Study On Evaluation Method Of Production Capacity Of Complex Fault Block Oilfield

Complex fault block oil reservoir is a class of very important reservoir in the development, its reserves and production has played a very important position.For the fully equipped field, the complex fault blocks are under the complex geological conditions and are difficult to mine, and recovery is low; in particular to a high water cut stage, not only the distribution of remaining oil underground is complex, but also the difficulty of exploitation increased. With L block field complex features, for example, its faults and structure is complex, and the oil block size is small, block bottom water reservoir of natural energy is sufficient; In addition, in the reservoir the characteristics and the nature of L crude oil varied greatly; there are good reservoir properties, the high permeability, and heterogeneity in the hole and other characteristics.For complex fault block reservoir formation pressure solution, there are many ways to achieve, such as Darcy’s law, second-rate pressure-the second linear scale production methods, multi-stream pressure-more production of linear fitting, etc.; but these are often not in line with ground realities. Solution of Transient Flow in formation pressure (ie pressure drop and pressure buildup test Well Test Method method) is better than the above method, more in line with the actual situation of the scene. So it is a relatively common, and useful to strike a complex faulted reservoir formation pressure method.This paper focuses on geological characteristics and the actual production site and other characteristics of high porosity and permeability of L oil field, and carry out adaptability to evaluate formation pressure and the capacity method. For formation pressure evaluation method in the unstable flow, the paper through the conversion, deformation, pressure drop presented a new method for solving the well test. This new method is more rapid, convenient, and applicabily. Another also describes the calculation of reservoir formation pressure on average-single well controlled reserves and reserve material balance method. Material balance method is the application of the more common method of calculation, but in the presence of natural water reservoir when the invasion, you must first calculate the size of water influx.In addition, in order to better position to the reservoir production, the paper also quoted the conventional method to evaluate well productivity and complex structure well productivity; and a variety of factors (such as the skin factor, the length of horizontal wells, bore wells branch number of azimuth angle directional wells, etc.) impact on the capacity were analyzed.Besides these conventional methods, this article, according to the relationship between formation pressure and formation deficit, also proposed a new evaluation method of production-single phase and multiphase flows to evaluate a new method of abortion. The method was applied to 4 wells of L oil capacity calculations, the results show that the method is fairly effective.Finally, to facilitate the calculation, analysis and evaluation of formation pressure and capacity, this calculation method of these assembly procedures, and are integrated into the software, which mak it more convenient to apply it, practicality is also stronger.