METHOD FOR PLACEMENT OF PROSPECTING, EXPLORATION AND PRODUCTION WELLS ON OIL AND GAS FIELDS BASED ON MULTI-VARIANT THREE-DIMENSIONAL GEOLOGICAL MODELS Russian patent published in 2016 - IPC G01V1/30 

Abstract RU 2578733 C2

FIELD: geology; oil industry.

SUBSTANCE: invention relates to oil geology and can be used for optimisation of arrangement of exploration and production wells on investigated object. Essence: seismic surveys are conducted. Wells are drilled with extracting cores from target formations. Geophysical survey and testing of wells is carried out. Prediction seismic maps are constructed on survey area. Obtained based on borehole and seismic investigations map of effective thickness, as well as map of minimum and maximum effective thicknesses and dispersions of effective thicknesses of formations are transformed to numerical format. Based on obtained map of effective thicknesses lithological trend three-dimensional model of formation or deposit is constructed. Based on lithologic trend three-dimensional model of formation or deposit, generating multiple lithological cubes with different ranks of semivariograms. Constructing a nomogram indicating dependence of error models from ranks of semivariograms. Selecting set of most reliable cube models of lithology and based thereon, constructing cubes porosity and oil and gas saturation of rock. Considering obtained said geological models, estimation is carried out of resource base of deposit and places of possible location of new designed wells are determined. Then, based on of all available data in model with best geological and ecological and economic point of view properly place new wells.

EFFECT: technical result is improved accuracy of justification of new wells, reduced load on environment.

1 cl, 1 dwg

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RU 2 578 733 C2

Authors

Putilov Ivan Sergeevich

Potekhin Denis Vladimirovich

Dates

2016-03-27Published

2013-12-24Filed