马朗凹陷条湖组二段非常规致密储层特征研究

The Irregular Compact and Condensed Reservoir Characteristics of the Second Member of Tiaohu Formation in Malang Depression

利用录井、测井、铸体薄片、压汞和岩心常规分析等资料，对马朗凹陷条二段储层开展岩石学、储集空间类型、物性、孔隙结构和沉积环境等方面的研究，结果表明：研究区岩性以沉凝灰岩为主，火山尘微孔为主要储集空间，属高孔一特低渗储层，孔隙结构呈分选好、细歪度的特点。储层发育主要受沉积环境影响，火山喷发后的火山沉积相分布区及古地貌低洼区共同控制有利区范围。

The compact and condensed reservoir which is gripped between the perfect source rock （compact and con-densed clastic rock ） and carbonate rock,has accumulated hydrocarbon not experienced long distance migration in great force.The reservoir has not natural productivity,except usage of fracturing techniques in great force to get industrial pro-ductivity. Recently,an irregular compact and condensed reservoir is developed in the abdomen of Malang Depression. The lithology,reservoir space,physical properties,pore structure and sedimentary environment of the reservoir is stud-ied systematically by using geological logging,well logging,casting thin sections,mercury injection data and analysis of core.The main lithology is sedimentary tuff having high porosity and super-low permeability.The pore structure has good separation and fine skewness.The reservoir main space is volcanic dust microporous.The sedimentary environment ef-fects importantly for developing of reservoir.The deposited range of volcanic deposition facies and the low-lying district of ancient landform have controlled the distribution of favor region.