Recognition of Accretion of Sand Bodies in Single Mouth Bar Based on Horizontal Well Data

doi:10.11885/j.issn.1674-5086.2015.12.23.01

Abstract

Abstract: A distant well spacing is often allocated for offshore oilfield due to the geographical restrictions. Consequently, the characterization of such underground reservoir structures with the current overlay method for multi-well models used mainly under dense-well pattern conditions usually achieves a poor precision. Therefore, based on a large number of horizontal well data of X Oilfield in Bohai Bay, we did the research on characterizing such debouch bar reservoir structures:Horizontal section which is always drilled in the inner debouch bar can meet the debouch bar accretion sand bodies when drilled laterally. So, we used the scale statistic data of the drilled accretion sand bodies to guide the characterization of accretion sand bodies. With using the method in X Oilfield in Bohai Bay, it shows that the length of horizontal interval is always between 240-320 m, and there are 3-6 stages of lateral accretion interbed (overlay surface). This study has not only a significantly economic value in efficiently developing reservoirs of offshore oilfield where there is a lack of multi-well models data and test data, but also guiding significance for similar onshore oilfields in characterizing lower level structure elements.

Key words: large hole spacing, the debouch bar, reservoir architecture, horizontal well, accretion sand bodies

CLC Number:

TE122

ZHANG Rui, LIAO Xinwu, LIU Zongbin, ZHANG Xuefang, SI Shaohua. Recognition of Accretion of Sand Bodies in Single Mouth Bar Based on Horizontal Well Data[J]. 西南石油大学学报(自然科学版), 2016, 38(6): 81-89.

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