西南石油大学学报(自然科学版)

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Hydrocarbon Accumulation and Distribution in the Periphery of#br# Guangrao Buried Hill in the Dongying Sag

Gao Xia1*, Wang Jianwei2   

  1. 1. Geophysical Research Institute,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257022,China
    2. Xianhe Production Plant,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257068,China
  • Online:2015-10-01 Published:2015-10-01

Abstract:

Aiming at the research difficulty of hydrocarbon accumulation period and enrichment process in the periphery of
Guangrao buried hill in the Dongying Sag,critical moments and process of reservoir forming are analyzed in this paper. Genetic
relationship among oil-bearing blocks is determined through the methods of multi-layer oil-water interface statistical analysis
and paleohydrocarbon-water contact reconstruction. Late Guantao depositional period and late Minghuazhen depositional period
are the two critical moments of reservoir forming. Due to the limited blocking capability of the unconformities with high
sand/shale ratio,with the continuous hydrocarbon supply from the northern hydrocarbon generation sag,multi-layered hydrocarbon
reservoirs constantly adjust around the large scale unconformity surface,and a dynamic accumulation model is formed
which is characterized by gradual adjustment from north to south in multiple layers. Petroleum accumulation in the study area
should be universal and it will be of good guiding significance for petroleum exploration in the similar areas.

Key words: large scale unconformity surface, hydrocarbon accumulation period, paleohydrocarbon-water contact, dynamic
adjustment,
Guangrao buried hill

CLC Number: