Method for evaluating favorable reservoir formation zone of ancient buried hill

An evaluation method and technology for favorable areas, applied in data processing applications, instruments, calculations, etc., can solve the problems of poor effectiveness of ancient buried hill accumulation evaluation methods, and achieve the effect of reliable evaluation and improved accuracy.

Active Publication Date: 2019-11-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for evaluating favorable zones of ancient buried hill

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  • Method for evaluating favorable reservoir formation zone of ancient buried hill
  • Method for evaluating favorable reservoir formation zone of ancient buried hill
  • Method for evaluating favorable reservoir formation zone of ancient buried hill

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Embodiment

[0043] The Dongpu Sag is a Cenozoic high-frequency oscillating salty faulted lake basin developed on the basement of the Mesozoic and Paleozoic. During the formation of the Sag, a huge clastic rock formation dominated by the Paleogene was deposited. The Jurassic and Cretaceous strata are basically absent in the basin, and the Paleogene directly covers the Middle and Lower Triassic and older strata, while the Lower Paleozoic, Upper Paleozoic, Middle and Lower Triassic, etc. The reflected sedimentary features are similar to other areas in North China. A series of NNE-trending normal faults developed in the Dongpu Sag in the Paleogene, which can be divided into the Lanliao fault zone, the Yellow River-Wenxi-Guancheng fault zone and the Changyuan-Shijiaji-Songmiao fault zone on the whole, forming three ancient fault zones. The buried hill structural belt, due to the continuous activity of faults, controlled the sedimentation of the Shahejie Formation and deposited a thick oil sour...

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Abstract

The invention relates to a method for evaluating a favorable reservoir formation zone of an ancient buried hill. The evaluation method comprises the following steps: determining a zone where high-quality source rock develops in a basin and a stratum position where the high-quality source rock is located; determining the main hydrocarbon expulsion threshold depth of the high-quality source rock; determining the current ancient buried hill structure characteristics of the basin according to the seismic profile structure interpretation result; constructing evolution profiles of the basin in different periods to research the evolution history of the ancient buried hill, determining the thickness of the layer, in lateral contact with the ancient buried hill, of the high-quality source rock contained in the depth range of the main hydrocarbon expulsion threshold, determining the lateral contact time of the high-quality source rock in different layers and the ancient buried hill, and establishing the reservoir forming probability of the ancient buried hill and favorable zone optimization. According to the evaluation method, the reservoir forming probability of the ancient buried hill is evaluated by researching the effective contact area and time period of the ancient buried hill and high-quality source rock according to the development characteristics of the ancient buried hill in different structural evolution periods in combination with the main hydrocarbon expulsion threshold depth of the high-quality source rock, so that optimal evaluation of the basin ancient buried hill iscarried out.

Description

technical field [0001] The invention belongs to the technical field of evaluation research on ancient buried hill accumulation, and in particular relates to an evaluation method for favorable zones of ancient buried hill accumulation. Background technique [0002] The ancient buried hill refers to the bedrock block with positive structure in the basement buried under the Cenozoic caprock, which experienced two stages of crustal uplift and denudation and crustal descent and burial. At present, the research on ancient buried hills is to comprehensively use multi-disciplinary data such as core, mud logging, well logging and seismic data to compare and calibrate single well conventional logging and imaging data, to identify the lithology of ancient buried hills, and to According to the characteristics of layer imaging logging response, the reservoir is divided into residual accumulation zone, weathering crust, fracture-vuggy fracture zone, internal oblique high-angle fracture zo...

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Application Information

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IPC IPC(8): G06Q50/02G06Q10/06
CPCG06Q50/02G06Q10/0639
Inventor 余海波徐田武谈玉明康玮张云献鹿坤周勇水张建军
Owner CHINA PETROLEUM & CHEM CORP
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