三角洲平原复合分流河道内部单砂体划分——以扶余油田中区南部泉头组四段为例

doi:10.11743/ogg20120110

Abstract

Abstract:

Taking the fourth member of Quantou Formation(K₁q⁴) in the southern part of central Fuyu oilfield as an example,we systematically identified single sand bodies in the compound distributary channels of delta plain based on study of sedimentary microfacies with integrating various data including cores,well logging and production performance.The results show that K₁q⁴ has well-developed large interconnected and banded compound distributary channel sand bodies of various origins in the study area.Detail characterization of single sand bodies reveals that there are 6 main superposition patterns,including multi-layers,overlapping,multi-boundaries,single-boundary,juxtaposition and isolation.Moreover,8 types of logging-facies marks of single sand bodies are identified for vertical timing and lateral boundary identification.The dense well pattern and small well spacing data in the study area are used to establish a quantitative prediction model for the width-thickness ratio of single sand bodies.By using this model,totally 44 single sand bodies of low sinuous meandering type are recognized in the 5^th to 10^th layers of K₁q⁴.These single sand bodies show a SW-NE trending banded distribution with a width of 150-500 meters,a thickness of 2-8 meters,and a width-thickness ratio of 40-100.Tracer test results prove the accuracy of single sand body identification.

Key words: single sand body, distributary channel, abandoned channel, delta plain, Quantou Formation, Fuyu oilfield

CLC Number:

TE121.3

Feng Congjun, Bao Zhidong, Shan Qitong, Sun Mengsi, Yu Shiyan, Duan Hongzhen. 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[J]. Oil & Gas Geology, 2012, 33(1): 77-83.

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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

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