井斜轨迹对储层构型及其油水分布研究的影响  

Influence of well deviation trajectory on reservoir architecture and its distribution of oil and water

作　　者：吴林 陈清华[1] 肖斐 高峰[2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石化江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《油气地质与采收率》2014年第2期75-79,116,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家油气重大专项"煤层气开发技术经济评价"(2009ZX05042-001);国家油气重大专项"海外油气新项目快速评价方法研究"(2008ZX05028-005-01)

摘　　要：目前储层构型研究尚处于发展阶段,其对测井资料的依赖程度较高,特别是井斜轨迹对储层构型研究的影响较大。在井斜轨迹推算的基础上,推导出储层构型单元真厚度的计算公式,同时选取Miall关于储层构型分类方案中的四级(或五级)储层构型单元作为研究对象,探讨井斜轨迹对储层构型及其油水分布研究的影响。结果表明,井斜轨迹易混淆对储层构型单元顶、底界面的识别;影响储层构型单元真厚度的测算结果,其模式可分为储层构型单元水平、储层构型单元水平且井斜轨迹穿过断层、储层构型单元倾斜且倾向与井斜轨迹倾向相同、储层构型单元倾斜且倾向与井斜轨迹倾向相反共4种,进而造成储层构型单元有效厚度解释偏差或油水分布关系认识不准确等情况。为了准确进行不同层次的储层构型研究,须考虑井斜轨迹的影响,由粗入细、逐步分析,最终确定各级储层构型单元的油水分布规律。Reservoir architecture is currently in the stage of development,and subsurface reservoir architecture is highly dependent onwell logging data,so well deviation trajectory is of great significance to it.Based on calculation of well deviation trajectory,this paperproposes the formula of true thickness of reservoir architecture unit,taking the 4th(or 5th)reservoir architecture unit in Maill's classifi-cation as study object.Studies have shown that well deviation trajectory would be misleading to identify all levels of reservoir architec-ture unit's top or bottom surface and make the calculation results of reservoir architecture unit's true thickness too large or too small infour different modes,including horizontal reservoir architecture unit,horizontal reservoir architecture unit when well deviation trajecto-ry drill through fault,inclined reservoir architecture unit when its inclination is opposite with well deviation trajectory's inclination,in-clined reservoir architecture unit when its inclination is same with well deviation trajectory's inclination; well deviation trajectory alsobrings about the wrong understanding of effective thickness and distribution of oil and water of the reservoir architecture unit.In orderto grasp the reservoir architecture in different levels accurately,it is necessary to take into account of the impact of the well deviation trajectory step by step,from rough to detailed,and ultimately to provide effective guidance forl ater period of oilfield development.

关 键 词：井斜轨迹 储层构型 储层构型单元 真厚度 油水分布 

分 类 号：TE133[石油与天然气工程—油气勘探]