Well drilling jamming risk early warning method and system based on historical data of adjacent wells

Abstract

The invention provides a drilling jamming risk early warning method and system based on historical data of adjacent wells, and the method comprises the steps: carrying out the statistics of the real-time logging data of each historical well in a block where a target well is located, and the corresponding drilling risk recording data; based on the arranged real-time logging data statistics, drawing a drill bit depth and hanging load data scatter distribution diagram corresponding to each drilling working condition; reversely drawing a density thermodynamic diagram reflecting hanging load data aggregation corresponding to different drill bit positions of a historical well based on the density thermodynamic diagram; according to the collected real-time logging data of the target well, the density thermodynamic diagram corresponding to the working condition of the target well is used for analyzing and judging the drilling tool jamming risk of the target well in the set time. According to the scheme, implementation is carried out according to the historical well logging data and the risk record data which are easy to obtain, indirect model calculation of key parameters is avoided, the problems of insufficient accuracy and low prediction efficiency in the prior art can be solved, in addition, the early warning method can visually reflect the drilling tool sticking risk of the target well, and missing report and false report are further avoided.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration engineering, in particular to a drilling sticking risk early warning method and system based on historical data of adjacent wells. Background technique [0002] With the continuous deepening of exploration and development, the difficulty of oil and gas exploration and development is getting higher and higher, the geological conditions are becoming more and more complex, the buried depth of reservoirs is increasing, and drilling engineering is facing more and more complex situations, resulting in the amount of resources required to deal with drilling risks and accidents. And the cost is getting higher and higher. To achieve safe drilling is the primary goal of the drilling industry. Therefore, it is necessary to use reliable technical means to warn of construction risks during the exploration process, especially the risk of pipe sticking during the drilling process. [0003] Controlli...

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Problems solved by technology

[0003] Controlling drilling risks during drilling operations has always been the focus of industry research. Although based on existing research, theoretically relying on calculation models related to key parameters such as formation pressure, wellbore pressure, and frictional torque can carry out early warning analysis of drilling downhole risks. However, key parameters such as downhole formation pressure, wellbore pressure, and frictional torque, which are directly related to the risk of drilling sticking, cannot be directly measured by sensors during the drilling process, and can only be indirectly calculated by using numerical calculation models or gray correlation methods based on surface logging data. It is then applied to early warning of stuck pipe risk. Since these calculation models have many assumptions at the beginning of establishment, there are deviations from the real downhole environment. At the same time, factors such as downhole high-frequency vibration, high temperature and high pressure, and drilling fluid flow will directly restrict the use of sensors. It is difficult to guarantee the reliability of the obtained results by obtaining the downhole condition parameters, which will affect the accuracy of the risk early warning results

[0004] In the existing technology, there are also a large number of exploration projects that use critical thresholds for discrimination, but the problem of low early warning accuracy and high false alarm rate inevitably occurs. Correspondingly, the identification of the stuck pipe risk at the drilling site can also rely on the on-site driller Engineers and a small number of personnel have previous experience, but this identification method is too dependent on professionals, and it is inevitable that there will be misjudgment and untimely handling, and the rate of false positives and false positives remains high. The reference value of personnel is low and cannot well meet the requirements of safe drilling in the field

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