Activity calculating method suitable for fault of lost upthrown-side stratum

A calculation method and active technology, applied in calculation, design optimization/simulation, special data processing application, etc., can solve the problems of distance difference of fault displacement, failure to reflect geological time, and failure to well represent fault activity characteristics, etc.
CN107742016AInactive Publication Date: 2018-02-27CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2018-02-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an activity calculating method suitable for a fault of a lost upthrown-side stratum. The method comprises the steps that the evolutionary process of the fault is recovered through a balanced section method; the target stratum is recovered to a state of the end of the depositional stage by using a back-stripping method; the thickness difference of target strata of two sidesof the fault after reconstruction is regarded as the paleo fall D; the fault dip angle and deposition time are determined; the slipping rate of the fault is obtained through calculation by using a formula to represent the activity of the fault. The quantitative evaluation method is simple and convenient to use, based on construction restoring, the influence of stratum loss is evaded, and meanwhile, three factors including the paleo fall, the fault tip angle and the deposition time are taken into consideration, so that the activity characteristics of the fault are more comprehensively reflected.
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Description

technical field

[0001] The invention relates to the technical field of oilfield exploration and development, in particular to an activity calculation method suitable for missing faults in upwelling wall formations. Background technique

[0002] At present, the commonly used methods of fault activity include growth index method, fault drop method and fault activity rate method. These methods are mainly aimed at the well-developed growth faults inside the basin. For high-level faults such as boundary faults at the edge of the basin, because the upwelling strata are often denuded, the current evaluation methods have certain limitations. The growth index method uses the ratio of the upper and lower walls to the thickness of the strata to represent the activity of the fault, but the growth index cannot be used to evaluate the faults that have been eroded or not deposited in the upper and lower walls. Fault drop can effectively avoid the defect of growth index, but it does not re...

Claims

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