Study on logging recognition for oil and gas of coal seam surrounding rock in Huangling mining area
The coexistence of oil and gas in coal bearing strata has an effect on the coal mining safety when there are abnormal emission of oil and gas in the process of roadway excavation and mining in Huangling mining area . The lithology and electrical characteristics of reservoir for Yan'an and Yanchang strata in coal seam surrounding rock were analyzed by using the data of well logging .Through the comparative study with the adjacent water layer , the increasing rate of resistivity in oil and gas abnormal strata of surrounding rock was estimated to be less than 2, and the contrast of reservoir fluid judgment was low .An appropriate well logging interpretation model was selected , and the obtained porosity and permeability were lower through the calculation .The hydrocarbon saturation was lower than 30%, with an interpretation of oil bearing aquifer .In summary , the hydrocarbon reservoir in coal seam sur-rounding rock of mining area belongs to the low resistivity hydrocarbon reservoir with lower hydrocarbon abundance . On this basis , the prediction of hydrocarbon distribution can be made using geological methods before the roadway excavation or mining , therefore it can guide the mine gas drainage operation .
coal mining areacoexistence of oil and gaswell logging interpretationoil-gas possibilitygas pre-vention and control
NETL
NSTL
万方数据
