地层压力异常的形成与预测技术

FORMATION OF THE ABNORMAL PRESSURE OF STRATA AND THE TECHNIQUE OFITS PREDICTION

地质矿产部石油物探研究所

预测地层压力异常,是发现高压油气藏的一种有效手段,同时亦有助于减少钻井事故,提高钻井效率,指导深井钻井,确定完井方案等,因而有重要的生产意义及较高的经济价值。本文从地层沉积的机理出发,分析了压实的作用,探索了影响压实的诸因素,并对高压地层的形成及其一些特点作了叙述。文中对预测技术分别通过实例作了说明。目前,国内正在开展高压地层的分析研究和预测。因此,有必要加以强调,以引起人们普遍的重视,特别在石油普查探勘阶段。

The prediction of the abnormal pressure of strata is an effective measure in the discovery of petroleum and natural gas of high pressure. Inthe need of reducing the well-accidents, raising the working efficiency, directing the deep-well drilling and making the plan of well-completion,it has already been proved to be very useful. For this reason, it is in fact of great significance in practice and is of evident economic rewards.With the consideration of the sedimentary mechanism,the author hasmade an analysis to the effect of compact, and different factors related to it were also approached. The formation of the high-pressure strata and their characteristics were described as well. In this paper, the techniques of prediction were explained by examples concerned.At present in our country, the study of the highpressure strata and its prediction is carrying out both in theory and practice. Obviously, it is necessary to emphasize its importance and necessity in order to bring to wide attention from all sides, especially, in the period of reconnaissance.