CAJ | 학술논문

目前,针对陆相薄互层油藏实施时移地震监测尚没有明显的突破,加强时移地震方法、理论的研究和应用,对于我国时移地震监测技术的发展和应用具有积极的意义.根据油藏工程理论,在详细分析火烧油层对储层物性影响的基础上,结合已有的实验室岩石物理测量结果,重点就稠油热采过程中温度的剧烈变化对储层岩石和孔隙流体弹性特性的影响进行了较为详细的分析.并开展了薄互层油藏火烧油层地震正演模拟研究.结果表明,在稠油热采过程中,高温高压不仅会使得孔隙流体特性发生显著的改变,而且储层岩石本身弹性特性的变化也非常明显.即使是对于薄层或薄互层,两方面共同的变化将使得稠油热采前后储层弹性特性产生巨大的差异,进而引起显著的地震异常.因此,开展陆相薄互层稠油热采时移地震监测,不仅具有坚实的岩石物理基础,而且具有切实的可行性.
목전,침대륙상박호층유장실시시이지진감측상몰유명현적돌파,가강시이지진방법、이론적연구화응용,대우아국시이지진감측기술적발전화응용구유적겁적의의.근거유장공정이론,재상세분석화소유층대저층물성영향적기출상,결합이유적실험실암석물리측량결과,중점취주유열채과정중온도적극렬변화대저층암석화공극류체탄성특성적영향진행료교위상세적분석.병개전료박호층유장화소유층지진정연모의연구.결과표명,재주유열채과정중,고온고압불부회사득공극류체특성발생현저적개변,이차저층암석본신탄성특성적변화야비상명현.즉사시대우박층혹박호층,량방면공동적변화장사득주유열채전후저층탄성특성산생거대적차이,진이인기현저적지진이상.인차,개전륙상박호층주유열채시이지진감측,불부구유견실적암석물리기출,이차구유절실적가행성.
Till now,time-lapse seismic monitoring of land thin-interbedding reservoirs has not made a clear breakthrough.It has active significance to strengthen studies and application of the time-lapse seismic method and theory for development and application of this technique in our country.At First,according to reservoir engineering theory,the influence of fire flooding on reservoir property is analyzed in detail.Then we emphatically study for the variation of elastic property of reservoir rock and pore fluid in the thermal recovery of heavy oil reservoirs by the Use of the previous petrophysical data from lab core test.Further,we make the seismic forward modeling of fire flooding in land thin-interbedding reservoirs.Results show that thermal recovery can obviously change the elastic property of pore fluid and rock at high temperature and pressure.Even for a thin reservoir or a thin interbed reservoir,the common variation both pore fluid and rock will produce a huge elastic property difference between pre-or post-thermal recovery and cause obvious seismic anomalies.Therefore it is feasible for us to apply the time-lapse seismic method to the monitoring of the thermal recovery of thin interbed heavy oil reservoirs,which has the solid petrophysical foundation.