Integrated according to the field geological section,thin section identification,X-ray diffraction,field emission scanning electron microscopy (SEM),reservoir property,pore structure,organic carbon (TOC),chloroform bitumen " A",hydrocarbon generation potential (S1 + S2) and rock mechanics analysis,the upper region siltstones taean village Duan Youli reservoir was determined for shell limestone and shale for thin layered combination.A freshman in Sanya for relatively high quality reservoir,brittleness mineral content is significantly higher than freshmen and big sanya,tend to produce more natural fracture and reservoir by fracturing in the late.organic carbon (TOC) average was 1.8％,the hydrocarbon generation potential (S1 + S2) for 1.1％,has the high potential of oil and gas.Through the rock thin section and the analysis of the casting thin sections no village paragraph was found to dense oil reservoir pore-fracture type reservoir.Using high pressure mercury injection data,reservoir physical property data and other technical analysis Dan'anzhai section of reservoir physical characteristics,the results show that the top walled section of the reservoir is a typical low porosity and low permeability reservoir.scanning electron microscopy (SEM) analysis has been clear about the reservoir micro-nanoscale pore development and distribution rules.Clay minerals content between the particles of intergranular hole in upper segment most freshmen sanya,organic matter associated with organic matter development between holes and hole in freshman sanya upper connectivity is better.Comprehensive analysis and judgment freshman Sanya for upper region siltstones Dan'an upper village section of reservoir exploration and development potential was presented.%综合根据野外地质剖面、薄片鉴定、X-衍射、场发射扫描电镜、储层物性、孔隙结构、脆性指数、有机碳含量(TOC)、生烃潜力(S1+S2)和岩石力学分析,确定了川中地区大安寨段有利储层为介壳灰岩和泥页岩为薄互层状岩石组合,大一三亚段为相对优质的储集体.其脆性矿物含量明显高于大一和大三亚段,有利于产生天然裂缝和储层后期的压裂改造.有机碳含量(TOC)平均值为1.2％,生烃潜力(S1+S2)为1.1 mg/g,具有较高的生油气潜力.通过岩石薄片和铸体薄片分析发现大安寨段致密油储层为孔隙-裂缝型储层.运用高压压汞资料、储层物性资料等多种技术分析大安寨段储层物性特征,结果表明大安寨段储层有低孔、低渗的特征.扫描电镜分析结果明确了储层微米-纳米级孔隙发育和分布规律.黏土矿物颗粒之间的粒间孔在大一三亚段上部最为发育,与有机质发育相关的有机质孔和晶间孔在大一三亚段上部连通性比较好.综合分析判断大一三亚段上部为川中地区大安寨段储层勘探开发潜力区.
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