Fragmental rock oil and gas reservoir development unit partitioning method

Abstract

The invention provides a fragmental rock oil and gas reservoir development unit partitioning method. The method is characterized in that an oil and gas reservoir with known injection-production pattern information is longitudinally and planely partitioned, so that the oil and gas reservoir is partitioned into more than two development units, the static connectivity and dynamic connectivity are analyzed for the plane partitioning, the fault properties and hydrodynamic property are further judged, the output ratio of two adjacent production wells is calculated, and finally a seepage field range and a main stream line position can be determined. Compared with the prior art, the partitioning of the development unit is in conjunction with the static and dynamic data of the oil and gas reservoir, and the partitioning of the development unit which is carried out by adopting the seepage field in the development as the unit can well conform to the real production of the oil and gas reservoir. The evaluation on the development effect of the fragmental rock oil and gas reservoir carried out on the basis of the method is more reasonable, the distribution of the residual oil is more clear and reliable, and the guidance significance on implementing the subsequent production means of the oil and gas reservoir and improving the recovery ratio can be realized.

Description

technical field [0001] The invention relates to a method for dividing development units of clastic rock oil and gas reservoirs, which belongs to the technical field of mining. Background technique [0002] As one of the most important energy sources in the world, oil and gas have limited total reserves. In the process of oil and gas reservoir development, it is the core goal to achieve the best development effect (maximum recovery) within a reasonable and effective time. However, how to reasonably and accurately evaluate the development effect of oil and gas reservoirs has been relatively consistent in terms of methods, but in terms of evaluation scale, the existing division methods are not very ideal in the application of oil and gas reservoir development. [0003] When evaluating the development effect of oil and gas reservoirs, it is mainly carried out on several scales such as single well, flow unit, development layer and oil and gas reservoir. The evaluation of develop...

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Problems solved by technology

The flow unit division method has sufficient geological basis and is currently widely used in various oilfields. However, the division of flow units mainly refers to static geological parameters, and lacks consideration of well pattern deployment, changes in hydrodynamic conditions, and changes in development methods during the development process. Therefore, the development effect evaluation is carried out according to the flow unit. The evaluation results can only find the poorly produced reservoir section, but the distribution of the remaining oil and gas in the section is not clear. The deviation of the result from the real situation

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