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A Paleogeomorphological Section Restoration Method

A restoration method and ancient landform technology, applied in the field of oil and gas field exploration, can solve the problems of randomness in division standards, lack of characterization of landform units, lack of constraints and verification of landform maps, and achieve the effect of enhancing characterization accuracy and improving three-dimensionality.

Inactive Publication Date: 2019-02-01
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only leads to the lack of constraints and verification of geomorphic maps, but also the lack of intuitiveness in the description of geomorphic units, and the randomness of division standards

Method used

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  • A Paleogeomorphological Section Restoration Method
  • A Paleogeomorphological Section Restoration Method
  • A Paleogeomorphological Section Restoration Method

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Experimental program
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Embodiment

[0065] Such as figure 2As shown, taking the Shan 330 well area in the east of the Jingbian gas field as the research object, the Jingbian gas field is a typical paleokarst gas field. The gas field was uplifted as a whole in the late Caledonian movement, exposing the lower paleo-Karst on the surface after the Early Paleozoic and Middle Ordovician regression. The carbonate rocks in the Zodiac have suffered weathering and denudation, rain erosion, chemical dissolution and leaching for 130 Ma, forming the weathering crust reservoir at the top of the fifth member of the Majiagou Formation.

[0066] 1) Establish stratigraphic sequence framework

[0067] Using conventional stratigraphic division and comparison method to divide weathered crust stratigraphic units, and establish isochronous stratigraphic sequence framework;

[0068] 2) Preparation of paleogeomorphological profile recovery data

[0069] Acquisition of overlying strata thickness data: According to the drilling stratif...

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Abstract

The invention relates to a palaeo-geomorphic cross section recovery method. The palaeo-geomorphic cross section recovery method is characterized by including the steps of 1, building a stratum sequence framework, wherein a target stratum of a target paleo-karst oil-gas field is subjected to stratum unit division to build the isochronous stratum sequence framework; 2, obtaining palaeo-geomorphic cross-section recovery data, wherein thickness data of an overlying stratum is obtained, stratigraphic deposition thickness data is obtained, and residual thickness data is obtained; 3, recovering a palaeo-geomorphic cross section map, wherein cross section lines and well position points are obtained, a paleostructure background line of karst is obtained, a stratigraphic deposition thickness line is obtained, a stratum residual thickness line is obtained, palaeo-geomorphic cross section recovery is completed according to the steps, the palaeo-geomorphic cross section map is generated, and all map elements are indicated. According to the palaeo-geomorphic cross section recovery method, as the palaeo-geomorphic cross section map is recovered, the tridimensional characteristic, the binding characteristic, the quantitative characteristic and the visual characteristic of palaeo-geomorphic researching are improved, and the depiction accuracy of geomorphic units is increased.

Description

technical field [0001] The invention relates to a method for restoring paleogeomorphological profiles, which belongs to the field of oil and gas field exploration. Background technique [0002] Paleokarst oil and gas fields are an important type of oil and gas fields, widely distributed in my country, such as: Renqiu Oilfield in Bohai Bay Basin, Tahe Oilfield in Tarim Basin, Lunnan Oilfield and Jingbian Gasfield in Ordos Basin, etc. The formation of such oil and gas fields is closely related to crustal uplift and long-term weathering and denudation, rain erosion, chemical dissolution and leaching, and their distribution is strictly controlled by the development of karst paleogeomorphology. Finely describing paleogeomorphic units and their distribution rules is of great practical significance for mastering the spatial symbiosis relationship of karst reservoirs and the law of oil and gas enrichment. [0003] At present, there are many research reports on paleogeomorphology, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 代金友王静
Owner CHINA UNIV OF PETROLEUM (BEIJING)