原油成熟度综合判识：来自分子标志物参数的限定--以东濮凹陷南部马厂地区高蜡原油为例  

Comprehensive Identification of Crude Oil Maturity with Molecular Marker——An Example of High Wax Crude Oil in Machang Area in the South of Dongpu Depression

作　　者：唐友军 吕岑 徐田武[2] 张云献[2] 李洪波 王霆 

机构地区：[1]长江大学资源与环境学院,湖北武汉430100 [2]中石化中原油田分公司勘探开发研究院,河南濮阳457001

出　　处：《长江大学学报（自然科学版）》2018年第23期5-9,20,共6页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项(2016ZX05006-004)

摘　　要：以东濮凹陷南部马厂地区的高蜡原油为主要研究对象,采用气相色谱-质谱技术,通过多种分子标志物参数对该区原油成熟度进行综合分析。利用饱和烃参数分析可得出,Ts/Tm主要分布在0.6～0.8之间,多数已进入成熟阶段,22S/(22S+22R)参数值大部分位于0.52～0.58之间,个别沙河街组三段下亚段样品已经超过平衡点参数值,成熟度相对较高,不太适合判识研究区成熟度。芳烃参数分析可知,马厂地区高蜡原油样品中检测出三芳甾烷的质量分数相对较低,整体主要在0.4%～2.0%,可以忽略不计,其中烷基菲参数测算出的大部分折算镜质体反射率参考值在0.6%～1.0%,MDR (4-甲基二苯并噻吩/1-甲基二苯并噻吩)基本处于4.0～6.0之间,具有较高的成熟度参考值,与实际研究情况较为相符。综合评价,东濮凹陷南部马厂地区高蜡原油大部分处于成熟阶段,少数沙河街三段中亚段和下亚段的样品,可能受控于沉积环境、生源等多种因素,导致个别原油样品成熟度异于大部分样品。The high wax crude oil in Machang Area in the southern part of Dongpu Depression was used as the main research object.The maturity of crude oil in this area was comprehensively analyzed by means of gas chromatography-mass spectrometry(GC-MS)and various molecular marker parameters.Based on the analysis of saturated hydrocarbon parameters,it could be concluded that Ts/Tm was mainly distributed between 0.6 and 0.8,and most of the 22 S/(22 S+22 R)parameters were in the range of 0.52～0.58,and most of the 22 S/(22 S+22 R)parameters are in the range of 0.52～0.58.Individual samples of the lower submember in the Third Member of Shahejie Formation exceeded the parameter value of the equilibrium point,and its maturity was relatively high,so it was not suitable to judge the maturity in the study area.The analysis of aromatics parameters showed that the content of triarosterane detected in the samples of high-wax crude oil from Machang Area was relatively low,and the whole content was mainly 0.4%～2.0%,which could be ignored.Most of the reference values of vitrinite reflectance calculated by alkyl phenanthrene parameters were between 0.6%～1.0% and the value of MDR is basically between 4.0～6.0,it had a higher maturity reference value,which was in line with the actual research.Comprehensive evaluation shows that most of the high wax crude oils in Machang Area in the south of Dongpu Depression are at mature stage.A few of the samples in the middle and lower sections of the Third Member of Shahejie Formation may be controlled by many factors,such as sedimentary environment,source and sedimentary environment,it causes the maturity of individual crude oil sample being different from the most samples.

关 键 词：东濮凹陷南部 原油 成熟度 分子标志物 

分 类 号：P618.13[天文地球—矿床学]