Inversion method of microscale deposition stage palaeogeomorphology in weak construction deformation range

A deformation zone and small-scale technology, applied in the field of geological and mineral exploration, can solve problems that affect sedimentation and reservoir research work, stay, and cannot fully reflect paleogeomorphology

Active Publication Date: 2016-03-23
CHINA UNIV OF PETROLEUM (BEIJING) +1
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Problems solved by technology

[0012] At the same time, the restoration of paleogeomorphology during the sedimentary period is still based on the traditional analysis of sedimentary facies, and the outline of paleog

Method used

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  • Inversion method of microscale deposition stage palaeogeomorphology in weak construction deformation range
  • Inversion method of microscale deposition stage palaeogeomorphology in weak construction deformation range
  • Inversion method of microscale deposition stage palaeogeomorphology in weak construction deformation range

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Embodiment 1

[0048] The Ordos Basin is divided into six first-level structural units, including the western margin thrust belt, Tianhuan depression, Yimeng uplift, Yishan slope, western Shanxi perturbation belt and Weibei uplift. The western marginal thrust belt and the western Shanxi disturbance zone are structural units with strong structural deformation. The Yishan Slope and the southern margin of the Yimeng Uplift are areas with very weak structural deformation. The advanced structures are generally characterized by a structural pattern of northeast high, south west and low. The sedimentary period of marine carbonate rocks on the Yishan Slope showed a tectonic framework of high northwest and low south east ( image 3 ).

[0049] The eastern area of ​​the Sulige Gas Field is located on the northeast side of the Yishan Slope in the Ordos Basin structurally, and on the south side of the Yimeng Uplift. Geographically located in the east and north of Wushen Banner. The average well spacing in...

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Abstract

The invention provides an inversion method of microscale deposition stage palaeogeomorphology in a weak construction deformation range, and the method comprises the steps of 1 determining a current construction of a work area, namely determining a trend surface of the current construction; setting the distance between the current construction surface in vertical direction and a trend amplitude wire as a proposed construction amplitude; subtracting trend surface landform data from the current construction landform data to get proposed construction amplitude data; 2 determining a deposition stage construction trend surface; and 3 adding the deposition stage construction trend surface and the proposed construction amplitude data obtained from step 1 to get a deposition stage palaeogeomorphology. <{EN2}>According to the method, the distribution heterogeneity of high-quality reservoirs can be known when exploiting gas fields that has an area of only hundreds of square kilometers and a well spacing of 1000 meters or less; and the success rate for well encryption can be raised.

Description

Technical field [0001] The invention belongs to the field of geological and mineral exploration, and specifically relates to a geomorphological data inversion method. Background technique [0002] The significance of paleogeomorphology to reservoirs, especially carbonate reservoirs, can be discussed from two perspectives: paleogeomorphology during deposition and denudation. 1. Paleo-geomorphology in the sedimentary period is a key factor controlling the development of sedimentary systems. The paleo-geomorphology of marine sediments has an important control effect on carbonate reservoirs such as reefs and tidal flats. It is generally believed that the reefs are developed on the faulty uplift platform and its platform edge slope, and the favorable tidal shoal reservoirs are developed in the hydrodynamic high-energy area on the top of the underwater low uplift. Second, denudation of ancient landforms (karst highlands, karst shaking slopes, karst valleys) has an important control ef...

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Application Information

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IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 王建国顾岱鸿马俊宝纪彦博
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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