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A Modeling Method for Complex Fault Block Structure

A modeling method and technology of complex fault blocks, applied in seismology, instruments, measuring devices, etc., can solve problems such as the inability to meet the needs of accurate characterization of complex structural fault blocks

Active Publication Date: 2022-07-26
DAQING OILFIELD CO LTD +1
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Problems solved by technology

[0005] The present invention provides a complex fault block structure modeling method to overcome that the three-dimensional structure modeling method in the prior art is only suitable for fault blocks with simple structural characteristics or geological structure forms without fault block development, and cannot satisfy complex structural faults. Pitfalls of accurate characterization requirements

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  • A Modeling Method for Complex Fault Block Structure

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Embodiment Construction

[0031] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] like figure 1 As shown, the embodiment of the present invention provides a complex fault block structure modeling method, which specifically includes the following steps:

[0033] Step S1, the establishment of the velocity model in time-to-depth conversion, including the use of synthetic seismic records, combined with seismic interpretation results and logging layered data, to complete the establishment of the velocity model in the study area. Time-to-depth conversion; Input of well results. The results input here include two domains of time and depth.

[0034] Step S2, fine characterization of faults of complex occurrence and shape;

[0035] In conventional modeling, fault pinch-out boundary contours are mostly described as convex polygons.

[0036] However, the contours of the pinch-out boundaries of complex occurrence and morphological fau...

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Abstract

The invention relates to the technical field of fault block oil and gas field exploration and development, in particular to a complex fault block structure modeling method. The method includes the establishment of velocity model and timely depth conversion; fine characterization of faults in complex occurrence and shape; determining the intersection and truncation relationship between two adjacent faults; Intersection relationship processing between faults and layers; fine adjustment of well-seismic combined structural horizons; processing of complex fault intersection relationships; superimposition and inversion processing; establishment of oil layer group-level structural model; Consistent treatment of inheritance relationship; establishment of unit-level structural models according to oil reservoir groups, and establishment of overall structural models by using the simulation results as constraints. The modeling method provided by the present invention utilizes wells to control the exact positions of faults and structures, utilizes earthquakes to determine the structure form and trend, and reasonably coordinates the relationship among wells, faults and structural layers.

Description

technical field [0001] The invention relates to the technical field of fault block oil and gas field exploration and development, in particular to a complex fault block structure modeling method. Background technique [0002] With the gradual deepening of oil and gas field development, more and more fault-block oil and gas reservoirs with complex structures have become the focus of research, and their complex geological conditions have brought great difficulties to oil and gas field development. At the same time, in the oilfields entering the high and ultra-high water cut period, the water cut rises rapidly and the production declines rapidly. The three-dimensional geological modeling of reservoirs has become an important work in oilfield development. The existing conventional three-dimensional structural modeling adopts the corner point grid modeling method, which can only be applied to fault blocks with simple structural features or blocks without faults. This method cann...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/62
Inventor 傅志明杨柏程顺国
Owner DAQING OILFIELD CO LTD
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