Fine Single Channel Identification Controlled by Sedimentary Facies—Taking KLA Oilfield as an Example

S. Wang, Pengfei Mu, Qiongyuan Wu, Meijia Liu, Xuefang Zhang
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Abstract

The Neogene fluvial reservoir in the Bohai oilfield is one of the leading development horizons for increasing reserves and production in the Bohai oilfield. However, the development of offshore fluvial reservoirs is faced with the problems of thin reservoir thickness, narrow plane width, rapid lateral change, and thin well pattern. Taking the KLA oilfield as an example, this paper discusses the nuanced characterization and configuration of a single channel controlled by sedimentary facies to guide developing offshore river facies’ narrow channel main control oilfield. Firstly, based on a large number of core data, the acceptable sedimentary facies identification is realized, the sedimentary model of the study area is established, the delicate calibration of logging facies and seismic facies is realized under the constraint of the sedimentary model, and a set of technical methods for nuanced reservoir characterization guided by seismic sedimentology is summarized, to realize the boundary identification of composite channel configuration and further realize the nuanced characterization of the single narrow channel. Based on this set of technology, it guides the smooth implementation of horizontal wells in the oilfield. The drilling encounter rate of the reservoir in the horizontal section of the single well exceeds 90%, ensuring the injection production connectivity and increasing the reserve production rate by more than 10%.
沉积相控制的精细单通道识别——以KLA油田为例
渤海油田新近系河流相油藏是渤海油田增储扩产的主要开发层之一。然而,海上河流储层开发面临着储层厚度薄、面宽窄、横向变化快、井网单薄等问题。本文以KLA油田为例,探讨了受沉积相控制的单一河道的精细表征和构型,为开发近海河流相窄河道主控油田提供了指导。首先,在大量岩心资料的基础上,实现了可接受的沉积相识别,建立了研究区沉积模型,在沉积模型约束下实现了测井相和地震相的精细标定,总结出了一套以地震沉积学为指导的精细储层表征技术方法;实现复合通道构型的边界识别,进一步实现单个窄通道的精细表征。这套技术指导了水平井在油田的顺利实施。单井水平段储层钻遇率超过90%,保证了注采连通性,使储采率提高10%以上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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