型水区,是寻找次生油藏的有利区域,此外,总矿化度高值、钠氯系数低值是有利于原油保存的重要地区.通过明确油田水特征,对利用油田水离子参数反推原油保存的有利区域具有重要意义.

The reservoirs in sixth sands of Guantao Formation,Gudao oilfield,is a lithologic-structure layered oil pool.The reservoir heterogeneity is serious,and the relation of oil and water is complicate.Since Gudao Oilfield came into the stage of high water cut,the oil layer is waterflooded seriously,the remaining oil is scattered,and hence the research of the reservoir discrimination as an important content of reservoir description becomes more and more important.This article summarized the methods and principle of identifying oil reservoirs by the methods of log parameter cross-plot,logging information multivariate statistics and grey theory discriminatory analysis,and draw up the standard of oil reservoir discrimination.The result of application is basically conformed to that of well testing result,the methods have a great potential of application and practice meaning.

According to statistics,in the world of today,more than three quarters of the oil and gas come from the management improving for hydrocarbon-bearing pool in existence,while less than one quarter comes from the discover of the fresh oil and gas pool.So the urgent matter of the moment is to increase the output of the exploitation hydrocarbon-bearing pool and to increase the rate of the oil and gas recovery,and the key is to study the remaining oil.The reservoir rocks underground are hard to directly be known.The property such as the physical properties of the rocks,the thermo baric field and the fluid property is significantly different,and the laboratory study can not exactly reflect the subsurface picture.Using the simulation model to simulate formation and the distribution of the remaining oil,this can intuitively show the spatial distribution and the evolution law of the remaining oil underground,and supply more reliable materials for the developing of the remaining oil.