井眼轨迹与钻遇地层关系的随钻测井解释研究

在以水平井为主要开发手段的油藏中,为了提高水平井段有效储层的钻遇率,就必须搞清楚井眼轨迹在地层中的走向及其空间产状,必须根据测井资料对井眼轨迹与钻遇地层的接触关系进行精细解释与分析。本文以东方区块测有随钻测井资料的E3hb和E5h两口水平井为例,基于水平井随钻测井解释的方法原理,采用井眼轨迹、地层剖面和测井曲线综合成图技术对实钻的井眼轨迹与地层的各种接触关系与特点进行了精细解释与描述。应用表明,该技术可以及时监测井眼轨迹在导向标志层和目的层中的钻遇情况,有助于现场实施地质导向钻井。

LOGGING WHILE DRILLING INTERPRETATION STUDY ON THE RELATIONSHIP BETWEEN BOREHOLE PATH AND DRILLED FORMATION

In reservoirs that horizontal well is the primary development means, in order to improve the effective probability of penetration in the horizontal interval of the reservoir, trend of the borehole path in the formation and space occurrence must be made clear. Contact relation between the borehole path and drilled formation must be interpreted and analyzed precisely according to the logging data. Taking two horizontal wells E3hb and E5h with logging while drilling data in the oriental region as an example, based on the interpretation methods and principles to horizontal wells, integrated plotting technology of borehole path, strata profile and well logs is adopted to interpret and describe the contact relation between the drilled borehole path and the strata. The application shows that this method can monitor the drilling meet condition in the guide marker and target zone, it is helpful to the field geosteering drilling.