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Research on Fine Engraving Technology of Abandoned Channel and Point Dam Sands Inside Curved Channel Sands in Underground Reservoirs of Large Sandstone Oilfields

Yanchang Su, Xiuling Pei, Jiantao Du, Zhichen Zhou

Abstract


Aiming at the difficult problem of describing the abandoned river channel and point dam sand body under the condition of dense
well network in the late stage of extra-high water content, applying the core, logging and dynamic production data, and adopting the method
of “discussing the present and discussing the past, and predicting the model”, the modern deposition clarifies that there are 4 types of abandoned river channel: the neck-cutting type, the breach and diversion type, the scaled abandonment, and the gully abandonment. The method
summarizes 3 types of small, medium and medium-large point dam sands, and realizes the fine depiction of abandoned channels and point
dam sands by using modern deposition as a guide, and finely depicts that the abandoned channels in the study area are mainly of the scale and
rerouting type, and the point dam sands are mainly of the medium type, and the method is able to accurately depict abandoned channels and
point dam sands and the results of the depictions provide a precise description of underground meanders in the large sandstone oil fields. The
results of the description provide a geological basis for the accurate dredging of the remaining oil in the sand body layer of large sandstone
oil fields.

Keywords


Abandoned River Channel; Point Dam; Hydrodynamics; Sand Body Delineation

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References


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DOI: http://dx.doi.org/10.18686/ag.v8i1.12579

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