Superimposition patterns of underwater distributary channel sands in deltaic front and its control on remaining oil distribution:a case study from K1q4in J19 block, Fuyu oilfield

Feng Congjun; Bao Zhidong; Dai Chunming; Zhang Zhaoqian

doi:10.11743/ogg20150116

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Superimposition patterns of underwater distributary channel sands in deltaic front and its control on remaining oil distribution:a case study from K₁q⁴in J19 block, Fuyu oilfield
Vol. 36, Issue 1, Pages: 128-135(2015)
Online First：08 February 2015，

Published：2015
DOI： 10.11743/ogg20150116
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DOI：

Feng Congjun, Bao Zhidong, Dai Chunming, et al. Superimposition patterns of underwater distributary channel sands in deltaic front and its control on remaining oil distribution:a case study from K₁q⁴in J19 block, Fuyu oilfield[J]. 2015, 36(1): 128-135. DOI: 10.11743/ogg20150116. DOI：

摘要

以松辽盆地扶余油田J19区块泉头组四段为例，在沉积微相研究的基础上，综合应用岩心、测井、生产动态等资料，对三角洲前缘复合水下分流河道内部的单砂体进行定量识别。研究结果表明，研究区单砂体叠置类型主要包括分离式、叠加式、切叠式、替代式4种垂向叠置样式和间湾接触、堤岸接触、对接式、侧切式、替代式5种平面接触样式，并总结了相应的识别标志。研究区单砂体宽度介于200~800m，单砂体厚度介于4~8m。分离式的叠置砂体顶部剩余油富集；叠加式、切叠式、替代式（垂向）叠置类型的砂体厚度不同、注水方向不同，对剩余油分布范围有较大影响。间湾接触、堤岸接触、对接式的砂体横向不连通，在两个单砂体之间易形成侧翼剩余油富集；侧切式和替代式的砂体，横向连通性好，剩余油不易富集。

Abstract

Taking the fourth member of the Quantou Formation in J19 block of Fuyu oilfield as an example

single sandbodies identification was performed within composite underwater distributary channels in delta front by integrating various data including cores

logging and production performance on the basis of sedimentary micro-facies.The results show that there are four main vertical superimposition patterns of single sandbodies

including separated type

overlap-type

overlay type and substitution type

and five lateral contact patterns

including interdistributary contact

embankment contact

butt-joint

side shear and substitution type.The corresponding identification marks are also summarized.The width of single sandbody is in the range from 200-800m and their thickness range from 4-8m.The tops of the separated type sandbodies are rich in remaining oil.In overlap-type

overlay type and substitutional type sandbodies are different in thickness and water injection direction

thus strongly influencing remaining oil distribution.Sandbodies of interdistributary contact

embankment contact and butt-joint kinds are not interconnected laterally

thus remaining oil possibly occurring in the flanks of the sandbodies.In contrast

sandbodies of side shear and substitutional type are well connected laterally

unfavorable for enrichment of remaining oil.

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Hierarchical subdivision and origin of single sandbody in the reservoirs of meandering river facies in the Yangdachengzi Formation of Fuyu oilfield

Single sand body identification in compound distributary channel of delta plain:a case study from the fourth member of Quantou Formation in the southern part of central Fuyu oilfield

Architecture of channel reservoirs of shallow-water delta in the 4th member of Cretaceous Quantou Formation in southern Sanzhao Sag, Songliao Basin

DISTRIBUTION OF REMAINING OIL IN SHA-2 MEMBER OF PUCHENG OILFIELD

CHARACTERISTICS OF MICROFACIES AND DISTRIBUTION OF REMAINING OIL IN UPPER MEMBER OF GUANTAO FORMATION FROM GUDAO AND GUDONG OILFIELDS