Method for selecting earthquake information in well-seismic combination

Abstract

The invention relates to a method for selecting earthquake information in well-seismic combination. By the method, the problems that earth information selection is complicated in manual operation andlow in forecast accuracy and is not suitable for subsequent exquisite adjustment demand after development during the well-seismic combination process are mainly solved. The method comprises the six steps of 1, analyzing forecast coincidence rate of a well and seismic storage layer according to a dense well pattern anatomic region; 2, analyzing a relation between the forecast coincidence rate and vertical sedimentary cycle; 3, analyzing a relation between the forecast coincidence rate and a quantitative geological condition of the storage layer; 4, determining an application deposition unit ofa well-seismic combination storage layer forecast technology by combining well-seismic combination applicability analysis conclusion, and further analyzing an application part on a plane in each unit;5, performing well and seismic storage layer forecast on the storage layer suitable for the well and seismic storage layer forecast technology; and 6, performing dynamic and static combination measure digging by employing a well and seismic storage layer forecast technology. By the method, the storage layer forecast technological process of the well and seismic combination deposition unit is built, reasonable utilization of earthquake result data is achieved, a single sand body is guided to exquisitely engrave, and an actual effect on development and adjustment measure digging at an ultrahighwater period after experiment application is achieved.

Description

technical field [0001] The invention relates to a method for selecting seismic information in the field of geophysical prospecting. Background technique [0002] Compared with drilling data, seismic data has abundant horizontal information, but its vertical resolution is limited. For sand-mud interbedded reservoirs, there is often a mismatch between seismic reservoir prediction results and drilling interpretation results. How to make good use of this data to solve the problem of interwell reservoir prediction in oilfield development is particularly critical. A common practice is to mark the seismic results and well information on the same planar base map, and identify the choice of seismic results through manual comparison of wells and layers. When the reservoir information at the well point is consistent with the seismic interpretation, the inter-well The range can be predicted by seismic results; if it is different, the actual drilling data shall prevail at the well point...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems mentioned in the background technology, the evaluation method provided by the present invention includes two key technologies, one is the applicability evaluation technology of well seismic reservoir prediction, aiming at the over prediction and low prediction efficiency of the reservoir in the original method question

The second is the hierarchical control micro-phase optimization combination technology, which solves the problem that the original method is not suitable for fine adjustment requirements in the later stage of development

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