鄂尔多斯盆地马家沟组成藏条件及资源潜力评价

Erdos basin Majiagou composition accumulation conditions and resources potential evaluation

鄂尔多斯盆地马家沟组碳酸盐岩烃源岩吸附能力相对较弱,具有良好的排烃能力。马1段,马3段以及马5段具有膏岩,盐岩沉积分布,盆地东部受到马五段厚层状膏盐层的阻隔,导致来自碳酸盐烃源岩的气源在盐下形成自生自储的碳酸盐岩气藏。奥陶系发育了三类碳酸盐岩储层,第一种组合是风化壳溶孔型储层,第二种是中、下组合白云岩晶间孔储层,第三种是盆地南部台缘礁滩相带储层。研究区源储配置良好,易形成大面积气藏,烃源岩和储层是控制油气成藏的关键因素。南缘研究区碳酸盐岩具有良好的资源前景,是今后勘探研究的重点。

The ability of Majiagou formation carbonate source rocks adsorption in Erdos basin is relatively weak, has the good ability of hydrocarbon expulsion. The Ma 1 section, 3section and 5 section of the Majiagou with gypsum rock, salt rock deposition distribution, the eastern part of the basin is the Ma five section of thick bedded salt layer of the barrier, resulting from carbonate hydrocarbon source rock source authigenic carbonate gas reservoir formed in the reservoir under the salt. Development of three kinds of ordovician carbonate reservoir, the first is a combination of a weathering crust solution pore type reservoir, second,is in under the combined dolomite intercrystalline pore reservoir, third is the south basin of platform margin reef bank facies reservoir. The study area source storage configuration is good, easy to form a large area of reservoir, hydrocarbon source rock and reservoir is the key factor of forming reservoirs of oil and gas control. Carbonate rock in southern margin of the study area has a good resource potential, is the focus of future exploration and research.