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Multi-parameter dimension-reducing oil-gas-water-layer identifying method

An identification method, multi-parameter technology, applied in water resources assessment, climate sustainability, electrical/magnetic detection for logging records, etc. and other problems, to achieve the effect of high plate accuracy and discriminating coincidence rate, improving construction success rate and improving economic benefits

Inactive Publication Date: 2006-03-08
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the exploration direction shifted to the Fuyu and Yangdachengzi oil layers in the west of Changyuan, the coincidence rate of identifying oil, gas and water layers with the original method dropped significantly.
Especially when improving the predicted oil reserves, due to the poor physical properties of the oil reservoirs, most of them are low-porosity and low-permeability reservoirs, with high muddy and calcium content, and the pore structure is relatively complex, so that the resistivity and other curves reflect fluid information Covered by the information reflecting the pore structure and lithology, it is difficult to use the original method to identify the fluid properties in the reservoir from the logging curves in the interpretation process
On the other hand, since the water-producing layers of low-permeability reservoirs have no obvious regional regularity, and oil testing is mostly based on combined test layers, it is difficult to accurately determine the fluid properties of a single layer based on oil testing results. At the same time, the establishment of the water saturation model cannot change with the change of lithology, so that there are large errors in the calculation results. The coincidence rate of the oil-water layer explained by the traditional method is low, especially in the absence of single Under oil testing conditions, it is impossible to formulate oil layer electrical standard charts
Many factors make it difficult for the original method to meet the needs of oil and gas exploration and development and increase reserves

Method used

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Embodiment 1

[0061] ① Investigate and study the geological conditions of the reservoir, collect oil test, test production or oil production data of the reservoir.

[0062] The XZ structure is located in the XZ nose structure in the south of the Qijia-Gulong sag in the central depression area of ​​the Songliao Basin, and the main target layer is the Putaohua oil layer of the first member of the Yaojia Formation of the Lower Cretaceous system. The main body of the top surface of the Putaohua oil layer is a wide and gentle nose-shaped structure dipping from northeast to southwest, and the southwest is the transitional saddle of the XZ nose-shaped structure dipping to the northeast. The overall structural form is high in the east and low in the west, high in the north and low in the south, with two nose-shaped structures and two synclines distributed alternately. Cut by faults, it has the structural characteristics of east-west zoning, and developed some quaternary structures dominated by faul...

Embodiment 2

[0079] ① Investigate and study the geological conditions of the reservoir, and obtain the oil test, test production or oil production data of the reservoir.

[0080] The Bycg reservoir structure is located in the west of the central depression in the northern part of the Songliao Basin, across two secondary structural belts, the Longhupao-Da'an Terrace and the Qijia-Gulong Sag. The main target layer for exploration is the FY oil layer in the upper part of Quan 4 Member and Quan 3 Member of Lower Cretaceous Cretaceous.

[0081] From the structural map of the top surface of the F oil layer, this area is located in the west of the central depression in the northern Songliao Basin. There are two secondary structural belts in the middle part of Kualonghupao-Da'an Terrace and Qijia-Gulong Sag. In general, it is a paleo-monocline that is uplifted westward by the Talaha syncline, with well-developed faults, and three groups of north-north-east fault zones play a leading role. From ea...

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Abstract

A multi parameter dimension reducing oil gas water layer identifying method, which contains 1, investigating oil reservoir geologic condition, collecting the data of test oil and test production of oil reservoir, 2, determining object reservoir layer of well according to electrical logging comprehensive explanation and logging oil gas display result, 3, selecting reservoir parameter of electrical logging and logging, 4, compiling computer program by statistical mathematics-factor analysis method, combining the liquid producing data of object reservoir, making linear combination and dimension reducing to two main factors, 5, using the established oil, gas and water figure board in step 4 to judge oil, gas and water in oil reservoir and other object reservoir.

Description

Technical field: [0001] The invention relates to a method for oil-gas exploration and development well oil-gas-water layer interpretation, in particular to a multi-parameter dimensionality reduction oil-gas-water layer identification method. Background technique: [0002] For a long time, the oil industry has widely used electrical logging and mud logging data to explain oil and gas layers in the exploration and development of oil fields, which has played a vital role in the oil industry. In the long-term scientific research and production practice, according to the characteristics of oil fields from exploration to development in different stages, many methods have been formed, and many oil and gas layers have been explained according to the characteristics of oil and gas layers with high resistivity and high acoustic time difference. confirmed. However, with the continuous deepening of oil and gas exploration, the target geological conditions of exploration and development...

Claims

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Application Information

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IPC IPC(8): G01V3/38G01V3/18
CPCY02A90/30
Inventor 林景晔尹大庆陈萍韦学锐
Owner DAQING OILFIELD CO LTD
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