准噶尔盆地气层录井解释评价方法

Logging interpretation and evaluation of gas reservoirs in the Junggar Basin

准噶尔盆地天然气藏油气成因复杂,储层类型多样,天然气录井解释存在诸多难点。根据该区碎屑岩、火成岩的油气成藏控制因素、储层特征,以岩屑、岩心、气测、地球化学、罐顶气、定量荧光等录井资料为基础,建立了相应的天然气层录井采集、评价系列,并采用了与之相适应的录井解释评价技术;利用地层的含油气性、物性、孔隙压力参数,优选和开发了组分正规化图版、含油气性—物性双因素关系图版、气测形态法等解释图版。应用上述录井解释评价方法,于2007—2010年对准噶尔盆地32口井57层气层、气水同层、水层进行了综合解释评价,其符合率达到88%,取得了较好的应用效果。

Gas reservoirs in the Junggar Basin are featured by strong complexity of genesis and large variety of reservoir types,which results in great difficulty in logging interpretation of gas layers.According to the controlling factors of hydrocarbon accumulation in the clastic and volcanic reservoirs in the study area,we established a logging acquisition and evaluation technical series based on various logging data in cutting,core,mud logging,geochemical properties,headspace gas and quantitative fluorescence.Corresponding logging interpretation and evaluation methods were also presented.The hydrocarbon-bearing properties,physical properties,and pore pressure parameters were used to optimize and develop composition standardized chart board,oil-bearing and physical property dual-factor relationship chart board,and mud logging shape chart board.These methods were used in comprehensive interpretation of 57 gas layers,gas-water layers,and water layers in 32 wells in the Junggar Basin during 2007-2010.The coincidence rate of interpretation was up to 88%.