›› 2019, Vol. 40 ›› Issue (3): 1-1.doi: 10.7657/XJPG20190302

   

A Study on Differentiated Oil-Bearing Controlling Factors and Distribution Patterns of Continental Tight Oil Reservoir

YAN Lin1, YUAN Dawei1, CHEN Fuli1, GAO Yang2, WANG Shaojun1, CHENG Fucheng1   

  1. (1.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing100083, China; 2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China)
  • Online:2019-06-01 Published:1905-07-17

Abstract: The oil-bearing properties of continental tight oil reservoir are characterized by decentralized distribution, wide range and big differences. Based on the comparative analysis on controlling factors of oil-bearing properties of source rocks, reservoir and the relation between source rock and reservoir, the paper reveals the distribution rules of Chang 7 tight oil in Ordos basin, Lucaogou tight oil in Junggar basin and Fuyu tight oil in Songliao basin. Using porosity and permeability measurement, core observation, logging interpretation and dynamic analysis, the paper identifies the general law of continental tight/shale oil that reservoir physical property is controlled by lithology and the oil-bearing property is controlled by reservoir physical property. The overlapped areas of prevailing microfacies and diagenetic facies are generally the enrichment areas of tight oil, based on which differentiated distribution patterns are established for the typical tight/shale oil in China. The study results can guide well deployment and horizontal well trajectory design and obvious effects have been gained

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