Fault karst body reservoir quantitative characterization method

Abstract

The invention provides a fault karst body reservoir quantitative characterization method. The method comprises steps: the development mode of the fault karst body is built; with the development mode of the fault karst body as a guide, earthquake prediction on fault karst body characteristics is carried out; with a karst development mode as a guide, a fault karst body reservoir three-dimensional geological model is built; and based on production dynamic data, the fault karst body reservoir three-dimensional geological model is corrected. According to the fault karst body reservoir quantitativecharacterization method disclosed in the invention, the fault karst body reservoir development mode is thoroughly considered, based on geophysically-predicted fault karst body correlation attributes,a well-to-seismic integration geological modeling method is adopted, the distribution of a fault karst body outer contour, inner characteristics and attribute parameters is built respectively, the fault karst body reservoir characteristics are quantitatively characterized, and reliable basis is provided for reserves evaluation, numerical simulation and development program adjustment.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a quantitative characterization method for fault-karst body type oil reservoirs. Background technique [0002] Fault-karst reservoirs mainly refer to brittle limestone fracture zones developed along faults formed by tectonic action, and karst water infiltrates or upwells along the fault direction, resulting in the dissolution of fracture zones in and around the fracture zone to form fracture-cavity systems with different spatial structures . Faulted-karst reservoirs are a kind of fractured-vuggy carbonate reservoirs, which refer to favorable zones for the development of karst fractured-cave bodies controlled by deep and large faults, with obvious fault-controlled karst features. The development of fault-karst reservoirs in the mine has achieved initial success. Many oil wells with a yield of more than 100 tons have been drilled, and the problem of further d...

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Problems solved by technology

[0004] The above studies have described and described the fault-karst reservoirs through multidisciplinary data. Seismic methods were used in the prediction of fault-karst bodies, and the characterization of the reservoirs was qualitative description. It is difficult to provide accurate geological basis for the design and optimization of reservoir development programs without quantitatively characterizing fault-karst reservoirs.

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