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Relationships between hydrocarbon productivity and characteristics of shallow-water and coarse grain braided river delta deposit microfacies ———Taking Yanqi Basin Baolang oilfield as an example(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2004年第04期
Page:
37-40
Research Field:
Publishing date:

Info

Title:
Relationships between hydrocarbon productivity and characteristics of shallow-water and coarse grain braided river delta deposit microfacies ———Taking Yanqi Basin Baolang oilfield as an example
Author(s):
XIE Hui
Geological Logging Company , Henan Petroleum E xploration Bureau , Henan Nanyang 473132 , China
Keywords:
shallow-water ; braided river delta ; deposit microfacies ; hydro carbo n pro ductivity ; Xinjiang
PACS:
P618.13
DOI:
-
Abstract:
Relatively to common delta and fan-delta , these studies mainly concentrate on the braided river with high slope drop and less study is given to braided channel delta and the braided river with low slope drop.Hydrocarbon-bearing intervals in Baolang Oilfield in Yanqi Basin are typical shallow-water, gentle slope type coarse grain braided river delta-lacustrine deposit systems .Reservoir component maturity and structural maturity are low ;granularity probability curve is characterized with drag and suspension, and is divided into twelve kinds of lithofacies with genesis significance.These shallow-water delta ty pes may be divided into three subfacies tracts by using Coleman Programs: the upper delta plain above the flood line), the lower delta plain between depleted water line and flood water line)and submerged delta plain below the depleted water line).Distributary channel microfacies submerged), distributary interbasin microfacies submerged), crevasse channel fan)microfacies, overflow deposit microfacies, lakeshore paludal deposit microfacies have been mainly developed in research area.The microfacies in debouch bar is no t developed.Distributary channel microfacies submerged)are 90% of reservoirs in research area and may be further divided into 3 basic types:filling channel, abandoned channel and progradational channel according to the varying laws of petrographical assemblage of sand bodies, scorn degree and water flow rate.In one single well , reservoir physical properties in abandoned channel are the best and hydrocarbon productivity is the highest , the second is in filling channel, and the relatively poor are in progradational channel and overflow channel .

References:

[1] 薛良清 , W E Galloway.扇三角洲 、辫状河三 角洲与三 角洲体 系的分类[J] .地质学报 , 1991 , 252):23 ～ 29.
[2] Maill A D.Reservoir heterogeneities in fluvial sandstones :lesson f rom outcrop studies[J] .AAPG bulletin ,1988 ,726):682～ 697.
[3] 赵翰卿 .大型河流 —三角洲沉积储层精细描述方法[J] .石油 学报 , 2000 , 214):109 ～ 113.
[4] 楼章华 .地形 、气候与湖 面波动对 浅水三角 洲沉积环 境的控 制作用[J] .地质学报 , 1999 , 731):83 ～ 91.
[5] Revenne C .Heterogeneit y and geomet ry of sediment ary bodi es in f luvial delt aic reservoir[J] .SPE , 1989 , 646):239 ～ 246.
[6] Coleman J M , Prior D B .Delt aic envi ronment s of deposi tion , in Sandst one deposit ional environments [M] .AAPG Memoir 31 , 1981.139 ～ 169.
[7] 姚光庆 .浅水三角洲分流河道砂体储 层特征[J] .石 油学报 , 1995 , 161):24 ～ 31.

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Last Update: 2004-12-20