Method for depicting range of biodegradable heavy oil reservoir

Abstract

The invention belongs to the technical field of oil and gas geochemical exploration, and particularly relates to a method for depicting a biodegradable heavy oil reservoir range. Comprising the following steps: determining a typical biodegradable heavy oil standard sample by combining physical properties of crude oil; obtaining the typical fluorescence spectrum of the biodegradable thickened oil and the wavelength range W of the peak of the fluorescence spectrum; the to-be-detected thick oil sample component is dissolved in the extracting solution; identifying the components of the to-be-detected thickened oil sample with the fluorescence spectrum wave peak wavelength range within W; and calculating the volume of the heavy oil reservoir to obtain the range of the biodegradable heavy oil reservoir. According to the physical properties of the biodegradable thickened oil, saturated hydrocarbon biomarker compound parameters and fluorescence characteristics, a typical fluorescence spectrum and a wave crest wavelength range of the biodegradable thickened oil are obtained, hydrocarbons in a reservoir are screened, the ranges of the biodegradable thickened oil in the vertical direction and the plane are depicted, the volume of the deep biodegradable thickened oil is calculated, and the volume of the deep biodegradable thickened oil is calculated. And the range of the heavy oil reservoir can be predicted, so that safe and rapid drilling is effectively guided.

Description

technical field [0001] The invention belongs to the technical field of oil and gas geochemical exploration, in particular to a method for describing the range of biodegradable thick oil reservoir. Background technology [0002] The physical properties of crude oil are complex and changeable. Heavy oil has attracted much attention because of its low recovery efficiency. Its genesis is mainly biodegradation (Niu Jiayu et al., 2003; Wang Shijie et al., 2005; Zhou Yingjie, 2006). The discovery of heavy oil and gas in Tarim Basin and the evaluation of the distribution of heavy oil and gas in Junggar basin are of great significance. However, the current understanding and Research on biodegradable heavy oil mainly focus on the genetic mechanism, and there is no fast and effective technical method to describe its scope (Li et al., 2005; Yu Qixiang et al., 2010; Zhao Xiaodong et al., 2014; Zhang Zhihuan et al., 2014; Zhao Zijun et al., 2015; Li Qianqian et al., 2017; Xu Youde, 2019). Due ...

AI Technical Summary

Problems solved by technology

However, the current understanding and research on biodegradable heavy oil mainly focus on the genetic mechanism, and there is no fast and effective technical method to describe its range (Li et al., 2005; Yu Qixiang et al., 2010; Zhao Xiaodong et al., 2014; Zhang Zhihuan et al., 2014; Zhao Zijun et al., 2015; Li Qianqian et al., 2017; Xu Youde, 2019)

Deep biodegradable heavy oil reservoirs are transformed into normal crude oil reservoirs due to multi-stage oil and gas charging, but the biomarker compounds of crude oil still retain their biodegradation characteristics, which makes it more difficult to characterize the range of biodegradable heavy oil reservoirs , cannot rely on the mass chromatogram of crude oil for complete calibration (Xiao, 2014; Li et al., 2015)

Images