Complex fault block structure modeling method

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

Active Publication Date: 2021-02-05
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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  • Complex fault block structure modeling method

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Embodiment Construction

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

[0032] Such as 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, establishment of velocity model and 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 velocity model in the study area and time-to-depth conversion; Input of well results. The results entered here include time and depth domains.

[0034] Step S2, fine characterization of faults with complex occurrences and shapes;

[0035] In conventional modeling, the boundary contours of fault pinch-outs are usually described as convex polygons.

[0036] However, the pinch-out boundary contours of faults with complex occurrences and shapes a...

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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 comprises the following steps of: establishing a speed model and performing time-depth conversion; carrying out fault fine depiction on complex occurrence and form; determining an intersection and cutting relation between two adjacent faults; processing the intersection relation between the fault and the stratum of a fault dense area; processing the intersection relation between the reverse fault and the stratum;finely adjusting the position of a well-to-earthquake combined structure; processing the complex fault intersection relation; carrying out overlapping inversion processing; establishing an oil layergroup level construction model; establishing a unit-level construction model; carrying out consistency processing on the upper and lower inheritance relationship; and respectively establishing unit-level construction models according to the oil layer groups, and establishing an overall construction model by taking simulation results as constraint conditions. According to the modeling method provided by the invention, the fault and the accurate position of the structure are controlled by a well, and the structure form and trend are determined by earthquake; and the relationship among the well,fault and structural layer is reasonably coordinated.

Description

technical field [0001] The invention relates to the technical field of exploration and development of fault block oil and gas fields, in particular to a modeling method for complex fault block structures. 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 oilfields entering high and ultra-high water cut periods, the water cut rises rapidly and production declines rapidly, so 3D geological modeling of reservoirs has become an important work for oilfield development. The existing conventional 3D structural modeling uses the corner point grid modeling method, which can only be applied to fault blocks with simple structural features or blocks without faults. This method cannot establish a matching three-dime...

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Application Information

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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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