渤南油田义65区块开发后期沉积相再认识

doi:10.11743/ogg20140313

Abstract

Abstract:

The major pay zone of Yi 65 block in Bonan Oilfield,a low permeability reservoir in production over 30 years,is the 9^th sand unit of the 3^rd Member of Shahejie Formation(Es³⁽⁹⁾).Nowadays,Yi65 block is at the later production stage.Based on the core,geologic,well logging and production data,we restudied the sedimentary features and microfacies of the major pay zone in the study area.The results show that it is turbidite fan deposit,and can be further divided into three subfacies(inner fan,mid-fan and outer fan)and several microfacies.We described the subfacies and microfacies and mapped the distribution of the sedimentary microfacies of each sublayer.The mid-fan is the main part of the turbidite fan in the study area,and can be further divided into braided channel,inter-braided channel,lateral wing of braided channel and lobes.Reservoirs of the braided channel and lobes are best developed.On plane view,the braided channel occurs in the central part,with the inter-braided channel,lateral wing of braided channel and lower fan occurring successively outwards.The lobes occur at the end of some braided channel.And the briaded channels are of SN-trending or SE-NW-trending.

Key words: turbidite fan, sedimentary characteristics, sedimentary facies, low permeability reservoir, Yi 65 block, Bonan oilfield

CLC Number:

TE121.3

Gao Buoguo, Xu Fugang, Xu Tao. New understanding of sedimentary facies of Es³⁽⁹⁾ in Yi 65 Block of Bonan oilfield at later stage of production[J]. Oil & Gas Geology, 2014, 35(3): 386-390.

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New understanding of sedimentary facies of Es³⁽⁹⁾ in Yi 65 Block of Bonan oilfield at later stage of production

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New understanding of sedimentary facies of Es3(9) in Yi 65 Block of Bonan oilfield at later stage of production

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New understanding of sedimentary facies of Es³⁽⁹⁾ in Yi 65 Block of Bonan oilfield at later stage of production