Method and system for recovering sedimentary ancient landform of karst denudation interface, and equipment

A kind of ancient landform restoration and ancient landform technology, applied in seismology, geophysical measurement, seismic signal processing and other directions, can solve problems such as unfavorable karst oil and gas reservoir exploration and development, prediction deviation, etc., to guide exploration and development, eliminate Effects of depositional phase transitions

Pending Publication Date: 2021-11-12
PETRO CHINA CO LTD SOUTHWEST OIL & GAS FIELD EXPLORATION & DEV RES INST +1
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Problems solved by technology

However, in many carbonate gas reservoirs, sedimentary facies also play an important role in controlling the reservoir. Paleogeomorphology is the result of comprehensive effects such as original deposition and later transformation. Traditional paleogeomorphology research ignores sedimentary information and only uses Karst paleogeomorphology is likely to get one-sided results, and there will be deviations in prediction, which is not conducive to guiding the exploration and development of karst oil and gas reservoirs. further improvement

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  • Method and system for recovering sedimentary ancient landform of karst denudation interface, and equipment
  • Method and system for recovering sedimentary ancient landform of karst denudation interface, and equipment
  • Method and system for recovering sedimentary ancient landform of karst denudation interface, and equipment

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Embodiment Construction

[0042] The following is attached Figure 1-3 The application is described in further detail.

[0043] The embodiment of this application discloses a method for restoring sedimentary paleogeomorphology at the karst denudation interface, referring to figure 1 , the method includes the following steps:

[0044] S11: Obtain the paleogeomorphology restoration data of the target karst area, the paleogeomorphology restoration data includes impression stratum thickness and residual stratum thickness.

[0045] S12: Obtain the relative original stratum thickness according to the impression stratum thickness and residual stratum thickness.

[0046] S13: Determine whether the residual stratum is affected by sedimentation, and if so, correct the relative original stratum thickness to obtain the sedimentary paleogeomorphology value.

[0047] S14: Restore the plane of sedimentary paleogeomorphology according to the value of sedimentary paleogeomorphology.

[0048] According to the impres...

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Abstract

The invention relates to a method and a system for recovering a sedimentary ancient landform of a karst denudation interface, and equipment. The method comprises the steps of: acquiring ancient landform recovery data of a target karst region, wherein the ancient landform recovery data comprises the impression stratum thickness and the residual stratum thickness; acquiring the relative original stratum thickness according to the impression stratum thickness and the residual stratum thickness; judging whether a residual stratum is influenced by deposition or not, and if so, correcting the relative original stratum thickness to obtain a sedimentary ancient landform value; and recovering a sedimentary ancient landform plane according to the sedimentary ancient landform value. By adopting the method and the system, the deposition information shown in the ancient landform can be extracted, so that a more comprehensive ancient landform recovery result can be conveniently obtained, and exploration and development work of karst type oil and gas reservoirs can be better guided.

Description

technical field [0001] The present application relates to the technical field of paleogeomorphology restoration, in particular to a method, system and equipment for restoring sedimentary paleogeomorphology at karst denudation interfaces. Background technique [0002] Karst weathered crust reservoirs are one of the important reservoir types in carbonate oil and gas reservoirs. A large number of karst weathered crust reservoirs have been found in the Tarim Basin, Ordos Basin, and Sichuan Basin. Jingbian, Weiyuan, Anyue and other large oil and gas fields. In karst weathered crust reservoirs, paleogeomorphology is often an important reservoir controlling factor, which is closely related to the distribution of reservoirs. A full understanding of paleogeomorphology is of great significance for oil and gas exploration and development. [0003] At present, the impression method is mainly used in the study of paleogeomorphology of this type of reservoir, which focuses on the charact...

Claims

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/28G01V1/301G01V1/306
Inventor 罗文军朱正平刘曦翔徐伟张连进刘义成刘耘
Owner PETRO CHINA CO LTD SOUTHWEST OIL & GAS FIELD EXPLORATION & DEV RES INST
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