摘要
陆梁油田陆9井区白垩系呼图壁河组发育着一类特殊的薄层透镜体底水型油藏,该类油藏水平井受油层厚度薄、含油性差、油藏幅度低、油水分布复杂、底水比较活跃等因素的影响,实际生产井生产特征表现出无水采油期短、含水率上升速度快、产量递减大的特点。针对上述问题,在对研究区地质基本特征研究的基础上,结合实际生产井开发特征,综合应用地质、测井、油藏工程、数值模拟等多学科理论及方法,深入分析了薄层底水油藏水平井开采特征。明确了影响薄层底水油藏水平井开采特征的主要因素为油层厚度和水平段长度,确定了不同油层厚度的合理水平段长度;分析验证了该类油藏水平井注水开发效果明显好于天然能量开采。研究认识为类似油藏水平井后续开发、治理提供了技术依据。
The specific thin layer lens bottom water reservoir develops in Hutubihe formation of Cretaceous of Lu-9 well block in Luliang oilfield, whose horizontal wells are affected by factors of thin oil layer, bad oil-bearing capacity, low amplitude reservoir, complex oil and water distribution, and active bottom water, in addition, production characteristics are short water free production period, fast rate of water cut increase and rapid production decline in actual production wells. According to the above problems, based on the study of basic geological characters and combined with characters of production wells, this paper comprehensive uses scientific theory and methods of geology, well logging, reservoir engineering and numerical simulation, and deeply analyzes exploi- tation characters of horizontal wells in thin layer bottom water reservoir, therefore it is concluded that, the main factors to influence exploitation characters are reservoir thickness and horizontal section length, accordingly, the reasonable horizontal section length of different reservoir thickness are determined, furthermore, the research verifies that the effect of waterflood development of horizontal wells is superior than natural energy production. The study can provide technical references for follow up development of horizontal wells in similar reservoir.
出处
《油气藏评价与开发》
CSCD
2016年第6期37-44,共8页
Petroleum Reservoir Evaluation and Development
基金
中国石油天然气股份公司"新疆大庆"重大科技专项"砾岩油藏提高采收率技术研究与应用"(2012E-34-08)
关键词
陆9井区
呼图壁河组
薄层底水油藏
水平井
开采特征
数值模拟
Lu-9 well block, Hutubihe formation, thin-bedded and bottom-water reservoir, horizontal well, exploitation characters, numerical simulation
