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1、石油勘探与开发5742013年10月PETROLEUMEXPLORATIONANDDEVELOPMENTVol.40No.5文章编号:1000-0747(2013)05-0574-06DOI:10.11698/PED.2013.05.09中国南方海相页岩气高效开发的科学问题1,2,31,221,2,32王红岩,刘玉章,董大忠,赵群,杜东(1.国家能源页岩气研发(实验)中心;2.中国石油勘探开发研究院;3.中国石油非常规油气重点实验室)基金项目:国家重点基础研究发展计划(973)项目“中国南方海相页岩气高效开发的基础研究”(2013CB2280
2、00);国家“十二五”重大专项“页岩气勘探开发关键技术”项目(2011ZX05018)摘要:中国页岩气资源丰富,已在多个地区获初步发现,其中中国南方古生界寒武系、奥陶系和志留系中发育多套海相富有机质页岩,技术可采资源量占全国的3/4,将是重点开发地区。与北美相比,中国南方海相页岩气储集层具有构造改造强、地应力复杂、埋藏较深、地表条件特殊等特点,照搬国外现有理论与技术难以有效开发。页岩气储集层纳米级孔隙对页岩气产能的影响尚不明确,页岩气产能预测方法尚未建立,钻井过程中水平段垮塌严重、钻井周期长,增产改造效果不理想、单井产量较低,需要针对纳米级孔
3、隙成因及多尺度储集空间定量表征、复杂介质多场耦合非线性流动机理、页岩失稳与缝网形成的力学机制3个科学问题进行研究。表1参27关键词:海相页岩气;高效开发;科学问题;中国南方;纳米级孔隙中图分类号:TE37文献标识码:AScientificissuesoneffectivedevelopmentofmarineshalegasinsouthernChina1,2,31,221,2,32WangHongyan,LiuYuzhang,DongDazhong,ZhaoQun,DuDong(1.NationalEnergyShaleGasResearc
4、handDevelopmentCenter,Langfang065007,China;2.PetroChinaResearchInstituteofPetroleumExploration&Development,Beijing100083,China;3.CNPCUnconventionalOilandGasLaboratory,Langfang065007,China)Abstract:ShalegasresourcesareabundantinChinaandhavebeendiscoveredinsomeareas.Theyarewi
5、delydistributedintheCambrian,OrdovicianandSilurianstratainSouthernChina,withtechnicallyrecoverableresourcesaccountingfor3/4ofthewholecountry.TheSouthernChinawillbethemainareaforshalegasdevelopment.ComparedwithNorthAmerica,therearealotofdifferencesinshalegasexplorationanddev
6、elopmentinSouthernChinawhichincludeintensivetectonicmovementsinmarineshale,complexstressfield,deepburialdepth,specialsurfacecondition,etc.Withthose,itcouldbeineffectiveiftheexistingtheoriesandtechniquesofshalegasdevelopedinAmericaaretakenforgranted.Theeffectsofnano-poreform
7、ationonshalegasproductionareunclear;Predictionmethodsforshalegasproductionhavenotbeenestablished;Intheprocessofdrilling,thehorizontalsectioncollapsesseriouslyandthedrillingcycleistoolong;Stimulationeffectisnotideal,withlowsinglewellproduction.Inordertoeffectivelydevelopshal
8、egasinSouthernChina,threescientificissuesshouldbestudiedwhichincludequantitativech