Beijing, September 2, 2022 /PRNewswire/ — Shale oil exploration has expanded rapidly since the early 21st century, particularly North AmericaSince 2010, marine shale oil production has grown at an average annual rate of more than 25%, making the United States the world leader in production and pegging total recoverable resources at about 20.7 billion tonnes. It has been. The development of shale oil resources has great potential to shape energy security and geopolitics. In addition to marine shale oil, countries are beginning to use lake basins for oil production.

Laxtrin shale oil reserves are considered optimal when their organic content is high and the reservoir has suitable high pressures to encourage formation. B Shale thermal maturity values ​​exceed 1.0%.of China, medium to high maturity lake shale oil is characterized by a high proportion of mature liquid hydrocarbons and mobile oils. These properties make it a valuable resource, but questions remain about production costs and recoverable quantities. Moreover, without low development costs, it remains to be seen whether these reserves can be exploited economically.

Currently a petroleum scientist led by Dr. Zhao Wenji China National Petroleum Corporation presented an evaluation of enrichment conditions and generation characteristics of lake shale oil reservoirs. China. “We have proposed a set of evaluation parameters for shale oil enrichment zones and assessed the occurrence of optimal areas. Useful as a reference.” Dr. Zhao explained the motivation behind the study, earth science frontierAlso visit our press release website: http://www.earthsciencefrontiers.net.cn/EN/news/news32.shtml

The team used data collected from medium to high maturity shale reserves currently under development. China For their analysis, they determined the optimal conditions for shale oil accumulation and the characteristics of these deposits in particular. Their analysis revealed that shale with high organic content and adequate thermal maturity favored oil retention. “The optimum organic matter content of this shale is in the range of 3–4%, with kerogens I and II appearing to be the predominant types of organic matter. Interestingly, the Ro values ​​for this shale exceeded 0.9%. Finally, these reservoirs have some degree of fragility and porosity of 3-6%.” Dr. Zhao said: In addition to these parameters, shale oil was found to have good mobility in the presence of large amounts of high quality hydrocarbons. This oil enrichment interval was highly dependent on a reservoir with a sealed roof and floor.

“What we do see is that the major enrichment of oil occurs in semi-deep to deep sedimentary zones. Furthermore, the distribution of shale oil enrichment intervals suggests that oil and gas are retained in source rocks. It is dominated by rock type because shale assemblages are the best lithofacies section, while mudstones are not.” Observe Dr. Zhao and deduce the features of these deposits.

Team locks in reserves China Nearly 16.3 billion tonnes have moderate to high maturity, of which nearly 8.4 billion tonnes may be commercially exploited. They span the Ordos, Songliao, Bohai Bay and Junggar basins and represent important energy resources. Chinese future.

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reference
Original article title: Concentration conditions and distribution characteristics of medium to high maturity shale oil in lakes China
journal: earth science frontier
Doi: https://doi.org/10.13745/j.esf.sf.2022.8.31-en

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