文章基本信息

标题：Study on the Distribution of Interlayer in Thick Sandy Braided River under Large Well Spacing—A Case of C Oilfield in Bohai Sea
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作者：Wentong Zhang ; Bo Quan ; Songru Mu 等
期刊名称：Open Journal of Geology
印刷版ISSN：2161-7570
电子版ISSN：2161-7589
出版年度：2022
卷号：12
期号：6
页码：460-471
DOI：10.4236/ojg.2022.126022
语种：English
出版社：Scientific Research Pub
摘要：Using core, logging and other data, combined with field outcrop deposition, this paper studies the sedimentary genetic types and sedimentary stages of thick sandy braided river interlayer in C oilfield, and divides two stages of interlayer and three single-stage braided flow zones. On this basis, geostatistical inversion constrained by logging and discerning River quantitative knowledge base is carried out to predict the distribution range of the main interlayer in the two phases. The production performance test of the blind well and horizontal well shows that the coincidence rate of the prediction results of interlayer with thickness > 1.5 m is 75%. The research shows that the first stage is the main interlayer, mainly composed of mudstone of flood plain origin, with an average thickness of 2.1 m and relatively stable distribution. Based on the interlayer prediction results, the small layer of composite sand body 1 forms a residual oil enrichment area in the high part of the structure due to the wide range of interlayer shielding in the lower part, which is a favorable area for adjusting and tapping potential.
关键词：Bohai OilfieldBraided RiverHorizontal WellGeostatistical InversionInterlayer Prediction