| With the deepening of oil and gas exploration and development,unconventional reservoirs have become a more realistic breakthrough target and a future alternative energy source.Unconventional reservoirs in daqing exploration area mainly include tight sandstone oil,tight sand gas,coal bed methane and shale fracture oil exporation fields.Dense oil of daqing exploration area is mainly focused on the high platform and fuyu oil layer reservoir,because of the tight sandstone reservoir phisical property is poor,it with conventional reservoir forming mechanism,occurrence state,distribution and the way of exporation and development has the very big difference,such as the evaluation of dense oil mainly concentrated in the lithology,physical property,oiliness,source characteristics,brittleness,electrical,to stress the opposite sex,and stress on the characteristics of "eight".At present,the development of dense oil for horizontal wells,long horizontal drilling coring,and as the oil-base drilling fluid.The reservoir lithology,physical property and oil content was applied to evaluate conventional technology brings great difficulty,uranlium needle postassium and object is the analysis of the X-ray diffraction technology cutting samples,which are not affected by the above factors,can assist the establishment of lithologic profiles,the determination of organic matter abundance and the evaluation of physical properties,,providing technical support for unconventional reservoir evaluation.Based on laboratory test,this paper established the X ray diffraction and uranium club potassium analysis method,based on thin section analysis and triaxial stress experiment,has been clear about the mineral components of lithology,physical properties and the influence or brittle relationship,formed the dense oil reservoir lithology,brittle,and the evaluation method of organic matter abundance,explored based on the mineral composition of petrophysical evaluation method. |
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