Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (3): 694-703.doi: 10.13278/j.cnki.jjuese.20200084

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Comprehensive Evaluation Method for Oil and Gas Transmission Capacity of Oil Source Fracture Dominant Channel in Oil and Gas Accumulation Period and Its Application

Yuan Hongqi, Wei Minglu, Yu Yinghua   

  1. Geoscience College, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
  • Received:2020-04-22 Online:2021-05-26 Published:2021-06-07
  • Supported by:
    Supported by the Higher Education Reform Foundation of Heilongjiang (SJGY20180072),the Education Cooperation Foundation of the Ministry of Education (201902302045),the National Natural Science Foundation of China (41572126) and the National Special Project for Large-Scale Oil and Gas Field and Coal-Bed Methane Development (2016ZX05006-005)

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Abstract: Based on the relative size distribution of the ancient activity rate in the different parts of the oil source fault during the hydrocarbon accumulation period, its dominant channel for transporting oil and gas was determined. Based on the fracture activity rate, the ancient dip angle, the paleo-burial depth of the target layer, and the paleo-remaining stratum pressure of the dominant transport channel, the comprehensive evaluation method of the oil and gas capacity of the oil source fault dominant channel during the hydrocarbon accumulation period was established, and applied to the comprehensive evaluation of the oil and gas capacity of the dominant channel in the middle and lower sub-members of the third member from Shahejie Formation in Daliuquan area of Langgu depressions in Bohai Bay basin. The results show that ten dominant channels developed during the sedimentary period of the six branch faults of the oil-bearing faults of the Jiuzhou oil source. The oil and gas transport capacity is relatively strong in the six dominant channels of F1 and F2 faults. Four dominant channels developed in F3, F4, F5 and F6 fractures developed, and their oil and gas transport capacity is relatively weak and not conducive to oil and gas migration. This evaluation result is consistent with the current status of oil and gas distribution in the middle and lower sub-members of the third member from Shahejie Formation in the vicinity of the Jiuzhou fault. This indicates that the method is feasible for comprehensive evaluation of oil and gas transport capacity of the dominant channel during the accumulation period of the oil source faults.

Key words: oil and gas accumulation period, oil source fracture, dominant channel, transporting oil and gas capacity, comprehensive evaluation method, Bohai Bay basin

CLC Number: 

  • P618.13
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