Method for quickly and comprehensively evaluating economic effective producing feasibility of untouched reserves

Abstract

The present invention provides a method for quickly and comprehensively evaluating the economical and effective production feasibility of undeveloped reserves, including: selecting the evaluation object, and surveying the ground conditions of the block; clarifying the technical adaptability of the block; checking the trial mining data of the block , respectively screen out blocks with test production data and blocks without test production data; evaluate the implementation degree of test production capacity; establish economic limit parameter charts for different reservoir types, different oil prices, and different well depths, and determine the current estimated oil price. Economic limit initial production and economic limit cumulative production of oil wells in the target layer of the block; evaluate the economic benefits of test production wells, and judge the degree of reserves of the block. The rapid and comprehensive evaluation method for the economical and effective production feasibility of undeveloped reserves can quickly evaluate the economical and effective production feasibility of controlled reserves and proven undeveloped reserves, timely screen high-quality production construction positions, provide technical support for oilfield reservoir evaluation, and accelerate Effective utilization of different grades of reserves and upgrade of reserves.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for quickly and comprehensively evaluating the feasibility of economically and effectively producing undeveloped reserves. Background technique [0002] Shengli Oilfield has a large scale of controlled reserves and proven undeveloped reserves, and there are many resources available for evaluation. However, the types of reservoirs are complex, mainly low-permeability and heavy oil; low-permeability reservoirs are buried deep and have poor physical properties; heavy oil reservoirs are characterized by "water, sensitive, deep, thick and thin", and the reserve grade is relatively poor. At the same time, the reporting time span is long, and there have been many rounds of screening and evaluation, most of which are difficult-to-recover reserves remaining after years of screening, making further evaluation and production difficult. Shengli Oilfield has many block...

AI Technical Summary

Problems solved by technology

The existing SY / T5521-1996 "Technical Specifications for Reservoir Evaluation" was released by China National Petroleum Corporation on November 15, 1996 after the revision of SY / T5521-92 "Technical Specifications for Reservoir Evaluation". The content and procedures of reservoir evaluation, but the main goal is 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, which is very important for the economic and effective development of reserves. less involved

At the same time, although the existing evaluation methods for proven undeveloped reserves, such as internal rate of return queuing method, movable oil price queuing method, and well control degree method, have also carried out corresponding classification and grading of proven undeveloped reserves, these three methods They all have a common feature and deficiency, that is, many evaluation parameters are required, the evaluation workload is large, the evaluation period is long, and the geological conditions of the reservoir are less considered, and there is a lack of indicators reflecting the reserve grade, and the evaluation results have large gaps. Uncertainty, not suitable for the evaluation of proven undeveloped reserves under the new situation

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 are no longer fully applicable

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