Southwest Petroleum University

Sichuan Highway Planning, Survey, Design and Research Institute Ltd

Institute of Mountain Hazards and Environment, Cas

Heavy Oil Development Institute, Liaohe Oilfield Exploration and Development Research Institute Petrochina Oilfield

Dong Wang

Peng Li

Qiang Yu

Qi Jiang

Siyuan Huang

Zhibin Wang

Huayong Chen

Yang Jia

Yu Lei

Junwen Peng

Shengfu Li

Changhao Hu

Yonggang Ge

Yixin Wang

Zhongyuan Wang

Changfeng Liu

Lu Sun

Huilong Pu

The present disclosure relates to the field of early warning for geological disasters, and discloses an early warning method for icefall-caused moraine lake outburst disasters, which aims at solving the problems of low early warning precision and difficulty in implementation in an early warning solution of the prior art. The method includes: S1, calculating topographic parameters of moraine lakes and upstream glaciers thereof, and filtering a moraine lake to undertake focal monitoring; S2, calculating a freezing-thawing cycle index and a regional accumulated temperature index of an upstream glacier region for the moraine lake to undertake focal monitoring, S3, calculating a catastrophic climate determination factor T, wherein if the catastrophic climate determination factor Tsatisfies a corresponding catastrophic climate determination condition, an early warning condition is satisfied, otherwise the early warning condition is not satisfied; and S4, implementing early warning.

Early warning method for icefall-caused moraine lake outburst disasters

A method for injecting non-condensable gas or application of in-situ combustion to recover remaining oil in a heavy oil reservoir with bottom water includes: drilling a new horizontal well in an oil layer between the existing horizontal production well location and the bottom water layer; preheating the new horizontal well; after the horizontal section of the horizontal well is in thermal communication with the upper steam/gas chamber, performing gas injection in existing wells to maintain pressure slightly higher or similar to the pressure of the bottom water layer, and converting the horizontal well into a continuous production well; drilling a vertical well in the unswept reservoir area; establishing a fluid communication in the oil layer between the vertical well and the horizontal well, injecting air or oxygen into the vertical well; and in the later stage of the horizontal well, stopping gas injection and gradually reducing the pressure in the steam/gas chamber.

Method for injecting non-condensable gas or in-situ combustion to recover remaining oil in a heavy oil reservoir with bottom water

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Chengdu, China

Dong Wang