Observation system intelligent variable observation method combining earth surface and underground double factors

Abstract

The invention relates to the technical field of oil and gas field exploration and development, in particular to an intelligent observation system variable observation method combining earth surface and underground double factors. The method comprises the following steps: establishing a shallow, middle and deep three-dimensional high-precision speed and geologic model, and designing a regular observation system; establishing a real earth surface three-dimensional structure model, and automatically identifying and delineating obstacles; automatically selecting shot points and detection points which need to be changed in view, and moving the selected shot points and detection points by utilizing an automatic view changing algorithm; calculating an observation system attribute graph, and quantitatively evaluating the observation system after automatic observation changing; and adjusting a variable observation position according to a quantitative evaluation result, encrypting the shot points or the detection points, and outputting a final observation system SPS file. According to the method, the variable observation influence of the observation system is considered from two factors of the earth surface and the underground, the requirements of accurate imaging and reservoir prediction of the underground target layer are ensured while the influence of earth surface obstacles and near-earth surface special geologic bodies is effectively avoided, and the observation system after intelligent variable observation can ensure that high-quality original data can be acquired.

Description

technical field [0001] The invention relates to the technical field of exploration and development of oil and gas fields, in particular to an intelligent variable observation method for an observation system combining surface and underground factors. Background technique [0002] With the deepening of exploration and development of complex structural oil and gas reservoirs, thin-bed lithologic oil and gas reservoirs, and shale oil and gas resources, in the field acquisition of seismic data, it is necessary to design an all-round, high-density observation system with wide azimuth and broadband Belt, high density, high coverage times, single-point reception, small gun spacing, and trail spacing. Designing a "two wide and one high" or high-density all-round field observation system plays an important role in improving the imaging effect of seismic data and improving the accuracy of reservoir description. However, due to the adverse effects of complex surface obstacles, the actu...

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Problems solved by technology

[0003] The conventional method usually uses a two-dimensional satellite picture plan to manually pick up and calibrate the obstacle position, and then move the shot point and receiver point in the obstacle, which has low construction efficiency, no basis for changing the view, and no consideration of the underground target layer. The problem of lack of monitoring means

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