摘要
曲流河道砂体是大庆喇萨杏油田厚油层的主要河流类型之一，储量占各类河道砂的50％以上，是特高含水期控水挖潜的主要方向。从各种研究结果来看，河道砂体内的剩余油主要存在于厚油层层内，且与水淹段呈相间分布。针对喇萨杏油田特高含水期曲流河砂体剩余油分布复杂、识别与描述难度大等问题，通过对近年完钻的大量密闭取心检查井资料的逐井逐层综合分析，并结合数值模拟和物理模拟等手段，研究了曲流河砂体平面废弃河道、河问砂（泥）等沉积微相及层内侧积夹层分布和韵律组合方式等对剩余油分布的控制作用。在此基础上，建立了特高含水期曲流河砂体平面、层内及微观3个层次剩余油分布模式，并通过水平井、层内细分调整等方式对曲流河砂体剩余油进行挖潜，取得了较好的效果。
Meandering channel sandbody is one of the main fluvial sandbodies in the thick oil reservoirs in Lasax- ing Oilfields, and its geological reserve is more than 50% of the total channel sands, which is the major potential- tapping target for water control at the period of extra-high water cut. The results of all kinds of studies show that the remained oil within the sandbodies is mainly located in the thick reservoirs, and moreover distributed ahernativly with the waterflooded intervals. As to the problems such as the complexity of the remained oil distribution, difficul- ties of the oil description and so on, the controlling actions of the sedimentary mierofaeieses { such as the planar a- bandoned channels, interchannel mud and so on } , lateral accretion, rhythm combinations and so forth of the sand- bodies over the distribution of the remained oil are researched with the help of the comprehensive well-by-well and layer-by-layer analyses of a great amount of currently drilled sealed core data from the inspecting wells and furthermore the methods of the numerical and physical simulations etc.. On the basis of the above, the patterns of the re- mained oil distribution for the planar, interlayered and micro-scale sandbodies at the period of extra-high water cut are established, and moreover through horizontal wells, finely adjustment within the reservoirs etc. , the potentials of the oil are tapped and much better results are obtained.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第6期58-62,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重大科技专项“大型油气田及煤层气开发高含水油田提高采收率新技术”(2008ZX0510)
“大型油气田及煤层气开发科技重大专项示范工程”(2008ZX05052)
关键词
特高含水期
曲流河
废弃河道
侧积夹层
剩余油
extra-high water-cut period
meandering river
abandoned channel
lateral accretion/laterally deposi- ted interbed
remained oil
