Development Well Pattern Optimization Method Of Liaohe Oilfield

The process of oilfield development is a dynamic process adjusted, developed over time, new problems will emerge.Especially in the oil into the period, in order to achieve high and stable yield, improve the ultimate recovery goals, well pattern adjustment is particularly important.Well spacing density is an important index of the design and planning of development of oil field, it relates to the evaluation of oilfield development index calculation and the economic efficiency, and well pattern and well spacing size.In oil production in the late, according to the actual situation, we often need to live well pattern infilling adjustment.Especially in Liaohe geological condition is very complex, in the late stage of oilfield development, the decisive influence quality of well spacing density on development effect on.In this paper, based on the classification of Liaohe Oilfield, reservoir, evaluation of the adaptability of well network, and analyze the influence factors of infill wells from the three aspects of geology, development and economic.In consideration of various factors in the circumstances, the reasonable well spacing density is derived based on traditional economy and technology and at the same time, in order to achieve the optimal principle of dynamic economic analysis, comprehensive consideration of oil prices and rising costs of factors, in the pursuit of sustainable development of oil field and the profit maximization principle, application of optimization theory and economics theory for the first time to discuss and three kinds of constraints is established, and the optimal well pattern, economic limit well pattern and well spacing and other decision variables on a single type or mixed type reservoir makes the optimization model of well network optimal system arrangement.The application examples show that the optimization model can well network encryption boundaries correctly predicting, have scientific rationality, the optimized model is applied in the current prices of different types of reservoirs in Liaohe Oilfield, calculate the reasonable well pattern density.To further clarify the oil infilling adjustment potential in the current development and economy, has an important guiding significance for the preparation of future old area adjustment and Liaohe oilfield development programming.