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中国页岩气储层类型多、有机质成熟度相差大,选择适宜的有机质成熟度测试方法,对页岩气储层评价具有重要意义。通过调查中国页岩气储层类型、有机质类型与成熟度特征,分析成熟度测试指标适用性,研究不同储层与测试方法的优化匹配性。结果表明:中国发育海相、海陆过渡相—陆相煤系及湖相(陆相)页岩气储层,Ⅰ型、Ⅱ型和Ⅲ型等有机质类型,具有低成熟、中等成熟度、高成熟度及过成熟等特征。成熟度评价应选择能够指示页岩气储层内部结构与本质信息的指标进行测定。南方地区缺乏镜质组且成熟度较高的陡山沱组、筇竹寺组、龙马溪组等海相页岩气储层,首选激光拉曼光谱参数测试成熟度,并采用沥青质体反射率的测试与换算进行辅助测试;龙潭组、须家河组海陆过渡相—陆相煤系储层及自流井组湖相储层首选镜质组反射率方法。北部地区下古生界海相储层首选沥青质反射率;上古生界海陆过渡相储层首选镜质组反射率指标;高成熟度煤系储层还可结合激光拉曼光谱辅助测试;中生界—新生界湖相储层首选镜质组反射率指标。西部地区海陆过渡相及湖相储层首选镜质组反射率方法;下古生界海相储层首选镜状体反射率测试,中生界海相储层首选镜质组反射率测试。
In China, there are many types of shale gas reservoirs and large differences in organic matter maturity. Choosing an appropriate organic matter maturity test method is of great significance to the evaluation of shale gas reservoirs. By investigating the shale gas reservoir type, organic matter type and maturity characteristics in China, the applicability of the maturity test index is analyzed, and the optimal matching between different reservoirs and test methods is studied. The results show that the marine facies, the transitional facies of continental-continental facies, the shale gas facies of lacustrine facies (continental facies), type I, type II and type III are developed in China, with low maturity, medium maturity and high maturity And over mature features. Maturity evaluation should be selected to indicate the internal structure of shale gas reservoir and the nature of the indicators were measured. In the south, there is a lack of vitrinite and mature maturity in marine shale gas reservoirs such as Doushantuo Formation, Qiongzhusi Formation and Longmaxi Formation. The laser Raman spectroscopy parameters are the first choice for maturity testing. Asphaltene reflectance Rate of testing and conversion test; Longtan group, Xujiahe group of sea-land transition phase - continental coal-bearing reservoir and artesian well lacustrine reservoirs preferred vitrinite reflectance method. Lower Paleozoic marine reservoirs in the northern region preferred asphaltene reflectivity; Upper Paleozoic transition zone facies preferred vitrinite reflectance index; high-maturity coal reservoir can also be combined with laser Raman spectroscopy assisted testing; THE SELECTION OF THE RETICULATE LITERATURE REFRESH INDICATORS IN THE SZOIC BOUNDARY OF THE NEWZOZOIC LAKE. The sea-land transitional facies in the western region and the preferred vitrinite reflectance method in the lacustrine reservoirs; the preferred specular reflectance test in the Lower Palaeozoic marine reservoirs; and the vitrinite reflectance test in the Mesozoic marine reservoirs.