For decades, yes.Oil casingThe research of damage has never stopped, and the oil fields of various countries have invested huge manpower and material resources to study. The forms, causes, numerical simulation, measurement methods, mechanism and prevention of casing damage have been studied from different angles such as petroleum geology, reservoir engineering, material science and engineering, rock mechanics, material mechanics, geomechanics, seepage mechanics and corrosion electrochemistry.

but dueOil casingBecause of the complexity of the failure problem, the above research is generally carried out for a certain oil field, block and specific well conditions, and the numerical simulation is often based on the finite element analysis of a small local area around a single well, which lacks multidisciplinary and large-scale overall consideration of the above problems, and because many problems in the failure of oil casing seem to be more suitable for analysis by numerical simulation, so far, no one has summarized people's experience and knowledge of casing failure analysis for decades and carried out expert system treatment. Therefore, the current treatment of casing damage is still ineffective, and oil field casing damage still occurs frequently, which has become a major problem restricting the development of oil fields. Oil casing damage is commonly referred to as casing damage and casing deformation in the field of petroleum engineering. Oil casing failure refers to the oil field production process, due to engineering, geological, production dynamic changes and other factors, the load on the casing exceeds the bearing capacity of the casing, the casing deformation, rupture, dislocation and other forms of damage. In the process of oil and gas field development, especially in the middle and late stages of oil and gas field development, the damage of oil casing is a chronic disease that plagues the development of petroleum industry in China and even in the world. It is also one of the key issues affecting the development of the oil industry and improving its efficiency.

Therefore, it is very important to correctly find out the main cause of oil casing failure as soon as possible and correctly judge the failure mechanism of oil casing from a large number of complex data and processes such as oilfield geology, engineering, design, construction, production development and workover. However, the early research and judgment on the cause and mechanism of oil casing damage were done by experts in this field. In recent years, with the development of computer technology, the wide application of finite element method, and the deepening of human understanding of rock mechanics, seepage mechanics and elastic-plastic mechanics, numerical simulation is increasingly used to analyze casing failure in some casing deformation analysis, forming a way of knowledge analysis and numerical analysis. Partial waste in any way can not completely solve the problem of oil casing damage. However, areas where knowledge analysis is the main method or even if numerical analysis can be used, numerical analysis cannot solve all problems, which happens to be the world where expert systems can demonstrate their capabilities.

So far, the study of oil casing failure basically stays in the knowledge analysis or numerical analysis of the failure form of a single casing, and no one is engaged in the establishment of a fast expert system that can cover the entire oil field and conduct a unified analysis and treatment of all oil casing failure problems. The establishment of an expert system covering the whole oil casing damage is of great theoretical and practical significance to the treatment of casing damage in our country and even in the world. The analysis of oil casing damage mechanism is a complex, arduous and creative work. It is a system engineering involving oil field geology, drilling engineering, the formulation and adjustment of the overall development plan, and the adoption of production measures; preventing, delaying and solving the problem of oil casing damage is the core. This work also has important guiding significance for the geological and engineering design of new well construction, the adjustment of oil field development plan and the formulation of production measures. The oil casing fault detection system can be constructed quickly, which provides convenience for oil casing fault monitoring.