Classified reservoir evaluation method for undeveloped-reserve block

Abstract

The invention provides a classified reservoir evaluation method for an undeveloped-reserve block. The classified reservoir evaluation method comprises the following steps of: selecting an evaluation object, and performing evaluation classification on each specific block one by one; developing specific reservoir evaluation work for a I-type evaluable production-establishing block, compiling a production-establishing plan and a development program, and conditionally reporting reserve volume; analyzing a main controlling factor which affects block valid production for a II-type deep tackling evaluation block, defining a technical strategy and a tackling direction for the specific block, compiling a development conceptual plan, designing a reservoir evaluation well and performing deep potential evaluation; performing effective use influence factor analysis for a III-type development delayed evaluation block, and defining specific reasons that the III-type development delayed evaluation block cannot be effectively developed. The method provides a feasible thought and method for classified reservoir evaluation of exploration on new discovery, reserve control and proving on undeveloped reserve, and the like on different-level new-district undeveloped-reserve blocks, provides technical support for oil-field reservoir evaluation work, and quickens effective use and reserve promotion for reserves at different levels.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for evaluating oil reservoirs by classifying blocks of unproduced reserves. Background technique [0002] Shengli Oilfield has a large scale of unproduced reserves of different grades such as new exploration discoveries, probable reserves and proven undeveloped reserves. There are many production resources available for evaluation, but the types of reservoirs are complex, and mainly low-grade hard-to-recover reserves are economically and effectively produced. High difficulty. At the same time, there have been many rounds of screening and evaluation, especially the controlled reserves and proven undeveloped reserves, most of which are the "hard bones" left over from years of screening, making further evaluation and production difficult. In Shengli Oilfield, there are many unproduced reserve blocks of different grades such as newly discovered exploration rese...

AI Technical Summary

Problems solved by technology

The existing SY / T5521-2008 "Technical Specifications for Reservoir Evaluation" is an industry standard released by China National Petroleum Corporation on June 16, 2008 after revision on the basis of SY / T5521-1996 "Technical Specifications for Reservoir Evaluation" , although it clarifies the contents and procedures of reservoir evaluation, it mainly introduces a certain block in general, and does not subdivide the reserve category in detail. In the process of reservoir evaluation of specific blocks with different types of undeveloped reserves, There are few places for reference and reference

At the same time, the goal of SY / T5521-2008 "Technical Specifications for Reservoir Evaluation" is mainly to submit the proven reserves, and there is no mention of the evaluation position and effective development of other grades of reservoirs such as controlled reserves, and the evaluation focuses on the degree of reserve implementation. Economically effective development of reserves is seldom involved

With the gradual deepening of oilfield exploration and development and the continuous development of technology, the resource situation has undergone major changes, and the original technical specifications and evaluation methods for reservoir evaluation are no longer fully applicable

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