摘要
安塞油田长611-2小层是主力开采油层,总体连片性较好、稳定性较强。但是细分到单砂体上,发现单砂体稳定性差,变化较快,常有尖灭,且单砂体间泥质夹层发育。这些特征说明建立一套单砂体划分方法、研究单砂体结构形态具有重要意义,单砂体研究可以给改善油藏开发效果提供新的思路。以长611-2小层为对象,通过野外露头和井下对比,研究单砂体形成背景及规律,建立了单砂体划分方法。划分标准以GR曲线为核心,划分界限为0.4~0.5(归一化值,无量纲)。
Chang61^1-2 layer is the primary production layer of Ansai oilfield, with great overall continuity and stability. However, single sandbodies are not as stable and there＇s rapid change and pinch out, with mud layer or carbonate layers imbedded in sandbodies. These character put forward the necessity of establishing a method to classify and analyze the structure of sandbodies, and this work would provide new perspective in improving develop- mental result. This paper took Chang61^1-2 as the object of study, and analyzed the back- ground and law of sandbody formation through outcrop observation and well data comparison, amt established the classification method of sandbodies. This method mainly based on GR logging data, with the normalized boundary value of 0.4-0.5.
出处
《石油化工应用》
CAS
2014年第1期62-64,73,共4页
Petrochemical Industry Application
基金
国家重大专项:低渗透油藏中高含水期稳产配套技术
项目编号:2011ZX05013-005
