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陆良盆地是云南省第三系沉积盆地的典型代表。盆地烃源岩有机碳含量高,以腐泥腐殖型为主,成熟度低,以形成生物(细菌)气为主。盆地具有生物气形成的优越条件。盆地储集层以高孔中渗和高孔低渗两类为主,盖层岩石的封闭能力弱,保存条件欠佳。盆地第三系有一个含气系统,即N2c2-N2c3(!)含气系统。上第三系茨营组二段(N2c2)为主力烃源岩,三段(N2c3)为优势储集岩,而N2c4为区域盖层。
Luliang Basin is a typical representative of the Tertiary sedimentary basin in Yunnan Province. The source rocks of the basin are characterized by high organic carbon content, mainly sapropel humus type and low maturity, mainly taking the form of biological (bacterial) gas. The basin has the advantages of biogas formation. The reservoirs in the basin are dominated by high porosity and permeability and high porosity and low permeability. The sealing ability of cap rocks is weak and their preservation conditions are not good. The Tertiary in the basin has a gas-bearing system, N2c2-N2c3 (!) Gas-bearing system. The second member of the Upper Triassic Petroglyph Formation (N2c2) is the main hydrocarbon source rock. The third member (N2c3) is the dominant reservoir rock while the N2c4 is the caprock.